CAN Bus Circuit

Symptom
CAN BUS CIRCUIT

When Monitored: Always monitored with system active at each ignition cycle.

Set Condition: Open circuit in the CAN C Bus circuit or CAN C Bus (-) circuit, Short to ground of CAN C Bus (+) circuit or CAN C Bus (-) circuit, Short to Voltage of CAN C Bus (+) circuit or CAN C Bus (-) circuit, CAN C Bus (+) circuit shorted to CAN C Bus (-) circuit, or a TCM failure. Note: All CAN message missing DTCs will also be present, which indicates a Bus Failure.

Test 1-3:

Test 4-6:

Test 7-9:

Test 10-12:

POSSIBLE CAUSES
- CAN BUS CIRCUITS OPEN TO SKREEM OR ECM
- CAN BUS CIRCUITS OPEN TO TCM
- CAN CIRCUITS SHORTED TO GROUND
- CAN CIRCUIT SHORT TO VOLTAGE
- CAN CIRCUITS SHORTED TOGETHER
- MODULE SHORT INTERNALLY
- MODULE SHORT TO GROUND
- MODULE SHORT TO VOLTAGE
- ECM - TERMINATING RESISTOR
- SENTRY KEY REMOTE ENTRY MODULE
- TRANSMISSION CONTROL MODULE