Toyota Sequoia (2005). Manual - part 299

F14403

F16959

A9
Booster Pedal 
Force Switch 
(ACTIVE Brake Booster)

ABS & VSC Actuator
(Skid Control ECU)

STS

PSNC

PSNO

5

BR–Y

V–W

R–Y

20

S1

18

21

S1

S1

2

1

STS

PSNC

PSNO

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–991

1185

DTC

C1363 / 63

Malfunction in Booster Pedal Force
Switch

CIRCUIT DESCRIPTION

Detects if the brake pedal is depressed.

DTC No.

DTC Detecting Condition

Trouble Area

C1363 / 63

Signal transmitted from booster pedal force switch to ECU

is abnormal.

Booster pedal force switch (Active brake booster)

Booster pedal force switch (Active brake booster) circuit

WIRING DIAGRAM

DIDMF–01

F19145

Yaw Rate 
(Deceleration) 
Sensor

STS

DI–992

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1186

INSPECTION PROCEDURE

1

Check voltage between terminal STS of brake pedal force switch and body
ground.

PREPARATION:
Disconnect the brake pedal force switch connector.
CHECK:
(a)

Turn the ignition switch to the ON position.

(b)

Measure the voltage between STS of brake pedal force
switch harness side connector and body ground.

OK:

Voltage: About 6 V

NG

Go to step 3.

OK

F13989

1

2

(Oscilloscope)

5

(Oscilloscope)

ON

F17283

(Reference)

IG ON Released

Depressed

0 V

6 V

0 V

6 V

PSNC–STS

PSNO–STS

F13990

5

2

1

ON

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

DI–993

1187

2

Check booster pedal force switch.

When using the oscilloscope:
PREPARATION:
(a)

Connect the oscilloscope between terminals PSNO(1)
and STS(5), PSNC(2) and STS(5) of the brake booster
with connector being connected.

(b)

Turn the ignition switch to the ON position.

CHECK:
Check the signal waveform while the brake pedal is depressed
and released.
OK:

When not using the oscilloscope:
PREPARATION:
(a)

Disconnect the connector from the brake booster.

(b)

Turn the ignition switch to the ON position.

CHECK:
Check continuity between the terminals while depressing and
releasing the brake pedal.
OK:

Tester Connection

Condition

Specified Condition

Terminals 2 – 5

Released

Continuity

Terminals 1 – 5

Depressed

Continuity

NG

Replace brake booster 
(See page 

BR–22

).

OK

DI–994

–

DIAGNOSTICS

ABS WITH EBD & BA & TRAC & VSC SYSTEM

1188

3

Check for open and short circuit in harness and connector between booster ped-
al force switch and skid control ECU (See page 

IN–35

).

NG

Repair or replace harness or connector.

OK

Replace skid control ECU
(See page 

BR–52

).

NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page 

DI–897

).