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

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

TORQUE CONVERTER CLUTCH (TCC) NON-OPERATION - DESCRIPTION AND POSSIBLE CAUSES

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 fail-safe is operating. Verify DTC at first. If TCC operates when driving at high speeds only, there is malfunction (improper adjustment) in O/D OFF switch circuit, or TR switch circuit. NOTE: If the TCC or piston is stuck, inspect them. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF. TCC piston slipped, burned Line pressure low Incorrect throttle position signal Input/turbine speed sensor malfunction TFT sensor malfunction Sensor ground malfunction VSS malfunction Malfunction of output solenoid valve system (Sticking) TCC solenoid valve malfunction Malfunction of control valve body system (Poor operation, sticking) TCC piston hydraulic pressure system malfunction Malfunction of TP sensor (Not operating linearly) Malfunction of input/turbine speed sensor or VSS NOTE: Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.

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 fail-safe is operating. Verify DTC at first. If TCC operates when driving at high speeds only, there is malfunction (improper adjustment) in O/D OFF switch circuit, or TR switch circuit.
NOTE:
- If the TCC or piston is stuck, inspect them. In addition, inspect the oil cooler for foreign particles which may have mixed in with the ATF.
TCC piston slipped, burned
- Line pressure low
  - Incorrect throttle position signal
  - Input/turbine speed sensor malfunction
  - TFT sensor malfunction
  - Sensor ground malfunction
  - VSS malfunction
  - Malfunction of output solenoid valve system (Sticking)
  - TCC solenoid valve malfunction
  - Malfunction of control valve body system (Poor operation, sticking)
  - TCC piston hydraulic pressure system malfunction
Malfunction of TP sensor (Not operating linearly)
Malfunction of input/turbine speed sensor or VSS
NOTE:
- Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted.