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 or invalid 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. REFER to Engine Cooling .

Does the engine cooling system and thermostat operate correctly?







2. 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?







3. 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 a PCM (Powertrain Control Module) KOEO (Key ON Engine OFF) self-test.

Are any DTCs (Diagnostic Trouble Codes) recorded?







4. CHECK THE TEMPERATURE GAUGE OPERATION USING THE DEALER TEST MODE

1. Ignition ON.

2. Monitor the temperature gauge.

3. Ignition OFF.

4. Enter the Dealer Test Mode. REFER to Dealer Test Mode .

5. Scroll to gauge sweep.

6. Monitor the temperature gauge when the gauge sweep initiates.

Does the temperature gauge start at cold (C), move to full hot (H) and return to cold (C)?







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

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

2. Start the engine.

3. NOTE: The coolant temperature should range between 0°C (32°F)-43°C (109.3°F) with the gauge in the cold (C) range, between 50°C (121.9°F) and 110°C (229.8°F) with the gauge in the normal or mid-range and above 115°C (238.8°F) with the gauge in the hot (H) range.
Monitor the PCM (Powertrain Control Module) temperature PID (Parameter Identification) (ECT).

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