4AT RE4F03C

P0863 TCM COMMUNICATION

Description

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability.
Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.


DTC Logic


DTC DETECTION LOGIC







DTC CONFIRMATION PROCEDURE


1. PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn the ignition switch OFF and wait for at least 10 seconds, then perform the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Start engine and wait for at least 10 seconds.
2.Check DTC.
Is "P0863" detected?
YES- Go to "Diagnosis Procedure" .
NO- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.


Diagnosis Procedure


1. CHECK CAN COMMUNICATION CIRCUIT

With CONSULT
1.Start the engine.
2.Check DTC.
Is "P0863" indicated?
YES- Replace the TCM. Refer to "Removal and Installation" Removal And Installation.
NO- Check intermittent incident. Refer to "Intermittent Incident" Intermittent Incident.