CAN Main Bus Line for Disconnection

CAN COMMUNICATION SYSTEM: CAN Main Bus Line for Disconnection

CAN Main Bus Line for Disconnection

DESCRIPTION

The CAN main bus line and DLC3 sub bus line may have a disconnection when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is more than 69 Ohms.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DLC3





(a) Measure the resistance according to the value(s) in the table below.
Result:





NOTE: When the measured value is 132 Ohmsor more and a CAN communication system diagnostic code is output, there may be a fault other than a disconnection of the DLC3 sub bus line.

For that reason, troubleshooting should be performed again from "How to Proceed with Troubleshooting" after repairing the trouble area.
B -- REPAIR OR REPLACE DLC3 BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)
A -- Continue to next step.
2. CHECK CAN MAIN BUS LINE FOR DISCONNECTION (ECM - CAN J/C)





(a) Disconnect the connector (E7) from the ECM.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





OK -- REPLACE ECM
NG -- Continue to next step.
3. INSPECT CAN J/C





(a) Disconnect the CAN main bus line connector (J10) from the CAN J/C.

- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.





(b) Measure the resistance according to the value in the table below.
Standard resistance:





NG -- REPLACE CAN J/C
OK -- REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN J/C - ECM)