Toyota Sequoia (2005). Manual — part 373
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1287
1481
8
Replace occupant classification ECU.
(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 occupant classification ECU (see page
HINT:
Perform the inspection using parts from a normal vehicle if possible.
NEXT
9
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.
NG
OK
10
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)
NG
OK
DI–1288
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1482
11
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
END
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1289
1483
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–1290
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1484
DTC
B1783
Occupant Classification Sensor Rear RH
Circuit Malfunction
CIRCUIT DESCRIPTION
The occupant classification sensor rear RH circuit consists of the occupant classification ECU and the occu-
pant classification sensor rear RH.
DTC B1783 is recorded when a malfunction is detected in the occupant classification sensor rear RH circuit.
DTC No.
DTC Detecting Condition
Trouble Area
B1783
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 RH circuit for 2 seconds.
Occupant classification sensor rear RH malfunction
Occupant classification ECU malfunction
Front seat assembly RH
(Occupant classification sensor rear RH)
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 B1783 is output, perform troubleshooting
for the DTC.
DIDH8–01
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