• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
An ignition 1 voltage is supplied to the intake manifold tuning (IMT) valve solenoid. The engine control module (ECM) controls the IMT valve solenoid by grounding the control circuit via an internal driver switch. The primary function of the driver is to supply ground for the IMT valve solenoid. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the voltage on the control circuit.
• | The ignition is ON. |
• | The DTCs run continuously once the above condition is met. |
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match.
DTCs P0661 and P0662 are Type B DTCs
DTCs P0661 and P0662 are Type B DTCs
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If the test lamp does not illuminate, repair the ignition 1 voltage circuit for a short to ground or an open/high resistance. Replace the fuse, if necessary. |
⇒ | If the test lamp is always ON, test for a short to ground on the control circuit. If circuit tests normal, replace the ECM. |
⇒ | If the test lamp is always OFF, test for a short to voltage or an open/high resistance on the control circuit. If circuit tests normal, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, setup, and programming