1998 TOYOTA LAND CRUISER warning light

H21248
BatteryAirbag Sensor
Assembly
B-Y
LA
IG2 AM2
W-R41 Combination Meter
1011
3Q8
2A 2EB-Y
3F
C14Cowl Side J/B RH
MET
B-RC26
63
4
3E 7
3Q 4
C12 A/B
10
MAIN 2A
J4
J/C SB
B-G Cowl Side J/B LH
Engine Room J/B
1
1B1C 9AM23E 11 D7
DLC3
11
F15
FL Block W-R
7B-R
AA SRSSB
I18
Ignition SW
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-927
1120 Author
: Date
:
2004 LAND CRUISER (RM1071U)
SRS Warning Light Circuit Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light comes on for approx. 6 seconds after the ignition switch
is turned from the LOCK position to ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminal TC and CG of the DLC3 are connected, the DTC is indicated by blinking the SRS warning
light.
WIRING DIAGRAM
DIB45-01

AB0117H01293H01295
Airbag Sensor Assembly
LOCK
DI-928
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1121 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
Always lights up, when ignition switch is in LOCK position.
1 Prepare for inspection (See step 1 on page DI-923).
2 Does SRS warning light turn off?
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
(d) Connect the negative (-) terminal cable to the battery.
CHECK:
Check operation of SRS warning light.
NO Check combination mater (See page BE-2).
YES
Replace airbag sensor assembly.

N14677
Fuse
AB0119H01300
H01301
Airbag Sensor Assembly
ON
LA
(+)
(-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-929
1122 Author
: Date
:
2004 LAND CRUISER (RM1071U)
Does not light up, when ignition switch is turned to ON.
1 Check AM2 Fuse.
PREPARATION:
Remove the AM2 fuse.
CHECK:
Check continuity of the AM2 fuse.
OK:
Continuity
HINT:

Fuse may be burnt out even if it appears to be OK during
visual inspection.

If fuse is OK, install it.
NG Go to step 5.
OK
2 Prepare for inspection (See step 1 on page DI-923).
3 Check SRS warning light circuit.
PREPARATION:
Connect the negative (-) terminal cable to the battery, and wait
at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON.
(b) Measure the voltage between the body ground and LA of
the airbag sensor assembly connector.
OK:
Voltage: 10 - 14 V
NG Check SRS warning light bulb or repair SRS
warning light circuit.
OK

AB0119H20916H21236
H21527
Airbag
Sensor
Assembly
Side and Curtain Shield
Airbag Sensor RH (*1)
Side Squib RH (*1)
P Squib
D Squib
Spiral
Cable
Front Airbag
Sensor RH
Front Airbag
Sensor LH
Curtain Shield
Squib LH (*1)
Side and Curtain Shield
Airbag Sensor LH (*1)
Side Squib LH (*1)
Curtain Shield
Squib RH (*1)
Curtain Shield Airbag
Sensor Assembly LH (*1)Curtain Shield Airbag
Sensor Assembly RH (*1)
ON
Seat Position
Sensor Assembly
P/T Squib RH
P/T Squib LH Front Seat Inner Belt
*1: w/ Side Airbag
DI-930
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1123 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Does SRS warning light come on?
PREPARATION:
(a) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(b) Connect the airbag sensor assembly connector.
(c) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON.
(b) Check operation of the SRS warning light.
NO Replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use simulation method to check.

- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-931
1124 Author
: Date
:
2004 LAND CRUISER (RM1071U)
5 Is new AM2 fuse burnt out again?
NO Using simulation method, reproduce malfunc-
tion symptoms (See page IN-26).
YES
Check harness between AM2 fuse and SRS
warning light.

H21249
Airbag Sensor
Assembly
Cowl Side J/B RH
C2619
TC 3F10
2D18 P-B
W-BP-B D7
DLC3
3E 14
7B5
W-B 13
4 CGTC
IF 7B4 J/B No. 7
P-B DI-932
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1125 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TC Terminal Circuit
CIRCUIT DESCRIPTION
DTC output mode is set by connecting terminal TC and CG of the DLC3 the airbag sensor assembly.
The DTCs are displayed by blinking the SRS warning light.
WIRING DIAGRAM
DIB46-02

AB0117AB0119H20916H21240
ON LOCK
AB0119H10688H10654
ON
CG
TC
(+) (-)
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-933
1126 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
If the DTC is not displayed, do the following troubleshooting.
1 Does SRS warning light light up for approx. 6 seconds?
CHECK:
Check operation of the SRS warning light after ignition switch
is turned from LOCK position to ON position.
NO Check SRS warning light system.
(See page DI-927)
YES
2 Check voltage between terminal TC and CG of DLC3.
PREPARATION:
Turn the ignition switch to ON.
CHECK:
Measure the voltage between terminal TC and CG of DLC3.
OK:
Voltage: 4 - 14 V
OK Go to step 4.
NG

AB0119H10689H10656
ON
TC
(+)
(-)
AB0117 AB0119H01302H12918
LOCK
ON
Airbag Sensor Assembly
TC
DI-934
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1127 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check voltage between terminal TC of DLC3 and body ground.
CHECK:
Measure the voltage between the body ground and terminal TC
of DLC3.
OK:
Voltage: 4 - 14 V
OK Check harness between terminal CG of DLC3
and body ground.
NG
4 Check airbag sensor assembly.
PREPARATION:
(a) Turn the ignition switch to LOCK.
(b) Disconnect the negative (-) terminal cable from the bat-
tery, and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
(d) Insert the service wire into terminal TC from back side as
shown in the illustration.
(e) Connect the airbag sensor assembly connector with ser-
vice wire.
(f) Connect the negative (-) terminal cable to the battery.
(g) Turn the ignition switch to ON and wait at least for 20 se-
conds.
(h) Connect the service wire of terminal TC to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
OK Check harness between the airbag sensor as-
sembly and DLC3.
NG
Replace airbag sensor assembly.