Open in CAN Main Bus Line
CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: Open in CAN Main Bus Line
- Open in CAN Main Bus Line
DESCRIPTION
There may be an open circuit in the CAN main wire and/or 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 between CAN bus main wires and between CAN bus branch wires.
* Turn the ignition switch off before inspecting CAN bus wires for a ground short.
* After the ignition switch is turned off, check that the key reminder warning system is 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 any doors need to be opened in order to check connectors, open the doors and leave them open.
HINT
* Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.
* Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.
PROCEDURE
1. PRECAUTION
NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the battery terminal. Therefore, make sure to read the disconnecting the cable from the battery terminal notice before proceeding with work Service Precautions.
NEXT -- Continue to next step.
2. 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.
3. CHECK DLC3
(a) Disconnect the J19 No. 1 CAN junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO DLC3 (CAN-H, CAN-L)
OK -- Continue to next step.
4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
(a) Disconnect the J18 No. 2 CAN junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 CAN JUNCTION CONNECTOR - ECM)
(a) Reconnect the J19 No. 1 CAN junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- REPLACE NO. 2 CAN JUNCTION CONNECTOR
6. CONNECT CONNECTOR
(a) Reconnect the J18 No. 2 CAN junction connector connector.
NEXT -- Continue to next step.
7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER ASSEMBLY - NO. 2 CAN JUNCTION CONNECTOR)
(a) Disconnect the C9 combination meter assembly connector.
(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 COMBINATION METER ASSEMBLY Removal
8. CONNECT CONNECTOR
(a) Reconnect the J18 No. 2 CAN junction connector connector.
NEXT -- Continue to next step.
9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION CONNECTOR - ECM)
(a) Disconnect the J19 No. 1 CAN junction connector connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CONNECT CONNECTOR
OK -- Continue to next step.
10. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN JUNCTION CONNECTOR - NO. 2 CAN JUNCTION CONNECTOR)
(a) 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 NO. 1 CAN JUNCTION CONNECTOR
11. CONNECT CONNECTOR
(a) Reconnect the J19 No. 1 CAN junction connector connector.
NEXT -- Continue to next step.
12. SYSTEM CHECK
(a) Check the vehicle specifications.
Result
B -- CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 CAN JUNCTION CONNECTOR)
A -- Continue to next step.
13. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 CAN JUNCTION CONNECTOR)
(a) Disconnect the E14 ECM connector.
(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 ECM Removal
14. CHECK FOR OPEN IN CAN BUS MAIN WIRE (ECM - NO. 1 CAN JUNCTION CONNECTOR)
(a) Disconnect the E7 ECM connector.
(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 ECM Removal