Toyota Sequoia (2005). Manual — part 371
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DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1279
1473
12
Replace front seat assembly RH.
(a)
Turn the ignition switch to the LOCK position.
(b)
Disconnect the negative (–) terminal cable from the battery, and wait for at least 90 seconds.
(c)
Replace the front seat assembly RH (see page
NEXT
13
Perform zero point calibration.
(a)
Connect the negative (–) terminal cable to the battery.
(b)
Connect the hand–held tester to the DLC3.
(c)
Turn the ignition switch to the ON position.
(d)
Using the hand–held tester, perform ”Zero point calibration” (see page
).
OK:
The ”COMPLETED” is displayed.
NEXT
14
Perform sensitivity check.
Using the hand–held tester, perform ”Sensitivity check” (see page
OK:
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NEXT
END
DI–1280
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1474
DTC
B1782
Occupant Classification Sensor Rear LH
Circuit Malfunction
CIRCUIT DESCRIPTION
The occupant classification sensor rear LH circuit consists of the occupant classification ECU and the occu-
pant classification sensor rear LH.
DTC B1782 is recorded when a malfunction is detected in the occupant classification sensor rear LH circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B1782
The occupant classification ECU receives a line short
circuit signal, an open circuit signal, a short circuit to
ground signal or a short circuit to B+ signal in the occu-
pant classification sensor rear LH circuit for 2 seconds.
Occupant classification sensor rear LH malfunction
Occupant classification ECU malfunction
Front seat assembly RH
(Occupant classification sensor rear LH)
Occupant classification ECU
Seat wire No. 1
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 B1782 is output, perform troubleshooting
for the DTC.
DIDH7–01
H24040
Occupant
Classification ECU
O7
3
SGD3
O10
Occupant Classification
Sensor Rear LH
O7
9
SIG3
O7
5
SVC3
SGD3
SIG3
SVC3
3
2
1
R–B
G–B
Y–B
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DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1281
1475
WIRING DIAGRAM
DI–1282
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1476
INSPECTION PROCEDURE
HINT:
If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installa-
tion bolts to see the under surface of seat cushion.
In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time
may cause a problem, such as seat rail deformation. Hold the seat only as necessary.
1
Check DTC.
CHECK:
(a)
Turn the ignition switch to the ON position.
(b)
Clear the DTCs stored in memory (see page
).
HINT:
First clear DTCs stored in the occupant classification ECU and then in the airbag sensor assembly.
(c)
Turn the ignition switch to the LOCK position.
(d)
Turn the ignition switch to the ON position.
(e)
Using the hand–held tester, check the DTCs of the occupant classification ECU (see page
OK:
DTC B1782 is not output.
HINT:
Codes other than DTC B1782 may be output at this time, but they are not related to this check.
NG
OK
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use the simulation method to check (see page
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