VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1225/25

DTC Code DTC Name
C1225/25 SM Solenoid Circuit

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
C1225/25

Any of the following is detected:


  1. Open or short in the solenoid circuit continues for 0.05 seconds or more.

  2. While switching solenoid (SM1 or SM2) outputting OFF, an open circuit continues for 0.05 seconds or more.

  3. While switching solenoid (SM1 or SM2) outputting OFF, current continues to be applied for 0.05 seconds or more.

  4. While switching solenoid (SM1 or SM2) outputting ON, overcurrent continues for 0.1 seconds or more.

  5. While switching solenoid (SM1 or SM2) outputting ON, an open circuit continues for 0.05 seconds or more.

  • Brake actuator assembly (SM1 or SM2)

  • SM1 or SM2 circuit

  • Skid control ECU

WIRING DIAGRAM

A0163HAE03

INSPECTION PROCEDURE

Note

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

PROCEDURE


  1. INSPECT BRAKE ACTUATOR ASSEMBLY


    1. A0162ULE09

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

    2. Disconnect the brake actuator connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      13 (SM1+) - 14 (SM1-) Always

      8.1 to 9.1 Ω

      at 25°C (77°F)
      14 (SM1-) - Body ground Always 10 kΩ or higher
      15 (SM2+) - 16 (SM2-) Always

      8.1 to 9.1 Ω

      at 25°C (77°F)
      16 (SM2-) - Body ground Always 10 kΩ or higher

    NG

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE ACTUATOR)


    1. A01626RE08

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      J78-25 (SM1+) - A13-13 (SM1+) Always Below 1 Ω
      J78-25 (SM1+) - Body ground Always 10 kΩ or higher
      J78-12 (SM1-) - A13-14 (SM1-) Always Below 1 Ω
      J78-12 (SM1-) - Body ground Always 10 kΩ or higher
      J78-11 (SM2+) - A13-15 (SM2+) Always Below 1 Ω
      J78-11 (SM2+) - Body ground Always 10 kΩ or higher
      J78-24 (SM2-) - A13-16 (SM2-) Always Below 1 Ω
      J78-24 (SM2-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. RECONFIRM DTC


    1. Reconnect the skid control ECU connector and the brake actuator connector.

    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 (C1225/25) is not output A
      DTC (C1225/25) is output B

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the engine switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.

      • If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU and/or brake actuator assembly. Make sure that no DTCs are output.

      • If any DTCs are output while jiggling a connector or wire harness of the skid control ECU and/or brake actuator assembly, inspect and repair the connector or wire harness.

      • It is suspected that the DTCs were output due to a bad connection of the connector terminal.


    B

    REPLACE SKID CONTROL ECU Click here

    A

    CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) Click here