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 alternator circuit, etc.

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

DTC Code DTC Detection Condition Trouble Area
C1241/41

Any of the following is detected:


  1. IG1 terminal voltage is 16.7 V or more.

  2. IG1 terminal voltage is 9.6 V or less when ABS does not operate.

  3. IG1 terminal voltage is 9.2 V or less when ABS operates.

  • ECU-IG NO. 2 fuse

  • Battery

  • Charging system

  • Power source circuit

  • Internal power supply circuit of the skid control ECU

WIRING DIAGRAM

A01EIOHE03

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT ECU-IG NO. 2 FUSE


    1. A01EL0XE04
      Text in Illustration
      *1 Main Body ECU (Driver Side Junction Block)
      *2 ECU-IG NO. 2 Fuse

      Remove the ECU-IG NO. 2 fuse from the main body ECU (driver side junction block).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG NO. 2 (7.5 A) fuse Always Below 1 Ω

    NG

    REPLACE ECU-IG NO. 2 FUSE

    OK

  2. CHECK BATTERY


    1. Install the ECU-IG NO. 2 fuse.

    2. Check the battery voltage.

      Standard Voltage
      11 to 14 V

    NG

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY Click here

    OK

  3. INSPECT SKID CONTROL ECU (IG1 TERMINAL)


    1. A01EIZEE57
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Brake Actuator (Skid Control ECU))

      Make sure that there is no looseness at the locking part and the connecting part of the connector.

    2. Disconnect the skid control ECU connector.

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A42-28 (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 (GND1 TERMINAL)


    1. A01EIZEE54
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Brake Actuator (Skid Control ECU))

      Turn the ignition switch off.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A42-4 (GND1) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)

    OK

  5. RECONFIRM DTC


    1. Reconnect the skid control ECU connector.

    2. Clear the DTCs 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) is not output A
      DTC (C1241/41) is output B

      Tech Tips

      If troubleshooting has been carried out according to 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 Click here