2001 TOYOTA SEQUOIA terminal TC

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1327
1521 Author: Date:
2005 SEQUOIA (RM1146U)
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 RS±111).
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 ºZero point calibrationº (see page DI±1128).
OK:
The ºCOMPLETEDº is displayed.
NEXT
11 Perform sensitivity check.
Using the hand±held tester, perform ºSensitivity checkº (see page DI±1128).
OK:
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NEXT

C84211H24024H24005
Occupant
Classification
ECU
Airbag
Sensor
Assembly
A
FSR+
FSR± B C D E F
BL1Seat Wire No. 1
Floor Wire
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1329
1523 Author: Date:
2005 SEQUOIA (RM1146U)
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 ConnectionConditionSpecified Condition
BL1±3 (FSR+) ±
Body groundIgnition switch ONBelow 1 V
BL1±5 (FSR±) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace seat wire No. 1.
OK
Repair or replace floor wire.

H23821
SVC1SVC2 SVC4 SVC3
O7 Occupant Classification ECU:
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1335
1529 Author: Date:
2005 SEQUOIA (RM1146U)
2 Check connection of connectors.
PREPARATION:
(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.
CHECK:
Check that the connectors are properly connected to the occupant classification ECU and the occupant clas-
sification sensors.
OK:
The connectors are connected securely.
NG Connect connectors, then go to step 1.
OK
3 Check seat wire No. 1 (short to B+).
PREPARATION:
(a) Disconnect the connector from the occupant classifica-
tion ECU and the 4 occupant classification sensors.
(b) Connect the negative (±) terminal cable to the battery.
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 ConnectionConditionSpecified Condition
O7±5 (SVC3) ±
Body groundIgnition switch ONBelow 1 V
O7±6 (SVC4) ±
Body groundIgnition switch ONBelow 1 V
O7±11 (SVC1) ±
Body groundIgnition switch ONBelow 1 V
O7±12 (SVC2) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace seat wire No. 1.
OK

H23821H43699H24595
SVC1SVC2 SVC4 SVC3
O7 Occupant Classification ECU:
O8
O9
O10
O11SVC1
SVC2
SVC3
SVC4 Occupant Classification Sensor
Front LH:
Occupant Classification Sensor
Front RH:
Occupant Classification Sensor
Rear LH:
Occupant Classification Sensor
Rear RH:
DI±1336
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1530 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check seat wire No. 1 (open).
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 90 seconds.
CHECK:
Measure the resistance according to the value(s) in the table
below.
OK:
Tester ConnectionConditionSpecified Condition
O8±1 (SVC1) ±
O7±11 (SVC1)AlwaysBelow 1 W
O9±1 (SVC2) ±
O7±12 (SVC2)AlwaysBelow 1 W
O10±1 (SVC3) ±
O7±5 (SVC3)AlwaysBelow 1 W
O11±1 (SVC4) ±
O7±6 (SVC4)AlwaysBelow 1 W
NG Repair or replace seat wire No. 1.
OK

DI±1338
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1532 Author: Date:
2005 SEQUOIA (RM1146U)
7 Check DTC.
PREPARATION:
(a) Connect the connectors to the occupant classification ECU and the 4 occupant classification sensors.
(b) Connect the negative (±) terminal cable to the battery.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Clear the DTCs stored in memory (see page DI±1147).
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 DI±1147).
OK:
DTC B1793 is not output.
HINT:
Codes other than DTC B1793 may be output at this time, but they are not related to this check.
NG Go to step 8.
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 DI±1137).

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1339
1533 Author: Date:
2005 SEQUOIA (RM1146U)
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 RS±111).
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 ºZero point calibrationº (see page DI±1128).
OK:
The ºCOMPLETEDº is displayed.
NG Go to step 12.
OK
10 Perform sensitivity check.
Using the hand±held tester, perform ºSensitivity checkº (see page DI±1128).
OK:
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NG Go to step 12.
OK

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1341
1535 Author: Date:
2005 SEQUOIA (RM1146U)
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 BO±112, BO±126).
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 ºZero point calibrationº (see page DI±1128).
OK:
The ºCOMPLETEDº is displayed.
NEXT
14 Perform sensitivity check.
Using the hand±held tester, perform ºSensitivity checkº (see page DI±1128).
OK:
Standard value: 27 to 33 kg (59.52 to 72.75 lb)
NEXT
END

H23821
O6
+BGND Occupant Classification ECU:
IG
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1345
1539 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check seat wire No. 1 (source voltage).
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 90 seconds.
(c) Disconnect the connector from the occupant classifica-
tion ECU.
(d) Connect the negative (±) terminal cable to the battery.
CHECK:
(a) Turn the ignition switch to the ON position.
(b) Measure the voltage and resistance according to the val-
ue(s) in the table below.
OK:
Tester ConnectionConditionSpecified Condition
O6±1 (+B) ± Body groundIgnition switch ON10 to 14 V
O6±3 (GND) ±
Body groundAlwaysBelow 1 W
O6±7 (IG) ± Body groundIgnition switch ON10 to 14 V
NG Repair or replace seat wire No. 1.
OK