Toyota Camry 2007-2009 Service Manual - U250E_Automatic_Transaxle

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

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

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

AX–4

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.

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

SHIFT SOLENOID VALVE

(NC)

SLT

SPEED SENSOR

ECM

SHIFT SOLENOID VALVE

(NT)

TRANSMISSION WIRE

(ATF TEMPERATURE SENSOR)

SHIFT SOLENOID VALVE

DSL

SL2

SL1

C136787E01

AX–6

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

THW

VTA1, 2

4, L

NSW, P

R, D, 3, 2

ECM

SL1

SL2

SL3

SLT

Shift Solenoid Valve SL1

Shift Solenoid Valve SL2

Shift Solenoid Valve SL3

Shift Solenoid Valve SLT

Shift Solenoid Valve S4

Combination Meter

Speed Sensor NC

Speed Sensor NT

Stop Light Switch Assembly

ATF (Automatic Transmission Fluid)

SPD

STP

TH01

DSL

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

AX–8

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

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

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).

Problem Symptom Confirmation

HINT: (See page AX-9).

Symptom does not occur: Go to step 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

Basic Inspection

Mechanical System Test

Hydraulic Test

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

HINT: (See page AX-12).

HINT: (See page AX-14).

Go to step 19

Go to step 16

Manual Shifting Test

HINT: (See page AX-15).

Go to step 16

Go to step 15

AX–10

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

Problem Symptoms Table Chapter 1

HINT: (See page AX-19).

Problem Symptoms Table Chapter 2

HINT: (See page AX-19).

Part Inspection

DTC Chart

Go to step 18

Go to step 19

End

HINT: (See page AX-35).

Circuit Inspection

Repair or Replace

Confirmation Test

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

AX–12

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.

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.

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

AX–14

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

(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 →

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

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

, psi)

, 54 to 60 psi)

(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

, 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

, psi)

, 97 to 108 psi)

, 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

AX–18

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

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:

AX–19

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U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

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

AX–22

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)

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).

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–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–26

U250E AUTOMATIC TRANSAXLE – AUTOMATIC TRANSAXLE SYSTEM

TERMINALS OF ECM

1. ECM

C24 A24





















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

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–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

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

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–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

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.

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Toyota Camry 2007-2009 Service Manual - U250E_Automatic_Transaxle

Specifications and Main Features

Frequently Asked Questions

User Manual