Toyota Yaris 2007 User Manual

U340E 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-14).

• Perform the REGISTRATION (VIN registration) when replacing the ECM (See page ES-13).

HINT: The RESET MEMORY cannot be completed by only disconnecting the battery cable.

CAUTION: When using compressed air, always aim away from yourself to prevent Automatic Transmission Fluid (ATF) or kerosene from spraying on your face. NOTICE:

• The automatic transaxle is composed of high precision 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. As far as possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair that group immediately. If a component group cannot be assembled because some parts are on order, 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.

• When changing the automatic transmission fluid, use only "Toyota Genuine ATF WS" (ATF JWS3324 or NWS9638).

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

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

• Only recommended ATF or kerosene should be used for cleaning.

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

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

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

• New brake and clutch discs that are to be used for replacement must be soaked in ATF for at least 15 minutes before reassembly.

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

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

• Do not apply adhesive cements to gaskets or similar parts.

• Make sure that the ends of snap rings are not aligned with any cutouts and are installed in the grooves correctly.

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

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

• 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.

– Clean both sealing surfaces with a non-residue

solvent.

– Parts must be reassembled within 10 minutes of

application. Otherwise, the packing (FIPG) material must be removed and reapplied.

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–3

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

Typical enabling conditions

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 concludes that there is a malfunction and sets a DTC.

MIL operation

Component operating range

A group of diagnostic trouble codes that are output by the ECM based on the same malfunction detection logic.

Preconditions that allow the ECM to detect malfunctions. 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 one sensor is being monitored, the next sensor or component is not monitored until the current monitoring is concluded.

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

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

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

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

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PARTS LOCATION

STOP LIGHT SWITCH

COMBINATION METER

- MIL (MALFUNCTION INDICATOR LAMP)

SHIFT LOCK CONTROL ECU

DLC3 (DATA LINK CONNECTOR 3)

TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

PARK / NEUTRAL POSITION SWITCH

SHIFT SOLENOID VALVE S2

SHIFT SOLENOID VALVE S1

ECM

VEHICLE SPEED SENSOR

TRANSMISSION REVOLUTION SENSOR (SPEED SENSOR (NT))

SHIFT SOLENOID VALVE SLU

SHIFT SOLENOID VALVE SLT

SHIFT SOLENOID VALVE ST

C130143E01

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

SYSTEM DIAGRAM

The configuration of the electronic control system in the U340E automatic transaxle is as shown in the following chart.

AX–5

To IG2 Relay

To Ignition Switch

Park/Neutral Position Switch

IGN

Starter

ETCS

IGSW

STAR

STA

+BM

ECM

ST1-

STP

ODMS

R N

D 2

Stop Light Switch

STOP

Stop Light

Shift Lock Control ECU

To Gauge Fuse

Park/Neutral Position Switch

Electronically Controlled Transmission Solenoid

MAIN

Battery

EFI

To C/OPN Relay

EFI

BATT +B

+B2 MREL

E01 E02

SLU+

SLU-

SLT+

SLT-

THO1

ETHO

Shift Solenoid Valve SLU

Shift Solenoid Valve SLT

Shift Solenoid Valve S1

Shift Solenoid Valve S2

Shift Solenoid Valve ST

ATF Temperature Sensor

C130145E01

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

To MET Fuse

Combination Meter

Vehicle Speed Sensor

To ECU-IG Fuse

SPD

NT+

NT-

TACH

CANH

CANL

Transmission Revolution Sensor (Speed Sensor NT)

DLC3

To CAN BUS

C130144E01

U340E 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/transaxle performance are improved. Shift shock has been reduced by controlling the engine and transmission simultaneously. In addition, the ECT has features such as the following:

• Diagnostic function

• Fail-safe function when a malfunction occurs

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:

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

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

Vehicle Brought to Workshop

Customer Problem Analysis

Connect Intelligent Tester to DLC3

Check and Clear DTCs and Freeze Frame Data

HINT: (See page AX-25).

Visual Inspection

Setting Check Mode Diagnosis

HINT: (See page AX-26).

Problem Symptom Confirmation

HINT: (See page AX-9).

Symptom does not occur: Go to step 8

Symptom occurs: Go to step 9

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Symptom Simulation

DTC Check

AX–9

HINT: (See page IN-26).

HINT: (See page AX-25).

DTC is not output: Go to step 10

DTC is output: Go to step 17

Basic Inspection

Mechanical System Test

Hydraulic Test

HINT: (See page AX-93, AX-106 and AX-107).

HINT: (See page AX-11).

HINT: (See page AX-13).

Go to step 19

Go to step 16

Manual Shifting Test

HINT: (See page AX-14).

Go to step 16

Go to step 15

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Problem Symptoms Table Chapter 1

HINT: (See page AX-17).

Problem Symptoms Table Chapter 2

HINT: (See page AX-17).

Part Inspection

DTC Chart

Go to step 18

Go to step 19

End

HINT: (See page AX-32).

Circuit Inspection

Repair or Replace

Confirmation Test

U340E 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. PERFORM ROAD TEST NOTICE: Perform the test at the ATF (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, fully depress the accelerator pedal and check the following points. (1) Check up-shift operation.

Check that 1st to 2nd, 2nd to 3rd and 3rd to 4th up-shifts take place, and that the shift points conform to the automatic shift schedule (See page SS-19). HINT: 4th Gear Up-shift Prohibition Control

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

or less.

• ATF temperature is 10 °C (50 °F) or less. 4th Gear Lock-up Prohibition Control

• Brake pedal is depressed.

• Accelerator pedal is released.

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

or less.

• ATF temperature is 10 °C (50 °F) or less.

(2) Check for shift shock and slippage.

Check for shock and slippage when up-shifting from 1st to 2nd, 2nd to 3rd and 3rd to 4th.

(3) Check for abnormal noises and vibration.

Check for abnormal noise and vibration when up-shifting from 1st to 2nd, 2nd to 3rd and 3rd to 4th while driving with the shift lever in the D position, and also check while driving in the lockup condition. HINT: The cause of abnormal noises and vibration must be checked very thoroughly as it could also cause loss of balance in parts, such as the differential and torque converter.

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(4) Check kick-down operation.

Check the possible kick-down vehicle speeds when the 2nd to 1st, 3rd to 2nd and 4th to 3rd kick-downs take place while driving with the shift lever in the D position. Confirm that each takes place within the applicable vehicle speed range indicated in the automatic shift schedule (See page SS-19).

(5) Check for abnormal shock and slippage during

kick-down.

(6) Check the lock-up mechanism.

• Drive in the D position (4th gear) at a constant speed (lock-up ON) of approximately 37 mph (60 km/h).

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

HINT:

• There is no lock-up function in the 1st, 2nd and 3rd gears in the D position.

• If there is a sudden increase in engine speed, lock-up has not occurred.

(b) 3 position test

Shift into the 3 position, fully depress the accelerator pedal and check the following points: (1) Check the transmission control switch operation.

While driving in the D position (4th gear), shift the shift lever into the 3 position, and check that the 4th to 3rd down-shift takes place.

(2) Check up-shift operation.

Check that the 1st to 2nd and 2nd to 3rd upshifts take place, and that the shift points conform to the automatic shift schedule (See page SS-19). HINT: There is no 3rd to 4th up-shift in the 3 position.

(3) Check engine braking.

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

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

Check that the 1st to 2nd up-shift takes place and that the shift point conforms to the automatic shift schedule (See page SS-19). HINT: There is no lock-up function in the 2 position.

(2) Check engine braking.

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

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(3) Check for abnormal noises during acceleration

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

(d) L position test

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

While driving in the L position, check that there is no up-shift to 2nd gear.

(2) Check engine braking.

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

(3) Check for abnormal noises during acceleration

and deceleration.

(e) R position test

Shift into the R position, fully depress the accelerator pedal and check for slippage.

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

(f) P position test

Stop the vehicle on a slope (more than 5°), shift into the P position and release the parking brake. Check that the vehicle does not move.

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AX–14

Evaluation:

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Test Result Possible Cause

Stall speed is lower than standard value

Stall speed is higher than standard value

MECHANICAL SYSTEM TESTS

1. STALL SPEED TEST

HINT: This test is to check the overall performance of the engine and transaxle by measuring the stall speeds in the D position.

NOTICE:

• Do not perform the stall speed test for longer than 5 seconds.

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

• The stall speed test must always be carried out by pairs of technicians. One technician must watch the wheels and wheel stoppers from outside the vehicle to make sure they do not slip, while the other performs the test.

(a) Connect the intelligent tester to the DLC3. (b) Run the vehicle until the ATF (Automatic

Transmission Fluid) temperature reaches 50° to 80°C (122° to 176°F).

OFF. (d) Chock all 4 wheels. (e) Set the parking brake and keep the brake pedal

firmly depressed with your left foot. (f) Shift the shift lever to the D position. (g) Depress the accelerator pedal all the way down with

your right foot. (h) Read the engine rpm (stall speed) and release the

accelerator pedal immediately.

Standard value:

1,850 to 2,450 rpm

• Stator one-way clutch is not operating properly

• Torque converter is faulty (Stall speed is less than standard value by 600 rpm or more.)

• Engine power is insufficient

• Line pressure is too low

• Forward clutch (C1) is slipping

• No. 2 one-way clutch (F2) is not operating properly

2. SHIFT TIME LAG TEST

HINT: This test is to check the conditions of the direct clutch, forward clutch, 1st brake and reverse brake. (a) Connect the intelligent tester to the DLC3. (b) Run the vehicle until the ATF (Automatic

Transmission Fluid) temperature reaches 50° to 80°C (122° to 176°F).

OFF.

(d) Set the parking brake and keep the brake pedal

firmly depressed with your left foot.

Evaluation :

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Test Result Possible Cause

D range time lag exceeds standard value

R range time lag exceeds standard value

(e) Check the D range time lag.

(1) Shift the shift lever into the N position and wait

for 1 minute. (

(2) Shift the shift lever into the D position and

measure the time until the shock is felt. (

(3) Repeat procedures (

1) and (*2) three times, and

calculate the average time of the three tests.

(f) Check the R range time lag.

(1) Shift the shift lever into the N position and wait

for 1 minute. (

(2) Shift the shift lever into the R position and

measure the time until the shock is felt. (

(3) Repeat procedures (

3) and (*4) three times, and

calculate the average time of the three tests.

Standard value:

D range time lag is less than 1.2 seconds R range time lag is less than 1.5 seconds

• Line pressure is too low

• Forward clutch (C1) is worn

• No. 2 one-way clutch (F2) is not operating properly

• Line pressure is too low

• Reverse clutch (C3) is worn

• 1st and reverse brake (B3) is worn

AX–15

G024063E02

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 must always be carried out by pairs of technicians. One technician must observe the condition of the wheels and wheel stoppers outside the vehicle, while the other is performing the test.

• Prevent the SST hose from interfering with the exhaust pipe.

• This test must be conducted after checking and adjusting the engine.

• Perform this test with the air conditioning OFF.

• Do not continue the stall test for more than 5 seconds.

(1) Warm up the ATF. (2) Lift the vehicle up. (3) Remove the engine under cover. (4) Remove the test plug on the transmission case

center right side and connect SST.

SST 09992-00095 (09992-00231, 09992-

00271)

(5) Connect the intelligent tester to the DLC3.

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Standard line pressure

Condition

Idling

Stall

D position kPa (kgf / cm

(3.8 to 4.2 kgf/cm

(11.5 to 12.5 kgf/cm

Evaluation:

Problem Possible Cause

Measured values are higher than specified values in all positions

Measured values are lower than specified values in all positions

Pressure is low in D position only

Pressure is low in R position only

(6) Fully apply the parking brake and chock all 4

wheels. (7) Start the engine and check the idling speed. (8) Keep your left foot pressing firmly on the brake

pedal and shift into the D position. (9) Measure the line pressure when the engine is

idling. (10)Depress the accelerator pedal all the way down.

Quickly read the highest line pressure when

engine speed reaches stall speed. (11)Perform the test in the R position in the same

manner.

372 to 412 kPa

1,126 to 1,226 kPa

, 54 to 60 psi)

, 163 to 178 psi)

• Shift solenoid valve SLT defective

• Regulator valve defective

• Shift solenoid valve SLT defective

• Regulator valve defective

• Oil pump defective

• D position circuit fluid leak

• Forward clutch defective

• R position circuit fluid leak

• Reverse clutch defective

• 1st and reverse brake defective

, psi) R position kPa (kgf / cm2, psi)

553 to 623 kPa

(5.6 to 6.4 kgf/cm2, 80 to 90 psi)

1,664 to 1,864 kPa

(17.0 to 19.0 kgf/cm2, 241 to 270 psi)

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

MANUAL SHIFTING TEST

1. PERFORM MANUAL SHIFTING TEST

HINT:

• This test can be used to determine whether the trouble is occurring 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 transmission wire connector.

HINT: It is possible to deactivate the electrical shift control by disconnecting the transmission wire. In this way, it is possible to change gear positions by mechanical shift change using the shift lever.

(b) Drive with the transmission wire disconnected. Shift

the shift lever into each position to check whether the gear position changes as shown in the table below.

Shift Position Shifting Condition

D3rd

33rd

23rd

L3rd

R Reverse

P Pawl Lock

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C117640E01

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U340E 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 only be performed

using an intelligent tester.

HINT: The ECM stores the conditions that the ECT controls the automatic transaxle assembly and engine assembly in accordance with those characteristics. Therefore, when the automatic transaxle assembly, engine assembly, or ECM is replaced, it is necessary to reset the memory so that the ECM can store the new information. The reset procedure is as follows. (a) Turn the ignition switch off. (b) Connect the intelligent tester to the DLC3. (c) Turn the ignition switch to the ON position and push

the intelligent tester main switch on.

(d) Select the following items: 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) as described earlier.

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

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

AX–19

C130151

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U340E 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 ECT malfunctions. (The DTCs may not be detected due to the actual driving conditions. And some DTCs may not be detected through this drive pattern.) HINT: Preparation for driving

• Warm up the engine. (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 (lock-up ON).

• Repeat the above driving pattern three times or more.

NOTICE:

• The monitor status can be checked using the intelligent tester. When using an 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.

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

Vehicle Speed

pproximately

62 mph (100 km/h)

pproximately

50 mph (80 km/h)

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

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

Lock-up ON Vehicle Speed

AX–21

Warmed up sufficiently

Normal acceleration through all gears from 1st to 4th

Stop (Idling)

G031593E14

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: To detect DTC P0711 (ATF temperature sensor malfunction), drive the vehicle for approximately 30 minutes.

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U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

PROBLEM SYMPTOMS TABLE

HINT:

• If a normal code is displayed during the DTC check although the trouble still occurs, check the electrical circuits for each symptom in the order given in the following charts and proceed to the page given for troubleshooting.

• The Matrix Chart is divided into 2 chapters.

• When the circuit on which DTC could be output.

Chapter 1: Electronic Circuit Matrix Chart

Refer to the table below when the trouble cause is considered to be electrical. If the trouble still occurs even though there are no abnormalities in any of the other circuits, then check and replace the ECM.

Symptom Suspected area See page

No up-shift (Particular gear, from 1st to 3rd gear, is not up-shifted)

No up-shift (From 3rd to 4th)

No down-shift (From 4th to 3rd)

No down-shift (Particular gear, from 1st to 3rd gear, is not down-shifted)

No lock-up or No lock-up off

Shift point too high or too low

Up-shift to 2nd while in L position ECM IN-34

Up-shift to 3nd while in 2 position ECM IN-34

Up-shift from 3rd to 4th in 3 position

Up-shift from 3rd to 4th while engine is cold

Harsh engagement (From N to D)

Harsh engagement (From 3rd to 4th)

Harsh engagement (Lock-up)

Harsh engagement (Any driving position)

Poor acceleration ECM IN-34

No kick-down ECM IN-34

ECM IN-34

1. Shift lock control unit circuit AX-47

2. ECM IN-34

1. Shift lock control unit circuit AX-47

2. ECM IN-34

ECM IN-34

1. Stop light switch circuit *1 ES-48

2. Engine coolant temperature sensor circuit *1 ES-48

3. Vehicle speed sensor circuit *1 ES-48

4. Speed sensor (NT) circuit *1 AX-50

5. ATF temperature sensor circuit *1 AX-42

6. Shift solenoid valve S1 *1 AX-67

7. Shift solenoid valve S2 *1 AX-71

8. Shift solenoid valve SLU *1 AX-89

9. Throttle position sensor circuit *1 ES-48

10. ECM IN-34

1. Throttle position sensor circuit *1 ES-48

2. ECM IN-34

1. Shift lock control unit circuit AX-47

2. Park/neutral position switch *1 AX-35

3. ECM IN-34

1. Engine coolant temperature sensor circuit *1 ES-48

2. ECM IN-34

1. Park/neutral position switch *1 AX-35

2. ECM IN-34

1. Shift solenoid valve ST *1 AX-63

2. ECM IN-34

1. Shift solenoid valve SLU *1 AX-89

2. ECM IN-34

1. Throttle position sensor circuit *1 ES-48

2. ECM IN-34

1 is attached malfunctions, a

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Symptom Suspected area See page

Engine stalls when starting off or stopping ECM IN-34

1. Park/neutral position switch *1 AX-35

Malfunction in shifting

2. Shift lock control unit circuit AX-47

3. ECM IN-34

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

Symptom Suspected area See page

1. Manual valve AX-253

2. Valve body assembly AX-113

Vehicle does not move in any forward positions or in R position

Vehicle does not move in R position

No up-shift (From 1st to 2nd)

No up-shift (From 2nd to 3rd)

No up-shift (From 3rd to 4th)

No down-shift (From 4th to 3rd) Valve body assembly AX-113

No down-shift (From 3rd to 2nd) Valve body assembly AX-113

No down-shift (From 2nd to 1st) Valve body assembly AX-113

No lock-up or No lock-up off

Harsh engagement (From N to D)

Harsh engagement (Lock-up)

Harsh engagement (From N to R)

Harsh engagement (From 1st to 2nd)

Harsh engagement (From 2nd to 3rd)

Harsh engagement (From 3rd to 4th)

3. Planetary gear unit AX-173

4. Forward clutch (C1) AX-173

5. No. 2 one-way clutch (F2) AX-173

6. Reverse clutch (C3) AX-173

7. 1st and reverse brake (B3) AX-173

1. Manual valve AX-253

2. Valve body assembly AX-113

3. Planetary gear unit AX-173

4. Reverse clutch (C3) AX-173

5. 1st and reverse brake (B3) AX-173

1. Valve body assembly AX-113

2. 2nd brake (B2) AX-173

3. No. 1 one-way clutch (F1) AX-173

1. Valve body assembly AX-113

2. Direct clutch (C2) AX-173

1. Valve body assembly AX-113

2. O/D and 2nd brake (B1) AX-173

1. Valve body assembly AX-113

2. Torque converter clutch AX-171

1. Valve body assembly AX-113

2. Forward clutch (C1) AX-173

3. No. 2 one-way clutch (F2) AX-173

1. Valve body assembly AX-113

2. Torque converter clutch AX-171

1. Valve body assembly AX-113

2. C3 accumulator AX-173

3. Reverse clutch (C3) AX-173

4. 1st and reverse brake (B3) AX-173

1. B2 accumulator AX-173

2. Valve body assembly AX-113

3. 2nd brake (B2) AX-173

4. No. 1 one-way clutch (F1) AX-173

1. C2 accumulator AX-173

2. Valve body assembly AX-113

3. Direct clutch (C2) AX-173

1. Shift solenoid valve ST AX-63

2. Valve body assembly AX-113

3. O/D and 2nd brake (B1) AX-173

AX–23

AX–24

Harsh engagement (From 4th to 3rd)

Harsh engagement (D, 2, L position) Valve body assembly AX-113

Slippage or shuddering (Forward position)

Slippage or shuddering (R position)

Slippage or shuddering (1st) No. 2 one-way clutch (F2) AX-173

Slippage or shuddering (2nd)

Slippage or shuddering (3rd) Direct clutch (C2) AX-173

Slippage or shuddering (4th) O/D and 2nd brake (B1) AX-173

No engine braking (1st: L position)

No engine braking (2nd: 2 position)

No kick-down Valve body assembly AX-113

Poor acceleration

Engine stalls when starting off or stopping Torque converter clutch AX-171

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Symptom Suspected area See page

1. Shift solenoid valve ST AX-63

2. Valve body assembly AX-113

1. Valve body assembly AX-113

2. Oil strainer AX-113

3. Torque converter clutch AX-171

4. Forward clutch (C1) AX-173

5. Direct clutch (C2) AX-173

6. O/D and 2nd brake (B1) AX-173

7. 2nd brake (B2) AX-173

8. No. 1 one-way clutch (F1) AX-173

9. No. 2 one-way clutch (F2) AX-173

1. Valve body assembly AX-113

2. Oil strainer AX-113

3. Reverse clutch (C3) AX-173

4. 1st and reverse brake (B3) AX-173

1. 2nd brake (B2) AX-173

2. No.1 one-way clutch (F1) AX-173

1. Valve body assembly AX-113

2. 1st and reverse brake (B3) AX-173

1. Valve body assembly AX-113

2. 2nd and O/D brake (B1) AX-173

1. Valve body assembly AX-113

2. Torque converter clutch AX-171

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TERMINALS OF ECM

1. ECM

AX–25

C20

㪈㪏㪈㪐㪉㪇㪉㪈㪉㪉㪉㪊

㪋㪈㪋㪉㪋㪊㪋㪋㪋㪌㪋㪍

㪏㪈㪏㪉㪏㪊㪏㪋㪏㪌㪏㪍

㪈㪇㪋㪈㪇㪌㪈㪇㪍㪈㪇㪎㪈㪇㪏㪈㪇㪐

㪈㪉㪊㪋㪌㪍㪎㪏㪐㪈㪇㪈㪈㪈㪉㪈㪊㪈㪋㪈㪌㪈㪍㪈㪎

㪉㪋㪉㪌㪉㪍㪉㪎㪉㪏㪉㪐㪊㪇㪊㪈㪊㪉㪊㪊㪊㪋㪊㪌㪊㪍㪊㪎㪊㪏㪊㪐㪋㪇

㪋㪎㪋㪏㪋㪐㪌㪇㪌㪈㪌㪉㪌㪊㪌㪋㪌㪌㪌㪍㪌㪎㪌㪏㪌㪐㪍㪇㪍㪈㪍㪉㪍㪊

㪍㪋㪍㪌㪍㪍㪍㪎㪍㪏㪍㪐㪎㪇㪎㪈㪎㪉㪎㪊㪎㪋㪎㪌㪎㪍㪎㪎㪎㪏㪎㪐㪏㪇

㪏㪎㪏㪏㪏㪐㪐㪇㪐㪈㪐㪉㪐㪊㪐㪋㪐㪌㪐㪍㪐㪎㪐㪏㪐㪐㪈㪇㪇㪈㪇㪈㪈㪇㪉㪈㪇㪊

㪈㪈㪇㪈㪈㪈㪈㪈㪉㪈㪈㪊㪈㪈㪋㪈㪈㪌㪈㪈㪍㪈㪈㪎㪈㪈㪏㪈㪈㪐㪈㪉㪇㪈㪉㪈㪈㪉㪉㪈㪉㪊㪈㪉㪋㪈㪉㪌㪈㪉㪍

A21

㪋㪌㪍㪎㪏㪐㪈㪇㪈㪈

㪈㪉㪈㪊㪈㪋㪈㪌㪈㪍㪈㪎㪈㪏㪈㪐

㪉㪊㪉㪋㪉㪌㪉㪍㪉㪎㪉㪏㪉㪐㪊㪇

㪊㪋㪊㪌㪊㪍㪊㪎㪊㪏㪊㪐㪋㪇㪋㪈

㪋㪉㪋㪊㪋㪋㪋㪌㪋㪍㪋㪎㪋㪏㪋㪐

㪌㪊㪌㪋㪌㪌㪌㪍㪌㪎㪌㪏㪌㪐㪍㪇

㪈

㪉㪊

㪉㪇㪉㪈㪉㪉

㪊㪈㪊㪉㪊㪊

㪌㪇㪌㪈㪌㪉

C105085E01

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 be 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.) Wiring Color Terminal Description Condition Specified Condition

L (C20-74) - E1 (C20-104) V - W

2 (C20-55) - E1 (C20-104) G - W

ODMS (A21-26) - E1

(C20-104)

D (C20-56) - E1 (C20-104) L - W

R (C20-53) - E1 (C20-104) R - W

O - W

L shift position switch signal

2 shift position switch signal

3 shift position switch signal

D shift position switch signal

R shift position switch signal

Ignition switch ON and shift lever L position

Ignition switch ON and shift lever other than L position

Ignition switch ON and shift lever 2 position

Ignition switch ON and shift lever other than 2 position

Ignition switch ON and shift lever 3 position

Ignition switch ON and shift lever other than 3 position

Ignition switch ON and shift lever D or 3 position

Ignition switch ON and shift lever other than D and 3 positions

Ignition switch ON and shift lever R position

Ignition switch ON and shift lever other than R position

11 to 14 V

Below 1 V

11 to 14 V

Below 1 V

11 to 14 V

Below 1 V

11 to 14 V

Below 1 V

11 to 14 V

Below 1 V

AX–26

Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition

N (C20-54) - E1 (C20-104) SB - W

P (C20-73) - E1 (C20-104) R - W

NT+ (C20-125) - NT-

(C20-124)

STP (A21-36) - E1 (C20-

104)

SPD (A21-8) - E1 (C20-

104)

S1 (C20-79) - E1 (C20-

104)

S2 (C20-78) - E1 (C20-

104)

ST (C20-80) - E1 (C20-

104)

SLT+ (C20-76) - SLT-

(C20-75)

SLU+ (C20-57) - SLU-

(C20-77)

THO1 (C20-72) - ETHO

(C20-95)

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Ignition switch ON and

N shift position switch signal

P shift position switch signal

B - G Speed sensor (NT) signal Engine running

G - W Stop light switch signal

V - W Speed signal

SB - W S1 solenoid signal

L - W S2 solenoid signal

GR - W ST solenoid signal

G - W SLT solenoid signal Engine idling speed

P - O SLU solenoid signal Engine idling speed

ATF (Automatic

Y - B

Transmission Fluid) temperature sensor signal

shift lever N position

Ignition switch ON and shift lever other than N position

Ignition switch ON and shift lever P position

Ignition switch ON and shift lever other than P position

Brake pedal depressed 7.5 to 14 V

Brake pedal released Below 1.5 V

Ignition switch ON and driving wheel rotating slowly

Ignition switch ON 11 to 14 V

1st or 2nd gear 11 to 14 V

3rd or 4th gear Below 1 V

Ignition switch ON Below 1 V

1st or 4th gear 11 to 14 V

2nd or 3rd gear Below 1 V D position (3rd gear ←→

4th gear)

ATF temperature: 10°C (50°F) to 145°C (293°F)

Below 1 V ←→ 11 to 14 V

11 to 14 V

Below 1 V

11 to 14 V

Below 1 V

Pulse generation

(See waveform 1)

Pulse generation

(See waveform 2)

Pulse generation

(See waveform 3)

Pulse generation

(See waveform 4)

4 to 0 V

(a) Waveform 1

2 V/DIV

Terminal NT+ - NT-

Tool setting 2 V/DIV, 1ms/DIV

Vehicle conditions Driving at approximately 12 mph (20 km/h)

1 ms/DIV

20 ms/DIV

C053419E04

2 V/DIV

C053421E04

(b) Waveform 2

Terminal SPD - E1

Tool setting 2 V/DIV, 20 ms/DIV

Vehicle conditions Driving at approximately 12 mph (20 km/h)

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

5 V/DIV

Terminal SLT+ - SLT-

Tool setting 5 V/DIV, 1 ms/DIV

Vehicle conditions Engine idling speed

AX–27

1 ms/DIV

C055887E01

(d) Waveform 4

5 V/DIV

Terminal SLU+ - SLU-

Tool setting 5 V/DIV, 1 ms/DIV

Vehicle conditions Engine idling speed

C058033E01

AX–28

U340E 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 intelligent tester (complying with SAE J1987) to the vehicle, and read off various data output by 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 affect 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-32).

FI00534

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

DLC3

CAN VIM

Intelligent Tester

C115104E01

the DLC3 of the vehicle. The 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 the manufacturer within the prescribed limits (See page AX-32).

(e) The diagnosis system operates in normal mode

during normal vehicle use. In normal mode, 2-trip detection logic is used to ensure accurate detection of malfunctions. 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 malfunctions.

(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 to the ON position again, and same malfunction is detected again, the MIL illuminates.

(Seconds)

0.5

U340E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

(g) Freeze frame data records the engine conditions,

such as fuel system, calculated load, engine coolant temperature, fuel trim, engine speed and vehicle speed when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air/fuel ratio was lean or rich, and other data from the time the malfunction occurred.

(h) The intelligent tester records freeze frame data in

five different instances: 1) 3 times before the DTC is set, 2) once when the DTC is set, and 3) once after

0.5

the DTC is set. These data can be used to simulate the vehicle's conditions around the time when the malfunction occurred. The data may help find the cause of the malfunction, or judge if the DTC is being caused by a temporary malfunction or not.

A092901E12

AX–29

2. INSPECT DLC3

DLC3

(a) The ECM uses ISO 15765-4 for communication.

The terminal arrangement of the DLC3 complies

CANH

SG SIL

with SAE J1962 and matches the ISO 15765-4 format.

12345678

9 10111213141516

CANL

Symbols (Terminal No.) Terminal Description Condition Specified Condition

SIL (7) - SG (5) Bus "+" line During transmission Pulse generation

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

BAT (16) - Body ground Battery positive Always 11 to 14 V

CANH (6) - CANL (14) CAN bus line

CANH (6) - CG (4) HIGH-level CAN bus line

CANL (14) - CG (4) LOW-level CAN bus line

CANH (6) - BAT (16) HIGH-level CAN bus line

CANL (14) - BAT (16) LOW-level CAN bus line

BAT

A082779E81

Ignition switch OFF

54 to 69 Ω

200 Ω or higher

6 kΩ or higher

NOTICE:

: 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–30

U340E 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: If your display shows UNABLE TO CONNECT TO VEHICLE when you have connected the cable of the intelligent tester to the DLC3, turned the ignition switch to the ON position and operated the tester, there is a problem with the vehicle or the tester.

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

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

3. CHECK BATTERY VOLTAGE

(a) Measure the battery voltage.

Standard voltage:

11 to 14 V

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

4. CHECK MIL

(a) The MIL comes on when the ignition switch is

turned to the ON position and the engine is not running. HINT: If the MIL does not light up, troubleshoot the combination meter.

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

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

+ 245 hidden pages