VEHICLE STABILITY CONTROL SYSTEM, Diagnostic DTC:C1225, C1468, C1469, C146A, C146B

DTC Code DTC Name
C1225 SM Solenoid Circuit
C1468 SFR Solenoid Circuit
C1469 SFL Solenoid Circuit
C146A SRR Solenoid Circuit
C146B SRL Solenoid Circuit

DESCRIPTION

These DTCs are stored when a problem is determined in the skid control ECU (brake actuator assembly).

The brake actuator assembly solenoids turn on when signals are received from the skid control ECU (brake actuator assembly) and they control the pressure acting on the wheel cylinders to control the braking force.

DTC No. Detection Item DTC Detection Condition Trouble Area Note
C1225 SM Solenoid Circuit

Any of the following is detected:


  • While switching solenoid is on, overcurrent continues for 0.1 seconds or more.

  • While switching solenoid is off, an open circuit continues for 0.05 seconds or more.

  • While switching solenoid is on, an open circuit continues for 0.05 seconds or more.

  • While switching solenoid is off, current continues to be applied for 0.05 seconds or more.

  • A condition in which the outputs from switching solenoids are different continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)

 -
C1468 SFR Solenoid Circuit

  • Open or short circuit in decompression solenoid continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

  • While holding solenoid outputs ON, overcurrent continues for 0.1 seconds or more.

  • While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  • Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)

 -
C1469 SFL Solenoid Circuit

  • Open or short circuit in decompression solenoid continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

  • While holding solenoid outputs ON, overcurrent continues for 0.1 seconds or more.

  • While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  • Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)

 -
C146A SRR Solenoid Circuit

  • Open or short circuit in decompression solenoid continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

  • While holding solenoid outputs ON, overcurrent continues for 0.1 seconds or more.

  • While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  • Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)

 -
C146B SRL Solenoid Circuit

  • Open or short circuit in decompression solenoid continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, open circuit continues for 0.05 seconds or more.

  • While holding solenoid outputs OFF, current is maintained for 0.05 seconds or more.

  • While holding solenoid outputs ON, overcurrent continues for 0.1 seconds or more.

  • While holding solenoid outputs ON, open circuit continues for 0.05 seconds or more.

  • Difference in holding solenoid LH and RH accuracy continues for 0.2 seconds or more.

  • Solenoid circuit

  • Solenoid valve (brake actuator assembly)

 -
C1225 DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5
Diagnosis Condition - - - - - -
Malfunction Status While switching solenoid is on, overcurrent continues ○ - - - -
While switching solenoid is off, an open circuit continues - ○ - - -
While switching solenoid is on, an open circuit continues - - ○ - -
While switching solenoid is off, current continues to be applied - - - ○ -
A condition in which the outputs from switching solenoids are different continues - - - - ○
Detection Time 0.1 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.2 seconds or more.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

C1468 DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnosis Condition - - - - - - -
Malfunction Status Open or short circuit in decompression solenoid continues ○ - - - - -
While holding solenoid outputs OFF, open circuit continues - ○ - - - -
While holding solenoid outputs OFF, current is maintained - - ○ - - -
While holding solenoid outputs ON, overcurrent continues - - - ○ - -
While holding solenoid outputs ON, open circuit continues - - - - ○ -
Difference in holding solenoid LH and RH accuracy continues - - - - - ○
Detection Time 0.05 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.1 seconds or more. 0.05 seconds or more. 0.2 seconds or more.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

C1469 DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnosis Condition - - - - - - -
Malfunction Status Open or short circuit in decompression solenoid continues ○ - - - - -
While holding solenoid outputs OFF, open circuit continues - ○ - - - -
While holding solenoid outputs OFF, current is maintained - - ○ - - -
While holding solenoid outputs ON, overcurrent continues - - - ○ - -
While holding solenoid outputs ON, open circuit continues - - - - ○ -
Difference in holding solenoid LH and RH accuracy continues - - - - - ○
Detection Time 0.05 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.1 seconds or more. 0.05 seconds or more. 0.2 seconds or more.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

C146A DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnosis Condition - - - - - - -
Malfunction Status Open or short circuit in decompression solenoid continues ○ - - - - -
While holding solenoid outputs OFF, open circuit continues - ○ - - - -
While holding solenoid outputs OFF, current is maintained - - ○ - - -
While holding solenoid outputs ON, overcurrent continues - - - ○ - -
While holding solenoid outputs ON, open circuit continues - - - - ○ -
Difference in holding solenoid LH and RH accuracy continues - - - - - ○
Detection Time 0.05 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.1 seconds or more. 0.05 seconds or more. 0.2 seconds or more.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

C146B DTC Detection Conditions
Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnosis Condition - - - - - - -
Malfunction Status Open or short circuit in decompression solenoid continues ○ - - - - -
While holding solenoid outputs OFF, open circuit continues - ○ - - - -
While holding solenoid outputs OFF, current is maintained - - ○ - - -
While holding solenoid outputs ON, overcurrent continues - - - ○ - -
While holding solenoid outputs ON, open circuit continues - - - - ○ -
Difference in holding solenoid LH and RH accuracy continues - - - - - ○
Detection Time 0.05 seconds or more. 0.05 seconds or more. 0.05 seconds or more. 0.1 seconds or more. 0.05 seconds or more. 0.2 seconds or more.
Number of Trips 1 trip 1 trip 1 trip 1 trip 1 trip 1 trip

Tech Tips

DTC will be output when conditions for either of the patterns in the table above are met.

CAUTION / NOTICE / HINT

Note

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information.

Click here

PROCEDURE


  1. RECONFIRM DTC

    Tech Tips

    The solenoid circuits are in the brake actuator assembly. Therefore, solenoid circuit inspection and solenoid unit inspection cannot be performed. Be sure to check if any DTCs are output before replacing the skid control ECU (brake actuator assembly).


    1. Clear the DTCs.

      Click here


      Chassis > ABS/VSC/TRC > Clear DTCs

    2. Turn the engine switch off.

    3. Start the engine.

    4. Perform a road test.

    5. Check if the same DTC is output.

      Click here


      Chassis > ABS/VSC/TRC > Trouble Codes
      Result
      Result Proceed to
      DTCs C1225, C1468, C1469, C146A and C146B are not output. A
      DTCs C1225, C1468, C1469, C146A and/or C146B are output. (for LHD) B
      DTCs C1225, C1468, C1469, C146A and/or C146B are output. (for RHD) C

      Tech Tips


      • If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU (brake actuator assembly), 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 DTCs are output), slightly jiggle the connectors, wire harness, and fuses of the skid control ECU (brake actuator assembly).

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

      • If no DTCs were output when reconfirming DTCs, checking for intermittent problems is necessary because it is suspected that the original DTCs were stored due to the poor connection of a connector terminal.


    A

    USE SIMULATION METHOD TO CHECK Click here

    B

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here

    C

    REPLACE BRAKE ACTUATOR ASSEMBLY Click here