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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 bus 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
NOTICE:
- Turn the power switch off before measuring the resistances of CAN bus main wires and CAN bus branch wires.
- After the power switch is turned off, check that the key reminder warning system and lighting system are not operating.
- Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power 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 power 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.

PROCEDURE

1. CHECK DLC3




(a) Turn the power switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NOTICE: When the measured value is 132 Ohms or more 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.

B -- REPLACE DLC3 BRANCH WIRE OR CONNECTOR (CANH, CANL)
A -- Continue to next step.
2. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER MAIN BUS WIRE)




(a) Disconnect CAN main bus wire white connector E43 from the No. 1 CAN J/C "B" side (without earth terminal).
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER - NO. 1 CAN J/C)
OK -- Continue to next step.
3. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 1 CAN J/C)




(a) Reconnect CAN main bus wire connector E43 to the No. 1 CAN J/C "B" side (without earth terminal).
(b) Disconnect CAN main bus wire white connector E42 from the No. 1 CAN J/C "A" side (with earth terminal).
NOTICE:
- Before disconnecting the connector, make a note of where it is connected.
- Reconnect the connector to its original position.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






OK -- REPLACE NO. 1 CAN J/C
NG -- Continue to next step.
4. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 CAN J/C - NO. 3 CAN J/C)




(a) Reconnect CAN main bus wire connector E42 to the No. 1 CAN J/C "A" side (with earth terminal).
(b) Disconnect CAN main bus wire connector A42 from the No. 3 CAN J/C (rear of the vehicle).
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE CAN BUS MAIN WIRE OR CONNECTOR (NO. 1 CAN J/C - NO. 2 CAN J/C)
OK -- Continue to next step.
5. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 3 CAN J/C)




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






OK -- REPLACE NO. 3 CAN J/C
NG -- Continue to next step.
6. CHECK FOR OPEN IN CAN BUS MAIN WIRE (NO. 2 CAN J/C - NO. 3 CAN J/C)




(a) Reconnect CAN main bus wire connector A42 to the No. 3 CAN J/C (front of the vehicle).
(b) Disconnect CAN main bus wire connector A40 from the No. 2 CAN J/C (rear of the vehicle).
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE CAN BUS MAIN WIRE OR CONNECTOR (NO. 2 CAN J/C - NO. 3 CAN J/C)
OK -- Continue to next step.
7. CHECK FOR OPEN IN CAN BUS MAIN WIRE (HV CONTROL ECU CAN MAIN BUS WIRE)




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






OK -- REPLACE NO. 2 CAN J/C
NG -- Continue to next step.
8. CHECK FOR OPEN IN CAN BUS MAIN WIRE (HV CONTROL ECU)




(a) Reconnect CAN main bus wire connector A40 to the No. 2 CAN J/C (front of the vehicle).
(b) Disconnect HV control ECU connector A61.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






OK -- REPLACE HYBRID VEHICLE CONTROL ECU
NG -- REPLACE CAN BUS MAIN WIRE OR CONNECTOR (NO. 2 CAN J/C - HV CONTROL ECU)
9. CHECK FOR OPEN IN CAN BUS MAIN WIRE (COMBINATION METER - NO. 1 CAN J/C)




(a) Reconnect CAN main bus wire connector E43 to the No. 1 CAN J/C "B" side (without earth terminal).
(b) Disconnect combination meter connector F1.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






OK -- REPLACE COMBINATION METER
NG -- REPLACE CAN BUS MAIN WIRE OR CONNECTOR (NO. 1 CAN J/C - COMBINATION METER)
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