Can Communication System (W/ Vsc) Open In One Side Of Can Branch Line


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU)

CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU BRANCH WIRE)

CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR)

CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (YAW RATE SENSOR BRANCH WIRE)

CAN COMMUNICATION SYSTEM (w/ VSC) - Open in One Side of CAN Branch Line


DESCRIPTION

If 2 or more ECUs and/or sensors do not appear on the intelligent tester "Bus Check" screen, one side of the CAN branch wire may be open. (One side of the CANH [branch wire]/CANL [branch wire] of the ECU and/or sensor is open.)

Symptom
Trouble Area
2 or more ECUs and/or sensors do not appear on intelligent tester "Bus Check" screen.
  1. One side of CAN branch wire is open
  2. Brake actuator assembly (skid control ECU)
  3. Spiral cable (steering angle sensor)
  4. Yaw rate sensor

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Can Communication.Can Communication System (W/ Vsc).Can Communication System (W/ Vsc) Open In One Side Of Can Branch Line


INSPECTION PROCEDURE

HINT:
  1. Do not remove the ECM and No. 3 junction connector, as they are the end parts of the circuit. If removed, CAN communication will not be possible.
  2. The open circuit confirmation of the ECM, No. 3 junction connector and main wire is performed when checking the CAN bus line in "How to Proceed with Troubleshooting". This inspection only has procedures for checking for an open circuit on one side of a CAN branch wire.
1.CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU)

  1. Disconnect the S25 skid control ECU connector.

  1. Select "Bus Check" on the intelligent tester.

    Result
    Result
    		Proceed to
    Skid Control (ABS/VSC/TRAC) not displayed on intelligent tester.
    		A
    Several ECUs and sensors other than Skid Control (ABS/VSC/TRAC) not displayed on intelligent tester.
    		B


B
Go to step 3
A


2.CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (SKID CONTROL ECU BRANCH WIRE)

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

    CAUTION:
    For vehicles with SRS:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
    NOTICE:
    When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected (Toyota Fortuner RM000004W63000X.html).


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Can Communication.Can Communication System (W/ Vsc).Can Communication System (W/ Vsc) Open In One Side Of Can Branch Line

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    S25-25 (CANH) - S25-14 (CANL)
    		Ignition switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (SKID CONTROL ECU)
OK

REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (Toyota Fortuner RM0000010K0010X.html)

3.CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR)

  1. Disconnect the S23 steering angle sensor connector.

  1. Select "Bus Check" on the intelligent tester.

    Result
    Result
    		Proceed to
    Spiral cable (Steering Angle Sensor) not displayed on intelligent tester.
    		A
    Several ECUs and sensors other than Spiral cable (Steering Angle Sensor) not displayed on intelligent tester.
    		B


B
Go to step 5
A


4.CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (STEERING ANGLE SENSOR BRANCH WIRE)

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

    CAUTION:
    For vehicles with SRS:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
    NOTICE:
    When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected (Toyota Fortuner RM000004W63000X.html).


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Can Communication.Can Communication System (W/ Vsc).Can Communication System (W/ Vsc) Open In One Side Of Can Branch Line

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    S23-4 (CANH) - S23-3 (CANL)
    		Ignition switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (STEERING ANGLE SENSOR)
OK

REPLACE SPIRAL CABLE (STEERING ANGLE SENSOR) (Toyota Fortuner RM000000SS905LX.html)

5.CHECK FOR OPEN IN ONE SIDE OF CAN BRANCH WIRE (YAW RATE SENSOR BRANCH WIRE)

  1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the main wire and the branch wire.

    CAUTION:
    For vehicles with SRS:
    Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.
    NOTICE:
    When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected (Toyota Fortuner RM000004W63000X.html).


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Can Communication.Can Communication System (W/ Vsc).Can Communication System (W/ Vsc) Open In One Side Of Can Branch Line

  1. Disconnect the Y1 yaw rate sensor connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		Switch Condition
    		Specified Condition
    Y1-3 (CANH) - Y1-2 (CANL)
    		Ignition switch off
    		54 to 69 Ω


NG
REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (YAW RATE SENSOR)
OK

REPLACE YAW RATE SENSOR (Toyota Fortuner RM000000SS5045X.html)