Diagnostic Procedure
- If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
- Verify Related Repair Information Availability - Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
- Classify Intermittent Or Continuous Concern -
Clear DTC from PCM memory using WDS or equivalent. Drive vehicle under following conditions:
- Engine coolant temperature is more than 145°F (63°C)
- Engine speed: less than 3750 RPM
- Throttle opening angle is as follows:
- Engine speed less than 1500 RPM : more than 35 percent
- Engine speed between 1500-2500 RPM : between 25-35 percent
- Engine speed more than 2500 RPM: less than 25 percent
- Verify Other Stored DTCs - Verify other stored DTCs using WDS or equivalent. If other DTCs are not present, go to next step. If DTC P2088 or P2089 is present, diagnose and repair those DTCs first. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS .
- Inspect VTCS Solenoid Valve - Perform VTCS Solenoid Valve Inspection. Refer to VARIABLE TUMBLE CONTROL SYSTEM - MAZDA6 (2.3L) under AIR INDUCTION SYSTEMS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If VTCS solenoid valve is okay, go to next step. If VTCS solenoid valve is faulty, replace VTCS solenoid valve. After repair, go to step 9.
- Inspect VTCS Shutter Valve Actuator - Perform VTCS Shutter Valve Actuator Inspection. Refer to VARIABLE TUMBLE CONTROL SYSTEM - MAZDA6 (2.3L) under AIR INDUCTION SYSTEMS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If VTCS shutter valve actuator is okay, go to next step. If VTCS shutter valve actuator is faulty, replace VTCS shutter valve actuator. After repair, go to step 9.
- Inspect VTCS Shutter Valve Switch - Perform VTCS Shutter Valve Switch Inspection. Refer to VARIABLE TUMBLE CONTROL SYSTEM - MAZDA6 (2.3L) under AIR INDUCTION SYSTEMS in SYSTEM & COMPONENT TESTING - MAZDA6, MIATA, MPV, PROTEGE & PROTEGE5 article. If VTCS shutter valve switch is okay, go to next step. If VTCS shutter valve switch is faulty, replace intake manifold. After repair, go to step 9.
- Verify Connection Of Vacuum Hose Routing - Verify vacuum hoses are connected properly. Refer to VACUUM DIAGRAMS article. If vacuum hoses connected properly, go to next step. If vacuum hoses are not connected properly, reconnect all vacuum hoses correctly. After repair, go to next step.
- Verify Trouble Shooting Of DTC P2004 Completed -
Make sure to reconnect all disconnected connectors. Start engine. Clear DTC from PCM memory using WDS or equivalent. Start engine. Drive vehicle under following conditions:
- Engine coolant temperature is more than 145°F (63°C)
- Engine speed: below 3750 RPM
Ensure throttle opening angle is as follows:
- Engine speed less than 1500 RPM: more than 35 percent
- Engine speed between 1500-2500 RPM: between 25-35 percent
- Engine speed more than 2500 RPM: less than 25 percent
- Verify After Repair Procedure - Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.