Diagnostic procedure

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DIAGNOSTIC PROCEDURE CHART

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED Has the FREEZE FRAME DATA (Mode 2)/Snapshot data been recorded?	Yes	Go to the next step.
1		No	Record the FREEZE FRAME DATA (Mode 2)/snapshot 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 EGR VALVE CONNECTOR CONDITION Switch the ignition to off. Disconnect the EGR valve connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 10.
3		No	Go to the next step.
4	INSPECT EGR POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT EGR valve connector is disconnected. Switch the ignition to ON (engine off). Measure the voltage between the following terminals and body ground: EGR valve terminal C (wiring harness-side) EGR valve terminal D (wiring harness-side) Is the voltage B+ ?	Yes	Go to the next step.
4		No	Inspect the ENGINE 10 A fuse. If the fuse is melt: Repair or replace the wiring harness for a possible short to ground. Replace the fuse. If the fuse is deterioration: Replace the fuse. If the fuse is normal: Repair or replace the wiring harness for a possible open circuit. Go to Step 10.
5	INSPECT EGR CONTROL CIRCUIT FOR SHORT TO GROUND EGR valve connector is disconnected. Switch the ignition to off. Inspect for continuity between the following terminals and body ground: EGR valve terminal E (wiring harness-side) EGR valve terminal A (wiring harness-side) EGR valve terminal B (wiring harness-side) EGR valve terminal F (wiring harness-side) Is there continuity?	Yes	If the short to ground circuit could be detected: Repair or replace the wiring harness for a possible short to ground. If the short to ground circuit could not be detected: Replace the PCM (short to ground in PCM internal circuit). (See PCM REMOVAL/INSTALLATION .) Go to Step 10.
5		No	Go to the next step.
6	INSPECT PCM CONNECTOR CONDITION Disconnect the PCM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction?	Yes	Repair or replace the terminal and/or connector, then go to Step 10.
6		No	Go to the next step.
7	INSPECT EGR CONTROL CIRCUIT FOR SHORT TO POWER SUPPLY EGR valve and PCM connectors are disconnected. Switch the ignition to ON (engine off). Measure the voltage between the following terminals and body ground: EGR valve terminal E (wiring harness-side) EGR valve terminal A (wiring harness-side) EGR valve terminal B (wiring harness-side) EGR valve terminal F (wiring harness-side) Is there any voltage?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
7		No	Go to the next step.
8	INSPECT EGR VALVE Inspect the EGR valve. (See EGR VALVE INSPECTION .) Is there any malfunction?	Yes	Replace the EGR valve, then go to Step 10. (See EGR VALVE REMOVAL/INSTALLATION .)
8		No	Go to the next step
9	INSPECT EGR CONTROL CIRCUIT FOR OPEN CIRCUIT EGR valve and PCM connectors are disconnected. Switch the ignition to off. Inspect for continuity between the following terminals: EGR valve terminal E (wiring harness-side) and PCM terminal 2AX (wiring harness-side) EGR valve terminal A (wiring harness-side) and PCM terminal 2BA (wiring harness-side) EGR valve terminal B (wiring harness-side) and PCM terminal 2AT (wiring harness-side) EGR valve terminal F (wiring harness-side) and PCM terminal 2AW (wiring harness-side) Is there continuity?	Yes	Go to the next step.
9		No	Repair or replace the wiring harness for a possible open circuit, then go to the next step.
10	VERIFY DTC TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE .) Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST .) Is the PENDING CODE for this DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION .) Go to the next step.
10		No	Go to the next step.
11	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 .)
11		No	DTC troubleshooting completed.