NO.12 TORQUE CONVERTER CLUTCH (TCC) NON-OPERATION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL]


12	Torque converter clutch (TCC) non-operation
DESCRIPTION	• TCC does not operate when vehicle reaches TCC operation range.
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. 1. TCC burned (1) Input sensor system malfunction • Transaxle fluid temperature sensor • Vehicle speed sensor • Input/turbine speed sensor • Sensor GND (2) Output solenoid valve system malfunction (Sticking) • Shift solenoid E malfunction • Shift solenoid A malfunction (3) Control valve body malfunction system (Poor operation, stuck) • TCC hydraulic pressure system 2. TP sensor malfunction (Not operating linear) 3. Accelerator pedal position sensor malfunction (Not operating linear) 4. Input/turbine speed sensor or vehicle speed sensor malfunction 5. Brake switch malfunction (Always ON) 6. ECT sensor malfunction Note • Before following troubleshooting steps, make sure that Automatic Transaxle On-Board Diagnostic and Automatic Transaxle Basic Inspection are conducted. (See BASIC INSPECTION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL].)


STEP	INSPECTION		ACTION
1	With ignition switch at ON, does gear position indicator light indication correspond to selector lever position?	Yes	Go to next step.
1		No	Go to No.27 "GEAR POSITION INDICATOR LIGHT DOES NOT ILLUMINATE IN M RANGE", or No.30 "GEAR POSITION INDICATOR LIGHT ILLUMINATES IN D RANGE OR P, N, R POSITIONS."
2	Check the value at the following. PCM PIDs (using WDS or equivalent): • APP1 • APP2 • TP_REL • VSS Terminal voltage: • TCM terminal 2I, 2K (TSS sensor) (See TCM INSPECTION (GENERAL (L.H.D.) SPECS. SPORT AT) [FN4A-EL].) Are they okay?	Yes	Go to next step.
2		No	Repair or replace any defective parts.
3	Disconnect TCM. Is resistance between ground terminal 1P or 1O at TCM connector and body ground less than 5.0 ohms?	Yes	Go to next step.
3		No	Repair harness.
4	Check resistance between shift solenoid A and E circuit terminal 1A, 1H at TCM connector and transaxle connector terminal A, F. Are the resistances less than 5.0 ohms?	Yes	Go to next step.
4		No	Repair shift solenoid A or E circuit. Reconnect TCM.
5	Inspect shift solenoid A and E. Are the shift solenoids operating properly?	Yes	Replace TCM.
5		No	Overhaul control valve body and repair or replace any defective parts. (See ATX Workshop Manual (FN4A-EL).) If problem remains, overhaul transaxle and repair or replace any defective parts. (See ATX Workshop Manual (FN4A-EL).)
6	• Verify test results. - If okay, return to diagnostic index to service any additional symptoms. - If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. • If vehicle repaired, troubleshooting completed. • If vehicle not repaired or additional diagnostic information not available, replace TCM.