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

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DESCRIPTION AND POSSIBLE CAUSE

12	Torque converter clutch (TCC) non-operation
DESCRIPTION	TCC does not operate when vehicle reaches TCC operation range.
POSSIBLE CAUSE	Basically, TCC does not operate when the fail-safe is operating. Verify the DTC at first. If the TCC operates when driving at high speeds only, the malfunction (improper adjustment) is in the M range switch circuit or TR switch circuit. 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 slippage, burnt Line pressure low Incorrect throttle position signal Input/turbine speed sensor malfunction VSS malfunction Output solenoid valve system malfunction (Sticking) TCC control solenoid malfunction Control valve body system malfunction (Poor operation, sticking) TCC hydraulic pressure system malfunction Accelerator pedal position sensor malfunction (Not operating linearly) Input/turbine speed sensor or VSS malfunction Operation of fail-safe function. Short to power or GND at TCC control solenoid related circuit. NOTE: Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION .)

Torque converter clutch (TCC) non-operation

DESCRIPTION

TCC does not operate when vehicle reaches TCC operation range.

POSSIBLE CAUSE

Basically, TCC does not operate when the fail-safe is operating. Verify the DTC at first. If the TCC operates when driving at high speeds only, the malfunction (improper adjustment) is in the M range switch circuit or TR switch circuit.
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 slippage, burnt
- Line pressure low
  - Incorrect throttle position signal
  - Input/turbine speed sensor malfunction
  - VSS malfunction
  - Output solenoid valve system malfunction (Sticking)
  - TCC control solenoid malfunction
  - Control valve body system malfunction (Poor operation, sticking)
  - TCC hydraulic pressure system malfunction
Accelerator pedal position sensor malfunction (Not operating linearly)
Input/turbine speed sensor or VSS malfunction
Operation of fail-safe function.
- Short to power or GND at TCC control solenoid related circuit.
NOTE:
- Before following the troubleshooting steps, make sure that the Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION .)