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DTC Troubleshooting

DTC TROUBLESHOOTING PROCEDURES

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 IMT valve control circuit check 
  1. Disconnect connectors from IMT valve and ECM with ignition switch turned OFF.
  2. Check for proper terminal connection to IMT valve and ECM connectors.
  3. If connection are OK, check that IMT valve circuit is as follows.
    • Wiring harness resistance of IMT valve control circuit is less than 3 Ω.
    • Insulation resistance of IMT valve control circuit is infinity between IMT valve connector and vehicle body ground.
    • Insulation resistance of wire harness is infinity between IMT valve control terminal and each other terminal at IMT valve connector.
    • Circuit voltage of IMT vacuum solenoid valve control circuit is 0 - 1 V with ignition switch turned ON.

    Are they in good condition? 

 Go to Step 3. Repair or replace IMT valve control circuit.
3 IMT vacuum solenoid valve check 
  1. Check IMT valve referring to IMT VALVE ACTUATOR INSPECTION .

    Is it in good condition? 

 Substitute a known-good ECM and recheck. Replace IMT valve.
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