When Monitored And Set Conditions
NOTE:
This procedure diagnoses the CAN Bus circuits between the Data Link Connector (DLC) and the Security Gateway (SGW) Module.
NOTE:
If the vehicle does not operate properly and the scan tool does not communicate on a CAN Bus, perform the appropriate Body Control Module (BCM) CAN BUS OFF, CAN BUS MISSING MESSAGE or CAN BUS NO SIGNAL U-code diagnostic procedure for the CAN Bus being diagnosed. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX .
This condition will not display any Diagnostic Trouble Codes (DTCs).
Default Actions:
- The vehicle will operate normally.
| Possible Causes |
|---|
| INOPERATIVE SCAN TOOL |
| POOR TERMINAL CONTACT OR CONNECTOR CONNECTION(S) |
| DATA LINK CONNECTOR (DLC) |
| DATA LINK CONNECTOR FUSED B (+) CIRCUIT OPEN OR HIGH RESISTANCE |
| DATA LINK CONNECTOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| CAN C (+) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C (-) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN B (+) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN B (-) BUS CIRCUIT OPEN, SHORTED OR HIGH RESISTANCE |
| CAN C (+) AND (-) BUS CIRCUITS SHORTED TOGETHER |
| CAN B (+) AND (-) BUS CIRCUITS SHORTED TOGETHER |
| SECURITY GATEWAY (SGW) MODULE |