Can Communication System (For Sedan) Diagnosis System

Power Source Network. Yaris. Ncp93, 131
Networking. Yaris. Ncp93, 131

  1. BUS CHECK

  1. CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION

  1. DTC TABLE BY ECU

  1. DTC COMBINATION TABLE

Can Communication System (For Sedan) -- Diagnosis System



BUS CHECK

  1. Select "CAN Bus Check" from the "System Select" screen on the Techstream.

    HINT:
    If any properly connected ECUs or sensors are not displayed, there is a communication stop in the system (YARIS_NCP93 RM000001D3800NX.html).
    Display the "Communication Bus Check" screen for approximately 1 minute and check for ECUs and sensors that are not indicated on the screen.

CHECK INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION

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

    ECU/Sensor name
    		Check method
    Brake actuator (Skid control ECU)
    		Vehicle with ABS
    ABS and traction actuator (Skid control ECU)
    		Vehicle with VSC
    Air conditioning amplifier
    		Vehicle with air conditioning or PTC heater
    Power steering ECU
    		Installed on all vehicles
    Steering sensor
    		Vehicle with VSC
    Yaw rate sensor
    		Vehicle with VSC
    ECM
    		Installed on all vehicles
    Center airbag sensor assembly
    		Installed on all vehicles
    Combination meter ECU
    		Installed on all vehicles
    Main body ECU
    		Installed on all vehicles


DTC TABLE BY ECU
HINT:
  1. In the CAN communication system, CAN communication system DTCs output by the ECU can be displayed by using a Techstream.
  2. If CAN communication system DTCs are output, trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "HOW TO PROCEED WITH TROUBLESHOOTING" (YARIS_NCP93 RM000001D3500JX.html).

  1. BRAKE ACTUATOR (SKID CONTROL ECU)

    HINT:
    DTC communication uses the CAN communication system.

    DTC No.
    		Detection Item
    U0073
    		Control Module Communication Bus OFF

  2. ABS AND TRACTION ACTUATOR (SKID CONTROL ECU)

    HINT:
    DTC communication uses the CAN communication system.

    DTC No.
    		Detection Item
    U0073
    		Control Module Communication Bus OFF
    U0100
    		Lost Communication with ECM/PCM
    U0123
    		Lost Communication with Yaw Rate Sensor Module
    U0124
    		Lost Communication with Lateral Acceleration Sensor Module
    U0126
    		Lost Communication with Steering Angle Sensor Module

  3. POWER STEERING ECU

    HINT:
    DTC communication uses the SIL Line.

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

  4. COMBINATION METER ASSEMBLY

    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
    *: w/ ABS

  5. AIR CONDITIONING AMPLIFIER

    HINT:
    DTC communication uses the CAN communication system.

    DTC No.
    		Detection Item
    B1499/99
    		Multiplex Communication Circuit

  6. STEERING SENSOR

    HINT:
    1. The steering sensor is connected to the CAN communication system but CAN communication DTCs are not output.
    2. If "Steering Angle Sensor" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Steering Angle Sensor Communication Stop Mode." (YARIS_NCP93 RM000000WIH06OX.html)

  7. YAW RATE SENSOR

    HINT:
    1. The yaw rate sensor is connected to the CAN communication system but CAN communication DTCs are not output.
    2. If "Yaw Rate/Deceleration Sensor" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Yaw Rate Sensor Communication Stop Mode." (YARIS_NCP93 RM000000WIJ06SX.html)

  8. ECM

    HINT:
    1. The ECM is connected to the CAN communication system but CAN communication DTCs are not output.
    2. If "Engine" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "ECM Communication Stop Mode." (YARIS_NCP93 RM000001D3H00KX.html)

  9. MAIN BODY ECU

    HINT:
    1. The main body ECU is connected to the CAN communication system but CAN communication DTCs are not output.
    2. If "Main Body" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Main Body ECU Communication Stop Mode." (YARIS_NCP93 RM000001D3P008X.html)

  10. CENTER AIRBAG SENSOR ASSEMBLY

    HINT:
    1. The center airbag sensor assembly is connected to the CAN communication system but CAN communication DTCs are not output.
    2. If "SRS Airbag" is not displayed on the "Communication Bus Check" screen on the Techstream, proceed to "Center Airbag Sensor Communication Stop Mode." (YARIS_NCP93 RM000001D3L009X.html)

DTC COMBINATION TABLE
*1: This DTC may not be output when the CAN communication system malfunctions.
*2: Only output during the trip in which malfunction is detected.
*3: Only stored while malfunction continues.
*4: This DTC is output when communication failures from the ECM and the combination meter ECU occur.
*5: w/ VSC
*6: w/ ABS
*7: w/ VSC or ABS
*1: This DTC may not be output when the CAN communication system malfunctions.
*4: This DTC is output when communication failures from the ECM and the combination meter ECU occur.
*5: w/ VSC
*6: w/ ABS
*7: w/ VSC or ABS

DTC
Trouble Mode
Output from
Output DTC
ECM Communication Stop Mode
Brake Actuator (Skid Control ECU) Communication Stop Mode
ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode
Steering Angle Sensor Communication Stop Mode
Yaw Rate Sensor Communication Stop Mode
ABS and Traction Actuator (Skid Control ECU)
U0073*5
X
X
○*1, *2
X
X
U0100*5
○*3
X
○*1, *3
X
X
U0123*5
X
X
○*1, *2
X
○*2
U0124*5
X
X
○*1, *2
X
○*2
U0126*5
X
X
○*1, *2
○*2
X
Brake Actuator (Skid Control ECU)
U0073*6
X
○*1, *3
X
X
X
Power Steering ECU
U0100
○
X
X
X
X
U0129*7
X
○
○
X
X
Combination Meter ECU
U0100
○
X
X
X
X
U0129*7
X
○
○
X
X
HINT:
  1. ○: It is necessary to check for the trouble mode.
  2. X: DTC is output possibility when open in side of CAN WIRE.

DTC
Trouble Mode
Output from
Output DTC
Power Steering ECU Communication Stop Mode
Center Airbag Sensor Communication Stop Mode
Air Conditioning Amplifier Communication Stop Mode
Combination Meter ECU Communication Stop Mode
Main Body ECU Communication Stop Mode
ABS and Traction Actuator (Skid Control ECU)
U0073*5
X
X
X
X
X
U0100*5
X
X
X
X
X
U0123*5
X
X
X
X
X
U0124*5
X
X
X
X
X
U0126*5
X
X
X
X
X
Brake Actuator (Skid Control ECU)
U0073*6
X
X
X
X
X
Power Steering ECU
U0100
○*1
X
X
X
X
U0129*7
○*1
X
X
X
X
Combination Meter ECU
U0100
X
X
X
○*1
X
U0129*7
X
X
X
○*1
X
HINT:
  1. ○: It is necessary to check for the trouble mode.
  2. X: DTC is output possibility when open in side of CAN WIRE.

  1. Perform troubleshooting according to the combination of DTCs output.

    HINT:
    1. Brake Actuator (Skid Control ECU) Communication Stop Mode: (YARIS_NCP93 RM000001TT0008X.html)
    2. ABS and Traction Actuator (Skid Control ECU) Communication Stop Mode: (YARIS_NCP93 RM000001V2E00WX.html)
    3. Air Conditioning Amplifier Communication Stop Mode (YARIS_NCP93 RM000001D3N009X.html)
    4. Power Steering ECU Communication Stop Mode: (YARIS_NCP93 RM000001D3I008X.html)
    5. Steering Angle Sensor Communication Stop Mode: (YARIS_NCP93 RM000000WIH06OX.html)
    6. Yaw Rate Sensor Communication Stop Mode: (YARIS_NCP93 RM000000WIJ06SX.html)
    7. ECM Communication Stop Mode: (YARIS_NCP93 RM000001D3H00KX.html)
    8. Main Body ECU Communication Stop Mode: (YARIS_NCP93 RM000001D3P008X.html)
    9. Combination Meter ECU Communication Stop Mode: (YARIS_NCP93 RM000001D3M009X.html)
    10. Center Airbag Sensor Communication Stop Mode: (YARIS_NCP93 RM000001D3L009X.html)