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DTC Troubleshooting

DIAGNOSIS PROCEDURE - DTC P0403 EXHAUST GAS RECIRCULATION (EGR) CIRCUIT MALFUNCTION

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD) System Check.
Is the system check complete?		 - Go to Step 2. Go to "ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK ".
2
  1. Turn the ignition switch to LOCK.
  2. Disconnect the EGR solenoid connector.
  3. Check for an open or a short in the wire between the EGR connector terminal 5 and the main relay terminal 87.
  4. Check for an open or a short in the wire between the EGR connector terminal 1 and the ECM connector terminal 60.

Is the problem found?		 - Go to Step 3. Go to Step 4.
3
  1. Repair the wire or the connector terminal as needed.
  2. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  3. Perform an On-Board Diagnostic (OBD) System Check.

Is the repair complete?		 - System OK -
4
  1. Connect the EGR solenoid connector.
  2. Turn the ignition switch to ON.
  3. Using the Digital Voltmeter (DVM), measure the voltage between the EGR connector terminal 1 and the battery positive.

Is the voltage reading between the specified values?		 12~13V Go to Step 6. Go to Step 5.
5
  1. Replace the EGR valve.
  2. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  3. Perform an On-Board Diagnostic (OBD) System Check.

Is the repair complete?		 - System OK -
6
  1. Replace the ECM.
  2. Perform an On-Board Diagnostic (OBD) System Check.

Is the repair complete?		 - System OK -
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