Toyota Sequoia (2005). Manual — part 299
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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
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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
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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
OK
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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
).
NG
Repair or replace harness or connector.
OK
Replace skid control ECU
(See page
).
NOTICE:
When replacing the skid control ECU, perform the zero point calibration (See page
).
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