Toyota Sequoia (2005). Manual — part 383
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1327
1521
9
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
10
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
11
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
DI–1328
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1522
12
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 B1790 is not output.
HINT:
Codes other than DTC B1790 may be output at this time, but they are not related to this check.
NG
Replace airbag sensor assembly
(see page
).
OK
END
C84211
H24024
H24005
Occupant
Classification
ECU
Airbag
Sensor
Assembly
A
FSR+
FSR–
B
C
D
E
F
BL1
Seat Wire No. 1
Floor Wire
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1329
1523
13
Check seat wire No. 1 (short to B+).
PREPARATION:
(a)
Turn the ignition switch to the LOCK position.
(b)
Disconnect the negative (–) terminal cable from the bat-
tery, and wait for at least for 90 seconds.
(c)
Disconnect the seat wire No. 1 connector from the floor
wire.
(d)
Connect the negative (–) terminal cable to the battery,
and wait for at least 2 seconds.
CHECK:
(a)
Turn the ignition switch to the ON position.
(b)
Measure the voltage according to the value(s) in the table
below.
OK:
Tester Connection
Condition
Specified Condition
BL1–3 (FSR+) –
Body ground
Ignition switch ON
Below 1 V
BL1–5 (FSR–) –
Body ground
Ignition switch ON
Below 1 V
NG
Repair or replace seat wire No. 1.
OK
Repair or replace floor wire.
C84213
H43694 H24024
H24004
Occupant
Classification
ECU
Airbag
Sensor
Assembly
A
O6
FSR+
FSR–
B
C
D
E
F
Service Wire
BL1
Seat Wire No. 1
Floor Wire
FSR+
FSR–
C84211
H24024
H24005
Occupant
Classification
ECU
Airbag
Sensor
Assembly
A
FSR+
FSR–
B
C
D
E
F
BL1
Seat Wire No. 1
Floor Wire
DI–1330
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1524
14
Check seat wire No. 1 (open).
PREPARATION:
Disconnect the seat wire No. 1 connector from the floor wire.
HINT:
The service wire has already been inserted into connector ”E”.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Condition
Specified Condition
BL1–3 (FSR+) –
BL1–5 (FSR–)
Always
Below 1
Ω
NG
Repair or replace seat wire No. 1.
OK
Repair or replace floor wire.
15
Check seat wire No. 1 (short).
PREPARATION:
Disconnect the seat wire No. 1 connector from the floor wire.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester Connection
Condition
Specified Condition
BL1–3 (FSR+) –
BL1–5 (FSR–)
Always
1 M
Ω
or higher
NG
Repair or replace seat wire No. 1.
OK
Repair or replace floor wire.
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