ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:C1241/41

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

DESCRIPTION

DTC No. DTC Detecting Condition Trouble Area
C1241/41

  1. When the condition that the vehicle speed is 3km/h (2 mph) or more and ECU IG1 terminal voltage is less than 9.5 V has been continued for more than 10 seconds.

  2. When ECU IG1 terminal voltage is less than 9.5 V, the solenoid relay has open circuit, the motor relay has a open circuit and the detection of the solenoid abnormality is accomplished.

  • Battery

  • Charging system

  • Power source circuit

  • Skid Control ECU

WIRING DIAGRAM

A01KG1AE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT FUSES (ECU-IG OF R/B No. 1)


    1. A01KGBQE02
      Text in Illustration
      *1 R/B No. 1
      *2 ECU-IG

      Remove ECU-IG fuse from the R/B No. 1.

    2. Check continuity of ECU-IG fuse.

      OK
      Continuity

    NG

    INSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED TO ECU-IG FUSE

    OK

  2. INSPECT BATTERY (TERMINAL VOLTAGE)


    1. Check the battery positive voltage.

      OK
      Voltage: 10 - 14 V

    NG

    CHECK CHARGING SYSTEM

    OK

  3. CHECK VOLTAGE OF ECU IG POWER SOURCE

    In case of using the intelligent tester:


    1. Select the DATALIST mode on the intelligent tester.

    2. A01KG8JE01

      Check the voltage condition output from the ECU displayed on the intelligent tester.

      OK
      "Normal" is displayed.

      In case of not using the intelligent tester:

    3. Remove the skid control ECU with connectors still connected.

    4. Turn the ignition switch ON, measure voltage between terminals IG1 and GND of skid control ECU connector.

      OK
      Voltage: 10 - 14 V

    OK

    CHECK AND REPLACE SKID CONTROL ECU ASSEMBLY

    NG

  4. CHECK CONTINUITY (GND OF SKID CONTROL ECU -BODY GROUND)


    1. A01KHYCE01

      Disconnect the connector from the skid control ECU.

    2. Measure resistance between terminals GND (S7 - 12, 25) of skid control ECU harness side connector and body ground.

      OK
      Resistance: 1 Ω or less

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK HARNESS AND CONNECTOR (ECU-IG FUSE - SKID CONTROL ECU)


    1. Check for open and short circuit in harness and connector between ECU-IG fuse and skid control ECU Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    CHECK AND REPLACE SKID CONTROL ECU ASSEMBLY