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 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.
1		No	Go to the next step
2	INSPECT FUSE Switch the ignition to off. Disconnect the negative battery cable. Remove the MAIN 125 A fuse. Inspect the fuse Is there any malfunction?	Yes	Replace the fuse, then go to Step 7
2		No	Go to the next step.
3	INSPECT BATTERY Inspect the battery (See BATTERY INSPECTION [L5] .) Is there any malfunction?	Yes	Recharge or replace the battery, then go to Step 7 (See BATTERY RECHARGING [L5] .) (See BATTERY REMOVAL/INSTALLATION [L5] .)
3		No	Go to the next step
4	INSPECT GENERATOR CONNECTOR CONDITION Disconnect the generator 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 7.
4		No	Go to the next step.
5	INSPECT GENERATOR Inspect the generator. (See GENERATOR INSPECTION [L5] .) Is there any malfunction	Yes	Replace the generator, then go to Step 7. (See GENERATOR REMOVAL/INSTALLATION [L5] .)
5		No	Go to the next step.
6	INSPECT BATTERY CHARGING CIRCUIT FOR OPEN CIRUCIT Install the fuse Reconnect the disconnected connectors. Reconnect the negative battery cable. Switch the ignition to ON (engine off) Measure the voltage between generator terminal B (wiring harness-side) and body ground. Is the voltage B+ ?	Yes	Go to the next step.
6		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
7	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] .)
7		No	Go to the next step.
8	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] .)
8		No	DTC troubleshooting completed.