2001 TOYOTA SEQUOIA ABS

DI±986
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1180 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1361 / 62 Abnormal Battery Voltage of VSC Sen-
sor
CIRCUIT DESCRIPTION
Supplies power to the VSC sensors (yaw rate and master cylinder pressure sensors) through terminal IG1.
DTC No.DTC Detecting ConditionTrouble Area
C1361/62Voltage from VSC sensor system to ECU is abnormal.

Battery

Charging system

Power source circuit

Skid control ECU

Yaw rate (deceleration) sensor

Master cylinder pressure sensor
DIDME±01

M2
Master Cylinder
Pressure Sensor No.1
F19776
ABS & VSC Actuator
(Skid Control ECU)
IG1 13
S1 B±R 1
IL1 B±R B±R B±RA
J38 J/C
A
J37 8
3C 8
3ASub J/B No.3
B±RInstrument Panel J/B
4
1F
1
1L4
1C
6
1C ECU±IG
AM1
WB±Y
W±L
B±Y W±LI18
Ignition SW
12
AM1 IG1Y1
Yaw Rate (Deceleration)
Sensor
(Shield)G 5 3R
R12 11
S1
24
S1VYS
GYAW
E1 VYS
GYAW
BR
(Shield)
B
R
W30
S1
28
S1
29
S1VCM
PMC VCM
PMC
E1
BR
A
A
A
BRJ28
J/C Instrument Panel J/B
9
1F12
1KW±B
W±B
BR
J8
J/C
IE IG(Shield)
1 2 3
B
R
W26
S1
25
S1
27
S1VCM2
PMC2
E2 VCM2
PMC2
E2
1
S1
32
S1GND1
GND2 W±B
W±B W±B
W±B17
IL1
9
IL1 A
A J18
J/C 8
5ALTF10
Fusible
Link
Block12
B
Battery
IMA
J18
J/CM3
Master Cylinder
Pressure Sensor No.2G 11
10 IL1
IL1
IL1
1 2
3
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±987
1181 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

F19146
Master Cylinder
Pressure Sensor
No. 1Master Cylinder
Pressure Sensor
No. 2
VCM E1VCM2
E2
M3 M2
DI±988
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1182 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check battery positive voltage.
OK:
Voltage: 10 to 14 V
NG Check and repair the charging system
(See page CH±1).
OK
2 Check master cylinder pressure sensor No. 1 and No. 2.
PREPARATION:
Disconnect the master cylinder pressure sensor connectors
No. 1 and No. 2.
CHECK:
(1) Turn the ignition switch to the ON position.
(2) Measure the voltage between terminal VCM and
E1, VCM2 and E2 of the harness side connector.
OK:
Voltage: 4.5 to 5.5 V
NG Go to step 4.
OK

F19145
Yaw Rate
(Deceleration)
Sensor
VYS
GYAW
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
DI±989
1183 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check yaw rate (deceleration) sensor.
PREPARATION:
Disconnect the yaw rate (deceleration) sensor connector.
CHECK:
(1) Turn the ignition switch to the ON position.
(2) Measure the voltage between terminal GYAW and
VYS of the harness side connector.
OK:
Voltage: 10 to 14 V
NG Go to step 4.
OK
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page DI±897).
4 Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor No. 1, master cylinder pressure sensor No. 2, yaw rate
(deceleration) sensor 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 zero point calibration (See page DI±897).

DI±990
± DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
1184 Author: Date:
2005 SEQUOIA (RM1146U)
DTC C1362 / 36 Malfunction in Sensor Offset Value
(VSC Sensor System)
CIRCUIT DESCRIPTION
DTC is output when zero point calibration is not done for the VSC sensors (yaw rate and master cylinder
pressure sensors).
DTC is cleared when zero point calibration is done.
DTC No.DTC Detecting ConditionTrouble Area
C1362 / 36Zero point calibration of the VSC sensor system is not prop-
erly set.Skid control ECU (Perform zero point calibration)
INSPECTION PROCEDURE
1 Perform zero point calibration of the yaw rate (deceleration) sensor and master
cylinder pressure sensor (See page DI±897).
NEXT
2 Check DTC
PREPARATION:
(a) Clear the DTC (See page DI±911).
(b) Turn the ignition switch OFF.
CHECK:
Turn the ignition switch to the ON position, and check if the same DTC still remains in the memory.
RESULT:
DTC is outputA
DTC is not outputB
B END
A
Replace skid control ECU
(See page BR±52).
NOTICE:
When replacing the skid control ECU, perform zero point calibration (See page DI±897).
DI93X±03

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

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

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