Check For an Open In One Side of CAN Sub Bus Line

CHECK FOR AN OPEN IN ONE SIDE OF CAN SUB BUS LINE

CIRCUIT DESCRIPTION




If 2 or more ECUs and/or sensors do not appear on the hand-held tester's "BUS CHECK" screen via the CAN VIM, one side of the CAN sub-bus line may be open. (One side of the CAN-H [sub-bus line]/CAN-L [sub-bus line] of the ECU and/or sensor is open.)

Wiring Diagram:

Step 1 - 2:

INSPECTION PROCEDURE

HINT:
- The given is the troubleshooting procedure of an open in either CANH or CANL of the ECU A.
- Perform the following inspection for the ECUs (sensors) which are not displayed on the hand-held tester. If a malfunction cannot be identified, then perform the given inspections for the ECUs (sensors) connected to CAN communication.