Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0506 [AJ] 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 FREEZE FRAME DATA on repair order, then go to the next step.
2	VERIFY RELATED SERVICE 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 the vehicle is not repaired, then go to the next step.
2		No	Go to the next step.
3	VERIFY RELATED PENDING OR STORED DTCs Turn ignition switch to OFF, then ON (Engine off). Verify pending code or stored DTCs using the WDS or equivalent. Is other DTC present?	Yes	Repair applicable DTCs. (See DTC TABLE .)
3		No	Go to the next step.
4	INSPECT A/C MAGNET CLUTCH OPERATION Turn blower motor switch off. Is magnet clutch still on?	Yes	Refer to "A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY" of ENGINE SYMPTOM TROUBLESHOOTING, then go to Step 9. (See NO. 24 A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY .)
4		No	Go to the next step.
5	INSPECT PURGE SOLENOID VALVE Inspect purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION .) Is there any malfunction?	Yes	Replace purge solenoid valve, then go to Step 9.
5		No	Go to the next step.
6	INSPECT AIR CLEANER ELEMENT Remove air cleaner element with engine running. Is engine speed increased?	Yes	Replace air cleaner element, then go to Step 9.
6		No	Go to the next step.
7	INSPECT ENGINE COMPRESSION Inspect engine compression. (See COMPRESSION INSPECTION .) Is engine compression normal?	Yes	Go to the next step.
7		No	Overhaul engine, then go to Step 9.
8	INSPECT GENERATOR Inspect generator. (See GENERATOR INSPECTION .) Is there any malfunction?	Yes	Replace generator, then go to the next step. (See GENERATOR REMOVAL/INSTALLATION .)
8		No	Go to the next step.
9	VERIFY TROUBLESHOOTING OF DTC P0506 COMPLETED Make sure to reconnect all disconnected connectors. Start engine. Clear the DTC from the PCM memory using the WDS or equivalent. Depress brake pedal for 14 s or more. Is PENDING CODE same as DTC present?	Yes	Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
9		No	Go to the next step.
10	VERIFY AFTER REPAIR PROCEDURE Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
10		No	Troubleshooting completed.