Test G: Incorrect Speedometer Indication

PINPOINT TEST G: INCORRECT SPEEDOMETER INDICATION

Normal Operation
The instrument cluster 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 signal from the output shaft speed (OSS) sensor. The PCM monitors the VSS input and sends it to the instrument cluster over the communication network. With the VSS input, the instrument cluster provides the speedometer with a corresponding pointer movement.

This pinpoint test is intended to diagnose the following:
- Tire size and axle ratio configuration
- PCM
- Instrument cluster (IC)

G1-G2:

G3-G4: