Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

DTC P02004 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 the FREEZE FRAME DATA on the 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 APV CONTROL SYSTEM OPERATION Perform the "APV Control Inspection". (See AUXILIARY PORT VALVE (APV) CONTROL INSPECTION .) Is there any malfunction?	Yes	Repair or replace the malfunctioning parts according to the inspection results. Then go to the Step 5.
3		No	Go to the next step.
4	INSPECT APV MOTOR Inspect the APV motor. (See AUXILIARY PORT VALVE (APV) MOTOR INSPECTION (13B-MSP (HIGH POWER)) .) Is there any malfunction?	Yes	Replace the APV motor, then go to the next step. (See INTAKE MANIFOLD DISASSEMBLY/ASSEMBLY .)
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING OF DTC P2004 COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the WDS or equivalent. Start the engine. Is the PENDING CODE same as DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION .)
5		No	Go to the next step.
6	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE .)
6		No	DTC troubleshooting completed.