DTC Troubleshooting
DTC TROUBLESHOOTING CHART
| Step |
Action |
Yes |
No |
| 1 |
Was "Engine and Emission Control System Check" performed? |
Go to Step 2. |
Go to "ENGINE AND EMISSION CONTROL SYSTEM CHECK
". |
| 2 |
EGR valve check
- With ignition switch turned OFF, disconnect connector from EGR valve.
- Check for proper connection to EGR valve at each terminal.
- If OK, check EGR valve for resistance referring to "EGR VALVE ASSEMBLY INSPECTION
".
Is check result as specified?
|
Go to Step 3. |
EGR valve malfunction. |
| 3 |
Wire harness check
- Connect connector to EGR valve.
- Remove ECM cover and disconnect connector from ECM.
- Check for proper connection to ECM at system related terminals.
- If OK, measure resistance between the following terminals of ECM connector disconnected.
EGR valve resistance
"C51-2-13" and "C51-3-4", "C51-2-14" and "C51-3-4", "C51-2-15" and "C51-3-4", "C51-2-12" and "C51-3-4": 20-24 Ω at 20 °C (68 °F) "C51-2-13" and ground, "C51-2-14" and ground, "C51-2-15" and ground, "C51-2-12" and ground: Infinity
Is check result as specified?
|
Intermittent trouble or faulty ECM. Recheck referring to "INTERMITTENT AND POOR CONNECTION INSPECTION
". |
"BLU/BLK", "LT GRN", "LT GRN/WHT", "LT GRN/YEL" or "LT GRN/ RED" circuit wire is open or shorted to ground. |