LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2008 >> Optra LS, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.6L >> Diagnostic Information and Procedures >> DTC P1181 or P1182 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the IMT valve solenoid.
  2. Ignition ON, test for battery voltage between the ignition 1 voltage circuit terminal 2 and ground.
    • If less than B+, repair the ignition 1 voltage circuit solenoid for a short to ground or an open/high resistance. Replace the fuse, if necessary.
  3. Ignition OFF, connect a test lamp between the control circuit terminal 1 and the ignition 1 voltage circuit terminal 2.
  4. Ignition ON, command the IMT valve solenoid ON and OFF with a scan tool. The test lamp should turn ON and OFF with the command.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  5. If all circuits test normal, test or replace the IMT valve solenoid.
scientia non olet · About LEMON Manuals