The twist pair wires used for CAN communication are terminated at the two 120 Ω resistors, one each installed inside the ECM and inside the central gateway control unit. The following control units and devices communicate the control information and diagnosis information via the CAN communication circuit.
- ECM
- Battery sensor
- TCCM
- Rear differential lock control unit
- TCM
- Information module
- Central gateway control unit
The following conditions cause poor CAN communication.
- Open circuit in the CAN communication circuit
- Short together between the CAN Low circuit and the CAN High circuit
- Short to ground or short to the power supply in the CAN communication circuit
- Failure inside the module, which causes a short to ground or a short to the power supply circuit in the CAN communication circuit