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. 14 ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING [AW6A-EL] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Is the line pressure normal? (See LINE PRESSURE TEST .)	Yes	Go to the next step.
1	Is the line pressure normal? (See LINE PRESSURE TEST .)	No	Repair or replace any malfunctioning parts according to the inspection results.
2	Is shift point normal? (See ROAD TEST .)	Yes	Go to the next step.
2	Is shift point normal? (See ROAD TEST .)	No	Go to No. 9 "NO. 9 ABNORMAL SHIFTING ".
3	Stop the engine. Inspect following 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 ATF condition. If a large amount of metal specks are found, replace the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .) If a large amount of metal specks are not found, replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
3		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
4	Inspect the coupler component for open or short. Are coupler component normal?	Yes	Go to the next step.
4		No	Replace the coupler component.
5	Inspect the ATF condition. Are a large amount of specks found?	Yes	Replace the transaxle. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
5		No	Replace the control valve body. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
6	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.