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.

EXCESSIVE SHIFT SHOCK FROM N TO D OR N TO R POSITION/RANGE - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Does shift shock occur only when engine cold?	Yes	Go to the next step.
1	Does shift shock occur only when engine cold?	No	Go to Step 3.
2	Inspect TFT sensor and related harness: vibration, intermittent open/short circuit. Is it okay?	Yes	Go to the next step.
2		No	Repair or replace part if necessary.
3	Is line pressure okay? (See LINE PRESSURE TEST .)	Yes	Go to the next step.
3	Is line pressure okay? (See LINE PRESSURE TEST .)	No	Repair or replace any malfunctioning parts according to inspection results.
4	Is stall speed okay? (See STALL SPEED TEST .)	Yes	Go to the next step.
4	Is stall speed okay? (See STALL SPEED TEST .)	No	Go to Step 6.
5	Inspect TR switch and related harness: vibration, intermittent open/short circuit. Is it okay?	Yes	Go to the next step.
5		No	Repair or replace part if necessary.
6	Stop engine and turn ignition switch on. Inspect pressure control solenoid circuit. Is it 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.)
6		No	Inspect for stuck pressure control solenoid. (See SOLENOID VALVE INSPECTION .)
7	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.