PINPOINT TEST C : The Temperature Gauge Is Inoperative: Notes
Diagnostic Overview
Refer to Instrument Panel Cluster (IPC) , Temperature Gauge.
NOTE:
If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative tachometer, speedometer or odometer.
Normal Operation and Fault Conditions
If the IPC does not receive the engine coolant temperature message from the PCM for more than 5 seconds, the IPC sets DTC 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 for 5 seconds or more, the IPC sets DTC U0401:81 and defaults the temperature gauge to cold (C).