Test E: The Instrument Cluster Does Not Respond to the Diagnostic Tool

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

E1:

E2-E4:

Normal Operation
The instrument cluster communicates with the diagnostic tool and all the modules on the high speed controller area network (CAN) through circuits 1908 (WH) and 1909 (BK). The instrument cluster also communicates with all the modules on the medium speed CAN, circuits 2180 (WH/BK) and 2181 (BK/YE), while serving as a gateway between the medium speed CAN and the high speed CAN. Both high speed and medium speed CAN are not designed to operate under single point fault conditions. If either circuit is shorted to voltage or the CAN data plus is shorted to ground, module-to-module and module-to-tester communication is not possible. If the CAN data minus is shorted to ground or an open exists on either bus line, module-to-module and module-to-tester communication is marginal at best. The CAN bus may remain operational when one of the two termination resistors are not present. Check circuits 1908 (WH) and 1909 (BK) between the instrument cluster C220 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 one of the high speed CAN circuits, damage to the DLC C251, damage to the instrument cluster C220, or a problem in an in-line connector.

Possible Causes
- high speed CAN circuit 1908 (WH) or 1909 (BK) open
- medium speed CAN circuit 2180 (WH/BK) or 2181 (BK/YE) open
- instrument cluster C220
- instrument cluster