Read Value Of Data List Delta S Sensor

a. Connect the intelligent tester to the DLC3.

b. Turn the ignition switch to the ON position.

c. Run the engine until the engine speed reaches 3,000 rpm, and return it back to idle. HINT:

Rev up the engine to ensure sufficient vacuum.

2006 BRAKES Brake Control - Sequoia

d. Select DATA LIST mode on the intelligent.

DATA LIST

Item

Measurement Item/Range (Display)

Normal Condition

Diagnostic Note

PEDAL STROKE

Pedal stroke sensor/ min.: 0 V, max.: 5.1 V

Approximately 2.0 V without the brake pedal depressed.

HINT:

• The result appears on the tester after some delay because a time lag occurs in measurement with a intelligent tester.

• If a signal from the delta S sensor is sent between sampling, the result does not appear on the tester. So be sure to perform the measurement 2 or 3 times.

e. Check that the brake pedal acceleration value of the delta S sensor displayed on the intelligent tester changes, alternatively increasing the brake pedal stroke.

OK: The value changes as shown in the illustration on the left. (The value will return to approximately 2.0 V after the brake pedal is released.)

HINT:

The maximum voltage depends on pedal stroke speed but should not exceed 4.5 V or fall below 0.2 V.

OK: REPLACE SKID CONTROL ECU

2006 BRAKES Brake Control - Sequoia

Fig. 62: Checking That Brake Pedal Acceleration Value Of Delta S Sensor Displayed On Intelligent Tester Changes, Alternatively Increasing Brake Pedal Stroke Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: GO TO NEXT STEP.

2. CHECK HARNESS AND CONNECTOR (DELTA S SENSOR - SKID CONTROL ECU)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: GO TO NEXT STEP.

3. INSPECT DELTA S SENSOR

2006 BRAKES Brake Control - Sequoia a. Disconnect the delta S sensor (pedal stroke speed sensor) connector.

b. Turn the ignition switch to the ON position.

c. Measure the voltage between VCP terminal and body ground.

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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