Diagnostic procedure

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.

NO. 9 ABNORMAL SHIFTING [AW6A-EL] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Inspect for continuity between the TCM terminal A9 and battery negative terminal. Is there continuity?	Yes	Go to the next step.
1		No	Repair or replace ground circuit.
2	Inspect following shift solenoids. (See SOLENOID VALVE INSPECTION .) Shift solenoid C Shift solenoid D Shift solenoid E Line pressure control solenoid TCC control solenoid Shift solenoid F Are they normal?	Yes	Inspect the TCM terminal for bend, damage, corrosion or poor contact.
2		No	Inspect the coupler component. If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
3	Verify test results. If normal, return to the diagnostic index to service any additional symptoms. If 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.