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U0019–CAN B BUS (CONTINUED) For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes CAN B BUS DTCs IN FRONT CONTROL MODULE (D54) CAN B BUS (–) CIRCUIT OPEN (D55) CAN B BUS (+) CIRCUIT OPEN ELECTRONIC OVERHEAD MODULE Diagnostic Test 1. TEST FOR INTERMITTENT CONDITION Turn the ignition on. With the scan tool, record and erase DTCs Cycle the ignition from on to off 3 times. Turn the ignition on. With the scan tool, read DTCs. Does the scan tool display U0019–CAN B BUS CIRCUIT? Yes >> Go To 2 No >> The conditions that caused this code to set are not present at this time. Using the wiring diagram/sche- matic as a guide, inspect the wiring and connectors. Perform the BODY VERIFICATION TEST-VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL 2. CHECK FRONT CONTROL MODULE DTCs With the scan tool, read Front Control Module DTCs. Does the scan tool display any CAN B BUS DTCs – ACTIVE? Yes >> Refer to the symptom list for problems related to Communication in the ELECTRICAL.– ELECTRONIC CONTROL MODULES – ELECTRICAL DIAGNOSES section. No >> Go to 3 8M - 10 OVERHEAD CONSOLE - ELECTRICAL DIAGNOSTICS ND |