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U0024-CAN B BUS (-) CIRCUIT OPEN (CONTINUED) 2. ATTEMPT TO ISOLATE THE OPEN CONDITION Turn the ignition on. Verify that all CAN B Bus modules are communicating with the scan NOTE: A red X will be next to the module that is not communi- NOTE: If any module is not communicating, perform the appropri- Gain access to the Front Control Module C1 harness connector, but Using a fused jumper wire, connect one end to ground and with the Turn the ignition on. With the scan tool monitor the network status screen and document all modules that display a red X. Are there any red X’s displayed next to the modules? Yes >> Go To 3 No >> Check backprobe connection to ground, make sure it is proper. The CAN B Bus open DTC may no longer be active, it may be stored. Check all module connections Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1). 3. ATTEMPT TO ISOLATE THE OPEN CONDITION — MULTIPLE RED X’S With the scan tool continue monitoring the network status screen. Are there multiple red X’s displayed next to the modules? Yes >> The most likely cause of this condition is an open CAN B Bus (-) circuit between a common CAN B Bus splice and the modules that display the red X next to them. Use the wiring diagrams will help you deter- Perform BODY VERIFICATION TEST - VER 1. (Refer to BODY VERIFICATION TEST - VER 1). No >> Go To 4 HB ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS 8E - 29 |