VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1241/41

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

DESCRIPTION

If a malfunction is detected in the power supply circuit, the skid control ECU (housed in the actuator assembly) stores this DTC and the fail safe function prohibits ABS operation.

This DTC is stored when the IG1 terminal voltage deviates from the DTC detection condition due to a malfunction in the power supply or charging circuit such as the battery or generator circuit, etc.

The DTC is cancelled when the IG1 terminal voltage returns to normal.

DTC Code DTC Detection Condition Trouble Area
C1241/41

When any of the following is detected:


  1. Battery voltage is 17.4 V or more.

  2. Battery voltage is 9.8 V or less when ABS does not operate.

  3. Battery voltage is 9.4 V or less when ABS operates.

  • ECU-IG fuse

  • Battery

  • Charging system

  • Power source circuit

  • Internal power supply circuit of the skid control ECU

WIRING DIAGRAM

A0137PUE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ECU-IG FUSE


    1. A0136G2E01

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

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

      Standard resistance
      Tester Connection Condition Specified Condition
      ECU-IG (7.5 A) fuse Always Below 1 Ω

    NG

    REPLACE ECU-IG FUSE

    OK

  2. CHECK BATTERY


    1. Install the ECU-IG fuse.

    2. Check the battery voltage.

      Standard voltage
      11 to 14 V

    NG

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY

    OK

  3. INSPECT SKID CONTROL ECU (IG1 TERMINAL)


    1. A0136MKE32

      Disconnect the skid control ECU connector.

    2. Turn the ignition switch to ON.

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      A41-28 (IG1) - Body ground Ignition switch ON 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    OK

  4. INSPECT SKID CONTROL ECU (GND TERMINAL)


    1. A0136MKE30

      Turn the ignition switch to OFF.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      A41-4 (GND1) - Body ground Always Below 1 Ω
      A41-1 (GND2) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  5. RECONFIRM DTC


    1. Reconnect the skid control ECU connector.

    2. Clear the DTC Click here.

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is recorded Click here.

      Result
      Result Proceed to
      DTC (C1241/41) not output A
      DTC (C1241/41) output B

      Tech Tips

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Click here.


    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here