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 FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED Have FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS (EGR system related) been recorded?	Yes	Go to the next step.
1		No	Record FREEZE FRAME DATA and DIAGNOSTIC MONITORING TEST RESULTS on 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	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] .)
3		No	Go to the next step.
4	INSPECT MAP SENSOR Inspect the MAP sensor. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the MAP sensor, then go to Step 7. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION [L5] .)
4		No	Go to the next step.
5	INSPECT EGR VALVE Inspect the EGR valve. (See EGR VALVE INSPECTION [L5] .) Is there any malfunction?	Yes	Replace the EGR valve, then go to Step 7. (See EGR VALVE REMOVAL/INSTALLATION [L5] .)
5		No	Go to the next step.
6	INSPECT EGR VALVE PASSAGE Switch the ignition to off. Remove the EGR valve. Visually inspect the gasket installation of EGR valve and EGR valve passage for clogging. Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection result, then go to the next step.
6		No	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 DRIVE Mode 02 (EGR system Repair Verification Drive Mode). (See OBD-II DRIVE MODE [L5] .) Stop the vehicle and access the ON BOARD READINESS TEST to inspect the DRIVE MODE completion status. Verify that the ON BOARD READINESS TEST status changing to YES. Access the DIAGNOSTIC MONITORING TEST RESULTS. (See ON-BOARD DIAGNOSTIC TEST [L5] .) Verify the #31:83 (EGR pressure variation) value. Is the value out of the specification?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L5] .)
7		No	Repeat this 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.