CAN COMMUNICATION SYSTEM (w/ VSC) Skid Control ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Skid Control ECU Communication Stop Mode

When either condition below is met:


  • Skid Control (ABS/VSC/TRAC) is not displayed on "Bus Check".

  • "Skid Control ECU Communication Stop Mode" in "DTC Combination Table" applies.

  • Power source or inside skid control ECU

  • Skid control ECU branch wire or connector

  • Brake actuator assembly (skid control ECU)

WIRING DIAGRAM

A01DW75E07

INSPECTION PROCEDURE

Tech Tips

Operating the ignition switch, any switches or any doors triggers related ECU and sensor communication with the CAN, which causes resistance variation.

PROCEDURE


  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL


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

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

      Note

      When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected Click here.


    NEXT

  2. CHECK FOR OPEN IN CAN BUS WIRE (SKID CONTROL ECU BRANCH WIRE)


    1. A01E0DQE06

      Disconnect the S35 skid control ECU connector.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      S35-25 (CANH) - S35-14 (CANL) Ignition switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CANH, CANL)

    OK

  3. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BATTERY AND BODY GROUND)


    1. Reconnect the cable to the negative (-) battery terminal.

      Note

      When disconnecting the cable from the negative (-) battery terminal, some systems need to be initialized after the cable is reconnected Click here.

    2. A01E0DQE07

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S35-1 (GND1) - Body ground Always Below 1 Ω
      S35-13 (GND2) - Body ground

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      S35-12 (+BS) - Body ground Always 11 to 14 V
      S35-34 (IG1) - Body ground Ignition switch ON
      Result
      Result Proceed to
      OK (for LHD) A
      OK (for RHD) B
      NG C

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) Click here