Open in One Side of CAN Branch Line

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Open in One Side of CAN Branch Line
- Open in One Side of CAN Branch Line

DESCRIPTION

If 2 or more ECUs and/or sensors do not appear on Techstream "CAN Bus Check" screen, one side of the CAN branch wire may be open. (One side of the CAN-H [branch wire] / CAN-L [branch wire] of the ECU and/or sensor is open.)





WIRING DIAGRAM









INSPECTION PROCEDURE

HINT
Perform the following inspection for the ECUs (sensors) which are not displayed on Techstream. If the malfunction cannot be identified, then perform the following inspections for the ECUs (sensors) connected to CAN communication.

PROCEDURE

1. CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE

(a) Confirm the systems (ECUs and sensors), which use CAN communication, equipped on the vehicle. Diagnosis System

(b) Using Techstream, select "CAN Bus Check" from the "System Select". [*1]

(c) Disconnect the connectors from the ECUs or sensors that are not displayed on the screen. [*2]

(d) Check that only the ECUs and sensors from which the connectors were disconnected in the previous step are not displayed on the "CAN Bus Check" screen. [*3]

HINT
If any ECUs or sensors, other than those from which the connectors were disconnected in the previous step, are not displayed on the "CAN Bus Check" screen, reconnect the disconnected connectors and repeat the procedures [*1], [*2], and [*3].

(e) Perform the communication stop mode check for the ECUs and sensors which correspond to the disconnected connectors. Symptom Related Diagnostic Procedures

NEXT -- GO TO CORRESPONDING COMMUNICATION STOP MODE