Page 1454 of 4323
H23244
Occupant Classification ECU
O6
O6 R B17
Buckle SW RH
L
129
5BSW
BGND DI±1252
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1446 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1463 of 4323
H24040
Occupant
Classification ECU
O71
SGD1 O8
Occupant Classification
Sensor Front LH
O77
SIG1
O711
SVC1 SGD1
SIG1
SVC13
2
1O
G
V
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1261
1455 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1473 of 4323
H24040
Occupant
Classification ECU
O72
SGD2 O9
Occupant Classification
Sensor Front RH
O78
SIG2
O712
SVC2 SGD2
SIG2
SVC23
2
1B±Y
LG
P
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1271
1465 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1483 of 4323
H24040
Occupant
Classification ECU
O73
SGD3 O10
Occupant Classification
Sensor Rear LH
O79
SIG3
O75
SVC3 SGD3
SIG3
SVC33
2
1R±B
G±B
Y±B
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1281
1475 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1493 of 4323
H24040
Occupant
Classification ECU
O74
SGD4 O11
Occupant Classification
Sensor Rear RH
O710
SIG4
O76
SVC4 SGD4
SIG4
SVC43
2
1R±W
L±W
Y
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1291
1485 Author: Date:
2005 SEQUOIA (RM1146U)
WIRING DIAGRAM
Page 1502 of 4323
DI±1300
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1494 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1785 Occupant Classification Sensor Front LH
Collision Detection
CIRCUIT DESCRIPTION
DTC B1785 is output when the occupant classification ECU receives a collision detection signal sent by the
occupant classification sensor front LH if an accident occurs.
DTC B1785 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 B1785 can be cleared by ºZero point calibrationº and ºSensitivity checkº.
Therefore, if DTC B1785 is output, first perform ºZero point calibrationº and ºSensitivity checkº.
DTC No.DTC Detecting ConditionTrouble Area
B1785
Front seat assembly RH malfunction
Occupant classification ECU malfunction
Occupant classification sensor front LH detects heavy
load.Front seat assembly RH
(Occupant classification sensor front LH)
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 B1785 is output, perform troubleshooting
for the DTC.
WIRING DIAGRAM
See page DI±1260.
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
DIDH9±01
Page 1507 of 4323
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1305
1499 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1786 Occupant Classification Sensor Front RH
Collision Detection
CIRCUIT DESCRIPTION
DTC B1786 is output when the occupant classification ECU receives a collision detection signal sent by the
occupant classification sensor front RH if an accident occurs.
DTC B1786 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 B1786 can be cleared by ºZero point calibrationº and ºSensitivity checkº.
Therefore, if DTC B1786 is output, first perform ºZero point calibrationº and ºSensitivity checkº.
DTC No.DTC Detecting ConditionTrouble Area
B1786
Front seat assembly RH malfunction
Occupant classification ECU malfunction
Occupant classification sensor front RH detects heavy
load.Front seat assembly RH
(Occupant classification sensor front 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 B1786 is output, perform troubleshooting
for the DTC.
WIRING DIAGRAM
See page DI±1270.
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
DIDHA±01
Page 1512 of 4323
DI±1310
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1504 Author: Date:
2005 SEQUOIA (RM1146U)
DTC B1787 Occupant Classification Sensor Rear LH
Collision Detection
CIRCUIT DESCRIPTION
DTC B1787 is output when the occupant classification ECU receives a collision detection signal sent by the
occupant classification sensor rear LH if an accident occurs.
DTC B1787 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 B1787 can be cleared by ºZero point calibrationº and ºSensitivity checkº.
Therefore, if DTC B1787 is output, first perform ºZero point calibrationº and ºSensitivity checkº.
DTC No.DTC Detecting ConditionTrouble Area
B1787
Front seat assembly RH malfunction
Occupant classification ECU malfunction
Occupant classification sensor rear LH detects heavy
load.Front seat assembly RH
(Occupant classification sensor rear LH)
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 B1787 is output, perform troubleshooting
for the DTC.
WIRING DIAGRAM
See page DI±1280.
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±1147).
OK:
The ºCOMPLETEDº is displayed.
NG Go to step 4.
OK
DIDHB±01
