Diagnosis 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 via the CAN VIM.




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: Properly connected ECUs or sensors that are not displayed on the screen indicate that a communication stop is occuring in the system,sensor, or ECU which is not displayed.

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







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

3. DTC TABLE BY ECU

HINT:
- For the CAN communication system, CAN communication system DTCs stored in certain ECUs can be displayed 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 (2AZ-FE)

HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0101 is output. Replace the ECM.




b. ECM (2GR-FE)

HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0101 is output. Refer to SFI system.




c. ECT (2AZ-FE)

HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0100 is output. Replace the ECM.




d. ECT (2GR-FE)

HINT:
- DTC communication is via the CAN communication system.
- *: The ECM is malfunctioning if only U0100 is output. Refer to Automatic Transaxle system




e. SKID CONTROL ECU (with VSC)

HINT:
- DTC communication is via the CAN communication system.
- *: TMC made only




f. SKID CONTROL ECU (without VSC)

HINT: DTC communication is via the CAN communication system.




g. COMBINATION METER ECU

HINT: DTC communication is via the CAN communication system.




h. AIR CONDITIONER AMPLIFIER

HINT: DTC communication is via the CAN communication system.




i. MAIN BODY ECU (with smart key system)

HINT:
- DTC communication is via the CAN communication system.
- *: The main body ECU is malfunctioning if B1207 and/or B2326 are output alone. Refer to DTC chart. Diagnostic Trouble Code Descriptions

j. MAIN BODY ECU (without smart key system)

HINT: Although the center airbag sensor is connected to the CAN communication system, CAN communication DTCs are not output.

k. CENTER AIRBAG SENSOR

HINT: Although the center airbag sensor is connected to the CAN communication system, CAN communication DTCs are not output.

l. CERTIFICATION ECU

HINT: Although the Main Body ECU is connected to the CAN communication system, CAN communication DTCs are not output.

4. DTC COMBINATION TABLE







a. with VSC SYSTEM




b. without VSC SYSTEM

c. Perform troubleshooting depending on the combination of DTCs output.

HINT:
- ECM Communication Stop Mode
- Skid Control ECU Communication Stop Mode
- Steering Angle Sensor Communication Stop Mode
- Yaw Rate Sensor Communication Stop Mode
- Combination Meter ECU Communication Stop Mode
- Center Airbag Sensor Communication Stop Mode
- Air Conditioner Amplifier ECU Communication Stop Mode
- Main Body ECU Communication Stop Mode