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.

DTC P0942 [AW6A-EL] DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has the FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED REPAIR INFORMATION AVAILABILITY Verify related Service Bulletins and or/on-line repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT LINE PRESSURE Start the engine. Measure the line pressures. (See LINE PRESSURE TEST .) Specification D, M range Idle: 350-410 kPa {3.6-4.1 kgf/cm ² , 51-59 psi} Stall: 1,375-1,465 kPa {14.1-14.9 kgf/cm ² , 200-212 psi} R position Idle: 380-670 kPa {6.0-6.8 kgf/cm ² , 85-97 psi} Stall: 1,870-2,090 kPa {19.1-21.3 kgf/cm ² , 272-303 psi} Are the line pressures within the specifications?	Yes	Go to the next step.
3		No	All ranges: Replace the oil pump, then go to Step 6. Any ranges: Replace the control valve body, then go to Step 6. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
4	INSPECT STALL SPEED Measure the stall speed in D range. (See STALL TEST .) Specification 2,480 rpm Is the stall speed within the specification?	Yes	Go to the next step.
4		No	Replace the automatic transaxle, then go the Step 6. (See AUTOMATIC TRANSAXLE REMOVAL/INSTALLATION .)
5	INSPECT SOLENOID VALVE Inspect the solenoid valve. (See SOLENOID VALVE INSPECTION .) Is it normal?	Yes	Go to the next step.
5		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
6	VERIFY TROUBLESHOOTING OF DTC P0942 COMPLETED Make sure to reconnect all the disconnected connectors. Clear the DTC from the memory using the WDS or equivalent. Drive the vehicle in D range and make sure that gears shift smoothly from 1GR to 6GR. Is same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION .)
6		No	Go to the next step.
7	VERIFY AFTER REPAIR PROCEDURE Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
7		No	Troubleshooting completed.