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	VERIFY RELATED PENDING AND STORED DTC Switch the ignition to off, then to ON (engine off). Verify pending and stored DTCs using the M-MDS Are any other DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [L5] .)
2		No	Go to the next step.
3	INSPECT A/C MAGNETIC CLUTCH OPERATION Turn the fan switch off. Is the magnetic clutch still on?	Yes	Perform the "A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY" (See NO. 24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5] .)
3		No	Go to the next step
4	INSPECT GENERATOR CONTROL CIRCUIT MALFUNCTION Apply the electrical load. Is the engine speed increased?	Yes	Go to the next step
4		No	Repair the generator control circuit for short to power supply, then go to Step 8.
5	INSPECT AIR CLEANER ELEMENT Remove the air cleaner element with the engine running Is the engine speed increased?	Yes	Clean or replace the air cleaner element, then go to Step 8.
5		No	Go to the next step
6	INSPECT THROTTLE BODY PASSAGE Visually inspect the throttle body passage? Is the throttle body passage clogged?	Yes	Clean or replace the throttle body passage, then go to Step 8.
6		No	Go to the next step.
7	INSPECT ENGINE COMPRESSION Inspect engine compression. (See COMPRESSION INSPECTION [L5] .) Is there any malfunction?	Yes	Overhaul the engine for repairs, then go to the next step.
7		No	Go to the next step.
8	VERIFY DTC TROUBLESHOOTING COMPLETED 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.