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Open In CAN Main Wire








NETWORKING: 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.





HINT: *1: w/ Air suspension system

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT: Operating the ignition switch, any other 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 disable the SRS system.

NEXT -- Continue to next step.

2. CHECK DLC3





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





NOTE: When the measured value is 132 Ohms or higher and a CAN communication system DTC is output, there may be a problem 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.

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) Disconnect the H101 No. 1 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.

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





(a) Disconnect the H91 No. 1 junction connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result





C -- CONNECT CONNECTOR
B -- CONNECT CONNECTOR
A -- REPLACE NO. 1 JUNCTION CONNECTOR
5. CONNECT CONNECTOR
(a) Reconnect the H101 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 H99 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) Disconnect the H100 No. 2 junction connector.
(b) 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 H99 No. 1 junction connector.
NEXT -- Continue to next step.

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





(a) Disconnect the A27 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Result





D -- REPLACE ECM
C -- REPLACE ECM
B -- REPLACE ECM
A -- REPAIR OR REPLACE CAN MAIN WIRE CONNECTED TO ECM (ECM - NO. 2 JUNCTION CONNECTOR)
10. CONNECT CONNECTOR
(a) Reconnect the H91 No. 1 junction connector.
NEXT -- Continue to next step.

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





(a) Disconnect the H37 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
12. CONNECT CONNECTOR
(a) Reconnect the H91 No. 1 junction connector.
NEXT -- Continue to next step.

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





(a) Disconnect the O41 No. 4 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.

14. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 JUNCTION CONNECTOR - NO. 4 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. 4 JUNCTION CONNECTOR)
OK -- REPLACE NO. 4 JUNCTION CONNECTOR
15. CONNECT CONNECTOR
(a) Reconnect the O41 No. 4 junction connector.
NEXT -- Continue to next step.

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





(a) Disconnect the H37 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. 4 JUNCTION CONNECTOR)
OK -- REPLACE COMBINATION METER ASSEMBLY
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