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 P0973 [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 TERMINAL COUPLE COMPONENT FOR POOR CONNECTION Turn the ignition switch to the LOCK position. Remove the TCM. (See TCM REMOVAL/INSTALLATION .) Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Are terminals normal?	Yes	Go to the next step.
3		No	Replace the couple component, then go to Step 7.
4	INSPECT RESISTANCE OF SHIFT SOLENOID A CIRCUIT Inspect for resistance between couple component terminal B5 (wiring harness-side) and ground. Is resistance within 11-15 ohms? (See SOLENOID VALVE INSPECTION .)	Yes	Go to go to Step 7.
4		No	Go to the next step.
5	INSPECT TERMINAL SHIFT SOLENOID A FOR POOR CONNECTION Disconnect the shift solenoid A connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Are terminals normal?	Yes	Go to the next step.
5		No	Replace the couple component, then go to Step 7.
6	INSPECT TERMINAL COUPLE COMPONENT CIRCUIT FOR SHORT TO GROUND Inspect for continuity between couple component terminal B5 and all terminals except B5 (wiring harness-side). Is there continuity?	Yes	Repair or replace the couple component, then go to the next step.
6		No	Replace the control valve body, then go to the next step. (See CONTROL VALVE BODY REMOVAL/INSTALLATION .)
7	VERIFY TROUBLESHOOTING OF DTC P0973 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 .)
7		No	Go to the next step.
8	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 .)
8		No	Troubleshooting completed.