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DTC 1020: Can Bus Communication General Malfunction: Notes

Fig 1: Controller Antilock Brake CAN C BUS Circuit Schematic
GC0033806Courtesy of CHRYSLER LLC
  1. When Monitored: With the ignition on.
  2. Set Condition: CAN Bus communication failure between the Controller Antilock Brake (CAB) and the CAN Bus network.
Possible Causes 
CAN C BUS (+) CIRCUIT OPEN
CAN C BUS (-) CIRCUIT OPEN
CONTROLLER ANTILOCK BRAKE (CAB)

For a complete Antilock Brake System (ABS) circuit diagram, see SCHEMATICS AND DIAGRAMS .