Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

STEP	INSPECTION		ACTION
1	When the vehicle is stopped on a flat, level road and the engine off, does the vehicle move when pushed? (in D range or N, R positions with the brake pedal released)	Yes	Go to the next step.
1		No	Inspect for parking mechanism.
2	Start the engine Does vehicle move when selector lever in between N position and D range?	Yes	Inspect or adjust selector lever. (See SELECTOR LEVER COMPONENT INSPECTION .) (See SELECTOR CABLE ADJUSTMENT .) Perform N position learning. (See TCM REMOVAL/INSTALLATION [AW6A-EL] .)
2		No	Go to the next step.
3	Stop the engine Inspect following solenoid (See SOLENOID VALVE INSPECTION [AW6A-EL] .) Shift solenoid C Shift solenoid D Shift solenoid E Shift solenoid F Line pressure control solenoid Are these normal?	Yes	Overhaul the transaxle and repair or replace any malfunctioning parts, (clutch slippage, worn) (See Automatic Transaxle and Transfer Workshop Manual AW6A-EL AW6AX-EL)
3		No	Inspect the coupler component If normal, replace the control valve body (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL] .)
4	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.