Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

TORQUE CONVERTER CLUTCH (TCC) NON-OPERATION DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	With the ignition switch at the ON position, does the gear position indicator light indication correspond to the selector lever position?	Yes	Go to the next step.
1		No	Go to NO.29 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	Inspect the following values. (See PCM INSPECTION .) (See TCM INSPECTION .) PCM PIDs (using WDS or equivalent): APP1 APP2 TP_REL VSS TCM terminal voltage: 2G (turbine sensor) 2K (VSS) Are they normal?	Yes	Go to the next step.
2		No	Repair or replace any malfunctioning parts.
3	Disconnect the TCM connector. Is the resistance between ground terminal 2M or 2Q at the TCM connector and body ground 5.0 ohms or less ?	Yes	Go to the next step.
3		No	Repair the wiring harness.
4	Inspect the TFT sensor. (See TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR INSPECTION .) Is the TFT sensor normal?	Yes	Go to the next step.
4		No	Replace the TFT sensor.
5	Inspect the TCC solenoid. Is the TCC solenoid normal?	Yes	Go to the next step.
5	Inspect the TCC solenoid. Is the TCC solenoid normal?	No	Replace the TCC solenoid.
6	Remove the torque converter. Inspect the torque converter. (See AUTOMATIC TRANSMISSION REMOVAL/INSTALLATION .) (See AUTOMATIC TRANSAXLE RC4A-EL - OVERHAUL .) Is the torque converter normal?	Yes	Overhaul the control valve body and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE RC4A-EL - OVERHAUL .) If the problem remains, overhaul the transmission and repair or replace any malfunctioning parts. (See AUTOMATIC TRANSAXLE RC4A-EL - OVERHAUL .)
6		No	Replace the torque converter. (See AUTOMATIC TRANSMISSION REMOVAL/INSTALLATION .)
7	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 completed. If the vehicle is not repaired or additional diagnostic information is not available, replace the TCM. (See TCM REMOVAL/INSTALLATION .)