CAN COMMUNICATION SYSTEM Skid Control ECU Communication Stop Mode

DESCRIPTION

Detection Item Symptom Trouble Area
Skid Control ECU Communication Stop Mode

  • "ABS/VSC/TRC" is not displayed on the "Communication Bus Check" screen of the intelligent tester

  • Applies to "Skid Control ECU Communication Stop Mode" in the "DTC COMBINATION TABLE"

  • Power source circuit of the skid control ECU

  • Skid control ECU branch line or connector

  • Skid control ECU

Tech Tips

"ABS/VSC/TRC" refers to the circuit that includes the skid control ECU.

WIRING DIAGRAM

A01633XE07
A01633XE06

INSPECTION PROCEDURE

Note


  • Turn the engine switch off before measuring the resistance of CAN bus main wires and CAN bus branch wires.

  • After the engine switch is turned off, check that the key reminder warning system and light reminder warning system are not in operation.

  • Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the engine switch, any other switches, or the doors. If any doors need to be opened in order to check connectors, open the doors and leave them open.

Tech Tips

Operating the engine switch, any switches, or any doors triggers related ECU and sensor communication with the CAN. This communication will cause the resistance value to change.

PROCEDURE


  1. CHECK OPEN IN CAN BUS WIRE (SKID CONTROL ECU BRANCH LINE)


    1. Turn the engine switch off.

    2. Disconnect the skid control ECU connector (J77).

    3. A01621QE04

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

      Standard Resistance
      Tester Connection Switch Condition Specified Value
      J77-8 (CANH) - J77-16 (CANL) Engine switch off 54 to 69 Ω

    NG

    REPAIR OR REPLACE SKID CONTROL ECU BRANCH WIRE OR CONNECTOR (CAN-H, CAN-L)

    OK

  2. CHECK WIRE HARNESS (IG1, GND1)


    1. Disconnect the skid control ECU connectors (J78) and (A35).

    2. A015YMVE05

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

      Standard Resistance
      Tester Connection Condition Specified Value
      J78-26 (GND1) - Body ground Always Below 1 Ω

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

      Standard Voltage
      Tester Connection Switch Condition Specified Value
      J77-1 (IG1) - Body ground Engine switch on (IG) 10 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE SKID CONTROL ECU ASSEMBLY Click here