CAN Communication System

DIAGNOSIS SYSTEM

1. BUS CHECK

a. Select "BUS CHECK" from the "OBD/MOBD MENU" screen.

HINT: The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the intelligent tester.

b. Press "ENTER" on the intelligent tester.

c. The screen displays the ECUs and sensors that are properly connected to the CAN communication system.

HINT: There is a communication stop in the system of any properly connected ECUs or sensors that are not displayed.

2. CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT USE CAN COMMUNICATION

a. Systems (ECUs, sensors) that use CAN communication vary depending on the vehicle's optional settings. Check which systems (ECUs, sensors) are installed on the vehicle.

3. DTC TABLE BY ECU

HINT:
- In the CAN communication system, CAN communication system DTCs can be displayed by the ECU using the intelligent tester.
- If CAN communication system DTCs are output, trouble cannot be determined only by the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING".

a. ECM

HINT: DTC communication uses the CAN communication system.

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b. HYBRID VEHICLE CONTROL ECU

HINT: DTC communication uses the CAN communication system.

c. SKID CONTROL ECU

HINT: DTC communication uses the CAN communication system.

d. ABSORBER CONTROL ECU

HINT: DTC communication uses the SIL line.

e. POWER STEERING ECU

HINT: DTC communication uses the SIL line.

f. SEAT BELT CONTROL ECU

HINT: DTC communication uses the SIL line.

g. STEERING CONTROL ECU

HINT: DTC communication uses the SIL line.

h. ACTIVE STABILIZER CONTROL ECU
For vehicle with active stabilizer suspension system only.

HINT: DTC communication uses the SIL line.

i. NETWORK GATEWAY ECU

HINT: The network gateway ECU is connected to the CAN communication system but CAN communication DTCs are not output.

j. DISTANCE CONTROL ECU

HINT: The distance control ECU is connected to the CAN communication system but CAN communication DTCs are not output.

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4. DTC COMBINATION TABLE

- Check the stop mode by using the results of the BUS CHECK for the clearance warning ECU and the distance control ECU .

a. Perform troubleshooting according to the combination of DTCs output.
- ECM COMMUNICATION STOP MODE.
- SKID CONTROL ECU COMMUNICATION STOP MODE.
- YAW RATE SENSOR COMMUNICATION STOP MODE.
- STEERING ANGLE SENSOR COMMUNICATION STOP MODE.
- SEAT BELT CONTROL ECU COMMUNICATION STOP MODE.
- STEERING CONTROL ECU COMMUNICATION STOP MODE.
- ABSORBER CONTROL ECU COMMUNICATION STOP MODE.
- NETWORK GATEWAY ECU COMMUNICATION STOP MODE.
- POWER STEERING ECU COMMUNICATION STOP MODE.
- HYBRID VEHICLE CONTROL ECU COMMUNICATION STOP MODE.
- FRONT ACTIVE STABILIZER CONTROL ECU COMMUNICATION STOP MODE.
- REAR ACTIVE STABILIZER CONTROL ECU COMMUNICATION STOP MODE.