Open In CAN Main Wire

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Open in CAN Main Wire

Open in CAN Main Wire

DESCRIPTION

There may be an open circuit in the CAN main wire and / or the DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 69 Ohms or more.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DLC3




(a) Measure the resistance of the DLC3.
Standard resistance:





NOTE: When the measured value is 132 Ohms or more and the CAN communication system DTC is output, there may be a fault besides disconnection of the DLC3 branch wire. For that reason, troubleshooting should be performed again from "HOW TO PROCEED WITH TROUBLESHOOTING" How to Proceed With Troubleshooting after repairing the trouble area.

B -- REPLACE DLC3 BRANCH WIRE AND CONNECTOR (CANH, CANL)
A -- Continue to next step.

2. CHECK CAN MAIN WIRE FOR DISCONNECTION (CAN BUS CHECK)
(a) Perform "CAN Bus Check" using the Techstream via the CAN VIM Diagnosis System.

Result





C -- CHECK CAN MAIN WIRE FOR DISCONNECTION (J/C1 - ECM)
B -- CHECK CAN MAIN WIRE FOR DISCONNECTION (BATTERY ECU - J/C1)
A -- Continue to next step.

3. CHECK CAN MAIN WIRE FOR DISCONNECTION (ECM - J/C2)




(a) Disconnect the E6 ECM connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (ECM - J/C2)
OK -- REPLACE ECM
4. CHECK CAN MAIN WIRE FOR DISCONNECTION (BATTERY ECU - J/C1)




(a) Disconnect the B11 battery ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1)
OK -- REPLACE BATTERY ECU
5. CHECK CAN MAIN WIRE FOR DISCONNECTION (J/C1 - ECM)




(a) Disconnect the J15 J/C1 connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- CONNECT CONNECTOR
OK -- Continue to next step.

6. CONNECT CONNECTOR
(a) Reconnect the J15 J/C1 connector.
NEXT -- Continue to next step.

7. CHECK CAN MAIN WIRE FOR DISCONNECTION (BATTERY ECU - J/C1)




(a) Disconnect the B11 battery ECU connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (BATTERY ECU - J/C1)
OK -- REPLACE BATTERY ECU
8. CONNECT CONNECTOR
(a) Reconnect the J15 J/C1 connector.
NEXT -- Continue to next step.

9. CHECK CAN MAIN WIRE FOR DISCONNECTION (J/C2 - J/C1)




(a) Disconnect the J18 J/C2 connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE CAN MAIN WIRE AND CONNECTOR (J/C2 - J/C1)
OK -- Continue to next step.

10. CONNECT CONNECTOR
(a) Reconnect the J18 J/C2 connector.
NEXT -- Continue to next step.

11. CHECK CAN MAIN WIRE FOR DISCONNECTION (ECM - J/C2)




(a) Disconnect the E6 ECM connector.
(b) Measure the resistance of the wire harness side connector.
Standard resistance:






NG -- REPLACE CAN MAIN WIRE AND CONNECTOR
OK -- REPLACE ECM