CAN COMMUNICATION SYSTEM > DIAGNOSIS SYSTEM

for Preparation Click here

1. Select "CAN Bus Check" from the "System Select".
   

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

   ECU/Sensor Name	Tester Display	Installed to
   Skid control ECU with actuator	Skid Control (ABS/VSC/TRAC)	All vehicles
   Air conditioning amplifier	Air Conditioning Amplifier	All vehicles
   ECM	ECM (Engine)	All vehicles
   Main body ECU	Main Body	All vehicles
   Combination meter ECU	Combination Meter	All vehicles
   Center airbag sensor assembly	Airbag	All vehicles
   Steering angle sensor	Spiral cable (Steering Angle Sensor)	All vehicles
   Power steering ECU	PPS	Vehicles with power steering ECU
   Bus buffer ECU	Accessory Gateway	Vehicles with bus buffer ECU
   4WD control ECU	Four Wheel Drive Control	Vehicles with 4-wheel drive
   Front power seat control ECU and switch LH (Driver Seat)	D-Seat	Vehicles with front power seat control system (w/ Seat Memory)
   Outer mirror control ECU	Front Door RH/Mirror (FR-Door1/Miror)	Vehicles with front power seat control system (w/ Seat Memory)
   Multiplex tilt and telescopic ECU	Multiplex Tilt and Telescopic	Vehicles with front power seat control system (w/ Seat Memory)

HINT:

1. In the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using the Techstream.
   
2. If CAN communication system DTCs are output, the trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING" (Click here).
   

1. MULTIPLEX TILT AND TELESCOPIC ECU
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   B2621	Communication Interruption
   B2624*	Vehicles Speed

   HINT:

   *: Refer to Power Tilt and Power Telescopic Steering Column System (Click here).

2. MAIN BODY ECU
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   U0199	Lost Communication with "Door Control Module A"
   U0208	Lost Communication with "Seat Control Module A"
   U1002	Lost Communication with Gateway Module
   U1115	Lost Communication with Tilt and Telescopic Module

3. ECM
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   U0155	Lost Communication with Instrument Panel Cluster Control Module (Combination Meter)

4. SKID CONTROL ECU WITH ACTUATOR
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   U0073	Control Module Communication Bus OFF
   U0100	Lost Communication with ECM / PCM "A"
   U0114	Lost Communication with 4-Wheel Drive Clutch Control Module
   U0123	Lost Communication with Yaw Rate Sensor Module
   U0126	Lost Communication with Steering Angle Sensor Module

5. COMBINATION METER ECU
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   U0100	Lost Communication with ECM / PCM "A"
   U0129	Lost Communication with Brake System Control Module

6. AIR CONDITIONING AMPLIFIER
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   B1499	Multiplex Communication Circuit

7. POWER STEERING ECU
   For vehicles with a power steering ECU only.
   
   

   HINT:

   DTC communication uses the CAN communication system.

   
   

   DTC No.	Detection Item
   U0073	Control Module Communication Bus OFF

8. STEERING ANGLE SENSOR
   

   HINT:

   The steering angle sensor is connected to the CAN communication system but CAN communication DTCs are not output.

9. CENTER AIRBAG SENSOR
   

   HINT:

   The center airbag sensor is connected to the CAN communication system but CAN communication DTCs are not output.

10. 4WD CONTROL ECU
    For vehicles with 4-wheel drive only.
    

    HINT:

    The 4WD control ECU is connected to the CAN communication system but CAN communication DTCs are not output.

11. BUS BUFFER ECU
    For vehicles with a bus buffer ECU only.
    

    HINT:

    The bus buffer ECU is connected to the CAN communication system but CAN communication DTCs are not output.

12. FRONT POWER SEAT CONTROL ECU AND SWITCH LH
    For vehicles with a front power seat control system (w/ Seat Memory) only.
    

    HINT:

    The front power control seat ECU and switch LH is connected to the CAN communication system but CAN communication DTCs are not output.

13. OUTER MIRROR CONTROL ECU
    For vehicles with a front power seat control system (w/ Seat Memory) only.
    

    HINT:

    The outer mirror control ECU and switch LH is connected to the CAN communication system but CAN communication DTCs are not output.

HINT:

1. ○: Stored.
   
2. X: When one side of the branch wire is open, storage may occur.
   
3. -: Not stored.
   
4. *1: During a communication stop, cannot be stored.
   
5. *2: Only during failure status.