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	Go to symptom troubleshooting No. 5 "ENGINE STALLS-AFTER START/AT IDLE". (See NO. 5 ENGINE STALLS-AFTER START/AT IDLE [MZI-3.7] .) Is the engine control system normal?	Yes	Go to the next step.
1		No	Repair or replace any malfunctioning parts according to the inspection results.
2	Remove the torque converter (See TORQUE CONVERTER REMOVAL/INSTALLATION [AW6A-EL] .) Inspect the torque converter Is the torque converter normal?	Yes	Inspect for bending, damage, corrosion or kinks of the oil cooler pipes If normal, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL] .) If problem remains, overhaul the transaxle and repair or replace any malfunctioning parts (See .)
2		No	Replace the torque converter
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.