Toyota Camry 2007-2009 Service Manual - U250E_Automatic

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AUTOMATIC TRANSAXLE SYSTEM

PRECAUTION

NOTICE:

• Perform the RESET MEMORY (AT initialization) when replacing the automatic transaxle assembly, engine assembly or ECM (See page AX-16).

• Perform the REGISTRATION (VIN registration) when replacing the ECM (See page ES-16).

HINT: RESET MEMORY can not be completed by only disconnecting the battery cable.

1. EXPRESSION OF IGNITION SWITCH

The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section.

AX–1

Switch Type

Expression

Ignition switch off

Ignition switch on (IG)

Ignition switch on (ACC)

Engine start

Ignition Switch (Position)

LOCK

ON

ACC

START

2. The automatic transaxle is composed of highly

precision-finished parts which need careful inspection before reassembly. Even a small nick could cause fluid leakage or affect the performance. The instructions here are organized so that you work on only one component group at a time. This will help avoid confusion caused by similar-looking parts of different sub-assemblies being on your workbench at the same time. The component groups are inspected and repaired from the converter housing side. Complete the inspection, repair and

Engine Switch (Condition)

Off

On (IG)

On (ACC)

Start

E116900E03

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AX–2

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

reassembly before proceeding to the next component group as much as possible. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because some parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups. Recommended: ATF WS

3. All disassembled parts should be washed clean and any fluid passages and holes should be blown through with compressed air.

4. Dry all parts with compressed air. Never use a shop rag or a piece of cloth to dry them.

5. When using compressed air, always aim away from yourself to prevent accidentally spraying ATF or kerosene in your face.

6. Only recommended automatic transaxle fluid or kerosene should be used for cleaning.

7. After cleaning, the parts should be arranged in the correct order for efficient inspection, repair, and reassembly.

8. When disassembling a valve body, be sure to match each valve together with the corresponding spring.

9. New discs for the brakes and clutches that are to be used for replacement must be soaked in ATF for at least 15 minutes before reassembly.

10. All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with ATF prior to reassembly .

11. All gaskets and rubber O-rings should be replaced with new ones.

12. Do not apply adhesive cements to gaskets and similar parts.

13. Make sure that the ends of a snap ring are not aligned with one of the cutouts and are installed in the groove correctly.

14. When replacing a worn bushing, the sub-assembly containing the bushing must also be replaced.

15. Check thrust bearings and races for wear or damage. Replace them as necessary.

16. When working with FIPG material, you must observe the following:

• Using a razor blade and a gasket scraper, remove all

the old packing (FIPG) material from the gasket surface.

• Thoroughly clean all components to remove any

loose material.

• Clean both sealing surfaces with a non-residue

solvent.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

• Parts must be reassembled within 10 minutes of application. Otherwise, the packing (FIPG) material must be removed and reapplied.

AX–3

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DEFINITION OF TERMS

Term Definition

Monitor description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details). Related DTCs Diagnostic code

Preconditions that allow the ECM to detect malfunctions.

Typical enabling condition

Sequence of operation

Required sensor/components The sensors and components that are used by the ECM to detect malfunctions.

Frequency of operation

Duration Malfunction thresholds Beyond this value, the ECM will conclude that there is a malfunction and set a DTC.

MIL operation

Component operating range

With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction threshold(s).

The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunction. While another sensor is being monitored, the next sensor or component will not be monitored until the previous monitoring has concluded.

The number of times that the ECM checks for malfunctions per driving cycle. "Once per driving cycle" means that the ECM detects malfunction only one time during a single driving cycle. "Continuous" means that the ECM detects malfunction every time when enabling condition is met.

The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before setting a DTC. This timing begins after the "typical enabling conditions" are met.

MIL illumination timing after a defect is detected. "Immediately" means that the ECM illuminates MIL the instant the ECM determines that there is a malfunction. "2 driving cycle" means that the ECM illuminates MIL if the same malfunction is detected again in the 2nd driving cycle.

Normal operation range of sensors and solenoids under normal driving conditions. Use these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not.

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PARTS LOCATION

COMBINATION METER

- MIL (MALFUNCTION INDICATOR LAMP)

STOP LIGHT SWITCH ASSEMBLY

AX–5

TRANSMISSION CONTROL SWITCH

DLC3

(DATA LINK CONNECTOR 3)

SPEED SENSOR

SHIFT SOLENOID VALVE

PARK / NEUTRAL POSITION SWITCH

SL3

SR

SHIFT SOLENOID VALVE

(NC)

SLT

S4

SPEED SENSOR

ECM

SHIFT SOLENOID VALVE

(NT)

TRANSMISSION WIRE

(ATF TEMPERATURE SENSOR)

SHIFT SOLENOID VALVE

DSL

SL2

SL1

C136787E01

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SYSTEM DIAGRAM

The configuration of the electronic control system in the U250E automatic transaxles is as shown in the following chart.

Crankshaft Position Sensor

Engine Coolant Temperature

Throttle Position Sensor

Transmission Control Switch

(D ←→ 4 and 2 ←→ L Position)

Park/Neutral Position Switch

Speed Sensor

Skid Control ECU

NE

THW

VTA1, 2

VC

4, L

NSW, P

R, D, 3, 2

ECM

SL1

SL2

SL3

SLT

S4

Shift Solenoid Valve SL1

Shift Solenoid Valve SL2

Shift Solenoid Valve SL3

Shift Solenoid Valve SLT

Shift Solenoid Valve S4

AX

Combination Meter

Speed Sensor NC

Speed Sensor NT

Stop Light Switch Assembly

ATF (Automatic Transmission Fluid)

SPD

NC

NT

STP

TH01

DSL

SR

W

TC

Shift Solenoid Valve DSL

Shift Solenoid Valve SR

MIL (Malfunction Indicator Light)

DLC3 (Data Link Connector 3)

CAN

C136788E01

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SYSTEM DESCRIPTION

1. SYSTEM DESCRIPTION

(a) The ECT (Electronic controlled automatic

transmission/transaxle) is an automatic transmission/transaxle that electronically controls shift timing using the ECM. The ECM detects electrical signals that indicate engine and driving conditions, and controls the shift point, based on driver habits and road conditions. As a result, fuel efficiency and power transmission performance are improved. Shift shock has been reduced by controlling the engine and transmission simultaneously. In addition, the ECT has features such as follows:

• Diagnostic function.

• Fail-safe function when a malfunction occurs.

AX–7

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AX–8

1

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

• The ECM of this system is connected to the CAN and multiplex communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication systems.

• The intelligent tester can be used at steps 3, 4, 6, and 9.

Vehicle Brought to Workshop

Customer Problem Analysis

3

Connect the OBD II scan tool or intelligent tester to DLC3

Check and Clear DTCs and Freeze Frame Data

HINT: (See page AX-28).

Visual Inspection

Setting the Check Mode Diagnosis

HINT: (See page AX-29).

AX

Problem Symptom Confirmation

HINT: (See page AX-9).

Symptom does not occur: Go to step 8

8

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Symptom Simulation

DTC Check

AX–9

Symptom occurs: Go to step 9

HINT: (See page IN-45).

HINT: (See page AX-28).

DTC is not output: Go to step 10

DTC is output: Go to step 17

10

OK

11

OK

12

Basic Inspection

Mechanical System Test

Hydraulic Test

HINT: (See page AX-123, AX-129 and AX-182).

NG

HINT: (See page AX-12).

NG

HINT: (See page AX-14).

Go to step 19

Go to step 16

OK

13

Manual Shifting Test

NG

HINT: (See page AX-15).

NG

Go to step 16

Go to step 15

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AX–10

OK

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

14

OK

15

17

Problem Symptoms Table Chapter 1

HINT: (See page AX-19).

NG

Problem Symptoms Table Chapter 2

HINT: (See page AX-19).

Part Inspection

DTC Chart

Go to step 18

Go to step 19

HINT: (See page AX-35).

Circuit Inspection

Repair or Replace

Confirmation Test

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

ROAD TEST

1. PROBLEM SYMPTOM CONFIRMATION

(a) Based on the result of the customer problem

analysis, try to reproduce the symptoms. If the problem is that the transaxle does not shift up, shift down, or the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and simulate the problem symptoms.

2. ROAD TEST NOTICE: Perform the test at the A TF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F) in the normal operation.

(a) D position test:

Shift into the D position and fully depress the accelerator pedal and check the following points. (1) Check up-shift operation.

Check that 1 → 2, 2 → 3, 3 → 4 and 4 → 5th upshifts take place, and that the shift points conform to the automatic shift schedule (See page SS-40). HINT: 5th Gear Up-shift Prohibition Control

• Engine coolant temperature is 55°C (131°F) or less and vehicle speed is at 70 km/h (43 mph) or less.

• ATF temperature is -2°C (28°F) or less.

5th and 4th Gear Lock-up Prohibition Control

• Brake pedal is depressed.

• Accelerator pedal is released.

• Engine coolant temperature is 60°C (140°F) or less.

(2) Check for shift shock and slip.

Check for shock and slip at the 1 → 2, 2 → 3, 3 → 4 and 4 → 5th up-shifts.

(3) Check for abnormal noise and vibration.

Check for abnormal noise and vibration when up-shifting from 1 → 2, 2 → 3, 3 → 4, and 4 → 5 while driving with the shift lever in the D position, and also check while driving in the lock-up condition. HINT: The check for the cause of abnormal noise and vibration must be done thoroughly as it could also be due to loss of balance in the differential, torque converter clutch, etc.

(4) Check kick-down operation.

Check vehicle speeds when the 2nd to 1st, 3rd to 2nd, 4th to 3rd, and 5th to 4th kick-downs take place while driving with the shift lever in the D position. Confirm that each speed is within the applicable vehicle speed range indicated in the automatic shift schedule (See page SS-40).

AX–11

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(5) Check abnormal shock and slip at kick-down. (6) Check the lock-up mechanism.

• Drive in D position (5th gear), at a steady speed (lock-up ON).

• Lightly depress the accelerator pedal and check that the engine speed does not change abruptly.

HINT:

• There is no lock-up in the 1st and 2nd gear.

• 4th lock-up operates while uphill-downhill is active in the D position.

• If there is a big jump in engine speed, there is no lock-up.

(b) 4 (O/D OFF) position test:

Shift into the 4 position and fully depress the accelerator pedal and check the following points. (1) Check up-shift operation.

Check that the 1 → 2, 2 → 3 and 3 → 4 up-shift take place and that the shift point conforms to the automatic shift schedule (See page SS-40). HINT: There is no 5th up-shift in the 4 position.

(2) Check engine braking.

While driving in the 4 position and 4th gear, release the accelerator pedal and check the engine braking effect.

(3) Check for abnormal noise during acceleration

and deceleration, and for shock at up-shift and down-shift.

(c) 3 position test:

Shift into the 3 position and fully depress the accelerator pedal and check the following points. (1) Check up-shift operation.

Check that the 1 → 2 and 2 → 3 up-shift take place and that the shift point conforms to the automatic shift schedule (See page SS-40). HINT: There is no 4th up-shift and lock-up in the 3 position.

(2) Check engine braking.

While running in the 3 position and 3rd gear, release the accelerator pedal and check the engine braking effect.

(3) Check for abnormal noise during acceleration

and deceleration, and for shock at up-shift and down-shift.

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(d) 2 position test:

Shift into the 2 position and fully depress the accelerator pedal and check the following points. (1) Check up-shift operation.

Check that the 1 →2 up-shift takes place and that the shift point conforms to the automatic shift schedule (See page SS-40). HINT: There is no 3rd up-shift and lock-up in the 2 position.

(2) Check engine braking.

While running in the 2 position and 2nd gear, release the accelerator pedal and check the engine braking effect.

(3) Check for abnormal noise during acceleration

and deceleration, and for shock at up-shift and down-shift.

(e) L position test:

Shift into the L position and fully depress the accelerator pedal and check the following points. (1) Check no up-shift.

While running in the L position, check that there is no up-shift to 2nd gear. HINT: There is no lock-up in the L position.

(2) Check engine braking.

While running in the L position, release the accelerator pedal and check the engine braking effect.

(3) Check for abnormal noise during acceleration

and deceleration.

(f) R position test:

Shift into the R position, lightly depress the accelerator pedal, and check that the vehicle moves backward without any abnormal noise or vibration.

CAUTION: Before conducting this test ensure that the test area is free from people and obstruction.

(g) P position test:

Stop the vehicle on the grade (more than 5°) and after shifting into the P position, release the parking brake. Then, check that the parking lock pawl holds the vehicle in place.

(h) Uphill/downhill control function test:

(1) Check that the gear does not up-shift to the 4th

or 5th gear while the vehicle is driving uphill.

(2) Check that the gear automatically down-shifts

from 5th to 4th or from the 4th to 3rd gear when brake is applied while the vehicle is driving downhill.

AX–13

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Evaluation:

Problem Possible cause

(a) Stall engine speed is low in D position

(b) Stall engine speed is high in D position

MECHANICAL SYSTEM TESTS

1. PERFORM MECHANICAL SYSTEM TESTS

(a) Measure the stall speed.

The object of this test is to check the overall performance of the transaxle and engine by measuring the stall speeds in the D position.

NOTICE:

• Driving test should be done on a paved road (a nonskid road).

• Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature 50 to 80°C (122 to 176°F).

• Do not continuously run this test for longer than 10 seconds.

• To ensure safety, do this test in a wide, clear level area which provides good traction.

• The stall test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is doing the test.

(1) Chock the 4 wheels. (2) Connect the intelligent tester to the DLC3. (3) Fully apply the parking brake. (4) Keep your left foot pressed firmly on the brake

pedal. (5) Start the engine. (6) Shift into the D position. Press all the way down

on the accelerator pedal with your right foot. (7) Quickly read the stall speed at this time.

Stall speed:

2,310 +- 150 rpm

• Engine power output may be insufficient

• Stator one-way clutch not operating properly HINT: If the value is less than the specified value by 600 rpm or more, the torque converter could be faulty.

• Line pressure is too low

• Forward clutch slipping

• U/D (Underdrive) brake slipping

• U/D (Underdrive) one-way clutch is not operating properly

• No.1 one-way clutch not operating properly

• Improper fluid level

AX

(b) Measure the time lag.

(1) When the shift lever is shifted while the eng ine is

idling, there will be a certain time lapse or lag

before the shock can be felt. This is used for

checking the condition of the clutch and brake.

NOTICE:

• Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F).

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

• Be sure to allow 1 minute interval between tests.

• Perform the test three times, and measure the time lags. Calculate the average value of the three time lags.

(2) Connect the intelligent tester to the DLC3. (3) Fully apply the parking brake. (4) Start and warm up the engine and check idle

speed.

Idle speed:

approx. 700 rpm (In N position and A/C OFF)

(5) Shift the lever from N to D position. Using a stop

watch, measure the time from when the lever is shifted until the shock is felt.

Time lag:

N → D less than 1.2 seconds

(6) In the same way, measure the time lag for N →

R.

Time lag:

N → R less than 1.5 seconds

Evaluation (If N → D or N → R time lag is longer than the specified):

Problem Possible cause

• Line pressure is too low

• Forward clutch worn

N → D time lag is longer

N → R time lag is longer

• No.1 one-way clutch is not operating properly

• U/D (Underdrive) one-way clutch is not operating

• U/D (Underdrive) brake worn

• Line pressure is too low

• Reverse clutch worn

• 1st and reverse brake worn

• U/D (Underdrive) brake worn

AX–15

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AX–16

Test Plug A:

D Position (CO)

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SST

Specified line pressure:

Condition

Test Plug B:

R Position (C2)

Idling

SST

C109078E01

HYDRAULIC TEST

1. PERFORM HYDRAULIC TEST

(a) Measure the line pressure.

NOTICE:

• Perform the test at the normal operating ATF (Automatic Transmission Fluid) temperature: 50 to 80°C (122 to 176°F).

• The line pressure test should always be carried out in pairs. One technician should observe the conditions of wheels or wheel stoppers outside the vehicle while the other is performing the test.

• Be careful to prevent SST hose from interfering with the exhaust pipe.

• This Check must be conducted after checking and adjusting engine.

• Perform under condition that A/C is OFF.

• When conducting stall test, do not continue more than 10 seconds.

(1) Warm up the ATF (Automatic Transmission

Fluid). (2) Lift the vehicle up. (3) Remove the engine under cover. (4) Connect intelligent tester to DLC3. (5) Remove the test plug A on the transaxle case

front left side and install the SST.

SST 09992-00095 (09992-00231, 09992-

00271) NOTICE: There is a difference in installation point between D position and R position.

(6) Start the engine. (7) Using intelligent tester, shift to D position and

hold 3rd gear by active test, and measure the line pressure in idling.

D position kPa (kgf / cm

372 to 412 kPa

(3.8 to 4.2 kgf/cm

2

, psi)

2

, 54 to 60 psi)

AX

(8) Turn the ignition switch off.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Transmission Wire

C109079E01

AX–17

(9) Disconnect the connector of the transmission

wire. HINT: Disconnect the connector only when performing

the D position stall test. (10)Start the engine. (11)Firmly depress the brake pedal, shift to the D

position, depress the accelerator pedal all the

way down and check the line pressure while the

stall test is performed.

Specified line pressure:

Condition

Stall test

D position kPa (kgf / cm

931 to 1,031 kPa

(9.5 to 10.5 kgf/cm

2

, psi)

, 135 to 150 psi)

(12)Turn the ignition switch off. (13)Remove the SST, install the test plug A. (14)Remove the test plug B, install the SST and

start engine.

SST 09992-00095 (09992-00231, 09992-

00271)

(15)Connect the transmission wire connector,

depress the brake pedal firmly, shift to the R

position and check that the line pressure while

the engine is idling and during the stall test.

Specified line pressure:

Condition

Idling

Stall test

R position kPa (kgf / cm

672 to 742 kPa

(6.9 to 7.6 kgf/cm

1,768 to 1,968 kPa

(18.0 to 20.1 kgf/cm

2

, psi)

, 97 to 108 psi)

2

, 256 to 285 psi)

Evaluation:

Problem Possible cause

Measured values are higher than specified in all positions

Measured values are lower than specified in all positions

Pressure is low in the D position only

Pressure is low in the R position only

(16)Remove the SST, install the test plug B. (17)Clear the DTC.

• Shift solenoid valve (SLT) defective

• Regulator valve defective

• Shift solenoid valve (SLT) defective

• Regulator valve defective

• Oil pump defective

• U/D (Underdrive) direct clutch defective

• D position circuit fluid leak

• Forward clutch defective

• R position circuit fluid leak

• Reverse clutch defective

• 1st and reverse brake defective

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

MANUAL SHIFTING TEST

1. PERFORM MANUAL SHIFTING TEST

HINT:

• With this test, it can be determined whether the trouble occurs in the electrical circuit or is a mechanical problem in the transaxle.

• If any abnormalities are found in the following test, the problem is in the transaxle itself.

(a) Disconnect the connector of the transmission wire. (b) Drive with the transmission wire disconnected.

Shifting the shift lever in the orde r of L, 2, 3, 4 and D position to check whether the shifting condition changes the table below.

Shift Position Shifting Condition

L ←→ 2 No Shift (Not Change) 2 ←→ 3 Down Shift ←→ Up Shift

3 ←→ 4 ←→ D No Shift (Not Change)

HINT: When driving with the transmission wire disconnected, the shift lever position is in L or 2, the gear position is held in 3rd and the shift lever position is in 3, 4 or D, the gear position is held in 4th. However, when the shif t position is in R or P, the

operation is same as usual. (c) Connect the connector of the transmission wire. (d) Clear the DTC.

Transmission Wire

C109079E01

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INITIALIZATION

1. RESET MEMORY NOTICE:

• Perform the RESET MEMORY (AT initialization)

when replacing the automatic transaxle assembly, engine assembly or ECM.

• The RESET MEMORY can be performed only with

the Intelligent tester.

HINT: The ECM memorizes the condition that the ECT controls the automatic transaxle assembly and engine assembly according to those characteristics. Therefore, when the automatic transaxle assembly , engine assembly, or ECM has been replaced, it is necessary to reset the memory so that the ECM can memorize the new information. Reset procedure is as follows. (a) Turn the ignition switch off. (b) Connect the intelligent tester to the DLC3. (c) Turn the ignition switch on (IG) position and push

the intelligent tester main switch on.

(d) Select the item "DIAGNOSIS / ENHANCED OBD

II".

(e) Perform the reset memory procedure from the

ENGINE menu.

CAUTION: After performing the RESET MEMORY, be sure to perform the ROAD TEST (See page AX-9) described earlier.

HINT: The ECM is learned by performing the ROAD TEST. (1) Tester menu flow:

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

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G023367

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

MONITOR DRIVE PATTERN

1. MONITOR DRIVE PATTERN FOR ECT TEST

(a) Perform this drive pattern as one method to

simulate the detection conditions of the ECT malfunctions. (The DTCs may not be detected due the actual driving conditions. And some codes may not be detected through this drive pattern.) HINT: Preparation for driving

• Warm up the engine sufficiently. (Engine coolant temperature is 60°C (140°F) or higher)

• Drive the vehicle when the atmospheric temperature is -10°C (14°F) or higher. (Malfunction is not detected when the atmospheric temperature is less than -10°C (14°F))

Driving note

• Drive the vehicle through all gears. Stop → 1st → 2nd → 3rd → 4th → 5th → 5th (lock-up ON).

• Repeat the above driving pattern three times or more.

NOTICE:

• The monitor status can be checked using the OBD II scan tool or intelligent tester. When using the intelligent tester, monitor status can be found in the "ENHANCED OBD II / DATA LIST" or under "CARB OBD II".

• In the event that the drive pattern must be interrupted (possibly due to traffic conditions or other factors), the drive pattern can be resumed and, in most cases, the monitor can be completed.

• Perform this drive pattern on a level road as much as possible and strictly observe the posted speed limits and traffic laws while driving.

AX–21

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Vehicle Speed

Maintain a constant speed or gradual acceleration (with the throttie open) for 3 minutes or more.*1

Approx. 100 km/h (62mph)

Approx. 80 km/h (50mph)

0

Warmed up sufficiently

Lock-up ON Vehicle Speed

Stop (Idling) Normal acceleration through all the gears from 1st to 5th

G031593E12

HINT: *1: Drive at such a speed in the uppermost gear, to engage lock-up. The vehicle can be driven at a speed lower than that in the above diagram under the lock-up condition.

NOTICE: If necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF temperature sensor malfunction).

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PROBLEM SYMPTOMS TABLE

HINT:

• If a normal code is displayed during the diagnostic trouble code check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the charts on the following pages and procee d to the p age given for troubleshooting.

• The Matrix Chart is divided into 2 chapters.

• When the circuit on which mark *1 is attached is a malfunction, DTC could be output.

Chapter 1: Refer to the table below when the trouble cause is considered to be electrical the instruction "Proceed to next circuit inspection shown on matrix chart" is given in the flow chart of each circuit, proceed to the circuit with the next highest number in the table to continue the check. If the trouble still occurs even though there are no abnormalities in any of the other circuits, check and replace the ECM.

1. Chapter 1: Electronic Circuit Matrix Chart

Symptom Suspected area See page

No down-shift (A particular gear, from 1st to 4th gear, is not down-shifted)

No down-shift (5th -> 4th)

No up-shift (A particular gear, from 1st to 4th gear, is not up-shifted)

No up-shift (4th -> 5th)

No lock-up

No lock-up off ECM IN-40

Shift point too high or too low

Up-shift to 5th from 4th while shift lever is in 4 position

Up-shift to 5th from 4th while engine is cold

Up-shift to 2nd from 1st while shift lever is in L position

Harsh engagement (N -> D)

Harsh engagement (Lock-up) ECM IN-40 Harsh engagement (Any driving position) ECM IN-40 Poor acceleration ECM IN-40 No kick-down ECM IN-40 Engine stalls when starting off or stopping ECM IN-40

Malfunction in shifting

ECM IN-40

1. Transmission control switch (4 <--> D position) circuit *1 AX-39

2. Shift solenoid valve (S4) circuit *1 AX-106

3. ECM IN-40 ECM IN-40

1. Transmission control switch (4 <--> D position) circuit *1 AX-39

2. Shift solenoid valve (S4) circuit *1 AX-106

3. ECM IN-40

1. Stop light switch circuit *1 AX-60

2. Engine coolant temp. sensor circuit *1 ES-53

3. ECM IN-40

1. Throttle position sensor circuit *1 ES-53

2. ECM IN-40

1. Transmission control switch (4 <--> D position) circuit *1 AX-39

2. ECM IN-40

1. Engine coolant temp. sensor circuit *1 ES-53

2. ECM IN-40

1. Transmission control switch (2 <--> L position) circuit *1 AX-39

2. ECM IN-40

1. Shift solenoid valve (SL1) circuit *1 AX-73

2. ECM IN-40

1. Park/neutral position switch circuit *1 AX-39

2. ECM IN-40

AX–23

AX

AX–24

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

2. Chapter 2: On-Vehicle Repair and Off-Vehicle Repair

Symptom Suspected area See page

Vehicle does not move in any forward position and in reverse positions

Vehicle does not move in R position

No up-shift (1st -> 2nd)

No up-shift (2nd -> 3rd)

No up-shift (3rd -> 4th)

No up-shift (4th -> 5th)

No down-shift (5th -> 4th)

No down-shift (4th -> 3rd) Valve body assembly AX-138 No down-shift (3rd -> 2nd) Valve body assembly AX-138 No down-shift (2nd -> 1st) Valve body assembly AX-138

No lock-up or No lock-up off

Harsh engagement (N -> D)

Harsh engagement (Lock-up)

Harsh engagement (N -> R)

Harsh engagement (1st -> 2nd -> 3rd -> 4th -> 5th)

Harsh engagement (1st -> 2nd)

Harsh engagement (2nd -> 3rd)

Harsh engagement (3rd -> 4th)

Harsh engagement (4th -> 5th)

1. Valve body assembly AX-138

2. U/D brake (B3) AX-204

3. Torque converter clutch AX-193

1. Valve body assembly AX-138

2. Reverse clutch (C2) AX-204

3. 1st and reverse brake (B2) AX-204

1. Valve body assembly AX-138

2. 2nd and O/D brake (B1) AX-204

1. Valve body assembly AX-138

2. Direct and O/D clutch (C0) AX-204

1. Valve body assembly AX-138

2. 2nd and O/D brake (B1) AX-204

1. Shift solenoid valve (S4) AX-295

2. Valve body assembly AX-138

3. U/D clutch (C3) AX-204

1. Shift solenoid (S4) AX-295

2. Valve body assembly AX-138

1. Shift solenoid valve (DSL) AX-295

2. Valve body assembly AX-138

3. Torque converter clutch AX-193

1. Shift solenoid valve (SL1) AX-295

2. Valve body assembly AX-138

3. C1 accumulator AX-204

4. Forward clutch (C1) AX-204

5. One-way clutch No.1 (F1) AX-204

6. U/D one-way clutch (F2) AX-204

1.Shift solenoid valve (SL2) AX-295

2. Valve body assembly AX-138

3. Torque converter clutch AX-193

1. Valve body assembly AX-138

2. C2 accumulator AX-204

3. Reverse clutch (C2) AX-204

4. 1st and reverse brake (B2) AX-204

1. Shift solenoid valve (SLT) AX-295

2. Valve body assembly AX-138

1. Valve body assembly AX-138

2. 2nd and O/D brake (B1) AX-204

1. Valve body assembly AX-138

2. C0 accumulator AX-204

3. Direct and O/D clutch (C0)

1. Valve body assembly AX-138

2. 2nd and O/D brake (B1) AX-204

1. Valve body assembly AX-138

2. C3 accumulator AX-204

3. U/D clutch (B3) AX-204

AX-204

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Symptom Suspected area See page

Harsh engagement (5th -> 4th)

Slip or shudder (Forward and reverse: After warm-up)

Slip or shudder (Particular position: Just after engine starts)

Slip or shudder (R position)

Slip or shudder (1st)

Slip or shudder (2nd) 2nd and O/D b rake (B1) AX-204 Slip or shudder (3rd) Direct and O/D clutch (C0) AX-204 Slip or shudder (4th) 2nd and O/D brake (B1) AX-204 Slip or shudder (5th) U/D clutch (C3) AX-204 Shift position too high or too low Shift solenoid valve (SLT) AX-295 No engine braking (1st +- 4th: D position) U/D brake (B3) AX-204

No engine braking (1st: L (1) position)

No engine braking (2nd: 2 position)

No engine braking (3rd: 3 position) U/D brake (B3) AX-204 No kick-down Valve body assembly AX-138

Poor acceleration (All positions)

Poor acceleration (5th)

Engine stalls when starting off or stopping

1. Valve body assembly AX-138

2. B3 accumulator AX-204

1. Valve body assembly AX-138

2. Oil strainer AX-138

3. Direct and O/D clutch (C0) AX-204

4. Forward clutch (C1) AX-204

5. U/D clutch (C3) AX-204

6. 2nd and brake (B1) AX-204

7. U/D brake (B3) AX-204

8. One-way clutch No.1 (F1) AX-204

9. U/D one-way clutch (F2) AX-204

10. Torque converter clutch AX-193 Torque converter clutch AX-193

1. Reverse clutch (C2) AX-204

2. 1st and reverse brake (B2) AX-204

1. Forward clutch (C1) AX-204

2. One-way clutch No. 1 (F1) AX-204

3. U/D one-way clutch (F2) AX-204

1. Valve body assembly AX-138

2. 1st and reverse brake (B2) AX-204

1. Valve body assembly AX-138

2. 2nd and O/D brake (B1) AX-204

1. Shift solenoid valve (SLT) AX-295

2. Torque converter clutch AX-193

1. U/D clutch (C3) AX-204

2. U/D planetary gear unit AX-204

1. Shift solenoid valve (DSL) AX-295

2. Torque converter clutch AX-193

AX–25

AX

AX–26

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TERMINALS OF ECM

1. ECM

C24 A24

AX























HINT: Each ECM terminal's standard voltage is shown in the table below. In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to inspected. The standard voltage between the terminals is shown under "Specific Condition". Use the illustration above as a reference for the ECM terminals.

Symbols (Terminals No.)

D (C24-56) - E1 (C24-104) G - W-B

R (C24-53) - E1 (C24-104) P - W-B

SPD (A24-8) - E1 (C24-104) L - W-B Speed signal Vehicle speed 20 km/h (12mph)

STP (A24-36) - E1 (C24-104) W - W-B Stop light switch signal

4 (A24-25) - E1 (C24-104) G - W-B

3 (A24-26) - E1 (C24-104) G - W-B

2 (C24-55) - E1 (C24-104) V - W-B

Wiring Color

Terminal Description Condition Specified Condition

Ignition switch on (IG) and shift

D shift position switch

signal

R shift position switch

signal

4 shift position switch

signal

3 shift position switch

signal

2 shift position switch

signal

lever D and 4 position Ignition switch on (IG) and shift

lever except D and 4 position Ignition switch on (IG) and shift

lever R position Ignition switch on (IG) and shift

lever except R position

Brake pedal is depressed 7.5 to 14 V Brake pedal is released Below 1.5 V Ignition switch on (IG) and shift

lever 4 position Ignition switch on (IG) and shift

lever except 4 position Ignition switch on (IG) and shift

lever 3 position Ignition switch on (IG) and shift

lever except 3 position Ignition switch on (IG) and shift

lever 2 and L position Ignition switch on (IG) and shift

lever except 2 and L position















10 to 14 V

Below 1 V

10 to 14 V

Below 1 V Pulse generation

(See waveform 8)

10 to 14 V

Below 1 V

10 to 14 V

Below 1 V

10 to 14 V

Below 1 V









A107881E12

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–27

Symbols (Terminals No.)

L (C24-74) - E1 (C24-104) BR - W-B

P (C24-73) - E1 (C24-104) GR - W-B Park position switch signal

N (C24-54) - E1 (C24-104) SB - W-B

NSW (C24-52) - E1 (C24-104) SB - W-B Park neutral switch signal

DSL (C24-79) - E1 (C24-104) BR - W-B DSL solenoid signal

SR (C24-80) - E1 (C24-104) G - W-B SR solenoid signal

S4 (C24-78) - E1 (C24-104) GR - W-B S4 solenoid signal

SL3+ (C24-60) - SL3- (C24-61) O - Y SL3 solenoid signal Engine idle speed

SL2+ (C24-58) - SL2- (C24-59) G - R SL2 solenoid signal Engine idle speed

SL1+ (C24-57) - SL1- (C24-77) L - L-G SL1 solenoid signal Engine idle speed

NC+ (C24-101) - NC- (C24-102) LG - P Speed sensor (NC) signal

NT+ (C24-125) - NT- (C24-124) G - W Speed sensor (NT) signal Vehicle speed 20 km/h (12mph)

SLT+ (C24-76) - SLT- (C24-75) L - W SLT solenoid signal Engine idle speed

THO1 (C24-72) - ETHO (C24-95) Y - BR

Wiring Color

Terminal Description Condition Specified Condition

Ignition switch on (IG) and shift

L shift position switch

signal

Neutral position switch

signal

ATF temperature sensor

signal

lever L position Ignition switch on (IG) and shift

lever except L position Ignition switch on (IG) and shift

lever P position Ignition switch on (IG) and shift

lever except P position Ignition switch on (IG) and shift

lever N position Ignition switch on (IG) and shift

lever except N position Ignition switch on (IG) and shift

lever P and N position Ignition switch on (IG) and shift

lever except P and N position Vehicle speed 65 km/h (40mph),

lock-up (ON to OFF) Ignition switch on (IG) Below 1 V 3rd, 4th or 5th gear 10 to 14 V 1st or 2nd gear Below 1 V Ignition switch on (IG) Below 1 V 5th gear 10 to 14 V Except 5th gear Below 1 V

Vehicle speed 30 km/h (19mph): (3rd gear) Engine speed 1,400 rpm

ATF temperature: 115°C (239°F) or more

10 to 14 V

Below 1 V

10 to 14 V

Below 1 V

10 to 14 V

Below 1 V

Below 2 V

10 to 14 V Pulse generation

(See waveform 2)

Pulse generation (See waveform 3)

Pulse generation (See waveform 4)

Pulse generation (See waveform 5)

Pulse generation (See waveform 6)

Pulse generation (See waveform 7)

Pulse generation (See waveform 1)

Below 1.5 V

1 ms/DIV

5 V/DIV

GND

G023426E01

(a) Waveform 1

Reference:

Terminal SLT+ - SLTTool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed

AX

AX–28

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(b) Waveform 2

Reference:

Vehicle speed 65 km/h (40 mph), lock-up (ON to OFF)

100 ms/DIV

10 V/DIV

GND

C053420E07

Terminal DSL - E1 Tool setting 10 V/DIV, 100ms/DIV

Vehicle condition

(c) Waveform 3

Reference:

1 ms/DIV

5 V/DIV

GND

G023426E01

Terminal SL3+ - SL3Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed

1 ms/DIV

5 V/DIV

GND

G023426E01

5 V/DIV

GND

G023426E07

1 V/DIV

GND

(d) Waveform 4

Reference:

Terminal SL2+ - SL2Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed

(e) Waveform 5

Reference:

Terminal SL1+ - SL1Tool setting 5 V/DIV, 1ms/DIV Vehicle condition Engine idle speed

(f) Waveform 6

Reference:

Terminal NC+ - NCTool setting 1 V/DIV, 1ms/DIV

Vehicle condition

Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1.400 rpm

AX

1 ms/DIV

C093866E08

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(g) Waveform 7

Reference:

0.5 ms/DIV

5 V/DIV

GND

C053419E12

Terminal NT+ - NTTool setting 5 V/DIV, 0.5ms/DIV Vehicle condition Vehicle speed 20 km/h (12 mph)

(h) Waveform 8

5 V/DIV

Terminal SPD - E1 Tool setting 5 V/DIV, 20ms/DIV Vehicle condition Vehicle speed 20 km/h (12 mph)

Reference:

AX–29

20 ms/DIV

GND

C053421E08

HINT: Depending on the vehicle, the output waveform voltage, influenced by optionally installed systems, may become 5V.

AX

AX–30

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) When troubleshooting OBD II vehicles, the only

difference from the usual troubleshooting procedure is to connect an OBD II scan tool complying with SAE J1987 or a intelligent tester to the vehicle, and read off various data output from the vehicle's ECM.

(b) OBD II regulations require that the vehicle's on-

board computer illuminate the Malfunction Indicator Lamp (MIL) on the instrument panel when the computer detects a malfunction in the computer itself or in the drive system components which af fect the vehicle emissions. In addition to illuminating the MIL when a malfunction is detected, the applicable DTCs prescribed by SAE J2012 are recorded in the ECM memory (See page AX-35).

FI00534

If the malfunction does not occur in 3 consecutive trips, the MIL goes off but the DTCs remain in the ECM memory.

Intelligent Tester

DLC3

CAN VIM

C131977E05

(c) To check the DTCs, conn ect the OBD II scan tool or

intelligent tester to the DLC3 of the vehicle. The OBD II scan tool or intelligent tester also enables you to erase the DTCs and check freeze frame data and various forms of engine data (For operating instructions, see the instruction book).

(d) The DTCs include SAE controlled codes and

Manufacturer controlled codes. SAE controlled codes must be set as prescribed by the SAE, while Manufacturer controlled codes can be set freely by a manufacturer within the prescribed limits (See page AX-35).

(e) The diagnosis system operates in "normal mode"

during the normal vehicle use. In normal mode, "2trip detection logic" is used to ensure accurate detection of malfunction. "Check mode" is also available to technicians as an option. In check mode, "1-trip detection logic" is used for simulating malfunction symptoms and increasing the system's ability to detect malfunctions, including intermittent malfunction.

(f) *2 trip detection logic: When a malfunction is first

detected, the malfunction is temporarily stored in the ECM memory (1st trip). IF the ignition switch is turned off and then turned on (IG) again, and same malfunction is detected again, the MIL will illuminate.

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(g) The ECM records vehicle and driving condition

information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

AX–31

DTC set point

0.5 sec.

0.5 sec. 0.5 sec.

Freeze frame data recorded point

D1

12345678

9 10111213141516

DLC3

Terminals of DLC 3

(h) The intelligent tester displays freeze frame data

recorded at five different points: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after the DTC is set. The data can be used to simulate the vehicle's condition around the time of the malfunction. The data may be helpful in determining the cause of a malfunction. It may also be helpful in determining whether a DTC is being caused by a temporary malfunction.

A092901E15

2. INSPECT THE DLC3

(a) The vehicle's ECM uses ISO 15765-4for

communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4format.

A082779E62

Symbol Terminal No. Name Reference Terminal Result Condition

SIL 7 Bus "+" line 5 - Signal ground Pulse generation

CG 4 Chassis ground Body ground Below 1 Ω Always SG 5 Signal ground Body ground Below 1 Ω Always

BAT 16 Battery positive Body ground 11 to 14 V Always

CANH 6 CAN bus line CANL 54 to 69 Ω IG switch OFF*

CANH 6

CANL 14

HIGH-level CAN bus

line

HIGH-level CAN bus

lineCG

LOW-level CAN bus

line

LOW-level CAN bus

line

Battery positive 6 kΩ or higher IG switch OFF*

CG 200 Ω or higher IG switch OF F*

Battery positive 6 kΩ or higher IG switch OFF*

CG 200 Ω or higher IG switch OF F*

During

transmission

CAUTION: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors.

AX

AX–32

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector. HINT: The DLC3 is the interface prepared for reading various data from the vehicle's ECM. After connecting the cable of the intelligent tester to the CAN VIM, turn the ignition switch ON and turn the tester ON. If a communication failure message is displayed on the tester screen (on the tester: UNABLE TO CONNECT TO VEHICLE), a problem exists in either the vehicle or tester. In order to identify the location of the problem, connect the tester to another vehicle.

• If the communication is normal when the tool is connected to another vehicle, inspect the DLC3 on the original vehicle.

• If the communication is still impossible when the tool is connected to another vehicle, the problem is probably in the tool itself, so consult the Service Department listed in the tool's instruction manual.

3. CHECK BATTERY VOLTAGE

(a) Measure the battery voltage.

Battery voltage:

11 to 14 V

If voltage is below 11 V, replace the battery before proceeding.

4. CHECK MIL

(a) Check that the MIL illuminates when turning the

ignition switch on (IG). HINT: If the MIL does not light up, troubleshoot the combination meter.

(b) When the engine is started, the MIL should go of f. If

the lamp remains on, it means that the diagnosis system has detected a malfunction or abnormality in the system.

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC CHECK / CLEAR

1. DTC CHECK (NORMAL MODE) NOTICE: When the diagnostic system is switched from the normal mode to the check mode, all the DTCs and freeze frame data recorded in the normal mode will be erased. So before switching modes, always check the DTCs and freeze frame data, and note them down. DTCs which are stored in the ECM can be displayed with the intelligent tester or generic OBD II scan tool. These scan tools can display pending DTCs and current DTCs. Some DTC aren't stored if the ECM doesn't detect a malfunction during consecutive driving. However, the detected malfunction during once driving is stored as pending DTC.

AX–33

Intelligent Tester

DLC3

CAN VIM

C131977E05

(a) Checking DTCs using the OBD II scan tool or

intelligent tester. (1) Connect the intelligent tester to the Controller

Area Network Vehicle Interface Module (CAN VIM). Then connect the CAN VIM to the Data

Link Connector 3 (DLC3). (2) Turn the ignition switch on (IG). (3) Enter the following menus: DIAGNOSIS /

ENHANCED OBD II / DTC INFO / CURRENT

CODES (or PENDING CODE). (4) Use the OBD II scan tool or intelligent tester to

check the DTCs and freeze frame data and note

them down (For operating instructions, see the

OBD II scan tool's instruction book).

NOTICE:

When simulating symptoms with an OBD II

scan tool (excluding intelligent tester) to

check the DTCs, use the normal mode. For

codes on the DTCs chart which are subject

to "2 trip detection logic",

Turn the engine switch off after the symptom is

simulated once. Then repeat the simulation

process again. When the problem has been

simulated twice, the MIL illuminates and the

DTCs are recorded in the ECM.

2. DTC CLEAR

(a) Connect the intelligent tester to the CAN VIM. Then

connect the CAN VIM to the DLC3.

(b) Turn the ignition switch on (IG). (c) Enter the following menus: DIAGNOSIS /

ENHANCED OBD II / DTC INFO / CLEAR CODES and press YES.

AX

AX–34

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK MODE PROCEDURE

HINT: Check mode has a higher sensitivity to malfunctions and can detect malfunction that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1-trip detection logic.

1. DTC CHECK (CHECK MODE)

HINT: Intelligent tester only: Compared to the normal mode, the check mode is more sensitive for detecting malfunctions. Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the check mode.

AX

Intelligent Tester

DLC3

CAN VIM

0.13 sec. 0.13 sec.

ON

OFF

C131977E05

BR03904E17

(a) Procedure for Check Mode using the intelligent

tester. (1) Check the initial conditions.

• Battery positive voltage 11 V or more

• Throttle valve fully closed

• Transaxle in the P or N position

• A/C switch is off (2) Turn the ignition switch off. (3) Connect the intelligent tester together with the

Controller Area Network Vehicle Interface Module (CAN VIM) to the DLC3.

(4) Turn the ignition switch on (IG) and turn the

intelligent tester main switch on.

(5) Select the item "DIAGNOSIS/ENHANCED OBD

II/CHECK MODE" (Check that the MIL flashes).

NOTICE: All DTCs and freeze frame data recorded will be erased if: 1) the intelligent tester is used to change the ECM from normal mode to check mode or vice-versa; or 2) during check mode, the ignition switch is turned from the on (IG) to ACC position or turned OFF.

(6) Start the engine (the MIL goes off after the

engine starts).

(7) Perform "MONITOR DRIVE PATTERN" for the

ECT test (See page AX-17). (Or, simulate the conditions of the malfunction described by the customer).

NOTICE: Leave the ignition switch on (IG) until you have checked the DTCs, etc.

(8) After simulating malfunction conditions, use the

intelligent tester diagnosis selector to check the DTCs and freeze frame data, etc.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(9) When you use intelligent tester: Select the item

"DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(10)After checking the DTC, inspect the applicable

circuit.

(11)(See page AX-35) to confirm the details of the

DTCs.

2. DTC CLEAR

(a) Connect the intelligent tester to the CAN VIM. Then

connect the CAN VIM to the DLC3. (b) Turn the ignition switch on (IG). (c) Enter the following menus: DIAGNOSIS /

ENHANCED OBD II / DTC INFO / CLEAR CODES

and press YES.

AX–35

AX

AX–36

Normal

SL1

Malfunction

(During driving

at 1st or 2nd)

SL1

Malfunction

(During driving

at 3rd)

SL1

Malfunction

(During driving

at 4th or 5th)

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

FAIL-SAFE CHART

1. FAIL-SAFE

This function minimizes the loss of the ECT functions when any malfunction occurs in a sensor or solenoid. (a) ATF (Automatic Transmission Fluid) temperature

sensor: When the ATF temperature sensor has a malfunction, 5th upshift is prohibited.

(b) Counter gear speed sensor NC (Speed sensor NC):

When the counter gear speed sensor has a malfunction, 5th upshift is prohibited.

(c) Shift solenoid valve DSL:

When the solenoid valve DSL has a malfunction, the current to the solenoid valve is stopped. This stops lock-up control, then fuel economy decreases.

(d) Shift solenoid valve SL1, SL2, SL3 and S4:

Fail safe function: If either of the shift solenoid valve circuits develops an open or short, the ECM turns the other shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table below. Manual shifting as shown in the following table must be done (In case of a short circuit, the ECM stops sending the current to the short circuited solenoid). Even if starting the engine in the fail-safe mode, the gear position remains in the same position. HINT: FL: Flex Lock-up

SL1 ON OFF ON OFF OFF

Solenoid Valve

Gear Position 1st 2nd 3rd 4th 5th

Solenoid Valve

Gear Position 1st to 2nd 2nd 3rd to 2nd 4th to 2nd 5th to 2nd

Solenoid Valve

Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th

Solenoid Valve

Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th

SL2 ON ON OFF FL FL SL3 OFF OFF OFF ON ON

S4 OFF OFF OFF OFF ON

SL1 OFF SL2 ON ON OFF to ON FL to ON FL to ON SL3 OFF OFF OFF ON to OFF ON to OFF

S4 OFF OFF OFF OFF ON to OFF

SL1 OFF SL2 ON to FL ON to FL OFF to FL FL FL SL3 OFF OFF OFF ON to FL ON to FL

S4 OFF to ON OFF to ON OFF to ON OFF to ON ON

SL1 OFF SL2 ON to FL ON to FL OFF to FL FL FL SL3 OFF to ON OFF to ON OFF to ON ON ON

S4 OFF OFF OFF OFF ON

SL2

Malfunction

SL3

Malfunction

S4 Malfunction

SL1, SL2, SL3,

and S4

Malfunction

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SL1 ON OFF to ON ON OFF to ON OFF to ON

Solenoid Valve

Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th

Solenoid Valve

Gear Position 1st 2nd 3rd 4th 5th to 4th

Solenoid Valve

Gear Position 1st 2nd 3rd 4th 5th to 4th

Solenoid Valve

Gear Position 1st to 4th 2nd to 4th 3rd to 4th 4th 5th to 4th

SL2 OFF SL3 OFF OFF OFF ON to OFF ON to OFF

S4 OFF to ON OFF to ON OFF to ON OFF to ON ON

SL1 ON OFF ON OFF to ON OFF to ON SL2 ON ON OFF FL FL SL3 OFF

S4OFFOFFOFFOFF to ONON

SL1 ON OFF ON OFF OFF SL2 ON ON OFF FL FL SL3 OFF OFF OFF ON ON

S4 OFF

SL1 OFF SL2 OFF SL3 OFF

S4 OFF

AX–37

AX

AX–38

Item

STOP LIGHT SW

PNP SW [NSW]

REVERSE

DRIVE

2ND

LOW

4TH/DRIVE

3RD

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DATA LIST / ACTIVE TEST

1. DATA LIST

HINT: According to the DATA LIST displayed by the intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the intelligent tester together with the CAN

VIM (controller area network vehicle interface

module) to the DLC3. (d) Turn the ignition switch to the on position. (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT /

DATA LIST". (g) According to the display on the tester, read the

"DATA LIST".

Measurement Item/ Range (display)

Stop light switch Status/ ON or OFF

PNP switch Status/ ON or OFF

PNP SW Status/ ON or OFF

Normal Condition Diagnostic Note

• Brake Pedal is depressed: ON

• Brake Pedal is released: OFF

When the shift lever position displayed on the Intelligent tester

differs from the actual position, Shift lever position is; P and N: ON Except P and N: OFF

Shift lever position is; R: ON Except R: OFF

Shift lever position is; D and 4 : ON Except D and 4: OFF

Shift lever position is; 2 and L : ON Except 2 and L: OFF

Shift lever position is; L : ON Except L: OFF

Shift lever position is; 4 : ON Except 4: OFF

Shift lever position is; 3 : ON Except 3: OFF

adjustment of the PNP switch or

the shift cable may be incorrect.

HINT:

When the failure still occurs even

after adjusting these parts, See

page AX-39.

-

↑

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–39

Item

SHIFT

LOCK UP SOL

SOLENOID (SLT)

AT FLUID TEMP

SPD (NC)

Measurement Item/ Range (display)

Actual Gear Position/ 1st, 2nd, 3rd, 4th or 5th (O/D)

Lock Up Solenoid Status/ ON or OFF

Shift Solenoid SLT Status/ ON or OFF

ATF Temp. Sensor Value/ min.: -40°C (-40°F) max.: 215°C (419°F)

Counter Gear Speed/ display: 50 r/min

Normal Condition Diagnostic Note

Shift Lever Position is;

•L: 1st

• 2: 1st or 2nd

• 3: 1st, 2nd or 3rd

• 4: 1st, 2nd, 3rd or 4th

• D (O/D ON): 1st, 2nd, 3rd, 4th or 5th

• Lock Up: ON

• Except Lock Up: OFF

• Accelerator pedal is depressed: OFF

• Accelerator pedal is released: ON

• After Stall Test; Approx. 80°C (176°F)

• Equal to ambient temperature when cold soak

HINT: 3rd when shift lever position is D position (After warming up the engine);

• Intermediate shaft speed (NC) becomes close to the engine speed.

If the value is "-40°C (-40°F)" or

"215°C (419°F)", ATF temp.

sensor circuit is opened or

shorted.

2. ACTIVE TEST

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST. (a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the intelligent tester together with the CAN

VIM (controller area network vehicle interface

module) to the DLC3. (d) Turn the ignition switch to the ON position. (e) Push the "ON" button of the intelligent tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT /

ACTIVE TEST". (g) According to the display on tester, perform the

"ACTIVE TEST".

Item Test Details Diagnostic Note

[Test Details] Operate the shift solenoid valve and set the each shift position by yourself.

SHIFT

[Vehicle Condition]

•IDL: ON

• Less than 50 km/h (31 mph) [Others]

• Press "→" button: Shift up

• Press "←" button: Shift down

Possible to check the operation of the shift solenoid valves.

-

AX

AX–40

Item Test Details Diagnostic Note

LOCK UP

SOLENOID (SL1)

SOLENOID (SL2)

SOLENOID (SL3)

SOLENOID (S4)

SOLENOID (SR)

SOLENOID (DSL)

SOLENOID (SLT)

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

[Test Details] Control the shift solenoid DSL to set the automatic transaxle to the lock-up condition. [Vehicle Condition]

• Vehicle Speed: 60 km/h (37 mph) or more

[Test Details] Operate the shift solenoid SL1 [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid SL2 [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid SL3 [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid S4 [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid SR [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid DSL [Vehicle Condition]

• Vehicle Stopped.

• Shift lever P or N position [Test Details]

Operate the shift solenoid SLT and raise the line pressure. [Vehicle Condition]

*

• Vehicle Stopped.

•IDL: ON HINT: OFF: Line pressure up (When the active test of "SOLENOID (SLT)" is performed, the ECM commands the SLT solenoid to turn off). ON: No action (normal operation)

Possible to check the DSL operation.

-

AX

*

: "SOLENOID (SLT)" in the ACTIVE TEST is performed to check the line pressure changes by connecting the SST to the automatic transaxle, which is used in the HYDRAULIC TEST (See page

AX-14) as well.

HINT: The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DIAGNOSTIC TROUBLE CODE CHART

If a DTC is displayed during the DTC check, check the parts listed in the table below and proceed to the page given. HINT:

• *1: Comes on MIL (Malfunction Indicator Lamp) light up

• *2: "DTC stored" mark means ECM memorizes the malfunction code if the ECM detects the DTC detection condition.

• This DTC may be output when the clutch, brake and gear components etc. inside the automatic transmission are damaged.

AUTOMATIC TRANSMISSION SYSTEM

DTC No. Detection Item Trouble Area MIL *1 Memory *2 See page

P0705 Transmission Range

Sensor Circuit Malfunction (PRNDL Input)

P0710 Transmission Fluid

Temperature Sensor "A" Circuit

P0711 Transmission Fluid

Temperature Sensor "A" Performance

P0712 Transmission Fluid

Temperature Sensor "A" Circuit Low Input

P0713 Transmission Fluid

Temperature Sensor "A" Circuit High Input

P0717 Turbine Speed

Sensor Circuit No Signal

P0724 Brake Switch "B"

Circuit High

1. Open or short in park/neutral position switch circuit

2. Park/neutral position switch

3. ECM

1. Open or short in ATF temperature sensor circuit

2. Transmission wire (ATF temperature sensor)

3. ECM

1. Transmission wire (ATF temperature sensor)

1. Short in ATF temperature sensor circuit

2. Transmission wire (ATF temperature sensor)

3. ECM

1. Open in ATF temperature sensor circuit

2. Transmission wire (ATF temperature sensor)

3. ECM

1. Open or short in transmission revolution sensor NT (speed sensor NT) circuit

2. Transmission revolution sensor NT (speed sensor NT)

3. ECM

4. Automatic transaxle assembly

1. Short in stop light switch circuit

2. Stop light switch

3. ECM

Comes on DTC stored AX-39

Comes on DTC stored AX-48

Comes on DTC stored AX-53

Comes on DTC stored AX-48

Comes on DTC stored AX-57

Comes on DTC stored AX-60

AX–41

AX

AX–42

DTC No. Detection Item Trouble Area MIL *1 Memory *2 See page

P0741 Torque Converter

P0746 Pressure Control

P0748 Pressure Control

P0766 Shift Solenoid "D"

P0771 Shift Solenoid "E"

P0776 Pressure Control

P0778 Pressure Control

P0793 Intermediate Shaft

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Comes on DTC stored AX-63

Comes on DTC stored AX-69

Comes on DTC stored AX-73

Comes on DTC stored AX-77

Comes on DTC stored AX-81

Comes on DTC stored AX-85

Comes on DTC stored AX-90

Comes on DTC stored AX-94

Clutch Solenoid Performance (Shift Solenoid Valve DSL)

Solenoid "A" Performance (Shift Solenoid Valve SL1)

Solenoid "A" Electrical (Shift Solenoid Valve SL1)

Performance (Shift Solenoid Valve S4)

Performance (Shift Solenoid Valve SR)

Solenoid "B" Performance (Shift Solenoid Valve SL2)

Solenoid "B" Electrical (Shift Solenoid Valve SL2)

Speed Sensor "A"

1. Shift solenoid valve DSL remains open or closed

2. Valve body is blocked

3. Torque converter clutch

4. Automatic transaxle (clutch, brake or gear etc.)

5. Line pressure is too low

1. Shift solenoid valve SL1 remains open or closed

2. Valve body is blocked

3. Automatic transaxle (clutch, brake or gear etc.)

1. Open or short in shift solenoid valve SL1 circuit

2. Shift solenoid valve SL1

3. ECM

1. Shift solenoid valve S4 remains open or closed

2. Valve body is blocked (Brake control valve)

3. Automatic transmission (clutch, brake or gear, etc.)

1. Shift solenoid valve SR remains open or closed

2. Valve body is blocked

3. Automatic transaxle (clutch, brake or gear etc.)

1. Shift solenoid valve SL2 remains open or closed

2. Valve body is blocked

3. Automatic transaxle (clutch, brake or gear etc.)

1. Open or short in shift solenoid valve SL2 circuit

2. Shift solenoid valve SL2

3. ECM

1. Open or short in transmission revolution sensor NC (speed sensor NC) circuit

2. Transmission revolution sensor NC (speed sensor NC)

3. ECM

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC No. Detection Item Trouble Area MIL *1 Memory *2 See page

P0796 Pressure Control

Solenoid "C" Performance (Shift Solenoid Valve SL3)

P0798 Pressure Control

Solenoid "C" Electrical (Shift Solenoid Valve SL3)

P0982 Shift Solenoid "D"

Control Circuit Low (Shift Solenoid Valve S4)

P0983 Shift Solenoid "D"

Control Circuit High (Shift Solenoid Valve S4)

P0985 Shift Solenoid "E"

Control Circuit Low (Shift Solenoid Valve SR)

P0986 Shift Solenoid "E"

Control Circuit High (Shift Solenoid Valve SR)

P2714 Pressure Control

Solenoid "D" Performance (Shift Solenoid Valve SLT)

P2716 Pressure Control

Solenoid "D" Electrical (Shift Solenoid Valve SLT)

P2769 Torque Converter

Clutch Solenoid Circuit Low (Shift Solenoid Valve DSL)

P2770 Torque Converter

Clutch Solenoid Circuit High (Shift Solenoid Valve DSL)

1. Shift solenoid valve SL3 remains open or closed

2. Valve body is blocked

3. Automatic transaxle (clutch, brake or gear etc.)

1. Open or short in shift solenoid valve SL3 circuit

2. Shift solenoid valve SL3

3. ECM

1. Short in shift solenoid valve S4 circuit

2. Shift solenoid valve S4

3. ECM

1. Open in shift solenoid valve S4 circuit

2. Shift solenoid valve S4

3. ECM

1. Short in shift solenoid valve SR circuit

2. Shift solenoid valve SR

3. ECM

1. Open in shift solenoid valve SR circuit

2. Shift solenoid valve SR

3. ECM

1. Shift solenoid valve SLT remains closed

2. Valve body is blocked

3. Automatic transaxle (clutch, brake or gear etc.)

1. Open or short in shift solenoid valve SLT circuit

2. Shift solenoid valve SLT

3. ECM

1. Short in shift solenoid valve DSL circuit

2. Shift solenoid valve DSL

3. ECM

1. Open in shift solenoid valve DSL circuit

2. Shift solenoid valve DSL

3. ECM

Comes on DTC stored AX-98

Comes on DTC stored AX-102

Comes on DTC stored AX-106

Comes on DTC stored AX-109

Comes on DTC stored AX-112

Comes on DTC stored AX-116

Comes on DTC stored AX-120

AX–43

AX

AX–44

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0705

Transmission Range Sensor Circuit Malfunction (PRNDL Input)

DESCRIPTION

The park/neutral position switch detects the shift lever position and sends signals to the ECM.

DTC No. DTC Detection Condition Trouble Area

(A) Any 2 or more signals of the following are ON simultaneously (2-trip detection logic)

• P input signal is ON.

• N input signal is ON.

• R input signal is ON.

• D input signal is ON.

• 3 input signal is ON.

• 2 input signal is ON. (B) Any 2 or more signals of the following are ON simultaneously (2-trip detection logic)

• NSW input signal is ON.

P0705

• R input signal is ON.

• D input signal is ON.

• 3 input signal is ON.

• 2 input signal is ON. (C) All switches are OFF simultaneously for NSW, P, R, N, D, 3 and 2 positions (2-trip detection logic). (D) Both 1 and 2 are met (2-trip detection logic)

1. One of the following is met (a) NSW input signal is ON. (b) P input signal is ON. (c) N input signal is ON. (d) R input signal is ON

2. One of the following is met (a) 4 input signal is ON. (b) L input signal is ON.

• Open or short in park / neutral position switch circuit

• Park / neutral position switch

•ECM

AX

MONITOR DESCRIPTION

These DTCs indicate a problem with the park/neutral position switch and the wire harness in the park/ neutral position switch circuit. The park/neutral position switch detects the shift lever position and sends a signal to the ECM. For security, the park/neutral position switch detects the shift lever position so that engine can be started only when the shift lever is in the P or N position The park/neutral position switch sends a signal to the ECM according to the shift position (P, R, N or D). The ECM determines that there is a problem with the switch or related parts if in receives more than 1 position signal simultaneously. The ECM will turn on the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs P0705: Park/neutral position switch/Verify switch input

Required sensors/Components Park/neutral position switch

Frequency of operation Continuous

Duration 2 sec.

MIL operation 2 driving cycles

Sequence of operation None

TYPICAL ENABLING CONDITIONS

All:

The monitor will run whenever this DTC is not present. None Ignition switch ON Battery voltage 10.5 V or more

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TYPICAL MALFUNCTION THRESHOLDS

1. One of the following conditions is met: Condition (A), (B), (C) and (D) Condition (A)

If 2 or more of the following signal outputs exist at the same time

P switch ON N switch ON R switch ON D switch ON 3 switch ON 2 switch ON

Condition (B)

If 2 or more of the following signal outputs exist at the same time

NSW switch ON R switch ON D switch ON 3 switch ON 2 switch ON

AX–45

Condition (C)

All of following conditions are met

NSW switch OFF P switch OFF N switch OFF R switch OFF D switch OFF 3 switch OFF 2 switch OFF

Condition (D)

Both (i) and (ii) are met (i) One of the following is met

NSW switch ON P switch ON N switch ON R switch ON

(ii) One of the following is met

4 switch ON L switch ON

COMPONENT OPERATING RANGE

Park/neutral Position switch The park/neutral position switch sends only one signal to the ECM.

AX

AX–46

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

WIRING DIAGRAM

To ST Relay

C1 Park / Neutral Position Switch

N

5

RB

2

P

4

LL

8

2L

3

DL

7

51

NSSL NSSD

AT4

ATL

ECM

48

A24

STA

52

NSW

C24

55

C24

2

26

3

A24

56

D

C24

25

A24

74

C24

4

L

2

6

FL MAIN

Battery

NL

9

RL

1

PL

6

GAUGE No. 1

ALT

E31 Transmission Control Switch

AM1

4112

E23 Ignition Switch

IG1

54

C24

53

C24

73

C24 P

IG1

N

R

35

C125005E01

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–47

INSPECTION PROCEDURE

HINT: According to the DATA LIST displayed by the intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

NOTICE: In the table below , the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

1. READ DATA LIST

(a) Turn the ignition switch off. (b) Connect the intelligent tester together with the CAN VIM (controller area network vehicle

interface module) to the DLC3. (c) Turn the ignition switch on (IG). (d) Turn on the tester. (e) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST". (f) According to the display on the tester, read the "DATA LIST".

Item

PNP SW [NSW] PNP SW Status / ON or OFF

REVERSE PNP SW Status / ON or OFF

DRIVE PNP SW Status / ON or OFF

2ND PNP SW Status / ON or OFF

LOW PNP SW Status / ON or OFF

4TH/DRIVE PNP SW Status / ON or OFF

3RD PNP SW Status / ON or OFF

Measurement Item / Range

(Display)

Normal Condition Diagnostic Note

When the shift lever position Shift lever position is; P and N: ON Except P or N: OFF

Shift lever position is; R: ON Except R: OFF

Shift lever position is; D and 4: ON Except D and 4: OFF

Shift lever position is; 2 and L: ON Except 2 and L: OFF

Shift lever position is; L: ON Except L: OFF

Shift lever position is; 4: ON Except 4: OFF

Shift lever position is; 3: ON Except 3: OFF

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

When the shift lever position

displayed on the intelligent tester

differs from the actual position, adjustment of the PNP switch or the shift cable may be incorrect.

AX

AX–48

1

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION)

Wire Harness Side:

(Connector Front View):

C1

12

OK

CHECK HARNESS AND CONNECTOR (OUTPUT SIGNAL)

2

Wire Harness Side:

(Connector Front View):

34

98765

RB

B

C117645E06

(a) Disconnect the park/neutral position switch connector. (b) Turn the ignition switch on (IG). (c) Measure voltage according to the value(s) in the table

below.

Standard voltage

Tester Connection Specified Condition

2 - Body ground 10 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Turn the ignition switch on (IG). (b) Measure voltage according to the value(s) in the table

below.

Standard voltage

Tester Connection Specified Condition

4 - Body ground 10 to 14 V

AX

C1

OK

12

34

98765

C117645E07

NG

Go to step 8

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY

3

Switch Side:

(Connector Front View):

C1

C110340E34

AX–49

(a) Measure resistance according to the value(s) in the t able

below when the shift lever is moved to each position.

Standard resistance

Shift Position Tester Connection Specified Condition

P

Except P 10 kΩ or higher

R

Except R 10 kΩ or higher

N

Except N 10 kΩ or higher

D and 4

Except D and 4 10 kΩ or higher

3

Except 3 10 kΩ or higher

2 and L

Except 2 and L 10 kΩ or higher

2 - 6 and 4 - 5

2 - 1

2 - 9 and 4 - 5

2 - 7

2 - 3

2 - 8

Below 1 Ω

OK

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

4

Wire Harness Side:

(Connector Front View):

ECM

RN2 P D

C24

NG

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

(a) Connect the park/neutral position switch connector. (b) Disconnect the ECM connectors. (c) Turn the ignition switch on (IG), and measure the voltage

according to the value(s) in the table below when the shift lever is moved to each position.

A24

3

C136857E03

AX

AX–50

Standard voltage

Shift Position Tester Connection Specified Condition

P

Except P Below 1 V

N

Except N Below 1 V

R

Except R Below 1 V

D and 4

Except D and 4 Below 1 V

3

Except 3 Below 1 V

2 and L

Except 2 and L Below 1 V

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

C24-73 (P) - Body ground

C24-54 (N) - Body ground

C24-53 (R) - Body ground

C24-56 (D) - Body ground

A24-26 (3) - Body ground

C24-55 (2) - Body ground

10 to 14 V

HINT:

*

: The voltage will drop slightly due to lighting up of the

back up light.

*

OK

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH -

5

TRANSMISSION CONTROL SWITCH)

Wire Harness Side:

(Connector Front View):

E31

C110345E17

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the transmission control switch connector of

shift lock control unit assembly.

(b) Measure the voltage according to the value(s) in the

table below when the shift lever is moved to each position.

Standard voltage

Shift Position Tester Connection Specified Condition

D and 4

Except D and 4 Below 1 V

2 and L

Except 2 and L Below 1 V

NG

REPAIR OR REPLACE HARNESS OR

1 - Body ground

5 - Body ground

10 to 14 V

CONNECTOR

AX

OK

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT TRANSMISSION CONTROL SWITCH

6

Switch Side:

(Connector Front View):

E31

AX–51

(a) Measure the resistance according to the value(s) in the

table below when the shift lever is moved to each position.

Standard resistance

Shift Position Tester Connection Specified Condition

4 and 3

Except 4 and 3 10 kΩ or higher

L

Except L 10 kΩ or higher

1 - 2

5 - 6

Below 1 Ω

OK

CHECK HARNESS AND CONNECTOR (TRANSMISSION CONTROL SWITCH - ECM)

7

Wire Harness Side:

(Connector Front View):

ECM

NG

REPLACE TRANSMISSION CONTROL SWITCH

C136860E01

(a) Connect the transmission control switch connector of

shift lock control unit assembly.

C24

(b) Turn the ignition switch to the ON position, an d measure

the voltage according to the value(s) in the table below when the shift lever is moved to each position.

L

A24

Standard voltage

Shift Position Tester Connection Specified Condition

4

Except 4 Below 1 V

L

Except L Below 1 V

4

C136857E02

A24-25 (4) - Body ground

C24-74 (L) - Body ground

10 to 14 V

AX

AX–52

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

OK

REPLACE ECM

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM)

8

Wire Harness Side:

(Connector Front View):

Park/Neutral Position Switch

C1

ECM

12

56 789

C24

34

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

(a) Disconnect the ECM connectors. (b) Turn the ignition switch off. (c) Measure resistance according to the value(s) in the table

below.

Standard resistance (Check for open)

Tester Connection Specified Condition

B (C1-4) - NSW (C24-52) Below 1 Ω

Standard resistance (Check for short)

Tester Connection Specified Condition

B

B (C1-4) or NSW (C24-52) - Body

ground

NG

REPAIR OR REPLACE HARNESS OR

10 kΩ or higher

CONNECTOR

AX

OK

REPLACE ECM

NSW

C136861E02

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–53

DTC P0710

Transmission Fluid Temperature Sensor "A" Circuit

Transmission Fluid Temperature Sensor "A"

DTC P0712

Circuit Low Input Transmission Fluid Temperature Sensor "A"

DTC P0713

Circuit High Input

DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM. The ECM applies a voltage to the temperature sensor through ECM terminal THO1. The sensor resistance changes with the transmission fluid temperature. As the temperature becomes higher, the sensor resistance decreases. One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down as the temperature becomes higher. The ECM calculates the fluid temperature based on the voltage signal.

Resistance

Acceptable

Temperature

G031389E12

DTC No. DTC Detection Condition Trouble Area

(a) and (b) are detected momentarily within 0.5 sec. when

P0710

P0712

neither P0712 nor P0713 is detected (1-trip detection logic) (a) ATF temperature sensor resistance is less than 79 Ω. (b) ATF temperature sensor resistance is more than 156 kΩ. HINT: Within 0.5 sec., the malfunction switches from (a) to (b) or from (b) to (a)

ATF temperature sensor resistance is less than 79 Ω for 0.5 sec. or more (1-trip detection logic)

• Open or short in ATF temperature sensor circuit

• Transmission wire (ATF temperature sensor)

•ECM

• Short in ATF temperature sensor circuit

• Transmission wire (ATF temperature sensor)

•ECM

AX

AX–54

DTC No. DTC Detection Condition Trouble Area

P0713

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

ATF temperature sensor resistance is more than 156 kΩ when 15 minutes or more have elapsed after the engine start DTC is detected for 0.5 sec. or more (1-trip detection logic)

• Open in ATF temperature sensor circuit

• Transmission wire (ATF temperature sensor)

•ECM

MONITOR DESCRIPTION

These DTCs indicate an open or short in the automatic transmission fluid (ATF) temperature sensor (TFT sensor) circuit. The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an opens or shorts in the ATF temperature circuit. If the resistance value of the ATF

*1

temperature is less than 79 Ω

or more than 156 kΩ *2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC. *1: 150°C (302°F) or more is indicated regardless of the actual ATF temperature. *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature. HINT: The ATF temperature can be checked on the intelligent tester display.

MONITOR STRATEGY

Related DTCs

Required sensors/Components ATF temperature sensor (TFT sensor)

Frequency of operation Continuous

Duration 0.5 sec.

MIL operation Immediate

Sequence of operation None

P0710: ATF temperature sensor/Range check (Chattering) P0712: ATF temperature sensor/Range check (Low resistance) P0713: ATF temperature sensor/Range check (High resistance)

TYPICAL ENABLING CONDITIONS

P0710: Range check (Chattering) P0712: Range check (Low resistance)

The monitor will run whenever these DTCs are not present. None The typical enabling condition is not available. -

P0713: Range check (High resistance)

The monitor will run whenever this DTC is not present. None Time after engine start 15 min. or more

TYPICAL MALFUNCTION THRESHOLDS

P0710: Range check (Chattering)

Less than 79 Ω

TFT (Transmission fluid temperature) sensor resistance

or

More than 156 kΩ

AX

P0712: Range check (Low resistance)

TFT sensor resistance Less than 79 Ω

P0713: Range check (High resistance)

TFT sensor resistance More than 156 kΩ

COMPONENT OPERATING RANGE

TFT sensor. Atmospheric temperature to approx. 130°C (266°F)

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

WIRING DIAGRAM

C25 Electronically Controlled Transmission Solenoid

AX–55

ECM

1

THO

7

E2

C

72

C24

95

C24

THO1

ETHO

C131059E04

INSPECTION PROCEDURE

HINT: According to the DAT A LIST disp layed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor , actuator and so on without p arts removal. Reading the DATA LIST as the first ste p of troubleshooting is one method to shorten labor time.

NOTICE: In the table below , the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

1. READ DATA LIST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle

interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST". (g) According to the display on the tester, read the "DATA LIST".

Item

AT FLUID TEMP

Measurement Item/

Range (display)

ATF Temp. Sensor Value/

min.: -40°C (-40°F)

max.: 215°C (419°F)

Approx. 80°C (176°F) (After Stall Test)

Normal Condition

HINT:

When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150°C (302°F),

there is a short circuit.

When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40°C (-40°F),

there is an open circuit.

AX

AX–56

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Measure the resistance between terminal THO1 (THO) and body ground.

Temperature Displayed Malfunction

150°C (302°F) or more Short circuit

HINT: If a circuit related to the ATF temperature sensor become open, P0713 is immediately set (in 0.5 second). When P0713 is set, P0711 cannot be detected. It is not necessary to inspect the circuit when P0711 is set.

INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

1

Transmission Wire Side:

(Connector Front View):

C25

-40°C (-40°F) Open circuit

(a) Disconnect the transmission wire connector from the

transaxle.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

THO

Tester Connection Specified Condition

1 (THO) - 7 (E2) 79 Ω to 156 kΩ

1 (THO) - Body ground 10 kΩ or higher

7 (E2) - Body ground 10 kΩ or higher

OK

E2

C113969E24

HINT: If the resistance is out of the specified range with either the ATF temperature shown in the table below, the driveability of the vehicle may decrease.

ATF Temperature Specified Condition

20°C (68°F) 3 to 5 kΩ

110°C (230°F) 0.22 to 0.28 kΩ

NG

REPAIR OR REPLACE TRANSMISSION WIRE

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

2

AX–57

Wire Harness Side:

(Connector Front View):

ECM

THO1

ETHO

OK

C24

A136781E01

(a) Connect the transmission wire connector to the

transaxle. (b) Disconnect the ECM connectors. (c) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection Specified Condition

C24-72 (THO1) - C24-95 (ETHO) 79 Ω to 156 kΩ

(d) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition C24-72 (THO1) - Body ground C24-95 (ETHO) - Body ground

NG

REPAIR OR REPLACE HARNESS OR

10 kΩ or higher

CONNECTOR

REPLACE ECM

AX

AX–58

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0711

Transmission Fluid Temperature Sensor "A" Performance

DESCRIPTION

The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance value which is input into the ECM.

DTC No. DTC Detection Condition Trouble Area

(A) Both (a) and (b) are detected: (2-trip detection logic) (a) Intake air and engine coolant temperatures are more than 10°C (14°F) at engine start

P0711

(b) After normal driving for over 19 min. and 9 km (6 mile) or more, ATF temp. is less than 20°C (68°F) (B) When engine coolant temp. is less that 35°C (95°F) at engine start, the ATF temp. is 110°C (230°F) or more after 17 min. of engine start (2-trip detection logic).

MONITOR DESCRIPTION

The ATF temperature sensor converts the ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature and detects an open or short in the ATF temperature circuit or a fault in the ATF temperature sensor. After running the vehicle for a certain period, the ATF temperature should increase. If the ATF temperature is below 20°C (68°F) after running the vehicle for a certain perio d, the ECM interpret s this as a fault, and turns on the MIL. When the ATF temperature is 110°C (230°F) or more after 17 minutes of engine cold start, the ECM also determines this as a fault, turns on the MIL, and stores the DTC.

Transmission wire (ATF temperature sensor)

AX

MONITOR STRATEGY

Related DTCs P0711: ATF temperature sensor/Rationality check

Required sensors/Components ATF temperature sensor (TFT sensor)

Frequency of operation Continuous

Duration

MIL operation 2 driving cycles

Sequence of operation None

3 sec.: Condition (A) 10 sec.: Condition (B)

TYPICAL ENABLING CONDITIONS

All:

The monitor will run whenever this DTC is not present. None Time after engine start 16 min. and 40 sec. or more ECT (Engine coolant temperature) -15°C (5°F) or more ATF sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction IAT sensor circuit Not circuit malfunction ETCS Not circuit malfunction

Condition (A):

Time After engine start 18 min. and 20 sec. Driving distance after engine start 9 km (5.6 mile) or more IAT (Intake air temperature) (12 sec. after starting engine) -10°C (14°F) or more ECT (12 sec. after starting engine) -10°C (14°F) or more

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Condition (B):

ECT (Current temperature) 60°C (140°F) or more ECT (12 sec. after engine start) Less than 35°C (95°F)

TYPICAL MALFUNCTION THRESHOLDS

Condition (A):

ATF temperature sensor Less than 20°C (68°F)

Condition (B):

ATF temperature sensor 110°C (230°F) or more

COMPONENT OPERATING RANGE

ATF temperature sensor Atmospheric temperature to approx. 130°C (266°F)

WIRING DIAGRAM

C25 Electronically Controlled Transmission Solenoid

AX–59

ECM

1

THO

7

E2

C

72

C24

95

C24

THO1

ETHO

C131059E04

INSPECTION PROCEDURE

HINT: According to the DAT A LIST disp layed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor , actuator and so on without p arts removal. Reading the DATA LIST as the first ste p of troubleshooting is one method to shorten labor time.

NOTICE: In the table below , the value listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether apart is faulty or not.

1. READ DATA LIST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle

interface module) to the DLC3.

AX

AX–60

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST". (g) According to the display on the tester, read the "DATA LIST".

Item

AT FLUID TEMP

Measurement Item/

Range (display)

ATF Temp. Sensor Value/

min.: -40°C (-40°F)

max.: 215°C (419°F)

Normal Condition

Approx. 80°C (176°F) (After Stall

HINT: When DTC P0712 is output and OBD II scan tool or intelligent tester output is 150°C (302°F), there is a short circuit. When DTC P0713 is output and OBD II scan tool or intelligent tester output is -40°C (-40°F), there is an open circuit. Measure the resistance between terminal THO1 (THO) and body ground.

Temperature Displayed Malfunction

-40°C (-40°F) Open circuit

150°C (302°F) or more Short circuit

HINT: If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately set (in

0.5 second). When P0713 is set, P0711 cannot be detected. It is not necessary to inspect the circuit when P0711 is set.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0711)

1

Test)

AX

Result

A

2

(a) Connect the OBD II scan tool or the intelligent tester to

the DLC3.

(b) Turn the ignition switch o n (IG) and push the OBD II scan

tool or the intelligent tester main switch ON.

(c) When you use intelligent tester:

Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Display (DTC output) Proceed to

Only "P0711" is output A

"P0711" and other DTCs B

HINT: If any other codes besides "P0711" are output, perform troubleshooting for those DTCs first.

B

CHECK TRANSMISSION FLUID LEVEL

OK:

Automatic transmission fluid level is correct.

GO TO DTC CHART

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–61

NG

OK

REPLACE TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

ADD FLUID

AX

AX–62

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0717 Turbine Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

DTC No. DTC Detection Condition Trouble Area

• Open or short in transmission revolution sensor NT (speed sensor NT) circuit

• Transmission revolution sensor NT (speed sensor NT)

•ECM

• Automatic transaxle assembly

5 V/DIV

P0717

ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1-trip detection logic) (a) Vehicle speed: 50 km/h (31 mph) or more (b) Park/neutral position switch (STAR and R) is OFF (c) Speed sensor (NT): less than 300 rpm

0.5 ms/DIV

C053419E01

Reference (Using an oscilloscope): Check the waveform between terminals NT+ and NT- of the ECM connector.

Standard: Refer to the illustration.

Terminal Tool setting Vehicle condition

NT+ - NT- 5 V/DIV, 0.5ms/DIV Vehicle speed 20 km/h (12 mph)

MONITOR DESCRIPTION

The NT terminal of the ECM detects a revolution signal from the speed sensor (NT) (input RPM). The ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC). While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the input shaft

*1

revolution is less than 300 rpm

although the output shaft revolution is more than 1,000 rpm *2, the ECM detects the trouble, illuminates the MIL and stores the DTC. *1: Pulse is not output or is irregularly output. *2: The vehicle speed is 50 km/h (31 mph) or more.

MONITOR STRATEGY

Related DTCs P0717: Speed sensor (NT) / Verify pulse input

Required sensors/Components Speed sensor (NT), Speed sensor (NC)

Frequency of operation Continuous

Duration 5 sec.

MIL operation Immediate

Sequence of operation None

AX

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present.

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Shift change Shift change is completed and before starting next shift change operation ECM selected gear 2nd, 3rd, 4th or 5th Output shaft rpm 1,000 rpm or more NSW switch OFF R switch OFF L switch OFF Engine Running Battery voltage 8 V or more Ignition switch ON Starter OFF

TYPICAL MALFUNCTION THRESHOLDS

Sensor signal rpm Less than 300 rpm

COMPONENT OPERATING RANGE

Speed sensor (NT) Turbine speed is equal to engine speed with lock-up ON

AX–63

WIRING DIAGRAM

C26

Speed Sensor (Tur bine)

12

INSPECTION PROCEDURE

INSPECT SPEED SENSOR INSTALLATION

1

125

C24

124

C24

ECM

NT+

5V

NT-

E1

G031763E44

OK NG

BR03795E36

(a) Check the speed sensor installation.

OK:

The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case.

NG

REPLACE SPEED SENSOR (NT)

AX

AX–64

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

OK

INSPECT SPEED SENSOR (NT)

2

Sensor Side:

(Connector Front View):

C26

(a) Disconnect the speed sensor connector from the

transaxle.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

1 - 2 560 to 680 Ω

Specified Condition

20 °C (68 °F)

2

OK

CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)

3

Wire Harness Side:

(Connector Front View):

ECM

NT- NT+

NG

1

C110343E37

REPLACE SPEED SENSOR (NT)

(a) Connect the speed sensor connector. (b) Disconnect the ECM connector. (c) Measure the resistance according to the value(s) in the

table below.

Standard resistance

C24

Tester Connection

C24-125 (NT+) - C24-124 (NT-) 560 to 680 Ω

Specified Condition

20°C (68°F)

(d) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition

A136781E02

C24-125 (NT+) - Body ground

C24-124 (NT-) - Body ground

10 kΩ or higher

AX

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–65

DTC P0724 Brake Switch "B" Circuit High

DESCRIPTION

The purpose of this circuit is to prevent the engine from stalling while driving in lock-up condition when brakes are suddenly applied. When the brake pedal is depressed, this switch sends a signals to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.

DTC No. DTC Detecting Condition Trouble Area

P0724

The stop light switch remains ON even when the vehicle is driven in a STOP (less than 3 km/h (2 mph) and GO (30 km/h (19 mph) or more) fashion 5 times. (2-trip detection logic).

MONITOR DESCRIPTION

This DTC indicates that the stop light switch remains on. When the stop light switch remains ON during "stop and go" driving, the ECM interprets this as a fault in the stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop (less than 3 km/h (2 mph)) and go (30 km/h (19 mph) or more) 5 times for two driving cycles in order to detect a malfunction.

MONITOR STRATEGY

• Short in stop light switch circuit

• Stop light switch

•ECM

Related DTCs P0724: Stop light switch/Rationality

Required sensors/Components Stop light switch, Vehicle speed sensor

Frequency of operation Continuous

Duration GO and STOP 5 times

MIL operation 2 driving cycles

Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present. None Ignition switch ON Starter OFF Battery voltage 8 V or more GO (Vehicle speed is 30 km/h (18.63 mph) or more) Once STOP (Vehicle speed is less than 3 km/h (1.86 mph)) Once

TYPICAL MALFUNCTION THRESHOLDS

Brake switch Remain ON during GO and STOP 5 times

WIRING DIAGRAM

See page ES-234.

AX

AX–66

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECTION PROCEDURE

READ VALUE OF DATA LIST

1

DATA LIST

Item

STOP LIGHT SW

HINT: According to the DATA LIST displayed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time. (a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the OBD II scan tool or intelligent tester

together with the CAN VIM (controller area network

vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester.. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DA T A

LIST". (g) According to the display on the tester, read the "DATA

LIST".

Measurement Item/

Range (display)

Stop light SW Status/

ON or OFF

• Brake pedal is depressed: ON

• Brake pedal is released: OFF

Normal Condition

NG

INSPECT STOP LIGHT SWITCH ASSEMBLY

2

Free Pushed In

NOTICE:

In the table below, the value listed under "Normal

Condition" are reference values. Do not depend

solely on these reference values when deciding

whether apart is faulty or not.

OK

Go to step 3

(a) Remove the stop light switch assembly.

12

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Switch position Tester Connection Specified Condition

4

3

E065594E45

Switch pin free

Switch pin pushed in 10 kΩ or higher

Switch pin free

Switch pin pushed in Below 1 Ω

1 - 2

3 - 4

Below 1 Ω

10 kΩ or higher

AX

OK

NG

REPLACE STOP LIGHT SWITCH ASSEMBLY

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM)

3

AX–67

Wire Harness Side:

(Connector Front View):

ECM

A24

STP

OK

REPLACE ECM

A115671E29

(a) Install the stop light switch assembly. (b) Measure the voltage according to the value(s) in the

table below when the brake pedal is depressed and released.

Standard voltage

Condition Tester Connection Specified Condition

Brake pedal is

depressed

Brake pedal is released Below 1 V

NG

REPAIR OR REPLACE HARNESS OR

A24-36 (STP) -

Body ground

10 to 14 V

CONNECTOR

AX

AX–68

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0741

T orque Converter Clutch Solenoid Performance (Shift Solenoid Valve DSL)

SYSTEM DESCRIPTION

The ECM uses the signals from the throttle position sensor, air-flow meter, turbine (input) speed sensor, intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condition of the lock-up clutch. Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the ECM memory to detect a mechanical problems of the shift solenoid valve DSL, valve body and torque converter clutch.

DTC No. DTC Detection Co ndS1ition Trouble Area

Lock-up does not occur when driving in the lock-up range

P0741

(normal driving at 80 km/h [50 mph]), or lock up remains ON in the lock-up OFF range. (2-trip detection logic)

MONITOR DESCRIPTION

Torque converter lock-up is controlled by the ECM based on the speed sensor (NT), speed sensor (NC), engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the shift solenoid DSL. When the DSL is turned on, it applies pressure to th e lock-up relay valve and locks the torque converter clutch. If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not requested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system performance. The ECM will turn on the MIL and store the DTC. HINT: Example: When any of the following is met, the system judges it as a malfunction.

• There is a difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ECM commands lock-up. (Engine speed is at least 75 rpm greater than input turbine speed.)

• There is no difference in rotation between the input side (engine speed) and output side (input turbine speed) of the torque converter when the ECM commands lock-up off. (The difference between engine speed and input turbine speed is less than 35 rpm.)

• Shift solenoid valve DSL remains open or closed

• Valve body is blocked

• Torque converter clutch

• Automatic transaxle (clutch, brake or gear etc.)

• Line pressure is too low

AX

MONITOR STRATEGY

Related DTCs

Required sensors/Components

Frequency of operation Continuous

Duration

MIL operation 2 driving cycles

Sequence of operation None

P0741: Shift solenoid valve DSL/OFF malfunction Shift solenoid valve DSL/ON malfunction

Shift solenoid valve DSL, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE), Throttle position sensor (VPA1), Mass air flow sensor (MAF), Transmission temperature sensor (THO1), Engine coolant temperature sensor (ECT)

OFF malfunction

3.5 sec. ON malfunction

1.8 sec.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TYPICAL ENABLING CONDITIONS

ALL:

P0115 - P0118 (ECT sensor)

The monitor will run whenever this DTC is not present.

ECT (Engine coolant temperature) 10°C (50°F) or more Transmission range "D" TFT (Transmission fluid temperature) -20°C (-4°F) or more TFT sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction Turbine speed sensor circuit Not circuit malfunction Intermediate shaft speed sensor circuit Not circuit malfunction Output speed sensor circuit Not circuit malfunction Shift solenoid valve SL1 circuit Not circuit malfunction Shift solenoid valve SL2 circuit Not circuit malfunction Shift solenoid valve SL3 circuit Not circuit malfunction Shift solenoid valve S4 circuit Not circuit malfunction Shift solenoid valve SR circuit Not circuit malfunction Shift solenoid valve DSL circuit Not circuit malfunction Electronic throttle system Not circuit malfunction

P0125 (Insufficient ECT for closed loop)

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

AX–69

OFF malfunction

ECM lock-up command ON ECM selected gear 3rd, 4th or 5th Vehicle speed 25 km/h (15.5 mph) or more

ON malfunction

ECM lock-up command OFF ECM selected gear 3rd, 4th or 5th Throttle valve opening angle 8.5% or more Vehicle speed 25 to 60 km/h (15.5 to 37.3 mph)

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction or ON malfunction OFF malfunction:

Engine Speed - Input (turbine) speed 100 rpm or more

ON malfunction:

Difference between engine speed and input (turbine) speed Less than 35 rpm

INSPECTION PROCEDURE

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the intelligent tester together with the CAN VIM (controller area network vehicle

interface module) to the DLC3.

AX

AX–70

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST". (g) According to the display on the tester, perform the "ACTIVE TEST".

Item Test Details Diagnostic Note

[Test Details]

LOCK UP

Control the shift solenoid DSL to set the automatic transaxle to the lock-up condition. [Vehicle Condition] Vehicle Speed: 60 km/h (37 mph) or more

Possible to check the DSL

HINT:

• This test can be conducted when the vehicle speed is 60 km/h (37 mph) or more.

• This test can be conducted in the 5th gear.

(h) Lightly depress the accelerator pedal and check that the engine speed does not change

abruptly. HINT:

• When changing the accelerator pedal opening angle while driving, if the engine speed does not change, lock-up is on.

• Slowly release, but not fully, the accelerator pedal in order to decelerate. (Fully releasing the pedal will close the throttle valve and lock-up may be turned off.)

operation.

AX

1

Result

Accelerator Pedal Opening Angel

Accelerator Pedal Fully Released

Engine speed

time

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0741)

(a) Connect the OBD II scan tool or the intelligent tester

together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch on (IG) and turn the OBD II scan

tool or the intelligent tester main switch ON.

(c) When you use intelligent tester:

Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Display (DTC output) Proceed to

Only "P0741" is output A

"P0741" and other DTCs B

Lock-up OFF

Lock-up ON

G029214E02

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

HINT: If any other codes besides "P0741" are output, perform the troubleshooting for those DTCs first.

AX–71

A

INSPECT TRANSMISSION WIRE (DSL)

2

Transmission Wire Side:

(Connector Front View):

C25

DSL

C113969E25

B

GO TO DTC CHART

(a) Disconnect the transmission wire connector from the

transaxle.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Specified Condition

20°C (68°F)

NG

Tester Connection

10 - Body ground 11 to 13 Ω

Go to step 4

OK

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

3

Wire Harness Side:

(Connector Front View):

ECM

OK

DSL

C24

A136781E03

(a) Connect the transmission wire connector. (b) Disconnect the ECM connector. (c) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

C24-79 (DSL) - Body ground 11 to 13 Ω

NG

REPAIR OR REPLACE HARNESS OR

Specified Condition

20°C (68°F)

CONNECTOR

AX

AX–72

4

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT SHIFT SOLENOID VALVE (DSL)

Shift Solenoid Valve DSL:

(-)

(+)

OK

CHECK TRANSMISSION WIRE

5

C113970E01

(a) Remove the shift solenoid valve DSL. (b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

Solenoid Connector (DSL) - Solenoid

Body (DSL)

Specified Condition

20°C (68°F)

11 to 13 Ω

(c) Connect the positive (+) lead to the terminal of the

solenoid connector, and the negative (-) lead to the solenoid body.

OK:

The solenoid valve makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (DSL)

OK:

The connectors and pins are securely installed. There is no open or short on the wire harness.

NG

OK

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

6

OK:

There are no foreign objects on each valve. NG

OK

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

7

OK:

The torque converter clutch operates normally. NG

REPAIR OR REPLACE TRANSMISSION WIRE

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

OK

REPAIR AUTOMATIC TRANSAXLE ASSEMBLY

AX–73

AX

AX–74

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0746

Pressure Control Solenoid "A" Performance (Shift Solenoid Valve SL1)

SYSTEM DESCRIPTION

The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift sch edule in the ECM memory to detect mechan ical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).

DTC No. DTC Detecting Condition Trouble Area

P0746

The gear required by the ECM does not match the actual gear when driving (2-trip detection logic)

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL. HINT: Example: When either condition (a) or (b) is met, the ECM detects a malfunction. (a) The ECM commands the 1st gear, but the actual gear is 2nd. (b) The ECM commands the 2nd gear, but the actual gear is 1st.

• Shift solenoid valve SL1 remains open or closed

• Valve body is blocked

• Automatic transaxle (clutch, brake or gear etc.)

AX

MONITOR STRATEGY

Related DTCs

Required sensors/Components

Frequency of operation Continuous

Duration 0.8 sec.

MIL operation 2 driving cycles

Sequence of operation None

P0746: Shift solenoid valve SL1/OFF malfunction Shift solenoid valve SL1/ON malfunction

Shift solenoid valve SL1, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE)

TYPICAL ENABLING CONDITIONS

ALL:

P0115 - P0118 (ECT sensor)

The monitor will run whenever this DTC is not present.

ECT (Engine coolant temperature) 10°C (50°F) or more Transmission range "D" TFT (Transmission fluid temperature) -20°C (-4°F) or more TFT sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction Turbine speed sensor circuit Not circuit malfunction Intermediate shaft speed sensor circuit Not circuit malfunction Output speed sensor circuit Not circuit malfunction Shift solenoid valve SL1 circuit Not circuit malfunction Shift solenoid valve SL2 circuit Not circuit malfunction

P0125 (Insufficient ECT for closed loop)

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Shift solenoid valve SL3 circuit Not circuit malfunction Shift solenoid valve S4 circuit Not circuit malfunction Shift solenoid valve SR circuit Not circuit malfunction Shift solenoid valve DSL circuit Not circuit malfunction Electronic throttle system Not circuit malfunction

OFF malfunction:

ECM selected gear 1st Vehicle speed Less than 40 km/h (24.9 mph)

Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

ON malfunction:

ECM selected gear 2nd Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction or ON malfunction OFF malfunction:

2 detections are necessary per driving cycle: 1st detection; temporary flag ON 2nd detection; pending fault code ON

Input (turbine) speed/Intermediate shaft speed 1.49 to 1.63

AX–75

ON malfunction:

Input (turbine) speed/Intermediate shaft speed 2.72 to 2.86

INSPECTION PROCEDURE

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area

network vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST / SHIFT". (g) According to the display on the tester, perform the "ACTIVE TEST".

HINT: While driving, the shift position can be forcibly changed with the intelligent tester.

AX

AX–76

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See page AX-30).

Item Test Details Diagnostic Note

[Test Details] Operate the shift solenoid valve and set each shift position by yourself.

SHIFT

[Vehicle Condition] Less than 50 km/h (31 mph) [Others]

•Press "←" button: Shift up

•Press "→" button: Shift down

Possible to check the operation of the shift solenoid valves.

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

• The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the intelligent tester.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0746)

1

(a) Connect the OBD II scan tool or intelligent tester

together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch on (IG) and turn the OBD II scan

tool or the intelligent tester main switch ON.

(c) When you use intelligent tester:

Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Result

AX

Display (DTC output) Proceed to

Only "P0746" is output A

"P0746" and other DTCs B

HINT: If any other codes besides "P0746" are output, perform the troubleshooting for those DTCs first.

B

GO TO DTC CHART

A

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT SHIFT SOLENOID VALVE (SL1)

2

AX–77

Shift Solenoid Valve SL1:

1

(-)

OK

(+)

2

G020767E05

(a) Remove the shift solenoid valve SL1. (b) Measure the resistance according to the value(s) in the

table below.

Resistance

Tester Connection

1 - 2 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Connect the positive (+) lead with a 21 W bulb to

terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

OK:

The solenoid makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (SL1)

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

3

OK:

There are no foreign objects on each valve. NG

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

OK

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

4

OK:

The torque converter clutch operates normally. NG

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

OK

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

AX

AX–78

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0748

Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1)

DESCRIPTION

Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, SL3, S4 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly (Fail safe function).

DTC No. DTC Detection Condition Trouble Area

The ECM checks for an open or short in the shift solenoid valve SL1 circuit while driving and shift gears.

P0748

(1-trip detection logic)

• Output signal duty equals to 100 %. (NOTE: SL1 output signal duty is less than 100 % under normal condition.)

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shif t so lenoid valves "ON/ OFF". When the re is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores the DTC. And the ECM performs the fail-safe function and turns the other normal shift solenoid valves "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.) (See page AX-30).

• Open or short in shift solenoid valve SL1 circuit

• Shift solenoid valve SL1

•ECM

MONITOR STRATEGY

Related DTCs P0748: Shift solenoid valve SL1/Range check

Required sensors/Components Shift solenoid valve SL1

Frequency of operation Continuous

Duration 1 sec.

MIL operation Immediate

Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present. None Battery voltage 11 V or more Ignition switch ON Starter OFF

TYPICAL MALFUNCTION THRESHOLDS

Solenoid status from MIC Fail (Open or Short)

COMPONENT OPERATING RANGE

AX

Output signal duty Less than 100%

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

WIRING DIAGRAM

C25 Electronically Controlled Transmission Solenoid

SL1+ SL1+

SL1-

6

13

INSPECTION PROCEDURE

57

C24

77

C24

AX–79

ECM

+B

CPU

SL1-

G031765E34

INSPECT TRANSMISSION WIRE (SL1)

1

Transmission Wire Side:

(Connector Front View):

C25

SL1+

SL1-

OK

C113969E26

(a) Disconnect the transmission wire connector from the

transaxle.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

6 (SL1+) - 13 (SL1-) 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition SL1+ - Body ground 10 kΩ or higher SL1- - Body ground 10 kΩ or higher

NG

Go to step 3

AX

AX–80

2

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

Wire Harness Side:

(Connector Front View):

ECM

SL1-SL1+

OK

REPLACE ECM

C24

A136781E04

(a) Connect the transmission connector to the transaxle. (b) Disconnect the connector from the ECM. (c) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

C24-57 (SL1+) - C24-77 (SL1-) 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(d) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition

C24-57 (SL1+) - Body ground

C24-77 (SL1-) - Body ground

NG

REPAIR OR REPLACE HARNESS OR

10 kΩ or higher

CONNECTOR

AX

INSPECT SHIFT SOLENOID VALVE (SL1)

3

Shift Solenoid Valve SL1:

1

(-)

(+)

2

G020767E05

(a) Remove the shift solenoid valve SL1. (b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

1 - 2 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Connect the positive (+) lead with a 21 W bulb to

terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

OK:

The solenoid makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (SL1)

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

OK

REPAIR OR REPLACE TRANSMISSION WIRE

AX–81

AX

AX–82

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0766

Shift Solenoid "D" Performance (Shif t Solenoid Valve S4)

SYSTEM DESCRIPTION

The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift sch edule in the ECM memory to detect mechan ical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).

DTC No. DTC Detecting Condition Trouble Area

P0766

The gear required by the ECM does not match the actual gear when driving (2-trip detection logic)

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.

MONITOR STRATEGY

P0766:

Related DTCs

Required sensors/Components

Frequency of operation Continuous

Duration

MIL operation 2 driving cycles

Sequence of operation None

Shift solenoid valve S4/OFF malfunction Shift solenoid valve S4/ON malfunction

Shift solenoid valve S4, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE)

OFF malfunction (A) and ON malfunction (B) 1 sec. OFF malfunction (B)

1.2 sec. ON malfunction (A)

0.8 sec.

• Shift solenoid valve S4 remains open or closed

• Valve body is blocked

• Automatic transaxle (clutch, brake or gear etc.)

AX

TYPICAL ENABLING CONDITIONS

All:

P0115 - P0118 (ECT sensor)

The monitor will run whenever this DTC is not present.

ECT (Engine coolant temperature) 10°C (50°F) or more Transmission range "D" TFT (Transmission fluid temperature) -20°C (-4°F) or more TFT sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction Turbine speed sensor circuit Not circuit malfunction Intermediate shaft speed sensor circuit Not circuit malfunction Output speed sensor circuit Not circuit malfunction Shift solenoid valve SL1 circuit Not circuit malfunction Shift solenoid valve SL2 circuit Not circuit malfunction Shift solenoid valve SL3 circuit Not circuit malfunction

P0125 (Insufficient ECT for closed loop)

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Shift solenoid valve S4 circuit Not circuit malfunction Shift solenoid valve SR circuit Not circuit malfunction Shift solenoid valve DSL circuit Not circuit malfunction Electronic throttle system Not circuit malfunction

OFF malfunction (A):

ECM selected gear 5th Throttle valve opening angle 5% or more Vehicle speed 10 km/h (6.2 mph) or more

OFF malfunction (B):

ECM lock-up command ON ECM selected gear 3rd, 4th or 5th Throttle valve opening angle 10% or more Vehicle speed 25 to 100 km/h (15.5 to 62.1 mph)

ON malfunction (A):

ECM selected gear 4th or 5th Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

AX–83

ON malfunction (B):

ECM selected gear 4th Throttle valve opening angle 5% or more Vehicle speed 10 km/h (6.2 mph) or more

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction (A) and (B), or ON malfunction (A) and (B)

2 detections are necessary per driving cycle: 1st detection; temporary flag ON 2nd detection; pending fault code ON

OFF malfunction (A):

Intermediate shaft speed/Output speed 1.34 to 1.48

OFF malfunction (B):

Difference between engine speed and input (turbine) speed Less than 35 rpm

ON malfunction (A):

Input (turbine) speed/Intermediate shaft speed 0.64 to 0.74

ON malfunction (B):

Intermediate shaft speed/Output speed 0.95 to 1.09

INSPECTION PROCEDURE

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine. (b) Turn the ignition switch off.

AX

AX–84

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(c) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area

network vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST / SHIFT". (g) According to the display on the tester, perform the "ACTIVE TEST".

HINT: While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See page AX-30).

Item Test Details Diagnostic Note

[Test Details] Operate the shift solenoid valve and set each shift position by yourself.

SHIFT

[Vehicle Condition] Less than 50 km/h (31 mph) [Others]

•Press "→" button: Shift up

•Press "←" button: Shift down

Possible to check the operation of the shift solenoid valves.

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

• The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the intelligent tester.

1

Result

A

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0766)

(a) Connect the OBD II scan tool or intelligent tester

together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch on (IG) and turn the OBD II scan

tool or the intelligent tester main switch ON.

(c) Select the item "DIAGNOSIS / ENHANCED OBD II /

DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Display (DTC output) Proceed to

Only "P0766" is output A

"P0766" and other DTCs B

HINT: If any other codes besides "P0766" are output, perform the troubleshooting for those DTCs first.

B

GO TO DTC CHART

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT SHIFT SOLENOID VALVE S4

2

Shift Solenoid Valve S4:

(-)

(+)

AX–85

(a) Remove the shift solenoid valve S4. (b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

Solenoid Connector (S4) - Solenoid

Body (S4)

Specified Condition

20°C (68°F)

11 to 15 Ω

(c) Connect the positive (+) lead to the terminal of the

solenoid connector, and the negative (-) lead to the solenoid body.

OK:

The solenoid makes an operating sound.

C113971E01

NG

OK

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

3

OK:

There are no foreign objects on each valve. NG

OK

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

4

OK:

The torque converter clutch operates normally. NG

REPLACE SHIFT SOLENOID VALVE (S4)

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

OK

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

AX

AX–86

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0771

Shift Solenoid "E" Performance (Shift Solenoid Valve SR)

SYSTEM DESCRIPTION

The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift sch edule in the ECM memory to detect mechan ical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).

DTC No. DTC Detecting Condition Trouble Area

P0771

The gear required by the ECM does not match the actual gear when driving (2-trip detection logic)

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.

MONITOR STRATEGY

Related DTCs

Required sensors/Components

Frequency of operation Continuous

Duration

MIL operation 2 driving cycles

Sequence of operation None

P0771: Shift solenoid valve SR/Rationality check

Shift solenoid valve SR, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE)

OFF malfunction (A) 1 sec. OFF malfunction (B)

3.5 sec. ON malfunction (A) Continuous ON malfunction (B) and (C)

0.8 sec.

• Shift solenoid valve SR remains open or closed

• Valve body is blocked

• Automatic transaxle (clutch, brake or gear etc.)

AX

TYPICAL ENABLING CONDITIONS

All:

P0115 - P0118 (ECT sensor)

The monitor will run whenever this DTC is not present

ECT (Engine coolant temperature) 10°C (50°F) or more Transmission range "D" TFT (Transmission fluid temperature) -20°C (-4°F) or more TFT sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction Turbine speed sensor circuit Not circuit malfunction Intermediate shaft speed sensor circuit Not circuit malfunction Output speed sensor circuit Not circuit malfunction Shift solenoid valve SL1 circuit Not circuit malfunction Shift solenoid valve SL2 circuit Not circuit malfunction

P0125 (Insufficient ECT for closed loop)

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Shift solenoid valve SL3 circuit Not circuit malfunction Shift solenoid valve S4 circuit Not circuit malfunction Shift solenoid valve SR circuit Not circuit malfunction Shift solenoid valve DSL circuit Not circuit malfunction Electronic throttle system Not circuit malfunction

OFF malfunction (A):

ECM selected gear 5th Throttle valve opening angle 5% or more Vehicle speed 10 km/h (6.2 mph) or more

OFF malfunction (B):

ECM lock-up command ON ECM selected gear 3rd, 4th or 5th Vehicle speed 25 km/h (15.5 mph) or more

ON malfunction (A):

ECM lock-up command OFF

ON malfunction (B):

ECM selected gear 1st Vehicle speed Less than 40 km/h (24.9 mph)

Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

AX–87

ON malfunction (C):

ECM selected gear 3rd Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

ON malfunction (D):

Duration time from shift command of ECM 15 sec. or more ECM selected gear 4th or 5th

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction (A) and (B), or ON malfunction (A), (B), (C) and (D) OFF malfunction (A):

Intermediate shaft speed/Output speed 1.34 to 1.48

OFF malfunction (B):

Engine speed - Input (turbine) speed 75 rpm or more

ON malfunction (A):

Difference between engine speed and input (turbine) speed 150 rpm or more

ON malfunction (B):

Input (turbine) speed/Intermediate shaft speed 0.93 to 1.07

ON malfunction (C):

Input (turbine) speed/Intermediate shaft speed 0.93 to 1.07

ON malfunction (D):

Input (turbine) speed/Intermediate shaft speed 0.64 to 0.74

AX

AX–88

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECTION PROCEDURE

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area

network vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST / SHIFT". (g) According to the display on the tester, perform the "ACTIVE TEST".

HINT: While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See page AX-30).

Item Test Details Diagnostic Note

[Test Details] Operate the shift solenoid valve and set each shift position by yourself.

SHIFT

[Vehicle Condition] Less than 50 km/h (31 mph) [Others]

•Press "→" button: Shift up

•Press "←" button: Shift down

Possible to check the operation of the shift solenoid valves.

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

• The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the intelligent tester.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0771)

1

(a) Connect the OBD II scan tool or intelligent tester

together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch on (IG) and turn the OBD II scan

tool or the intelligent tester main switch ON.

(c) When you use intelligent tester:

Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Result

Display (DTC output) Proceed to

Only "P0771" is output A

"P0771" and other DTCs B

AX

HINT: If any other codes besides "P0771" are output, perform the troubleshooting for those DTCs first.

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–89

A

INSPECT SHIFT SOLENOID VALVE (SR)

2

Shift Solenoid Valve SR:

(+) (-)

C113977E01

B

GO TO DTC CHART

(a) Remove the shift solenoid valve SR. (b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

Solenoid Connector (SR) - Solenoid

Body (SR)

Specified Condition

20°C (68°F)

11 to 15 Ω

(c) Connect positive (+) lead to the terminal of solenoid

connector, negative (-) lead to the solenoid body.

OK:

The solenoid makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (SR)

OK

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

3

OK:

There are no foreign objects on each valve. NG

OK

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

4

OK:

The torque converter clutch operates normally. NG

OK

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBLY

AX

AX–90

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

DTC P0776

Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2)

SYSTEM DESCRIPTION

The ECM uses signals from the vehicle speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift sch edule in the ECM memory to detect mechan ical problems of the shift solenoid valves, valve body or automatic transaxle (clutch, brake or gear etc.).

DTC No. DTC Detecting Condition Trouble Area

P0776

The gear required by the ECM does not match the actual gear when driving (2-trip detection logic)

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ECM detects the actual gear position (1st, 2nd, 3rd, 4th or 5th gear position). When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.

MONITOR STRATEGY

P0776:

Related DTCs

Required sensors/Components Frequency of operation Continuous

Duration

MIL operation 2 driving cycles Sequence of operation None

Shift solenoid valve SL2/OFF malfunction Shift solenoid valve SL2/ON malfunction

Shift solenoid valve SL2, Speed sensor (NT), Speed sensor (NC), Crankshaft position sensor (NE)

OFF malfunction (A)

1.8 sec. OFF malfunction (B) and (C)

0.8 sec. ON malfunction (A) and (B)

0.8 sec. ON malfunction (C)

0.4 sec.

• Shift solenoid valve SL2 remains open or closed

• Valve body is blocked

• Automatic transaxle (clutch, brake or gear etc.)

AX

TYPICAL ENABLING CONDITIONS

All:

P0115 - P0118 (ECT sensor)

The monitor will run whenever this DTC is not present.

ECT (Engine coolant temperature) 10°C (50°F) or more Transmission range "D" TFT (Transmission fluid temperature) -20°C (-4°F) or more TFT sensor circuit Not circuit malfunction ECT sensor circuit Not circuit malfunction Turbine speed sensor circuit Not circuit malfunction Intermediate shaft speed sensor circuit Not circuit malfunction Output speed sensor circuit Not circuit malfunction Shift solenoid valve SL1 circuit Not circuit malfunction Shift solenoid valve SL2 circuit Not circuit malfunction

P0125 (Insufficient ECT for closed loop)

P0500 (VSS)

P0748, P0778, P0798 (Shift solenoid valve (range))

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Shift solenoid valve SL3 circuit Not circuit malfunction Shift solenoid valve S4 circuit Not circuit malfunction Shift solenoid valve SR circuit Not circuit malfunction Shift solenoid valve DSL circuit Not circuit malfunction Electronic throttle system Not circuit malfunction

OFF malfunction (A):

ECM lock-up command OFF Vehicle speed Less than 60 km/h (37.3 mph) Throttle valve opening angle 8.5% or more

OFF malfunction (B):

ECM selected gear 1st Vehicle speed Less than 40 km/h (24.9 mph)

Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

OFF malfunction (C):

ECM selected gear 3rd Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

AX–91

OFF malfunction (D):

Duration time from shift command of ECM 15 sec. or more ECM selected gear 4th or 5th

ON malfunction (A):

ECM selected gear 1st Vehicle speed Less than 40 km/h (24.9 mph)

Throttle valve opening angle

4.5% or more at engine speed 1,900 rpm (Varies with engine speed)

ON malfunction (B):

ECM selected gear 3rd Throttle valve opening angle Malfunction of pressure control solenoid "B" (SL2) and "C"

(SL3)

7.0% or more at output speed 1,400 rpm (Varies with engine speed)

Not detected

ON malfunction (C):

Throttle valve opening angle Malfunction of pressure control solenoid "B" (SL2) Not detected

7.0% or more at output speed 1,050 rpm (Varies with engine speed)

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met: OFF malfunction (A), (B), (C) and (D), or ON malfunction (A), (B) and (C) OFF malfunction (A):

Difference between engine speed and input (turbine) speed Less than 35 rpm

OFF malfunction (B) and (C):

Input (turbine) speed/Intermediate shaft speed 0.93 to 1.07

OFF malfunction (D):

Input (turbine) speed/Intermediate shaft speed 0.64 to 0.74

AX

AX–92

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

ON malfunction (A):

Input (turbine) speed/Intermediate shaft speed 2.72 to 2.86

ON malfunction (B):

Input (turbine) speed - Intermediate shaft speed 700 rpm or more

ON malfunction (C):

Input (turbine) speed - Intermediate shaft speed

Less than -500 rpm

or

700 rpm or more

INSPECTION PROCEDURE

HINT: Performing the ACTIVE TEST using the intelligent tester allows the relay, VSV, actuator and so on to operate without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one method to shorten labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

1. PERFORM ACTIVE TEST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area

network vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / ACTIVE TEST / SHIFT". (g) According to the display on the tester, perform the "ACTIVE TEST".

HINT: While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem (See page AX-30).

Item Test Details Diagnostic Note

[Test Details] Operate the shift solenoid valve and set the each shift position by yourself.

SHIFT

[Vehicle Condition] Less than 50 km/h (31 mph) [Others]

•Press "→" button: Shift up

•Press "←" button: Shift down

Possible to check the operation of the shift solenoid valves.

AX

HINT:

• This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less.

• The shift position commanded by the ECM is shown in the DATA LIST/SHIFT display on the intelligent tester.

CHECK OTHER DTCS OUTPUT (IN ADDITION TO DTC P0776)

1

(a) Connect the OBD II scan tool or intelligent tester

together with the CAN VIM (controller area network vehicle interface module) to the DLC3.

(b) Turn the ignition switch on (IG) and turn the OBD II scan

tool or the intelligent tester main switch ON.

(c) When you use intelligent tester:

Select the item "DIAGNOSIS / ENHANCED OBD II / DTC INFO / CURRENT CODES".

Result

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(d) Read the DTCs using the OBD II scan tool or the

intelligent tester.

Display (DTC output) Proceed to

Only "P0776" is output A

"P0776" and other DTCs B

HINT: If any other codes besides "P0776" are output, perform the troubleshooting for those DTCs first.

AX–93

A

INSPECT SHIFT SOLENOID VALVE (SL2)

2

Shift Solenoid Valve SL2:

1

B

GO TO DTC CHART

(a) Remove the shift solenoid valve SL2. (b) Measure the resistance according to the value(s) in the

2

table below.

Standard resistance

Tester Connection

1 - 2 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Connect the positive (+) lead with a 21 W bulb to

terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

2

OK:

The solenoid makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (SL2)

(-)

(+)

G020767E28

OK

INSPECT TRANSMISSION VALVE BODY ASSEMBLY

3

OK:

There are no foreign objects on each valve. NG

OK

REPAIR OR REPLACE TRANSMISSION VALVE BODY ASSEMBLY

AX

AX–94

4

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

INSPECT TORQUE CONVERTER CLUTCH ASSEMBLY

OK:

The torque converter clutch operates normally. NG

OK

REPAIR OR REPLACE AUTOMATIC TRANSAXLE ASSEMBL Y

REPLACE TORQUE CONVERTER CLUTCH ASSEMBLY

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–95

DTC P0778

Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)

DESCRIPTION

Shifting from 1st to 5th is performed in combination with "ON" and "OFF" operation of the shift solenoid valves SL1, SL2, SL3, S4 and SR which are controlled by the ECM. If an open or short circuit occurs in either of the shift solenoid valves, the ECM controls the remaining normal shift solenoid valves to allow the vehicle to be operated smoothly (Fail safe function).

DTC No. DTC Detection Condition Trouble Area

P0778

ECM checks for an open or short circuit in shift solenoid valves SL2 (1-trip detection logic) Hybrid IC for solenoid indicates fail.

MONITOR DESCRIPTION

The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores the DTC. And the ECM performs the fail-safe function and turns the other normal shift solenoid valves "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.) (See page AX-30).

MONITOR STRATEGY

• Open or short in shift solenoid valve SL2 circuit

• Shift solenoid valve SL2

•ECM

Related DTCs P0778: Shift solenoid valve SL2/Range check

Required sensors/Components Shift solenoid valve SL2

Frequency of operation Continuous

Duration 1 sec.

MIL operation Immediate

Sequence of operation None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present. None Solenoid current cut status Not cut Battery voltage 11 V or more Ignition switch ON Starter OFF CPU commanded duty ratio to SL2 19% or more

TYPICAL MALFUNCTION THRESHOLDS

Solenoid status from MIC Fail (Open or short)

COMPONENT OPERATING RANGE

Output signal duty Less than 100%

AX

AX–96

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

WIRING DIAGRAM

C25 Electronically Controlled Transmission Solenoid

SL2+

SL2-

INSPECTION PROCEDURE

5

12

58

C24

59

C24

ECM

+B

CPU

SL2+

SL2-

G031765E35

INSPECT TRANSMISSION WIRE (SL2)

1

Transmission Wire Side:

(Connector Front View):

SL2+

SL2-

C25

OK

C113969E27

(a) Disconnect the transmission wire connector from the

transaxle.

(b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

5 (SL2+) - 12 (SL2-) 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition

5 (SL2+) - Body ground 10 kΩ or higher

12 (SL2-) - Body ground 10 kΩ or higher

NG

Go to step 3

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

2

AX–97

Wire Harness Side:

(Connector Front View):

ECM

SL2-SL2+

OK

REPLACE ECM

C24

A136781E05

(a) Connect the transmission connector to the transaxle. (b) Disconnect the connector from the ECM. (c) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

C24-58 (SL2+) - C24-59 (SL2-) 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(d) Measure the resistance according to the value(s) in the

table below.

Standard resistance (Check for short)

Tester Connection Specified Condition

C24-58 (SL2+) - Body ground

C24-59 (SL2-) - Body ground

NG

REPAIR OR REPLACE HARNESS OR

10 kΩ or higher

CONNECTOR

INSPECT SHIFT SOLENOID VALVE (SL2)

3

Shift Solenoid Valve SL2:

1

(-)

(+)

2

G020767E28

(a) Remove the shift solenoid valve SL2. (b) Measure the resistance according to the value(s) in the

table below.

Standard resistance

Tester Connection

1 - 2 5.0 to 5.6 Ω

Specified Condition

20°C (68°F)

(c) Connect the positive (+) lead with a 21 W bulb to

terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.

OK:

The solenoid makes an operating sound.

NG

REPLACE SHIFT SOLENOID VALVE (SL2)

AX

AX–98

OK

REPAIR OR REPLACE TRANSMISSION WIRE

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–99

DTC P0793 Intermediate Shaft Speed Sensor "A"

DESCRIPTION

This sensor detects the rotation speed of the counter gear. By comparing the counter gear speed signal (NC) with the direct clutch speed sensor signal (NT), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus smooth gear shifting is performed.

DTC No. DTC Detection Condition Trouble Area

ECM detects conditions (a), (b) and (c) continuously for 5 sec. or more: (1-trip detection logic)

P0793

(a) Vehicle speed: 50 km/h (31 mph) or more (b) Park/neutral position switch (STAR) is OFF (c) Speed sensor (NC): less than 300 rpm

Reference (Using an oscilloscope): Check the waveform between terminals NC+ and NC- of the ECM connector.

• Open or short in transmission revolution sensor NC (speed sensor NC) circuit

• Transmission revolution sensor NC (speed sensor NC)

•ECM

1 V/DIV

1 ms/DIV

C093866E01

Standard: Refer to the illustration.

Terminal NC+ - NCTool setting 1 V/DIV, 1ms/DIV

Vehicle condition

Vehicle speed 30 km/h (19 mph): (3rd gear) Engine speed 1,400 rpm

MONITOR DESCRIPTION

The NC terminal of the ECM detects a revolution signal from the speed sensor (NC) (counter gear rpm). The ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC). While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the counter gear

revolution is less than 300 rpm

*1

although the output shaft revolution is more than 1,000 rpm *2, the ECM detects the trouble, illuminates the MIL and stores the DTC. *1: Pulse is not output or is irregularly output. *2: The vehicle speed is 50 km/h (31 mph) or more.

MONITOR STRATEGY

Related DTCs P0793: Speed sensor (NC)/Verify pulse input

Required sensors/Components Speed sensor (NC), Speed sensor (NT), Park/neutral position switch

Frequency of operation Continuous

Duration 5 sec.

MIL operation Immediate

Sequence of operation None

AX

AX–100

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TYPICAL ENABLING CONDITIONS

The monitor will run whenever this DTC is not present. Engine Running

NSW switch OFF Output shaft rpm 1,000 rpm or more Battery voltage 8 V or more Ignition switch ON Starter OFF

P0748, P0778, P0798 (Shift solenoid valve(range))

P0500 (VSS)

TYPICAL MALFUNCTION THRESHOLDS

Sensor signal rpm Less than 300 rpm

COMPONENT OPERATING RANGE

Counter gear speed sensor (NC)

HINT: 3rd when shift lever position is D position (After warming up the engine);

• Intermediate shaft speed (NC) becomes close to the engine speed.

WIRING DIAGRAM

AX

C27

Speed Sensor (Counter Gear)

101

C24

12

102

C24

ECM

NC+

5V

NC-

E1

G031763E45

INSPECTION PROCEDURE

HINT: According to the DA TA LIST displayed by the OBD II scan tool or intelligent tester, you can read the value of the switch, sensor , actuator and so on without p arts remo val. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.

1. READ DATA LIST

(a) Warm up the engine. (b) Turn the ignition switch off. (c) Connect the OBD II scan tool or intelligent tester together with the CAN VIM (controller area

network vehicle interface module) to the DLC3. (d) Turn the ignition switch on (IG). (e) Turn on the tester. (f) Select the item "DIAGNOSIS / OBD/MOBD / ECT / DATA LIST". (g) According to the display on the tester, read the "DATA LIST".

Toyota Camry 2007-2009 Service Manual - U250E_Automatic_Transaxle

Specifications and Main Features

Frequently Asked Questions

User Manual