Diagnostic Routine D

Diagnostic Routine D

Diagnostic Overview

Incorrect Temperature Gauge Indication

Normal Operation and Fault Conditions

REFER to Temperature Gauge .

If the engine coolant temperature message is missing for 5 seconds or less or if the IPC (Instrument Panel Cluster) receives invalid engine temperature data for 5 seconds or less, the IPC (Instrument Panel Cluster) defaults the temperature gauge to the last setting, based upon the last known good temperature status message.

Pinpoint Test

1. CHECK FOR CORRECT OPERATION OF THE COOLING SYSTEM

1. Verify the engine cooling system and thermostat are functioning correctly.

Does the engine cooling system and thermostat operate correctly?








2. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) SELF-TEST

1. Using a scan tool, perform the PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform the IPC (Instrument Panel Cluster) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?








4. CARRY OUT THE TEMPERATURE GAUGE ACTIVE COMMAND USING THE SCAN TOOL

1. Ignition ON.

2. Using a scan tool, view the IPC (Instrument Panel Cluster) PIDs (Parameter Identifications).

3. NOTE: Set the scan tool to 0 or full cold before beginning this step.
Select the IPC (Instrument Panel Cluster) temperature gauge (ENGCOOLNT) PID (Parameter Identification).

4. Command the temperature gauge according to the tables:
Base IPC (Instrument Panel Cluster)





Optional IPC (Instrument Panel Cluster)





Does the temperature gauge operate according to the above specifications?








5. CHECK THE PCM (Powertrain Control Module) TEMPERATURE PID (Parameter Identification)

NOTE: The coolant temperature should range between 0 C (32 F) and 59 C (138.1 F) with the gauge in the cold (C) range, between -60 C (-75.9 F) and 120 C (247.8 F) with the gauge in the normal or mid-range and above 121 C (249.6 F) with the gauge in the hot (H) range.

1. Using a scan tool, view the PCM (Powertrain Control Module) PIDs (Parameter Identifications).

2. Ignition ON.

3. Select the PCM (Powertrain Control Module) temperature PID (Parameter Identification) (CHT (Cylinder Head Temperature)). With the engine running, monitor the PCM (Powertrain Control Module) temperature PID (Parameter Identification).

Does the PCM (Powertrain Control Module) PID (Parameter Identification) agree with the position of the temperature gauge indication?