Test I: The Instrument Cluster Does Not Respond to the Diagnostic Tool (SCP)

PINPOINT TEST I: THE INSTRUMENT CLUSTER DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

I1-I2:

I3-I4:

Normal Operation
The instrument cluster communicates with the diagnostic tool through the controller area network (CAN) circuits, 1827 (WH/LG) and 1828 (PK/LG). The instrument cluster also uses the standard corporate protocol (SCP) communication network, circuits 914 (TN/OG) and 915 (PK/LB) to communicates with SCP network modules. Check both the CAN, and the SCP communication network circuits between the instrument cluster C2220 and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open in the CAN or SCP circuits, damage to the DLC C251, damage to the instrument cluster C2220, or a problem in the in-line connectors.

Possible Causes
- CAN data plus circuit 1827 (WH/LG) open
- CAN data minus circuit 1828 (PK/LG) open
- SCP data plus circuit 914 (TN/OG) open
- SCP data minus circuit 915 (PK/LB) open
- instrument cluster C2220
- instrument cluster