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.

DTC P0712 - DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED Has 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 Check for related Service Bulletins and/or online repair information availability. Is any related repair information available?	Yes	Perform repair or diagnosis according to the available repair information. If vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	VERIFY CURRENT INPUT SIGNAL STATUS - IS CONCERN INTERMITTENT OR CONSTANT? Turn ignition switch to OFF. Connect voltmeter to TCM terminal 1F. Turn ignition switch to ON (engine OFF). Are TCM terminal voltage within 0.2-4.9 V?	Yes	Go to intermittent concern troubleshooting procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING .)
3		No	Go to the next step.
4	INSPECT TERMINAL CONDITION Turn ignition switch to OFF. Disconnect the terminal component No. 2. Inspect for bent terminals. Is there any malfunction?	Yes	Repair or replace the terminals, then go to Step 9. If terminals cannot be repaired, replace the harness, then go to Step 9.
4		No	Go to the next step.
5	INSPECT TFT SENSOR CIRCUIT Turn ignition switch to ON (engine OFF). Verify if TCM terminal voltage changes to 4.9 V or above when terminal component No. 2 disconnected. Does TCM terminal voltage change?	Yes	Go to the next step.
5		No	Go to Step 8.
6	INSPECT COUPLER COMPONENT (8-PIN) TERMINALS CONDITION Turn ignition switch to OFF. Disconnect the coupler component (8-pin) connector. Inspect bent coupler component (8-pin) terminals. Is there any malfunction?	Yes	Repair or replace the connector and/or terminal.
6		No	Go to the next step.
7	INSPECT COUPLER COMPONENT (8-PIN) CIRCUIT FOR SHORT TO GROUND Check continuity between coupler component (8-pin) terminals (part-side) and body ground. I and body ground J and body ground Is there continuity?	Yes	Replace the TFT sensor, then go to Step 9.
7		No	Repair or replace the coupler component, then go to Step 9.
8	INSPECT TERMINAL COMPONENT NO. 2 (8-PIN) CIRCUIT FOR SHORT TO GROUND Turn ignition switch to OFF. Check continuity between terminal component No. 2 terminal G (harness-side) and body ground. Is there continuity?	Yes	Repair or replace the harness, then go to the next step.
8		No	Go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0712 COMPLETED Make sure to reconnect all disconnected connectors. Clear DTC from memory using WDS or equivalent. Drive vehicle under following condition for 150 s or more . Vehicle speed (VSS PID): 20 km/h {12 mph} Is same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE .) Is there any DTC present?	Yes	Go to the applicable DTC inspection.
10		No	Troubleshooting completed.