Pinpoint Test G: Incorrect Speedometer Indication
Instrumentation, Message Center and Warning Chimes
Pinpoint Test G: Incorrect Speedometer Indication
Normal Operation
The Instrument Cluster (IC) receives the Vehicle Speed Sensor (VSS) signal from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. The PCM receives the VSS input from the Output Shaft Speed (OSS) sensor. The IC monitors the VSS input from the PCM and commands the speedometer with a corresponding movement of the pointer.
If the vehicle speed data is missing or invalid for 5 seconds or less or if IC receives invalid vehicle speed data for 5 seconds or less, the IC defaults the speedometer to the last setting, based upon the last known good vehicle speed message received.
NOTE: If DTC U0100 is set in the IC, other observable symptoms may be an inoperative tachometer, temperature gauge or odometer.
If the IC does not receive the vehicle speed data message from the PCM for more than 5 seconds, the IC sets DTC U0100 in continuous memory and defaults the speedometer to 0 km/h (0 mph).
If the vehicle speed data is deemed invalid by the IC for more than 5 seconds, the IC sets DTC U2197 and defaults the speedometer to 0 km/h (0 mph).
This pinpoint test is intended to diagnose the following:
- Tire size configuration
- Axle ratio configuration
- PCM
- IC
PINPOINT TEST G: INCORRECT SPEEDOMETER INDICATION
