• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Engine Coolant Temperature Lamp Voltage Supply | P0655 04 | P0655 04 | -- | -- |
Engine Coolant Temperature Lamp Control | P0655 02 | P0655 04 | P0655 01 | -- |
The engine coolant temperature indicator, is located on the instrument panel cluster (IPC). Ignition 1 voltage is supplied directly to the engine coolant temperature indicator. The engine control module (ECM) turns the engine coolant temperature indicator ON by grounding the control circuit.
• | The engine is operating. |
• | The ignition 1 voltage is between 7.5-16 volts. |
• | The DTCs run continuously once the above conditions are met. |
The ECM detects the engine coolant temperature indicator control circuit is open or shorted to ground or voltage.
DTC P0655 is a Type C DTC.
DTC P0655 is a Type C DTC.
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information
⇒ | If the engine coolant temperature indicator illuminates, test the control circuit for a short to ground. If the circuit test normal, replace the P16 IPC. |
⇒ | If the engine coolant temperature indicator does not illuminate, test the control circuit for a short to voltage or an open/high resistance. If the circuit test normal, replace the P16 IPC. |
⇒ | If the engine coolant temperature indicator illuminates, inspect for a poor connection or replace the K20 ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for ECM replacement, setup, and programming |