Diagnostic procedure

WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

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 FREEZE FRAME DATA on 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 KS CONNECTOR CONDITION Switch the ignition to off. Disconnect the KS connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 9
3		No	Go to the next step.
4	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 9.
4		No	Go to the next step.
5	INSPECT KS CIRCUIT FOR SHORT TO GROUND Inspect for continuity between the following terminals and body ground: KS terminal A (wiring harness-side) KS terminal B (wiring harness-side) Is there continuity?	Yes	Repair or replace the wiring harness for a possible short to ground, then go to Step 9.
5		No	Go to the next step.
6	INSPECT KS CIRCUITS FOR SHORT EACH OTHER Inspect for continuity between KS terminals A and B (wiring harness-side). Is there continuity?	Yes	Repair or replace the malfunctioning wiring harness, then go to Step 9.
6		No	Go to the next step.
7	INSPECT KS Inspect the KS. (See KNOCK SENSOR (KS) INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the KS, then go to Step 9. (See KNOCK SENSOR (KS) REMOVAL/INSTALLATION [L5] .)
7		No	Go to the next step.
8	INSPECT KS CIRCUIT FOR OPEN CIRCUIT Inspect for continuity between the following terminals: KS terminal A (wiring harness-side) and PCM terminal 2U (wiring harness-side) KS terminal B (wiring harness-side) and PCM terminal 2V (wiring harness-side) Is there continuity?	Yes	Go to the next step.
8		No	Repair or replace the wiring harness for a open circuit, then go to the next step.
9	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors Clear the DTC from the PCM memory using the M-MDS. Perform the KOEO/KOER self test. (See KOEO/KOER SELF TEST [L5] .) Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L5] .)
9		No	Go to the next step
10	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [L5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
10		No	DTC troubleshooting completed.