Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0715 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 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 TURBINE SENSOR CONNECTOR FOR POOR CONNECTION Turn the ignition switch to the LOCK position. Disconnect the turbine sensor connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Are the connector and terminals normal?	Yes	Go to the next step.
3		No	Repair or replace the connector and/or terminal, then go to Step 10.
4	INSPECT TURBINE SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch to the ON position (engine off). Inspect the voltage at turbine sensor connector terminal B. Is the terminal voltage B+ ?	Yes	Go to the next step.
4		No	Repair or replace the wiring harness, then go to Step 10.
5	INSPECT TURBINE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT Turn the ignition switch to the LOCK position. Inspect for continuity between the turbine sensor (wiring harness-side) terminal C and body ground. Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness, then go to Step 10.
6	INSPECT TCM CONNECTOR FOR POOR CONNECTION Disconnect the TCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Are the connector and terminals normal?	Yes	Go to the next step.
6		No	Repair or replace the connector and/or terminal, then go to Step 10.
7	INSPECT TURBINE SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between the turbine sensor (wiring harness-side) terminal A and TCM (wiring harness-side) terminal 2G. Is there continuity?	Yes	Go to the next step.
7		No	Repair or replace the wiring harness, then go to Step 10.
8	INSPECT TURBINE SENSOR SIGNAL CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the turbine sensor (wiring harness-side) terminal A and body ground. Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness, then go to Step 10.
9	INSPECT TURBINE SENSOR Inspect the turbine sensor. (See TURBINE SENSOR INSPECTION .) Is the turbine sensor normal?	Yes	Go to the next step.
9		No	Replace the turbine sensor, then go to Step 10. (See TURBINE SENSOR REMOVAL/INSTALLATION .)
10	VERIFY TROUBLESHOOTING OF DTC P0715 COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the TCM memory using the WDS or equivalent. Drive the vehicle with vehicle speed of 40 km/h {25 mph} or more and engine speed of 1,500 rpm or more for 2 s or more . Is the same DTC present?	Yes	Replace the TCM, then go to the next step. (See TCM REMOVAL/INSTALLATION .)
10		No	Go to the next step.
11	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 .)
11		No	DTC troubleshooting completed.