Dtc C1254 Pressure Sensor Or Switch

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

READ VALUE USING GTS (ACCUMULATOR SENSOR)

RECONFIRM DTC

DTC C1254 Pressure Sensor or Switch


DESCRIPTION

The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid.

Land Cruiser. Urj200, 202 Grj200 Vdj200.Brake Control Dynamic Control Systems.Anti-Lock Brake System. Dtc C1254 Pressure Sensor Or Switch


DTC Code
DTC Detection Condition
Trouble Area
C1254
There is an accumulator pressure sensor malfunction (the fluid pressure does not change when the pump operates or when the brake is applied).
Master cylinder solenoid (Accumulator pressure sensor)

INSPECTION PROCEDURE

NOTICE:
After replacing the master cylinder solenoid, perform zero point calibration (Click here).
1.READ VALUE USING GTS (ACCUMULATOR SENSOR)

  1. Turn the ignition switch off.

  1. Connect the GTS to the DLC3.

  1. Depress the brake pedal more than 40 times.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

    ABS/VSC/TRC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Accumulator Sensor
    		Accumulator pressure sensor reading/ Min.: 0.00 V, Max.: 5.00 V
    		3.58 to 5 V
    		If the value is constant regardless of the pump operation, an accumulator pressure sensor malfunction is suspected.

  1. Check the accumulator output value.

    Result
    Result
    		Proceed to
    Output value is within "Normal Condition" range
    		A
    Output value is out of "Normal Condition" range (for LHD)
    		B
    Output value is constant regardless of pump operation (for LHD)
    Output value is out of "Normal Condition" range (for RHD)
    		C
    Output value is constant regardless of pump operation (for RHD)


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A


2.RECONFIRM DTC

  1. Clear the DTCs (Click here).

  1. Turn the ignition switch off.

  1. Depress the brake pedal more than 40 times.

  1. Turn the ignition switch to ON.

  1. Wait until the pump motor stops.

  1. Wait for 15 minutes.

  1. Depress the brake pedal and release it.

  1. Check if the same DTC is output (Click here).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output (for LHD)
    		B
    DTC is output (for RHD)
    		C


B
REPLACE MASTER CYLINDER SOLENOID (Click here)

C
REPLACE MASTER CYLINDER SOLENOID (Click here)
A

CHECK FOR INTERMITTENT PROBLEMS (Click here)