DTC C1254 Pressure Sensor or Switch

DESCRIPTION

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

Dtc C1254 Pressure Sensor Or Switch. BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

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)

After replacing the master cylinder solenoid, perform zero point calibration ().

1.READ VALUE USING GTS (ACCUMULATOR SENSOR)

Turn the ignition switch off.

Connect the GTS to the DLC3.

Depress the brake pedal more than 40 times.

Turn the ignition switch to ON.

Turn the GTS on.

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.

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)	B
Output value is out of "Normal Condition" range (for RHD)	C
Output value is constant regardless of pump operation (for RHD)	C

REPLACE MASTER CYLINDER SOLENOID ()

A

2.RECONFIRM DTC

Clear the DTCs ().

Turn the ignition switch off.

Depress the brake pedal more than 40 times.

Turn the ignition switch to ON.

Wait until the pump motor stops.

Wait for 15 minutes.

Depress the brake pedal and release it.

Check if the same DTC is output ().

REPLACE MASTER CYLINDER SOLENOID ()

CHECK FOR INTERMITTENT PROBLEMS ()