Part 2

NETWORKING: CAN COMMUNICATION SYSTEM: Check CAN Bus Lines for Short Circuit
- Check CAN Bus Lines for Short Circuit (Continued..)

11. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C - MAIN BODY ECU)

(a) Disconnect the main body ECU connector.





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





Standard Resistance:





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NG -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 1 J/C - MAIN BODY ECU)
OK -- Continue to next step.

12. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 1 J/C)

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

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





Standard Resistance:





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NOTICE:
* The resistance must be measured after the main wire connected ECUs (ECM and combination meter), CAN No. 1 junction connector and No. 2 junction connector are reconnected.
* The resistance must be measured after the CAN No. 1 junction connector branch wire connected ECU and sensor connectors are disconnected.

NG -- REPLACE CAN NO. 1 JUNCTION CONNECTOR
OK -- Continue to next step.

13. CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR)

(a) Connect the probes of an ohmmeter to terminals 6 (CANH) and 14 (CANL) of the DLC3.





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(b) While observing the resistance value shown on the ohmmeter, reconnect each ECU and sensor connector until the resistance becomes abnormal (Below 54 Ohms).

HINT
If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.

NEXT -- REPLACE CORRESPONDING ECU OR SENSOR

14. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - CAN NO. 1 J/C)

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

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





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

Standard Resistance:





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NG -- REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 1 J/C - CAN NO. 2 J/C)
OK -- Continue to next step.

15. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - ECM)

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





Standard Resistance:









NG -- CHECK FOR SHORT IN CAN BUS WIRES (ECM)
OK -- Continue to next step.

16. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the power management control ECU connector.





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





Standard Resistance:





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NG -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - POWER MANAGEMENT CONTROL ECU)
OK -- Continue to next step.

17. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - TRANSMISSION CONTROL ECU)

(a) Disconnect the transmission control ECU connector.





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





Standard Resistance:





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NG -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - TRANSMISSION CONTROL ECU)
OK -- Continue to next step.

18. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - CENTER AIRBAG SENSOR ASSEMBLY)

(a) Disconnect the center airbag sensor assembly connector.





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





Standard Resistance:





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NG -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - CENTER AIRBAG SENSOR ASSEMBLY)
OK -- Continue to next step.

19. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C)

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

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





Standard Resistance:





Text in Illustration





NOTICE:
* The resistance must be measured after the main wire connected ECUs (ECM and combination meter), CAN No. 1 junction connector and No. 2 junction connector are reconnected.
* The resistance must be measured after the CAN No. 2 junction connector branch wire connected ECU and sensor connectors are disconnected.

NG -- REPLACE CAN NO. 2 JUNCTION CONNECTOR
OK -- Continue to next step.

20. CHECK FOR SHORT IN CAN BUS WIRES (ECU, SENSOR)

(a) Connect the probes of an ohmmeter to terminals 6 (CANH) and 14 (CANL) of the DLC3.





Text in Illustration





(b) While observing the resistance value shown on the ohmmeter, reconnect each ECU and sensor connector until the resistance becomes abnormal (Below 54 Ohms).

HINT
If the resistance becomes abnormal when an ECU connector is reconnected, there may be a short in the ECU.

NEXT -- REPLACE CORRESPONDING ECU OR SENSOR

21. CHECK FOR SHORT IN CAN BUS WIRES (COMBINATION METER)

(a) Disconnect the combination meter connector.





Text in Illustration





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





Standard Resistance:





Text in Illustration





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

OK -- REPLACE METER CIRCUIT PLATE NO. 3 (COMBINATION METER ECU) Disassembly

22. CHECK FOR SHORT IN CAN BUS WIRES (ECM)

(a) Disconnect the ECM connector.





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





Standard Resistance:





Text in Illustration





NG -- REPAIR OR REPLACE CAN BUS MAIN WIRE OR CONNECTOR (CAN NO. 2 J/C - ECM)

OK -- REPLACE ECM Removal