Inspection Procedure

NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (see INITIALIZATION ).

CHECK BRAKE FLUID LEAKAGE
1. Check that there is no fluid leakage in the brake line between the brake actuator and the wheel cylinder which is the cause of DTCs.
2. Check that the brake is not dragging.
  OK:
  
  There is no fluid leakage or dragging.
NG: REPAIR OR REPLACE APPLICABLE PART

OK: Go to next step

READ VALUE OF INTELLIGENT TESTER (ACCUMULATOR PRESSURE SENSOR)

Check the DATA LIST for proper functioning of the accumulator pressure sensor.

Depress the brake pedal 4 or 5 times to operate the pump motor, and check the output value on the intelligent tester with the motor and check the output value on the intelligent tester with the motor stopped (no braking).

Skid control ECU

DATA LIST REFERENCE

Item	Measurement Item / Range (Display)	Normal Condition	Diagnostic Note
ACC PRESS SENS 1	Accumulator pressure sensor 1 / Min.: 0V, Max.: 5V	Specified value: 3.2 to 4.0 V	-

OK:

Accumulator pressure sensor voltage does not drop.

NG: REPLACE BRAKE ACTUATOR ASSEMBLY

OK: REPLACE SKID CONTROL ECU