VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1241/41

DTC Code DTC Name
C1241/41 Low Battery Positive Voltage

DESCRIPTION

If a malfunction is detected in the power supply circuit, the skid control ECU outputs this DTC and prohibits operations using the fail safe function.

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

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

DTC Code DTC Detection Condition Trouble Area
C1241/41

Any of the following is detected:


  1. At a vehicle speed of 3 km/h (2 mph) or more, the IG1 terminal voltage is 9.5 V or less for 10 seconds or more.

  2. When the ABS solenoid relay remains ON and the IG1 terminal voltage is 9.5 V or less, the relay contact is open (AST terminal voltage is less than 6 V) for 0.2 seconds or more.

  3. When the ABS motor fail safe relay is ON after the ABS motor relay turns ON, the IG1 terminal voltage is 9.5 V or less and the actuator pump drive motor is OFF for 0.1 seconds or more.

  4. With the IG1 terminal voltage 9.5 V or less, the vehicle speed sensor power supply voltage drops for 60 seconds or more.

  • ECU-IG RH fuse

  • Battery

  • Charging system

  • Power source circuit

  • Internal power supply circuit of the skid control ECU

WIRING DIAGRAM

A0163KSE01

INSPECTION PROCEDURE

Note

When replacing the skid control ECU, perform zero point calibration and store system information Click here.

PROCEDURE


  1. INSPECT ECU-IG RH FUSE


    1. A0163J7E03

      Remove the ECU-IG RH fuse from the main body ECU RH (cowl side junction block RH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      ECU-IG RH (10 A) fuse Always Below 1 Ω

    NG

    REPLACE ECU-IG RH FUSE

    OK

  2. CHECK BATTERY


    1. Install the ECU-IG RH fuse.

    2. Check the battery voltage.

      Standard Voltage
      11 to 14 V

    NG

    CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2UR-GSE) Click here

    OK

  3. INSPECT SKID CONTROL ECU (IG1 TERMINAL)


    1. A0163E5E06

      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 engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      J77-1 (IG1) - Body ground Engine switch on (IG) 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)

    OK

  4. INSPECT SKID CONTROL ECU (GND TERMINAL)


    1. A015ZCGE04

      Turn the engine switch off.

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

    3. Disconnect the skid control ECU connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J78-26 (GND1) - Body ground Always Below 1 Ω
      J78-14 (GND2) - Body ground Always Below 1 Ω
      A35*1, J98*2-22 (GND3) - Body ground Always Below 1 Ω

      *1: for LHD

      *2: for RHD


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)

    OK

  5. RECONFIRM DTC


    1. Reconnect the skid control ECU connectors.

    2. Clear the DTCs Click here.

    3. Start the engine.

    4. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

    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 SKID CONTROL ECU Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here