Toyota Tundra. Manual — part 2786

a. The Electronic Controlled Automatic Transmission (ECT) is an automatic transmission that

electronically controls shift timing using the Engine Control Module (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 is reduced by controlling the engine and transmission simultaneously. In
addition, the ECT has the following features:



Diagnostic function.



Fail-safe function when a malfunction occurs.

HOW TO PROCEED WITH TROUBLESHOOTING

HINT:



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



*: Use the Techstream.

1. VEHICLE BROUGHT TO WORKSHOP

2. CUSTOMER PROBLEM ANALYSIS

3. INSPECT BATTERY VOLTAGE

Standard voltage: 11 to 14 V

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

4. CONNECT TECHSTREAM TO DLC3*

5. CHECK AND CLEAR DTCS AND FREEZE FRAME DATA*

a. Refer to DTC CHECK/CLEAR .

6. VISUAL INSPECTION

7. SETTING CHECK MODE DIAGNOSIS*

a. Refer to CHECK MODE PROCEDURE .

8. PROBLEM SYMPTOM CONFIRMATION

a. Refer to ROAD TEST .

Result

RESULT REFERENCE

B: GO TO STEP 10

Result

Proceed to

Symptom does not occur

A

Symptom occurs

B

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

A: Go to next step.

9. SYMPTOM SIMULATION

a. Refer to ELECTRONIC CIRCUIT INSPECTION PROCEDURE .

10. DTC CHECK*

a. Refer to DTC CHECK/CLEAR .

Result

RESULT REFERENCE

B: GO TO STEP 18

A: Go to next step.

11. BASIC INSPECTION

a. Refer to ADJUSTMENT .

b. Refer to ON-VEHICLE INSPECTION .

c. Refer to the Shift Lever Assembly.



for Column Shift Type, refer to the following procedures (see ON-VEHICLE
INSPECTION )



for Floor Shift Type, refer to the following procedures (see ON-VEHICLE INSPECTION )

NG: GO TO STEP 21

OK: Go to next step.

12. MECHANICAL SYSTEM TESTS

a. Refer to MECHANICAL SYSTEM TESTS .

NG: GO TO STEP 17

OK: Go to next step.

13. HYDRAULIC TEST

a. Refer to HYDRAULIC TEST .

NG: GO TO STEP 17

OK: Go to next step.

Result

Proceed to

DTC is not output

A

DTC is output

B

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

14. MANUAL SHIFTING TEST

a. Refer to MANUAL SHIFTING TEST .

NG: GO TO STEP 16

OK: Go to next step.

15. PROBLEM SYMPTOMS TABLE CHAPTER 1

a. Refer to PROBLEM SYMPTOMS TABLE

NG: GO TO STEP 19

OK: Go to next step.

16. PROBLEM SYMPTOMS TABLE CHAPTER 2

a. Refer to PROBLEM SYMPTOMS TABLE .

17. PART INSPECTION

NG: GO TO STEP 21

OK: Go to next step.

18. DTC TABLE

a. Refer to DIAGNOSTIC TROUBLE CODE TABLE .

19. CIRCUIT INSPECTION

20. IDENTIFICATION OF PROBLEM

21. REPAIR OR REPLACE

22. CONFIRMATION TEST

NEXT: END

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 transmission 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

a. D position test

NOTE:

Perform the test at the normal operating ATF temperature of 50 to 80°C
(122 to 176°F).

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra

Shift into the D position, fully depress the accelerator pedal and check the following points.

1. Check up-shift operation.

Check that the 1 --> 2, 2 --> 3, 3 --> 4, 4 --> 5 and 5 --> 6 up-shifts take place at the shift
points shown in the automatic shift schedule (see SERVICE DATA ).

HINT:

6th Gear Up-shift Prohibition Control



The engine coolant temperature is less than 60°C (140°F) and the vehicle speed is less
than 55 km/h (34 MPH).

5th Gear Up-shift Prohibition Control



The engine coolant temperature is less than 55°C (131°F) and the vehicle speed is less
than 51 km/h (32 MPH).

4th Gear Up-shift Prohibition Control



The engine coolant temperature is less than 47°C (117°F) and the vehicle speed is less
than 49 km/h (30 MPH).

Lock-up Prohibition Control



The brake pedal is depressed.



The accelerator pedal is released.



The engine coolant temperature is less than 60°C (140°F).



Lock-up in 5th or 6th gear is not engaged when the shift position is S4.



Lock-up in 6th gear is not engaged when shift position is S5.



Lock-up in 3rd or 2nd gear is engaged when the ATF temperature is more than 125°C
(257°F).



Lock-up control during acceleration is not engaged when the shift position is S1, or in
1st gear.

2. Check for shift shock and slippage.

Check for shock and slippage at the 1 --> 2, 2 --> 3, 3 --> 4, 4 --> 5 and 5 --> 6 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, 4 -->
5 and 5 --> 6 while driving with the shift lever in the D position, and also check while driving
in the lockup condition.

2009 Toyota Tundra

2009 TRANSMISSION AB60F Automatic Transaxle - Tundra