For 1990-2009 cars only
Diagnostic Instructions
| • | 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/System Description
The instrument panel cluster (IPC) illuminates the TEMP indicator when the engine control module (ECM) determines that the coolant temperature is more than 128°C (262°F). The IPC receives a discrete input from the ECM requesting illumination.
The IPC illuminates the TEMP indicator during the display test at the start of each ignition cycle.
Circuit/System Testing
With the engine running within the normal operating temperature range, the engine coolant temperature (ECT) indicator should not be illuminated.
| ⇒ | If the engine coolant is not within the normal operating range, repair the overheating condition. |
| ⇒ | If the engine coolant is within the normal operating range, replace the IPC. |
Repair Instructions
Repair Verification
Verify that the ECT indicator is OFF while the engine is operating.
