CAN Main Wire for Disconnection

NETWORKING: CAN COMMUNICATION SYSTEM: CAN Main Wire for Disconnection
- CAN Main Wire for Disconnection

DESCRIPTION

There may be an open circuit in the main wire and/or the DLC3 branch wire when the resistance between terminals 6 (CANH) and 14 (CANL) of the DLC3 is 70 Ohms or higher.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:
* Turn the ignition switch off before measuring the resistances of the CAN main wire and the CAN branch wire.
* After the ignition switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.
* Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the ignition switch, any other switches or the doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

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. CHECK DLC3

(a) Turn the ignition switch off.

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

Standard Resistance:

Text in Illustration

NOTICE:
When the measured value is 133 Ohms or higher and a CAN communication system diagnostic trouble code 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.

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

2. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN J/C NO. 2 SIDE)

(a) Turn the ignition switch off.

(b) Disconnect the A49 CAN No. 1 junction connector.

Text in Illustration

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

3. CONNECT CONNECTOR

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

NEXT -- Continue to next step.

4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM)

(a) Turn the ignition switch off.

(b) Disconnect the A18 ECM connector.

Text in Illustration

NG -- CONNECT CONNECTOR

OK -- REPLACE ECM Removal

5. CONNECT CONNECTOR

(a) Reconnect the ECM connector.

NEXT -- Continue to next step.

6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 1 J/C - ECM)

(a) Turn the ignition switch off.

(b) Disconnect the A49 CAN No. 1 junction connector.

Text in Illustration

NG -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN-H, CAN-L)

OK -- REPLACE CAN NO. 1 JUNCTION CONNECTOR

7. CONNECT CONNECTOR

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

NEXT -- Continue to next step.

8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ECU)

(a) Turn the ignition switch off.

(b) Disconnect the D1 combination meter assembly (combination meter ECU) connector.

Text in Illustration

NG -- CONNECT CONNECTOR

OK -- REPLACE COMBINATION METER ASSEMBLY Removal

9. CONNECT CONNECTOR

(a) Reconnect the combination meter assembly (combination meter ECU) connector.

NEXT -- Continue to next step.

10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 2 J/C - COMBINATION METER ECU)

(a) Turn the ignition switch off.

(b) Disconnect the D71 CAN No. 2 junction connector.

Text in Illustration

NG -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN-H, CAN-L)
OK -- Continue to next step.

11. CHECK FOR OPEN IN CAN BUS MAIN WIRE (CAN NO. 1 J/C - CAN NO. 2 J/C)

(a) Turn the ignition switch off.

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

Standard Resistance::

Text in Illustration

NG -- REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CAN-H, CAN-L)

OK -- REPLACE CAN NO. 2 JUNCTION CONNECTOR