DTC P0600: Serial Communication Link Malfunction: General Description

The multiplex communication is executed among the engine control module (ECM), the gauge assembly unit, and the multiplex control unit.

Each unit transmits a signal to the other units and controls the other unit's use of the necessary information.

When the communication from another unit can not be received for a set time or more, or when an abnormality of the received data occurred a certain number of times, each unit detects a communication abnormality and a DTC is stored.