CAN Communication System

NETWORKING: CAN COMMUNICATION SYSTEM: TERMINALS OF ECU

HINT
Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

1. JUNCTION CONNECTOR

(a) NO. 1 JUNCTION CONNECTOR

Text in Illustration

* *1: w/o Air Suspension

* *2: w/ Air Suspension

* *3: w/ Dynamic Laser Cruise Control System

HINT
* The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
* The connectors can be connected to any terminals on the same side.

(b) NO. 2 JUNCTION CONNECTOR

Text in Illustration

* *1: w/ 4WD

* *2: w/ Bus Buffer ECU

HINT
* The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
* The connectors can be connected to any terminals on the same side.

(c) NO. 3 JUNCTION CONNECTOR (w/ Seat Memory)

Text in Illustration

* *1: w/o Power Back Door

* *2: w/ Power Back Door

HINT
* The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
* The connectors can be connected to any terminals on the same side.

(d) NO. 4 JUNCTION CONNECTOR (FRONT OF THE VEHICLE)

Text in Illustration

* *1: for V Bus

* *2: for MS Bus

* *3: w/ Power Back Door

* *4: w/ Air Suspension

HINT
* The connectors connected to the junction connector can be distinguished by the colors of the bus lines and the connecting side of the connector.
* The connectors can be connected to any terminals on the same side.

(e) NO. 4 JUNCTION CONNECTOR (REAR OF THE VEHICLE)

Text in Illustration

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

3. CHECK SKID CONTROL ECU

(a) Disconnect the A19 skid control ECU connector.

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

4. CHECK MAIN BODY ECU

Text in Illustration

(a) Disconnect the H2, DB and DD main body ECU connectors.

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

* *1: for V Bus

* *2: for MS Bus

5. CHECK ECM

(a) Disconnect the A27 and D56 ECM connectors.

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

6. CHECK AIR CONDITIONING AMPLIFIER

(a) Disconnect the H24 air conditioning amplifier connector.

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

7. CHECK CENTER AIRBAG SENSOR

(a) Disconnect the H56 center airbag sensor connector.

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

8. CHECK COMBINATION METER ECU

Text in Illustration

(a) Disconnect the H37 combination meter ECU connector.

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

* *1: for V Bus

* *2: for MS Bus

9. CHECK STEERING ANGLE SENSOR

(a) Disconnect the H6 steering angle sensor connector.

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

10. CHECK 4WD CONTROL ECU (w/ 4WD)

(a) Disconnect the A28 and A29 4WD control ECU connectors.

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

11. CHECK BUS BUFFER ECU (w/ Bus Buffer ECU)

(a) Disconnect the H66 bus buffer ECU connector.

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

12. CHECK POWER SEAT CONTROL ECU (w/ Seat Memory)

(a) Disconnect the X10 and X11 power seat control ECU connectors.

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

13. CHECK OUTER MIRROR CONTROL ECU (w/ Seat Memory)

(a) Disconnect the M7 and M8 outer mirror control ECU connectors.

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

14. CHECK MULTIPLEX TILT AND TELESCOPIC ECU (w/ Seat Memory)

(a) Disconnect the H57 multiplex tilt and telescopic ECU connector.

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

15. CHECK DISTANCE CONTROL ECU (w/ Dynamic Laser Cruise Control System)

(a) Disconnect the A43 distance control ECU connector.

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

16. CHECK POWER STEERING ECU

(a) Disconnect the H38 power steering ECU connector.

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

17. CHECK SUSPENSION CONTROL ECU (w/ Air Suspension)

(a) Disconnect the O17 and O18 suspension control ECU connectors.

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

18. CHECK POWER BACK DOOR ECU (w/ Power Back Door)

(a) Disconnect the O30 power back door ECU connector.

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