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

  • ECU-IG NO. 2 fuse

  • Battery

  • Charging system

  • Power source circuit

WIRING DIAGRAM

A01J3J1E11

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSE (ECU-IG NO. 2)


    1. Remove the ECU-IG NO. 2 fuse from the engine room 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 USING INTELLIGENT TESTER (ECU IG POWER VOLTAGE)


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

      Skid control ECU
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ECU IG Power Voltage ECU power supply voltage / too Low, Normal or too High Normal -
      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)

    A01J3N2E03

    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)

    A01J3N2E04

    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