Diagnostic Routine C

Diagnostic Routine C

Diagnostic Overview

The Temperature Gauge Is Inoperative

Normal Operation and Fault Conditions

NOTE: If DTC (Diagnostic Trouble Code) U0100:00 sets in the IPC (Instrument Panel Cluster), other observable symptoms can be an inoperative tachometer, speedometer or odometer.

REFER to Temperature Gauge .

If the IPC (Instrument Panel Cluster) does not receive the engine coolant temperature message from the PCM (Powertrain Control Module) for more than 5 seconds, the IPC (Instrument Panel Cluster) sets DTC (Diagnostic Trouble Code) U0100:00 in continuous memory and defaults the temperature gauge to cold (C). If the engine coolant temperature message is deemed invalid by the IPC (Instrument Panel Cluster) for 5 seconds or more, the IPC (Instrument Panel Cluster) sets DTC (Diagnostic Trouble Code) U0401:81 and defaults the temperature gauge to cold (C).

Pinpoint Test

1. 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?








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. 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).

NOTE: Make sure to set the scan tool to 0 or full cold before beginning this step.

3. Select the IPC (Instrument Panel Cluster) temperature gauge (ENGCOOLNT) PID (Parameter Identification). Command the temperature gauge on and off while monitoring the gauge.

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