TOYOTA LAND CRUISER 1998 Factory Repair Manual

H03360H21265H08058H21728
Airbag
Sensor
Assembly
(+)+SL Airbag Sensor
Assembly
(-)
-SL +SL-SLFront
Airbag
Sensor
LH
H21557H08399H21729
Airbag
Sensor
Assembly
(+)+SL
(-)
-SL Airbag Sensor
AssemblyFront
Airbag
Sensor
LH
DI-830
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1023 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check wire harness.
PREPARATION:
Using a service wire, connect +SL and -SL on the front airbag
sensor LH side between the airbag sensor assembly and the
front airbag sensor LH.
CHECK:
Measure the resistance between +SL and - SL on the airbag
sensor assembly side between the front airbag sensor LH and
the airbag sensor assembly.
OK:
Resistance: Below 1 W
NG Go to step 8.
OK
5 Check wire harness (to ground).
CHECK:
Measure the resistance between the body ground and each of
+SL and -SL on the airbag sensor assembly side between the
front airbag sensor LH and the airbag sensor assembly.
OK:
Resistance: 1 MW or Higher
NG Go to step 10.
OK

AB0119H21557H08065H21730
Airbag
Sensor
Assembly
(+)+SL
(-)
-SL Airbag Sensor
Assembly
ONFront
Airbag
Sensor
LH
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-831
1024 Author
: Date
:
2004 LAND CRUISER (RM1071U)
6 Check wire harness (to B+).
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 each
of +SL and -SL on the airbag sensor assembly side be-
tween the front airbag sensor LH and the airbag sensor
assembly.
OK:
Voltage: Below 1 V
NG Go to step 12.
OK

AB0119H10600H16834H16835H21556H21721
Airbag
Sensor
Assembly
ON
DTC B1149/37 DLC3
CG
TC
"u "u
DTC B1148/36
Front
Airbag
Sensor
RH
DI-832
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1025 Author
: Date
:
2004 LAND CRUISER (RM1071U)
7 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) Connect the connector to the airbag sensor assembly.
(d) Change the front airbag sensor RH position with LH posi-
tion.
(e) Connect the negative (-) terminal cable to the battery,
and wait at least for 2 seconds.
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(b) Clear the DTC stored in memory (See page DI-692).
(c) Turn the ignition switch to LOCK, and wait at least for 10
seconds.
(d) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(e) Check the DTC (See page DI-692).
OK:
Neither DTC B1148/36 nor B1149/37 not output.
HINT:
Codes other than code B1149/37 or B1148/36 may be output
at this time, but they are not relevant to this check.
NG Replace airbag sensor assembly
(DTC B1149/37 is output).
NG Replace front airbag sensor LH
(DTC B1148/36 is output).
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.

H21555H03360H09507H21722
Airbag
Sensor
Assembly u"Front
Airbag
Sensor
LH
Engine Room
Main Wire
+SL
-SL
(+)
(-)
+SL
-SL
H03360H21554H16251H21723
Airbag
Sensor
Assembly u"Front
Airbag
Sensor
LH
Engine Room
No. 2 Wire
+SL
-SL
(+)
(-)
+SL -SL
Dash Wire
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-833
1026 Author
: Date
:
2004 LAND CRUISER (RM1071U)
8 Check engine room main wire.
PREPARATION:
(a) Disconnect the engine room main wire connector on the
airbag sensor assembly side.
(b) Using a service wire, connect +SL and -SL of the engine
room main wire on the front airbag sensor LH side.
CHECK:
Measure the resistance between +SL and -SL of the engine
room main wire connector on the airbag sensor assembly side.
OK:
Resistance: Below 1 W
NG Repair or replace engine room main wire.
OK
9 Check engine room No. 2 wire.
PREPARATION:
(a) Disconnect the engine room No. 2 wire connector from
the dash wire.
(b) Using a service wire, connect +SL and -SL of the engine
room No. 2 wire on the engine room main wire side.
CHECK:
Measure the resistance between +SL and -SL of the engine
room No. 2 wire connector on the dash wire side.
OK:
Resistance: Below 1 W
NG Repair or replace engine room No. 2 wire.
OK
Repair or replace dash wire.

H21553H03362H21724
Airbag
Sensor
Assembly u"Front
Airbag
Sensor
LH
Engine Room
Main Wire
(+) (-)
+SL -SL
H21552H16252H21725
Airbag
Sensor
Assembly u"Front
Airbag
Sensor
LH
Engine Room
No. 2 Wire
(+) (-)
+SL
-SL
Dash Wire
DI-834
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1027 Author
: Date
:
2004 LAND CRUISER (RM1071U)
10 Check engine room main wire (to ground).
PREPARATION:
Disconnect the engine room main wire connector on the airbag
sensor assembly side.
CHECK:
Measure the resistance between the body ground and each of
+SL and -SL of the engine room main wire connector on the air-
bag sensor assembly side.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire.
OK
11 Check engine room No. 2 wire (to ground).
PREPARATION:
Disconnect the engine room No. 2 wire connector from the dash
wire.
CHECK:
Measure the resistance between the body ground and each of
+SL and -SL of the engine room No. 2 wire connector on the
dash wire side.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room No. 2 wire.
OK
Repair or replace dash wire.

H21553AB0119H03364H21726
Airbag
Sensor
Assembly u"Front
Airbag
Sensor
LH
Engine Room
Main Wire
(+)
(-)
+SL
-SL
ON
H21552AB0119H16253H21727
ONAirbag
Sensor
Assembly u"
Front
Airbag
Sensor
LH
Engine Room
No. 2 Wire
(+) (-)
+SL -SL
Dash Wire
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-835
1028 Author
: Date
:
2004 LAND CRUISER (RM1071U)
12 Check engine room main wire (to B+).
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 engine room main wire connector on the
airbag sensor assembly side.
(d) 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 each
of +SL and -SL of the engine room main wire connector
on the airbag sensor assembly side.
OK:
Voltage: Below 1 V
NG Repair or replace engine room main wire.
OK
13 Check engine room No. 2 wire (to B+).
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 engine room No. 2 wire connector from
the dash wire.
(d) 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 each
of +SL and -SL of the engine room No. 2 wire connector
on the dash wire side.
OK:
Voltage: Below 1 V
NG Repair or replace engine room No. 2 wire.
OK
Repair or replace dash wire.

H21794
S17 Seat Position Sensor
Airbag Sensor Assembly
LSP-
LSP+ C253
BM2
L-RR
C25
C25 C25 R
L-R
BM22
1(*1) (*2)
(*1) (*2)8
4
3
*1: w/ Side Airbag
*2: w/o Side Airbag 1
2 DI-836
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1029 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC B1153/25 Seat Position Sensor Assembly Mal-
function
CIRCUIT DESCRIPTION
The seat position sensor circuit consists of the airbag sensor assembly and the seat position sensor assem-
bly.
For details of the function of each components, see OPERATION on page RS-3.
B1153/25 is recorded when a malfunction is detected in the seat position sensor circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1153/25
Seat position sensor assembly malfunction

Seat position sensor assembly

Airbag sensor assembly

Floor No. 1 wire

Front seat wire LH
HINT:
DTC B1153/25 is indicated only for the vehicle equipped with the side airbag and without the side airbag
(dual stage airbag).
WIRING DIAGRAM
DIB3X-01

AB0119H10600H16831H19293
ON
DLC3
CG TCDTC B1153/25
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-837
1030 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Is DTC B1153/25 output ?
CHECK:
(a) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(b) Clear the DTC stored in memory (See page DI-692).
(c) Turn the ignition switch to LOCK, and wait at least for 10
seconds.
(d) Turn the ignition switch to ON, and wait at least for 10 se-
conds.
(e) Check the DTC (See page DI-692).
OK:
DTC B1153/25 is output.
HINT:
Codes other than code B1153/25 may be output at this time, but
they are not relevant to this check.
NO The malfunctioning part can now be considered
normal. To make sure of this, use the simulation
method to check.
YES
2 Is connector of the seat position sensor assembly properly connected ?
NO Connect connector.
YES
3 Prepare for inspection (See step 1 on DI-923).

H19236H21576H21582H21738
Airbag
Sensor
Assembly
LSP-
Seat
Position
Sensor
Assembly
Airbag Sensor
Assemblyw/o Side Airbag:
(-) LSP+
(+)
(+)
(-)
Airbag Sensor
Assemblyw/ Side Airbag:
LSP- LSP+
H21577H21583H21739
Airbag
Sensor
Assembly
Seat
Position
Sensor
Assembly
(+)
(-)
Airbag Sensor
Assemblyw/o Side Airbag:
LSP-LSP+LSP+
LSP-
(+)
(-)
Airbag Sensor
Assemblyw/ Side Airbag:
DI-838
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1031 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check wire harness.
PREPARATION:
Using a service wire, connect LSP+ and LSP- of the connector
on the seat position sensor assembly side between the airbag
sensor assembly and the seat position sensor assembly.
CHECK:
Measure the resistance between LSP+ and LSP- of the con-
nector on the airbag sensor assembly side between the seat
position sensor assembly and the airbag sensor assembly.
OK:
Resistance: Below 1 W
NG Go to step 9.
OK
5 Check wire harness (to ground).
PREPARATION:
Release the service wire from the connector on the seat posi-
tion sensor assembly side.
CHECK:
Measure the resistance between the body ground and each of
LSP+ and LSP- of the connector on the airbag sensor assem-
bly side between the seat position sensor assembly and the air-
bag sensor assembly.
OK:
Resistance: 10 kW or Higher
NG Go to step 10.
OK

H21584H21578AB0119H21740
Airbag
Sensor
Assembly
Seat
Position
Sensor
Assembly
(+)
(-)
Airbag Sensor
Assemblyw/o Side Airbag:
LSP-LSP+
LSP+ LSP-
(+)
(-)
Airbag Sensor
Assemblyw/ Side Airbag:
ON
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-839
1032 Author
: Date
:
2004 LAND CRUISER (RM1071U)
6 Check wire harness (to B+).
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 each
of LSP+ and LSP- of the connector on the airbag sensor
assembly side between the seat position sensor assem-
bly and the airbag sensor assembly.
OK:
Voltage: Below 1 V
NG Go to step 11.
OK