C1256

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1256/56: Accumulator Low Pressure

DTC C1256/56 - Accumulator Low Pressure

DESCRIPTION

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









INSPECTION PROCEDURE

PROCEDURE

1. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Turn the ignition switch to OFF.
(c) Depress the brake pedal more than 20 times.
(d) Turn the ignition switch to the ON position.
(e) Wait for 99 seconds.
(f) Check if the same DTCs are recorded.





B -- END
A -- Continue to next step.
2. CHECK HYDRAULIC CIRCUIT
(a) Perform hydraulic brake booster on-vehicle inspection (On-Vehicle Inspection).
OK:
Hydraulic circuit is normal (No leakage).
NG -- CHECK AND REPLACE HYDRAULIC CIRCUIT
OK -- Continue to next step.
3. READ VALUE USING DATA LIST (MASTER CYLINDER PRESSURE SENSOR)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Turn Techstream ON.
(d) Select the "Data List" mode on Techstream.

ABS/VSC/TRAC





(e) Check that the accumulator's output value is in the Normal Condition range.
OK:
Accumulator pressure sensor value is in the Normal Condition.
NG -- REPLACE MASTER CYLINDER SOLENOID
OK -- Continue to next step.
4. RECONFIRM DTC
(a) Clear the DTCs (Reading and Clearing Diagnostic Trouble Codes).
(b) Check if the same DTCs are recorded.





B -- END
A -- REPLACE MASTER CYLINDER SOLENOID