Advanced Diagnostics

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.




Monitor Execution, Sequence, Duration, DTC Type, OBD Status




Enable Conditions

Malfunction Threshold
One of these communication abnormality judgment limits is exceeded.
- Abnormality judgment number when 1 byte is received: 2500 times or more.
- Abnormality judgment number when 1 frame is received: 500 times or more.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the ECM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.