F–136
ON-BOARD DIAGNOSTIC
End Of Sie
3 INSPECT POWER CIRCUIT FOR OPEN
CIRCUIT
• Turn ignition key to ON (Engine OFF).
• Measure voltage following terminal and body
ground.
— EGR valve terminal C
— EGR valve terminal D
• Is voltage B+?
Yes Go to next step.
No Repair or replace harness for open circuit then go to Step
9.
4 INSPECT EGR VALVE
• Perform EGR valve inspection.
(See F–40 EGR VALVE INSPECTION.)
• Is EGR valve okay?
Yes Go to next step.
No Replace EGR valve, then go to Step 9.
5 INSPECT FOR CONTROL CIRCUIT FOR SHORT
TO GROUND
• Turn ignition key to OFF.
• Inspect continuity following terminal and body
ground:
— EGR valve terminal E
— EGR valve terminal A
— EGR valve terminal B
— EGR valve terminal F
• is there continuity?
Yes Repair or replace harness for short to ground, then go to
Step 9.
No Go to next step.
6 INSPECT FOR CONTROL CIRCUIT FOR SHORT
TO POWER
• Turn ignition switch key to ON (Engine OFF).
• Measure voltage following terminal and body
ground:
— EGR valve terminal E
— EGR valve terminal A
— EGR valve terminal B
— EGR valve terminal F
• Is voltage B+?
Yes Repair or replace harness for short to power, then go to
Step 9.
No Go to next step.
7 INSPECT POOR CONNECTION OF PCM
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-
out terminals, corrosion, etc.).
• Is there any malfunctions?
Yes Repair or replace terminals and/or connector, then go to
Step 9.
No Go to next step.
8 INSPECT CONTROL CIRCUIT FOR OPEN
CIRCUIT
• Remove PCM with PCM connector connected.
• Inspect continuity following terminals:
— Between EGR valve terminal E and PCM
terminal 4E
— Between EGR valve terminal A and PCM
terminal 4H
— BetweenEGR valve terminal B and PCM
terminal 4K
— Between EGR valve terminal F and PCM
terminal 4N
• Is there continuity?
Yes Go to next step.
No Repair or replace harness for open circuit then go to next
step.
9 VERIFY TROUBLESHOOTING OF DTC P0403
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
(See F–66 KOEO/KOER SELF-TEST.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See F–43 PCM REMOVAL/INSTALLATION.)
No Go to next step.
10 VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
(See F–66 AFTER REPAIR PROCEDURE.)
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See F–67 DTC TABLE.)
No Troubleshooting completed.
STEP INSPECTION ACTION
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