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Home >> Lexus Truck >> 2011 >> RX 450h AWD V6-3.5L (2GR-FXE) Hybrid >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Information Bus >> Testing and Inspection >> Component Tests and General Diagnostics >> Check CAN Bus Lines for Short Circuit >> Part 2

Part 2





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

12. CHECK FOR SHORT IN CAN BUS WIRES (STEERING ANGLE SENSOR)

(a) Reconnect the steering angle sensor connector.

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





Standard Resistance:





Text in Illustration





NG -- REPLACE SPIRAL CABLE WITH STEERING ANGLE SENSOR Removal
OK -- Continue to next step.

13. CHECK FOR SHORT IN CAN BUS WIRE (POWER STEERING ECU)

(a) Reconnect the power steering ECU connector.

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





Standard Resistance:





Text in Illustration





NG -- REPLACE POWER STEERING ECU Removal
OK -- Continue to next step.

14. CHECK FOR SHORT IN CAN BUS WIRES (YAW RATE SENSOR)

(a) Reconnect the yaw rate sensor connector.

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





Standard Resistance:





Text in Illustration





NG -- REPLACE YAW RATE AND ACCELERATION SENSOR Removal
OK -- Continue to next step.

15. CHECK FOR SHORT IN CAN BUS WIRES (CENTER AIRBAG SENSOR ASSEMBLY)

(a) Reconnect the center airbag sensor assembly connector.

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





Standard Resistance:





Text in Illustration





NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal

OK -- REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Removal

16. CHECK FOR SHORT IN CAN BUS WIRE (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:





Text in Illustration





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

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

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





Standard Resistance:





Text in Illustration





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

18. CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C - CERTIFICATION ECU)

(a) Disconnect the certification ECU connector.





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





Standard Resistance:





Text in Illustration





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

19. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - SKID CONTROL ECU)

(a) Disconnect the skid control ECU connector.





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





Standard Resistance:





Text in Illustration





Result:





C -- REPAIR OR REPLACE CAN BUS BRANCH WIRE OR CONNECTOR (CAN NO. 2 J/C - SKID CONTROL ECU)

B -- CHECK FOR SHORT IN CAN BUS WIRES (CAN NO. 2 J/C)
A -- Continue to next step.

20. CHECK FOR SHORT IN CAN BUS WIRE (CAN NO. 2 J/C - NAVIGATION ECU)

HINT
For vehicles without the navigation system, go to the next step.

(a) Disconnect the navigation ECU connector.





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





Standard Resistance:





Text in Illustration





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

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

(a) Reconnect the CAN No. 1 and No. 2 junction connectors.

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





NOTICE:
The resistance must be measured after the main wire connected ECUs (ECM and power management control ECU), and the CAN No. 1 and No. 2 junction connectors are reconnected.

Standard Resistance:





Text in Illustration





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

22. CHECK FOR SHORT IN CAN BUS WIRES (CERTIFICATION ECU)

(a) Reconnect the certification ECU.

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





Standard Resistance:





Text in Illustration





Result:





C -- REPLACE CERTIFICATION ECU (SMART KEY ECU) Removal

B -- REPLACE SKID CONTROL ECU Removal
A -- Continue to next step.

23. CHECK FOR SHORT IN CAN BUS WIRES (SKID CONTROL ECU)

(a) Reconnect the skid control ECU connector.

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





Standard Resistance:





Text in Illustration





Result:





C -- REPLACE SKID CONTROL ECU Removal

B -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY (for HDD) Removal

A -- REPLACE DISPLAY AND NAVIGATION MODULE DISPLAY (for DVD) Removal

24. CHECK FOR SHORT IN CAN BUS WIRE (ECM)

(a) Disconnect the ECM connector.





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





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

Standard Resistance:









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

OK -- REPLACE ECM Removal

25. CHECK FOR SHORT IN CAN BUS WIRES (POWER MANAGEMENT CONTROL ECU)

(a) Disconnect the power management control ECU connector.





(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 - POWER MANAGEMENT CONTROL ECU)

OK -- REPLACE POWER MANAGEMENT CONTROL ECU Removal
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