CAN Communication System

CAN COMMUNICATION: 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. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

(a) Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.

NOTICE:
Before measuring the resistance, leave the vehicle for at least 1 minute and do not operate the ignition switch, any switches or doors. If doors need to be opened in order to check connectors, open the doors and leave them open.

2. JUNCTION CONNECTOR

(a) NO. 1 JUNCTION CONNECTOR









HINT
* *1: for V bus
* *2: w/ Power Steering ECU

(b) NO. 2 JUNCTION CONNECTOR









HINT
* *1: w/ 4WD
* *2: w/ Bus Buffer ECU

(c) NO. 3 JUNCTION CONNECTOR









HINT
* *1: for MS bus
* *2: w/ Seat Memory

3. CHECK DLC3





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





4. CHECK SKID CONTROL ECU WITH ACTUATOR





(a) Disconnect the A17 skid control ECU with actuator connector.

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





5. CHECK MAIN BODY ECU





(a) Disconnect the J2, DB and DD main body ECU connectors.

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





HINT
* *1: for V bus
* *2: for MS bus

6. CHECK ECM





(a) Disconnect the A24 and D74 ECM connectors.

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





7. CHECK AIR CONDITIONING AMPLIFIER





(a) Disconnect the J19 air conditioning amplifier connector.

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





8. CHECK CENTER AIRBAG SENSOR





(a) Disconnect the J46 center airbag sensor connector.

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





9. CHECK COMBINATION METER ECU





(a) Disconnect the J28 combination meter ECU connector.

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





HINT
* *1: for V bus
* *2: for MS bus

10. CHECK STEERING ANGLE SENSOR





(a) Disconnect the J6 steering angle sensor connector.

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





11. CHECK POWER STEERING ECU

HINT
For vehicles with a power steering ECU only.





(a) Disconnect the J119 power steering ECU connector.

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





12. CHECK 4WD CONTROL ECU

HINT
For vehicles with 4-wheel drive only.





(a) Disconnect the A25 and A26 4WD control ECU connectors.

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





13. CHECK BUS BUFFER ECU

HINT
For vehicles with a bus buffer ECU only.





(a) Disconnect the J59 bus buffer ECU connector.

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





14. CHECK FRONT POWER SEAT CONTROL ECU AND SWITCH LH

HINT
For vehicles with a front power seat control system (w/ Seat Memory) only.





(a) Disconnect the Z9 and Z10 front power seat control ECU and switch LH connectors.

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





15. CHECK OUTER MIRROR CONTROL ECU

HINT
For vehicles with a front power seat control system (w/ Seat Memory) only.





(a) Disconnect the N7 and N8 outer mirror control ECU connectors.

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





16. CHECK MULTIPLEX TILT AND TELESCOPIC ECU

HINT
For vehicles with a front power seat control system (w/ Seat Memory) only.





(a) Disconnect the J47 multiplex tilt and telescopic ECU connector.

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