2001 TOYOTA SEQUOIA wiring diagram

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1315
1509 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1788 Occupant Classification Sensor Rear RH
Collision Detection
CIRCUIT DESCRIPTION
DTC B1788 is output when the occupant classification ECU receives a collision detection signal sent by the
occupant classification sensor rear RH if an accident occurs.
DTC B1788 is also output when the front seat assembly RH is subjected to a strong impact, even if an actual
accident does not occur.
However, when the occupant classification ECU outputs a collision detection signal, even if the vehicle is
not in a collision, DTC B1788 can be cleared by ºZero point calibrationº and ºSensitivity checkº.
Therefore, if DTC B1788 is output, first perform ºZero point calibrationº and ºSensitivity checkº.
DTC No.DTC Detecting ConditionTrouble Area
B1788

Front seat assembly RH malfunction

Occupant classification ECU malfunction

Occupant classification sensor rear RH detects heavy
load.
Front seat assembly RH
(Occupant classification sensor rear RH)

Occupant classification ECU
HINT:
When DTC B1650/32 is detected as a result of troubleshooting for the supplemental restraint system, check
the DTCs stored in the occupant classification ECU. When DTC B1788 is output, perform troubleshooting
for the DTC.
WIRING DIAGRAM
See page DI±1290.
INSPECTION PROCEDURE
1 Perform zero point calibration.
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Using the hand±held tester, perform ºZero point calibrationº (see page DI±1128).
OK:
The ºCOMPLETEDº is displayed.
NG Go to step 4.
OK
DIDHC±01

H02750
O6
Occupant Classification ECU
FSR+
BL13
WW
A2116Airbag Sensor Assembly
A2124
B B
BL15
FSR±FSR+
FSR± 8
4
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1321
1515 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H24041
Occupant
Classification ECU
O7 SVC111
1 O8
Occupant Classification
Sensor Front LH
V
O7 SVC212
O7 SVC35
O7 SVC46 P
Y±B
Y 1
1
1 O9
Occupant Classification
Sensor Front RH
O10
Occupant Classification
Sensor Rear LH
O11
Occupant Classification
Sensor Rear RHSVC1
SVC2
SVC3
SVC4
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1333
1527 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H23999
Occupant
Classification ECU
O6 +B1
BL11
W±R
J49
O6IG 7
O6GND 3 W±R C J/C
I
J48 W±R 2
3D 1
3ASub J/B No. 3
W±R
W±R
W±R
W±B
W±B
BL16 BL12
B±O B±O
J45B J/C
I
J44 B±O 2
4C 2
4DSub J/B No. 4
B±O
Instrument Panel J/B
17
1E 2
1CIGN1
3
1C
2
1E3
1J7
1J I18
Ignition SW
IG2B±R
AM26
5
W±RW±R
Engine Room J/B
8
2C
1
2DECU±B Short Pin
1
2C AM2 F10
FL Block
54B
B
Battery
BK
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1343
1537 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H01451
Airbag Sensor Assembly
A205
D+ Y±B D Squib
A23
Spiral CableA206
D± Y 1
2
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1353
1547 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H01454
Airbag Sensor Assembly
A20 P+4
Y±B A22
P Squib
A20 P±3
Y 1
2
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1375
1569 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H01451
Airbag Sensor Assembly
A208
D2+ Y±R D Squib
A23
Spiral CableA207
D2± Y±G 4
3
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1385
1579 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM

H01454
Airbag Sensor Assembly
A20 P2+1
Y±R A22
P Squib
A20 P2±2
Y±G 3
4
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1407
1601 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM