CAN Communication System

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.
- After the ignition switch is turned OFF, the navigation system requires approximately 90 seconds to record various types of memory and settings. As a result, after turning the ignition switch OFF, wait 90 seconds or more before disconnecting the cable from the negative (-) battery terminal.

2. JUNCTION CONNECTOR
(a) NO. 1 JUNCTION CONNECTOR

Wiring color

HINT:
- *1: for V bus
- 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

Wiring color

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

Wiring color

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

3. TERMINALS OF CONNECTORS FOR JUNCTION CONNECTOR (JUNCTION CONNECTOR)

4. CHECK DLC3
(a) Measure the resistance according to the value(s) in the table below.

5. CHECK SKID CONTROL ECU WITH ACTUATOR

(a) Disconnect the A17 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

6. CHECK MAIN BODY ECU

(a) Disconnect the J2, DB and DD ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.

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

7. CHECK ECM

(a) Disconnect the A24 and D74 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.

8. CHECK AIR CONDITIONING AMPLIFIER

(a) Disconnect the J19 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

9. CHECK CENTER AIRBAG SENSOR

(a) Disconnect the J46 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

10. CHECK COMBINATION METER ECU

(a) Disconnect the J28 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.

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

11. CHECK STEERING ANGLE SENSOR

(a) Disconnect the J6 sensor connector.
(b) Measure the resistance according to the value(s) in the table below.

12. CHECK 4WD CONTROL ECU

HINT: For vehicle with 4 wheel drive only.

(a) Disconnect the A25 and A26 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.

13. CHECK BUS BUFFER ECU

HINT: For vehicle with bus buffer ECU only.

(a) Disconnect the J59 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 vehicle with front power seat control system (w/ Seat memory) only.

(a) Disconnect the Z9 and Z10 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.

15. CHECK OUTER MIRROR CONTROL ECU

HINT: For vehicle with front power seat control system (w/ Seat memory) only.

(a) Disconnect the N7 and N8 ECU connectors.
(b) Measure the resistance according to the value(s) in the table below.

16. CHECK MULTIPLEX TILT AND TELESCOPIC ECU

HINT: For vehicle with front power seat control system (w/ Seat memory) only.

(a) Disconnect the J47 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.