Toyota Sequoia (2005). Manual — part 424
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1491
1685
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
H23996
LA
A20
14
AB
R
I18
Ignition SW
Combination Meter
Battery
IG2
A20
21
E1
A20
25
E2
A20
26
B
W–B
W–B
B–R
IG2
AM2
6
5
W–R
SRS
B–Y
C5
29
C6
12
C6
24
1D
4
1A
5
1A
3
IGN1
1D
6
1F
9
10
1A
6
1A
8
Instrument Panel J/B
Engine Room J/B
1H
11
1J
7
2C
1
2D
1
AM2
BR
W–B
W–B
J8
J/C
A
A
4
5
B
B
B–O
IE
Airbag Sensor
Assembly
1C
2
Instrument Panel J/B
F10
Fusible Link Block
1C
3
D6
DLC3
11
4B
10
4A
20
4A
10
B–Y
B–Y
1F
W–R
Sub J/B No. 4
DI–1492
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1686
WIRING DIAGRAM
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
DI–1493
1687
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
H23607
I27704
H24031
A20
LA
C5
C5–29
Airbag Sensor Assembly:
Combination Meter:
DI–1494
–
DIAGNOSTICS
SUPPLEMENTAL RESTRAINT SYSTEM
1688
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 Connection
Condition
Specified Condition
A20–14 (LA) – C5–29
Always
Below 1
Ω
A20–14 (LA) –
Body ground
Always
1 M
Ω
or higher
A20–14 (LA) –
Body ground
Ignition switch ON
Below 1 V
NG
Repair or replace wire harness.
OK
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