No.12 Torque Converter Clutch (TCC) Non-Operation: Notes

12	Torque converter clutch (TCC) non-operation
DESCRIPTION	TCC does not operate when vehicle reaches TCC operation position.
POSSIBLE CAUSE	Basically, the TCC does not operate when the fail-safe is operating. Verify the DTC first. CAUTION: If the TCC is stuck, inspect it. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF. TCC burnt (1) Input sensor system malfunction TFT sensor VSS Input/turbine speed sensor Sensor GND (2) Output solenoid valve system malfunction (Sticking) Shift solenoid A malfunction Shift solenoid E malfunction (3) Control valve body malfunction system (Poor operation, stuck) TCC hydraulic pressure system APP sensor malfunction (Not operating linear) CKP sensor malfunction Input/turbine speed sensor or VSS malfunction Brake switch malfunction (Always ON) ECT sensor malfunction Excessive amount of ATF NOTE: Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION -- AUTOMATIC TRANSAXLE .) (See BASIC INSPECTION .)

Torque converter clutch (TCC) non-operation

DESCRIPTION

POSSIBLE CAUSE

Basically, the TCC does not operate when the fail-safe is operating. Verify the DTC first.
CAUTION:
- If the TCC is stuck, inspect it. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF.

TCC burnt
- (1) Input sensor system malfunction
  - TFT sensor
  - VSS
  - Input/turbine speed sensor
  - Sensor GND
- (2) Output solenoid valve system malfunction (Sticking)
  - Shift solenoid A malfunction
  - Shift solenoid E malfunction
- (3) Control valve body malfunction system (Poor operation, stuck)
  - TCC hydraulic pressure system
APP sensor malfunction (Not operating linear)
CKP sensor malfunction
Input/turbine speed sensor or VSS malfunction
Brake switch malfunction (Always ON)
ECT sensor malfunction
Excessive amount of ATF
NOTE:
- Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See ON-BOARD DIAGNOSTIC SYSTEM DTC INSPECTION -- AUTOMATIC TRANSAXLE .) (See BASIC INSPECTION .)