Diagnostic procedure

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 - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Turn ignition switch to ON. Does O/D OFF indicator light indication correspond to O/D OFF switch operation?	Yes	Go to the next step.
1		No	Go to symptom troubleshooting NO.26 O/D OFF INDICATOR LIGHT DOES NOT ILLUMINATE WHEN O/D OFF SWITCH IS TURNED ON , or NO.27 O/D OFF INDICATOR LIGHT ILLUMINATES WHEN O/D OFF SWITCH IS NOT TURNED ON .
2	Disconnect TCM. Is resistance between TCM ground terminals 1C, 1Y and body ground is less than 5.0 ohm?	Yes	Go to the next step.
2		No	Repair open ground circuit.
3	Remove torque converter. Inspect torque converter. (See appropriate Automatic Transmission article.) Is torque converter okay?	Yes	Overhaul control valve body and repair or replace any malfunctioning parts. (See appropriate Automatic Transmission article.) If problem remains, replace or overhaul transaxle and repair or replace any malfunctioning parts. (See appropriate Automatic Transmission article.)
3		No	Replace torque converter.
4	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 is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information not available, replace TCM.