Diagnostic Procedure

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION NOTE: Recording can be facilitated using the screen capture function of the PC. Record the FREEZE FRAME DATA/snapshot data on the repair order.	-	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 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 connector and/or terminals, then go to Step 11.
3		No	Go to the next step.
4	INSPECT EGR VALVE POWER SUPPLY CIRCUIT FOR SHORT TO GROUND OR OPEN CIRCUIT Verify that the EGR valve connector is disconnected. Switch the ignition ON (engine off). NOTE: Another DTC may be stored by the PCM detecting an open circuit. Measure the voltage at the following terminals (wiring harness-side): EGR valve terminal C EGR valve terminal D Is the voltage B+?	Yes	Go to the next step.
4		No	Inspect the ENGINE1 15 A fuse. If the fuse is blown: Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: ENGINE1 15 A fuse-EGR valve terminal C ENGINE1 15 A fuse-EGR valve terminal D If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. Replace the fuse. If the fuse is damaged: Replace the fuse. If the fuse is normal: Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: Main relay terminal C-EGR valve terminal C Main relay terminal C-EGR valve terminal D If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 11.
5	INSPECT EGR VALVE CIRCUIT FOR SHORT TO GROUND Verify that the EGR valve connector is disconnected. Switch the ignition off. Inspect for continuity between the following terminals (wiring harness-side) and body ground: EGR valve terminal A EGR valve terminal E EGR valve terminal B EGR valve terminal F Is there continuity?	Yes	Disconnect the PCM connector and inspect the wiring harness for short to ground. If the short to ground circuit could be detected in the wiring harness: Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: EGR valve terminal A-PCM terminal 1J EGR valve terminal E-PCM terminal 1Y EGR valve terminal B-PCM terminal 1O EGR valve terminal F-PCM terminal 1T If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to ground. If the short to ground circuit could not be detected in the wiring harness: Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .) Go to Step 11.
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 connector and/or terminals, then go to Step 11.
6		No	Go to the next step.
7	INSPECT EGR VALVE CIRCUIT FOR SHORT TO POWER SUPPLY Verify that the EGR valve and PCM connectors are disconnected. Switch the ignition ON (engine off). NOTE: Another DTC may be stored by the PCM detecting an open circuit. Measure the voltage at the following terminals (wiring harness-side): EGR valve terminal A EGR valve terminal E EGR valve terminal B EGR valve terminal F Is the voltage 0 V?	Yes	Go to the next step.
7		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: EGR valve terminal A-PCM terminal 1J EGR valve terminal E-PCM terminal 1Y EGR valve terminal B-PCM terminal 1O EGR valve terminal F-PCM terminal 1T If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to power supply. Go to Step 11.
8	INSPECT EGR VALVE CIRCUITS FOR SHORT TO EACH OTHER Verify that the EGR valve and PCM connectors are disconnected. Switch the ignition off. Inspect for continuity EGR valve terminals A, E, B and F (wiring harness-side). Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: EGR valve terminal A-PCM terminal 1J EGR valve terminal E-PCM terminal 1Y EGR valve terminal B-PCM terminal 1O EGR valve terminal F-PCM terminal 1T If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to each other. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has a short to each other. Go to Step 11.
8		No	Go to the next step.
9	INSPECT EGR VALVE CIRCUIT FOR OPEN CIRCUIT Verify that the EGR valve and PCM connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): EGR valve terminal A-PCM terminal 1J EGR valve terminal E-PCM terminal 1Y EGR valve terminal B-PCM terminal 1O EGR valve terminal F- PCM terminal 1T Is there continuity?	Yes	Go to the next step.
9		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: EGR valve terminal A-PCM terminal 1J EGR valve terminal E-PCM terminal 1Y EGR valve terminal B-PCM terminal 1O EGR valve terminal F-PCM terminal 1T If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Repair or replace the malfunctioning part. If there is no common connector: Repair or replace the wiring harness which has an open circuit. Go to Step 11.
10	INSPECT EGR VALVE Inspect the EGR valve. (See EGR VALVE INSPECTION [SKYACTIV-G 2.5T] .) Is there any malfunction?	Yes	Replace the EGR valve, then go to the next step. (See EGR VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .)
10		No	Go to the next step.
11	VERIFY DTC TROUBLESHOOTING COMPLETED Always reconnect all disconnected connectors. Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC [PCM (SKYACTIV-G 2.5T)] .) Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.5T)] .) Is the same DTC present?	Yes	Repeat the inspection from Step 1. If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T] .) Go to the next step.
11		No	Go to the next step.
12	VERIFY AFTER REPAIR PROCEDURE Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.5T)] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G 2.5T)] .)
12		No	DTC troubleshooting completed.