Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE FLARES UP OR SLIPS WHEN UPSHIFTING OR DOWNSHIFTING - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Is line pressure okay? (See LINE PRESSURE TEST .)	Yes	Go to the next step.
1	Is line pressure okay? (See LINE PRESSURE TEST .)	No	Repair or replace any malfunctioning parts according to inspection results.
2	Is shift point okay? (See ROAD TEST .)	Yes	Go to the next step.
2	Is shift point okay? (See ROAD TEST .)	No	Go to symptom troubleshooting NO.9 ABNORMAL SHIFTING .
3	Stop engine. Inspect shift solenoid A, B, or C circuit. Are they okay?	Yes	Overhaul control valve body and repair or replace any malfunctioning parts. (See appropriate Automatic Transmission article.) If problem remains, replace or overhaul transaxle and repair or replace any malfunctioning parts. (See appropriate Automatic Transmission article.)
3		No	Inspect for stuck shift solenoid. (See SOLENOID VALVE INSPECTION .)
4	Verify test results. If okay, return to DIAGNOSTIC INDEX to service any additional symptoms. If malfunction remains, inspect related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If vehicle is repaired, troubleshooting completed. If vehicle is not repaired or additional diagnostic information not available, replace TCM.