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	Does the shift shock occur only when the engine is cold?	Yes	Go to the next step.
1	Does the shift shock occur only when the engine is cold?	No	Go to Step 3.
2	Inspect the TFT sensor and related wiring harness- vibration, intermittent open/short circuit (See TRANSAXLE FLUID TEMPERATURE (TFT) SENSOR INSPECTION [AW6A-EL] .) Is it normal?	Yes	Go to the next step.
2		No	Repair or replace part if necessary.
3	Perform the initial learning procedure. (See INITIAL LEARNING .) Does symptom eliminate?	Yes	Troubleshooting is completed.
3		No	Go to the next step.
4	Is the line pressure normal? (See MECHANICAL SYSTEM TEST [AW6A-EL] .)	Yes	Go to the next step.
4		No	Repair or replace any malfunctioning parts according to the inspection results.
5	Is stall speed normal? (See MECHANICAL SYSTEM TEST [AW6A-EL] .)	Yes	Go to the next step.
5		No	Repair or replace any malfunctioning parts according to the inspection results.
6	Stop the engine. Inspect following solenoids. (See SOLENOID VALVE INSPECTION [AW6A-EL] .) Line pressure control solenoid Shift solenoid C Shift solenoid E Are they normal?	Yes	Inspect the ATF condition. If large amount of metal specks are found, overhaul the transaxle and repair or replace any malfunctioning parts. (See .) If a large amount of metal specks are not found, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL] .)
6		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION [AW6A-EL] .)
7	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.