NO.27 TORQUE CONVERTER CLUTCH (TCC): NOT APPLIED [LA4AX-EL (CD4E)]

id0503a2806300

27

Torque converter clutch (TCC): not applied

POSSIBLE CAUSE

• Powertrain control system malfunction
• Control valve body malfunction
• Torque converter component malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
Powertrain control system
• Are there any malfunctions with the following?
- Electrical input/output
- Vehicle wiring harness
- PCM
- Transaxle fluid temperature (TFT) sensor
- TCC solenoid
- Brake switch
- Turbine shaft speed (TSS) sensor
Yes
Perform OBD test
Perform DTC troubleshooting
No
Go to the next step
2
Control valve body
• Do any of the following malfunctions exist?
- Bolts are not tightened to the specification
- Gaskets are damaged
- Solenoid pressure regulator valve, bypass clutch control valve and plunger, converter regulator valve are stuck, damaged, or misassembled
- TCC solenoid is malfunctioning or stuck
- Hydraulic passages are damaged
- Separator plates are damaged or blocked
Yes
Service if necessary
No
Go to the next step
3
Torque converter component
• Do either of the following malfunctions exist?
- Leakage
- Internal damage
Yes
Inspect the TCC operation
No
Replace the torque converter component
4
• Verify the test results.
- If normal, return to the diagnostic index to service any additional symptoms.
- If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
• If the vehicle is repaired, troubleshooting is completed.
• If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.