Dtc C1254 Pressure Sensor Or Switch


DESCRIPTION

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (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, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.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:
When replacing the master cylinder solenoid, perform calibration (LandCruiser RM00000452J00ZX.html).
1.READ VALUE USING INTELLIGENT TESTER (ACCUMULATOR SENSOR)

  1. Turn the ignition switch off.

  1. Connect the intelligent tester to the DLC3.

  1. Depress the brake pedal more than 40 times.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester 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 (LandCruiser RM00000171U02DX.html)

C
REPLACE MASTER CYLINDER SOLENOID (LandCruiser RM00000171U02EX.html)
A


2.RECONFIRM DTC

  1. Clear the DTCs (LandCruiser RM0000046KV016X.html).

  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 (LandCruiser RM0000046KV016X.html).

    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 (LandCruiser RM00000171U02DX.html)

C
REPLACE MASTER CYLINDER SOLENOID (LandCruiser RM00000171U02EX.html)
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)