Normal Operation

Several modules receive network messages from the Instrument Panel Cluster (IPC) via the Medium Speed Controller Area Network (MS-CAN). The following information is included in the messages:

• Transmission gear selected
• Vehicle speed
• Parking aid disable switch status

All modules receiving a particular message should exhibit a symptom if the message is missing.

• DTC U0155 (Lost Communication With Instrument Panel Cluster (IPC) Control Panel) - set by the Parking Aid Module (PAM) when network messages are missing from the IC for greater than 5 seconds with the ignition in RUN.

This pinpoint test is intended to diagnose the following: 

• Module communication
• PAM
• IPC