Multiplex Communication System

NETWORKING: MULTIPLEX COMMUNICATION SYSTEM: TERMINALS OF ECU

1. CHECK GATEWAY ECU

(a) Disconnect the gateway ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

2. CHECK MAIN BODY ECU LH (COWL SIDE JUNCTION BLOCK LH)

(a) Disconnect the main body ECU LH (cowl side junction block LH) connectors.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

3. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

(a) Disconnect the main body ECU RH (cowl side junction block RH) connectors.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

4. CHECK MULTIPLEX TILT AND TELESCOPIC ECU

(a) Disconnect the multiplex tilt and telescopic ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

5. CHECK MULTIPLEX NETWORK MASTER SWITCH

(a) Disconnect the multiplex network master switch connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

6. CHECK OUTER MIRROR CONTROL ECU LH

(a) Disconnect the outer mirror control ECU LH connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

7. CHECK FRONT POWER SEAT SWITCH RH (POSITION CONTROL ECU)

(a) Disconnect the front power seat switch RH (position control ECU) connectors.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

8. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the front certification ECU (smart key ECU assembly) connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

9. CHECK FRONT CONTROLLER (ENGINE ROOM RELAY BLOCK NO. 2)

(a) Disconnect the front controller (engine room relay block No. 2) connectors.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

10. CHECK OUTER MIRROR CONTROL ECU RH

(a) Disconnect the outer mirror control ECU RH connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

11. CHECK FRONT POWER SEAT SWITCH LH (POSITION CONTROL ECU)

(a) Disconnect the front power seat switch LH (position control ECU) connectors.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

12. CHECK SLIDING ROOF CONTROL ECU

(a) Disconnect the sliding roof control ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

13. CHECK RAIN SENSOR

(a) Disconnect the rain sensor connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

14. CHECK POWER SOURCE CONTROL ECU

(a) Disconnect the power source control ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

15. CHECK WINDSHIELD WIPER SWITCH ASSEMBLY

(a) Disconnect the windshield wiper switch assembly connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

16. CHECK COMBINATION METER ECU

(a) Disconnect the combination meter ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

17. CHECK CLEARANCE WARNING ECU

(a) Disconnect the clearance warning ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

18. CHECK AIR CONDITIONING ECU

(a) Disconnect the air conditioning ECU connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

19. CHECK TIRE PRESSURE WARNING ECU AND RECEIVER (w/ Occupant Classification System)

(a) Disconnect the tire pressure warning ECU and receiver connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.

20. CHECK OVERHEAD JUNCTION BLOCK

(a) Disconnect the overhead junction block connector.





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





If the result is not as specified, there may be a malfunction on the wire harness side.