ANTI-LOCK BRAKE SYSTEM (w/ Rear Differential Lock), Diagnostic DTC:C1241/41

DTC Code DTC Name
C1241/41 Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

DESCRIPTION

This is the power source circuit of the skid control ECU.

The skid control ECU has a built-in brake actuator.

DTC No. DTC Detection Condition Trouble Area
C1241/41

When either of following is detected:

1. Both conditions continue for at least 10 seconds


  • Vehicle speed is more than 3 km/h (2 mph)

  • IG1 terminal voltage is less than 10 V

2. All conditions continue for at least 0.2 seconds


  • Solenoid relay remains ON

  • Relay contact is open

  • IG1 terminal voltage is less than 10 V

  • Battery

  • Charging system

  • Power source circuit

WIRING DIAGRAM

A01E276E01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (ECU-IG & GAUGE)


    1. Remove the ECU-IG & GAUGE fuse from the instrument panel junction block.

    2. Measure the resistance of the fuse.

      Standard resistance
      Below 1 Ω

    NG

    REPLACE FUSE

    OK

  2. INSPECT BATTERY


    1. Check the battery voltage.

      Standard voltage
      11 to 14 V
      Result
      Result Proceed to
      Battery voltage is normal (when using intelligent tester) A
      Battery voltage is normal (when not using intelligent tester) B
      Battery voltage is abnormal C

    B

    CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY) Click here

    C

    RECHARGE OR REPLACE BATTERY

    A

  3. READ VALUE OF INTELLIGENT TESTER (ECU IG POWER VOLTAGE)


    1. Using the Data List, check for proper functioning of the ECU IG power voltage.

      Skid control ECU
      Item Measurement Item / Range (Display) Normal Condition Diagnostic Note
      ECU IG Power Voltage ECU power supply voltage / TOO LOW / NORMAL / TOO HIGH

      TOO HIGH: more than 14.0 V

      NORMAL: 10 to 14.0 V

      TOO LOW: Below 10 V

      		 -
      Result
      Result Proceed to
      Display is NORMAL A
      Display is not NORMAL B

    B

    CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY) Click here

    A

    END

  4. CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)

    A01DV4SE03

    1. Disconnect the S2 ECU connector.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the wire harness side connector.

      Standard voltage
      Tester Connection Specified Condition
      S2-25 (IG1) - Body ground 10 to 14 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  5. CHECK WIRE HARNESS (SKID CONTROL ECU - BODY GROUND)

    A01DV4SE04

    1. Disconnect the S2 ECU connector.

    2. Measure the resistance of the wire harness side connector.

      Standard resistance
      Tester Connection Specified Condition
      S2-2 (GND1) - Body ground Below 1 Ω
      S2-24 (GND2) - Body ground Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  6. CHECK IF DTC OUTPUT RECURS


    1. Clear the DTCs.

    2. Drive the vehicle at approximately 30 km/h (19 mph) or more for 60 seconds or more.

    3. Check for DTCs.

      Result
      Result Proceed to
      DTC is output A
      DTC is not output B

    B

    END

    A

    REPLACE BRAKE ACTUATOR ASSEMBLY