DTC Troubleshooting
DTC TROUBLESHOOTING CHART
| Step |
Action |
Value (s) |
Yes |
No |
| 1 |
Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
.
Is the system check complete? |
- |
Go to Step 2. |
Go to ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
. |
| 2 |
- Turn the ignition switch to LOCK.
- Disconnect the EGR solenoid connector.
- Check for an open or a short in the wire between the EGR connector terminal 5 and the main relay terminal 87.
- Check for an open or a short in the wire between the EGR connector terminal 1 and the ECM connector terminal A46.
Is the problem found? |
- |
Go to Step 3. |
Go to Step 4. |
| 3 |
- Repair the wire or the connector terminal as needed.
- Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
- Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
.
Is the repair complete? |
- |
System OK |
- |
| 4 |
- Connect the EGR solenoid connector.
- Turn the ignition switch to ON.
- 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 - 13 V |
Go to Step 6. |
Go to Step 5. |
| 5 |
- Replace the EGR valve.
- Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
- Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
.
Is the repair complete? |
- |
System OK |
- |
| 6 |
- Replace the ECM.
- Perform an ON-BOARD DIAGNOSTIC (OBD II) SYSTEM CHECK
.
Is the repair complete? |
- |
System OK |
- |