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 higher.





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE

1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

NEXT -- Continue to next step.

2. CHECK DLC3

(a) Disconnect the J118 No. 1 junction connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CANH, CANL)
OK -- Continue to next step.

3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - ECM)

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





Standard resistance:





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

4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - COMBINATION METER ECU)

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





Standard resistance:





NG -- CONNECT CONNECTOR

OK -- REPLACE NO. 1 JUNCTION CONNECTOR

5. CONNECT CONNECTOR

(a) Reconnect the J118 No. 1 junction connector.

NEXT -- Continue to next step.

6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 JUNCTION CONNECTOR - ECM)

(a) Disconnect the J113 No. 2 junction connector.





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

Standard resistance:





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

7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

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





Standard resistance:





NG -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)

OK -- REPLACE NO. 2 JUNCTION CONNECTOR

8. CONNECT CONNECTOR

(a) Reconnect the J113 No. 2 junction connector.

NEXT -- Continue to next step.

9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 2 JUNCTION CONNECTOR)

(a) Disconnect the A24 ECM connector.





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

Standard resistance:





Result





E -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 2 JUNCTION CONNECTOR)

D -- REPLACE ECM Removal

C -- REPLACE ECM Removal

B -- REPLACE ECM Removal

A -- REPLACE ECM Removal

10. CONNECT CONNECTOR

(a) Reconnect the J118 No. 1 junction connector.

NEXT -- Continue to next step.

11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR)

(a) Disconnect the J28 combination meter ECU connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO COMBINATION METER ECU (COMBINATION METER ECU - NO. 1 JUNCTION CONNECTOR)

OK -- REPLACE COMBINATION METER ASSEMBLY Removal