Page 1193 of 4323
F14403F16959
A9
Booster Pedal
Force Switch
(ACTIVE Brake Booster)ABS & VSC Actuator
(Skid Control ECU)
STS
PSNC
PSNO5BR±Y
V±W
R±Y20
S1
18
21 S1
S1 2
1STS
PSNC
PSNO
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±991
1185 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1363 / 63 Malfunction in Booster Pedal Force
Switch
CIRCUIT DESCRIPTION
Detects if the brake pedal is depressed.
DTC No.DTC Detecting ConditionTrouble Area
C1363 / 63Signal 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
Page 1194 of 4323
F19145
Yaw Rate
(Deceleration)
Sensor
STS
DI±992
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1186 Author: Date:
2005 SEQUOIA (RM1146U)
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
Page 1195 of 4323

F13989
1
2(Oscilloscope)
5
(Oscilloscope)
ON
F17283
(Reference)IG ON Released Depressed
0 V
6 V
0 V 6 VPSNC±STS
PSNO±STS
F13990
5
21
ON
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±993
1187 Author: Date:
2005 SEQUOIA (RM1146U)
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 ConnectionConditionSpecified Condition
Terminals 2 ± 5ReleasedContinuity
Terminals 1 ± 5DepressedContinuity
NG Replace brake booster
(See page BR±22).
OK
Page 1196 of 4323
DI±994
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1188 Author: Date:
2005 SEQUOIA (RM1146U)
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).
Page 1197 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±995
1189 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 51 Malfunction in ECM Control System
CIRCUIT DESCRIPTION
The circuit is used to send TRAC & VSC control information from the skid control ECU to the ECM, and en-
gine control information from the ECM to the skid control ECU via the vehicle CAN and CAN1 communication
system.
This DTC is output when the engine control system failure signal is received from the ECM.
DTC No.DTC Detecting ConditionTrouble Area
51Translate ECU receives the engine control system failure
signal from ECM for 5 sec. or more.ECM
DIDMG±01
Page 1198 of 4323
F19196
E5
ECM
CANL
CANH34
33W
L2
J53
1
J532
J55
1
J55 J/C
W
R16
T5
14
T5ENG±
ENG+
VSC+
VSC± 7
T5
11
T5 L
W WL7
IL2
6
IL2 26 S1 ABS & VSC Actuator
(Skid Control ECU)Translate
ECU
IG1 1
T5 B±R
J37 J37J/C Sub J/B No.3
8
3C 8
3AB±R
B±R
B±Y
W±L I18
Ignition SW
WInstrument Panel J/B
4
1F
1
1L4
1C
6
1C ECU±IG
AM1
AM1 IG1
ALT
BatteryGND 40
T5 J43
J/C
O
A A O
IG1
2 CANH
CANL
A
A
8
5
BF10
Fusible Link
Block
12(*1)
(*1)
(*2)
(*2)
(*1) Vehicle CAN Circuit
(*2) CAN1 Circuit (*1)
(*1)
(*2)
(*2) DI±996
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1190 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1199 of 4323
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±997
1191 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check the DTC of the VSC (See page DI±911).
CHECK:
Check skid control ECU DTC.
RESULT:
DTC is not outputA
DTC (C1203 / 53) is outputB
B Repair circuit indicated by output code
(See page DI±921).
A
2 Check for open and short circuit in harness and connector between skid control
ECU and translate ECU (CAN1 circuit).
NG Repair or replace harness or connector
(CAN1 circuit).
OK
Replace translate ECU.
Page 1200 of 4323
DI±998
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1192 Author: Date:
2005 SEQUOIA (RM1146U)
DTC 53 Malfunction in CAN1 Communication
CIRCUIT DESCRIPTION
The circuit is used to send TRAC&VSC control information from the skid control ECU to the ECM, and engine
control information from the ECM to the skid control ECU via the CAN communication system.
This DTC is output when communication between the translate ECU and the skid control ECU is cut off.
DTC No.DTC Detecting ConditionTrouble Area
53
IG1 voltage is 8.5 V or more, and the condition that data
from skid control ECU cannot be received continues for 5
sec. or more.VSC+, VSC± circuit (CAN1 communication system)
Skid control ECU
Translate ECU
DIDMH±01