The TCCM communicates with the scan tool via the CAN communication circuit. The TCCM also communicates with other control units via the CAN communication circuit.
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