TOYOTA LAND CRUISER 1998 Factory Repair Manual

H01227H16850H17150
P Squib
(2nd step)
Airbag
Sensor
Assembly
(+) (-)P2+
Dash Wire
DI-910
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1103 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC B1187/55 Short in P Squib (2nd step) Circuit
(to Ground)
CIRCUIT DESCRIPTION
The P squib (2nd step) circuit consists of the airbag sensor assembly and the front passenger airbag assem-
bly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B1187/55 is recorded when ground short is detected in the P squib (2nd step) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1187/55

Short in P squib (2nd step) circuit (to ground)

P squib (2nd step) malfunction

Airbag sensor assembly malfunction
Front passenger airbag assembly (P squib (2nd step))

Airbag sensor assembly

Dash wire
WIRING DIAGRAM
See page DI-903.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-923).
2 Check dash wire(P squib (2nd step) circuit).
CHECK:
Measure the resistance between the body ground and P2+ of
the dash wire connector on the front passenger airbag assem-
bly (P squib (2nd step)) side.
OK:
Resistance: 1 MW or Higher
NG Repair or replace dash wire.
OK
DI8F2-06

H16853H16838AB0118H01023
H10600
H17151
Airbag
Sensor
Assembly
P2+
P2-
DLC3
ON " u
DTC B1187/55
TC CG
P Squib
(2nd step)Dash Wire
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-91 1
1104 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect P2+ and P2- of the dash
wire connector on the front passenger airbag assembly (P
squib (2nd step)) side.
(c) 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:
DTC B1187/55 is not output.
HINT:
Codes other than code B1187/55 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0119H01024
H10600
H16838H17152
"u
ON
DTC B1187/55
DLC3Airbag
Sensor
Assembly
TC CG
P Squib
(2nd step)Dash Wire
DI-912
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1105 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check P squib (2nd step).
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 front passenger airbag assembly (P squib
(2nd step)) to 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, 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 B1187/55 is not output.
HINT:
Codes other than code B1187/55 may be output at this time, but
they are not relevant to this check.
NG Replace front passenger airbag assembly
(P squib (2nd step)).
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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

H01022AB0119H16851H17154
P Squib
(2nd step)Airbag
Sensor
Assembly
(-)(+)P2+
ONDash Wire
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-913
1106 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC B1188/56 Short in P Squib (2nd step) Circuit
(to B+)
CIRCUIT DESCRIPTION
The P squib (2nd step) circuit consists of the airbag sensor assembly and the front passenger airbag assem-
bly.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see OPERATION on page RS-3.
DTC B1188/56 is recorded when a B+ short is detected in the P squib (2nd step) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1188/56

Short in P squib (2nd step) circuit (to B+)

P squib (2nd step) malfunction

Airbag sensor assembly malfunction
Front passenger airbag assembly (P squib (2nd step))

Airbag sensor assembly

Dash wire
WIRING DIAGRAM
See page DI-903.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI-923).
2 Check dash wire (P squib (2nd step) 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 P2+
of the dash wire connector on the front passenger airbag
assembly (P squib (2nd step)) side.
OK:
Voltage: Below 1 V
NG Repair or replace dash wire.
OK
DI8F3-06

AB0118H01023
H10600H16853H16839H17155
Airbag
Sensor
Assembly
P2+
P2-
DTC B1188/56
DLC3
ON " u
TC CG
P Squib
(2nd step)Dash Wire
DI-914
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1107 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect P2+ and P2- of the dash
wire connector on the front passenger airbag assembly (P
squib (2nd step)) side.
(c) 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:
DTC B1188/56 is not output.
HINT:
Codes other than code B1188/56 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
OK

AB0119H01024
H10600
H16839H17156
"u
ON
DTC B1188/56
DLC3Airbag
Sensor
Assembly
TC CG
P Squib
(2nd step)Dash Wire
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-915
1108 Author
: Date
:
2004 LAND CRUISER (RM1071U)
4 Check P squib (2nd step).
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 front passenger airbag assembly (P squib
(2nd step)) to 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, 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 B1188/56 is not output.
HINT:
Codes other than code B1188/56 may be output at this time, but
they are not relevant to this check.
NG Replace front passenger airbag assembly
(P squib (2nd step)).
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. If the malfunctioning part can not be
detected by the simulation method, replace all SRS components including the wire harness.

DI-916
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1109 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC B1628/29 RSCA off Switch Indicator Malfunction
CIRCUIT DESCRIPTION
The RSCA off switch is a mechanism that operates both right and left side of the curtain shield airbag assem-
bly and the seat belt pretensioner when the airbag sensor assembly detects a roll-over.
The RSCA off switch indicator light is installed in the combination meter.
As operating the RSCA off switch, the indicator light comes on to inform the driver that the roll-over detection
system is not working.
The initial setting of the roll-over detection system is on. It automatically operates every time the ignition
switch is turned on.
DTC No.DTC Detecting ConditionTrouble Area
B1628/29
RSCA off indicator circuit malfunction

RSCA off switch

Airbag sensor assembly

Dash wire

Instrument panel wire
HINT:
DTC B1628/29 is indicated only for the vehicle equipped with the side airbag.
DIB44-01

H21246
RMIL
C2625 Airbag Sensor Assembly
RMSW 21 B-W
3F 3Q69 2Cowl Side J/B RH
C26 3E4 MET
3Q7 SB
C CJ15
J/C
Combination Meter
C1210
SB
Cowl Side J/B LH
2A10
W-R2E 41
W-R
7
AM2 IG26 I18
Ignition SW
B-R
AA J4
J/CB-R
Engine Room J/B
1B9AM2
1C1
B-G F15
FL Block
MAIN
AA J12
J/C
2Q43G-W
Ia11
IU18
SB
IF13
3
IF211 4 SB
G-W
G-W
W-B RSCA Off C1319
B-R
SB J7
J/C
C C
SB SB
IFR40
RSCA Off Switch
2
BatteryCowl Side
J/B LH
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-917
111 0 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM

AB0117H01293H01295
LOCK
RMSW
DI-918
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1111 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
The RSCA off indicator light remains on when the RSCA off switch is not op-
erating (Remains ON).
1 Does indicator light turn off?
PREPARATION:
Disconnect the combination meter connector.
CHECK:
(a) Turn the ignition switch to ON.
(b) Check operation of RSCA off indicator light.
OK:
The indicator light does not light up.
NO Check combination meter (See page BE-58).
YES
2 Check wire harness.
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.
CHECK:
Measure the resistance between the body ground and RMSW
on the airbag sensor assembly side between the combination
meter and airbag sensor assembly.
OK:
Resistance: 1 MW or Higher
NG Repair or replace wire harness.
OK

AB0119H01369H10600H21234H21233
Combination
Meter
" uAirbag
Sensor
Assembly
ON
DLC3
CG TC" u
DTC B1628/29
- DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI-919
111 2 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the airbag sensor assembly connector.
(b) Connect the combination meter 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, 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 B2628/29 is not output.
HINT:
Codes other than code B1628/29 may be output at this time, but
they are not relevant to this check.
NG Replace airbag sensor assembly.
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.