2001 TOYOTA SEQUOIA terminal TC

H23040
IG2
A20
DI±1482
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1676 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(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) Disconnect the connectors from the airbag sensor assembly.
(d) Disconnect the connectors from the steering wheel pad.
(e) Disconnect the connectors from the front passenger airbag assembly.
(f) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(g) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(h) Disconnect the connectors from the front seat outer belt LH and RH.
1 Check battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
2 Check source voltage (power source).
PREPARATION:
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
A20±21 (IG2) ±
Body groundIgnition switch ON10 to 14 V
NG Repair or replace wire harness (battery ± airbag
sensor assembly).
OK

H23040E2E1
A20
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1483
1677 Author: Date:
2005 SEQUOIA (RM1146U)
3 Check wire harness (airbag sensor assembly ± body ground).
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
A20±25 (E1) ±
Body groundAlwaysBelow 1 W
A20±26 (E2) ±
Body groundAlwaysBelow 1 W
NG Repair or replace wire harness.
OK

DI±1484
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1678 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check SRS warning light.
PREPARATION:
(a) Connect the connectors to the airbag sensor assembly.
(b) Connect the connectors to the steering wheel pad.
(c) Connect the connectors to the front passenger airbag assembly.
(d) w/ Side and curtain shield airbag:
Connect the connectors to the side airbag assembly LH and RH.
(e) w/ Side and curtain shield airbag:
Connect the connectors to the curtain shield airbag assembly LH and RH.
(f) Connect the connectors to the front seat outer belt LH and RH.
(g) 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, and wait for at least 6 seconds.
(b) Operate all components of the electrical system (defogger, wiper, headlight, heater blower, etc.) and
check the SRS warning light operation.
OK:
The SRS warning light does not come on.
NG Replace airbag sensor assembly
(see page RS±82).
OK
END

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1489
1683 Author: Date:
2005 SEQUOIA (RM1146U)
8 Check 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 the connectors are properly connected to the occupant classification ECU and the 4 occupant classifi-
cation sensors.
OK:
The connectors are connected.
PREPARATION:
Disconnect the connectors from the occupant classification ECU and the 4 occupant classification sensors.
CHECK:
Check the connectors are not damaged or deformed.
OK:
The connectors are normal.
NG Repair or replace connector, then go to step 1.
OK
9 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, and wait for at least 60 seconds.
(b) Clear the DTCs stored in memory (see page DI±1147).
(c) Turn the ignition switch to the LOCK position.
(d) Turn the ignition switch to the ON position, and wait for at least 60 seconds.
(e) Check the DTCs (see page DI±1147).
OK:
DTC is not output.
NG Replace airbag sensor assembly
(see page RS±82).
OK

DI±1490
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1684 Author: Date:
2005 SEQUOIA (RM1146U)
10 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
11 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 on the tester screen.
NEXT
12 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

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1491
1685 Author: Date:
2005 SEQUOIA (RM1146U)
SRS Warning Light Circuit Malfunction (Always light up, when
DTC is not output)
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light comes on for approximately 6 seconds after the ignition
switch is turned from the LOCK position to ON position, and then goes off automatically.
If there is a malfunction in the SRS, the SRS warning light comes on to inform the driver of a problem.
When terminals TC and CG of the DLC3 are connected, the DTCs are displayed by blinking the SRS warning
light.
DIDHU±01

± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±1493
1687 Author: Date:
2005 SEQUOIA (RM1146U)
INSPECTION PROCEDURE
1 Check battery.
CHECK:
Measure the voltage of the battery.
OK:
Voltage: 11 to 14 V
NG Replace battery.
OK
2 Check connection of connectors.
PREPARATION:
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 airbag sensor assembly and combination meter.
OK:
The connectors are connected securely.
NG Connect connectors.
OK
3 Prepare for inspection.
CAUTION:
Be sure to perform the following procedures before troubleshooting to avoid unexpected airbag de-
ployment.
(a) Disconnect the connectors from the airbag sensor assembly.
(b) Disconnect the connectors from the steering wheel pad.
(c) Disconnect the connectors from the front passenger airbag assembly.
(d) w/ Side and curtain shield airbag:
Disconnect the connectors from the side airbag assembly LH and RH.
(e) w/ Side and curtain shield airbag:
Disconnect the connectors from the curtain shield airbag assembly LH and RH.
(f) Disconnect the connectors from the front seat outer belt LH and RH.
NEXT

H23607I27704H24031
A20
LA
C5
C5±29 Airbag Sensor Assembly:
Combination Meter:
DI±1494
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1688 Author: Date:
2005 SEQUOIA (RM1146U)
4 Check wire harness (airbag sensor assembly ± combination meter).
PREPARATION:
(a) Disconnect the connector from the combination meter.
(b) 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 and resistance according to the val-
ue(s) in the table below.
OK:
Tester ConnectionConditionSpecified Condition
A20±14 (LA) ± C5±29AlwaysBelow 1 W
A20±14 (LA) ±
Body groundAlways1 MW or higher
A20±14 (LA) ±
Body groundIgnition switch ONBelow 1 V
NG Repair or replace wire harness.
OK