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 FUSE Switch the ignition to off. Disconnect the negative battery cable. Remove the PCM 10 A fuse Inspect the fuse Is there any malfunction?	Yes	Replace the fuse, then go to Step 8
3		No	Go to the next step.
4	INSPECT MAIN RELAY Remove the main relay Inspect the main relay (See RELAY INSPECTION ) Is there any malfunction?	Yes	Replace the main relay, then go to Step 8
4		No	Go to the next step
5	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 8
5		No	Go to the next step.
6	INSPECT MAIN RELAY CIRCUIT FOR SHORT TO POWER SUPPLY Install the fuse Reconnect the negative battery cable Switch the ignition to ON (engine off). Measure the voltage between the following terminals and body ground Main relay terminal D (wiring harness-side) Main relay terminal B (wiring harness-side) Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 8
6		No	Go to the next step
7	INSPECT MAIN RELAY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Switch the ignition to off Install the main relay Measure the voltage between the following terminals and body ground PCM terminal 1A (wiring harness-side) PCM terminal 1Q (wiring harness-side) Is the voltage B+ ?	Yes	Go to the next step
7		No	Repair or replace the wiring harness for a possible short to ground or open circuit, then go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. Perform the 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] .)
8		No	Go to the next step.
9	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] .)
9		No	DTC troubleshooting completed