TOYOTA LAND CRUISER 1996 J80 Workshop Manual

R05897
R13006 AB0118AB0119
W02043 H00014
Airbag
Sensor
Assembly
P Squib
D Squib Spiral
Cable
ACC ON
or
DLC1 Code 12
E1 Tc
DI−258
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
6 Check P squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect front passenger airbag assembly connector.
(d) Connect negative ( −) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory. (See page DI−240 )
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843−18020
(f) Check DTC.
OK:
DTC 12 is not output.
HINT:
Codes other than code 12 may be output at this time, but they
are not relevant to this check.
NG Replace front passenger airbag 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.
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R05899
AB0119
R14288
H00015
Airbag Sensor
Assembly
P Squib
D Squib Spiral
Cable
D+
(+)(−) ON
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−259
1996 LAND CRUISER (RM451U)
7 Check spiral cable.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect connector between airbag sensor assembly
and spiral cable.
(c) Turn ignition switch ON.
CHECK:
Measure voltage at D+ on spiral cable side of connector be-
tween spiral cable and steering wheel pad and body ground.
OK:
Voltage: 0 V
NG Repair or replace spiral cable.
OK
Repair or replace harness or connector between airbag sensor assembly an\
d spiral cable.
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R15194
Airbag Sensor
Assembly
Spiral
Cable
D Squib
1
2 3 4
W
B D
+
D−
DI−260
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
DTC 14 Open in D Squib Circuit
CIRCUIT DESCRIPTION
The D squib circuit consists of the airbag sensor assembly, spiral cable and the steering wheel pad.
It causes the airbag to deploy when the airbag deployment conditions are\
satisfied.
For details of the function of each component, see FUNCTION OF COMPONENT\
S on page RS−2.
DTC 14 is recorded when an open is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
14
 Open circuit in D+ wire harness or D− wire harness of
squib
 D squib malfunction
 Spiral cable malfunction
 Center airbag sensor assembly malfunctionSteering wheel pad (D squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−271)
DI5Q9−03
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W02055
R14286 R12688H00016
Airbag Sensor
Assembly
Spiral
Cable
P Squib
D Squib D+
D−
D−
D+
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−261
1996 LAND CRUISER (RM451U)
2 Check D squib circuit.
PREPARATION:
Using service wire, connect D+ and D− on airbag sensor assem-
bly connector.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance between
D
+ and D−.
OK:
Resistance: Below 1 Ω
NG Go to step 5.
OK
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R05895
AB0118
R13006AB0069
AB0119
W02044
H00017
Airbag
Sensor
Assembly
Spiral
Cable
D Squib P Squib
D+
D− ACC
ON
or
DLC1
E1 Tc Code 14
DI−262
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect connector to airbag sensor assembly.
(b) Using a service wire, connect D+ and D− on spiral cable
side of connector between spiral cable and steering
wheel pad.
(c) Connect negative ( −) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory. (See page DI−240 )
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843−18020
(f) Check DTC.
OK:
DTC 14 is not output.
HINT:
Codes other than code 14 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK
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R05896
AB0118
R13006AB0119
W02044
H00018
Airbag Sensor
Assembly
Spiral
Cable
P Squib
D Squib
ACC ON
or
DLC1
E1 Tc Code 14
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−263
1996 LAND CRUISER (RM451U)
4 Check D squib.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative ( −) terminal cable from the battery,
and wait at least 90 seconds.
(c) Connect steering wheel pad (squib) connector.
(d) Connect negative ( −) terminal cable to battery, and wait
at least 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(b) Clear malfunction code stored in memory. (See page DI−240 )
(c) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(e) Using SST, connect terminals Tc and E1 of DLC1.
SST 09843−18020
(f) Check DTC.
OK:
DTC 14 is not output.
HINT:
Codes other than code 14 may be output at this time, but they
are not relevant to this check.
NG Replace steering wheel pad.
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.
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R05899
R14286H00019
P SquibD+
D− Airbag
Sensor
Assembly
Spiral
Cable
D Squib
W01932
R14286 R12688H00020
Airbag
Sensor
Assembly
Spiral
Cable
P Squib
D Squib D−
D+
D+
D−
DI−264
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
5 Check spiral cable.
PREPARATION:
Disconnect connector between airbag sensor assembly and
spiral cable.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance D
+ and
D
−.
OK:
Resistance: Below 1 Ω
NG Repair or replace spiral cable.
OK
6 Check harness between airbag sensor assembly and spiral cable.
PREPARATION:
Using service wire, connect D+ and D− on airbag sensor assem-
bly connector.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and spiral cable, measure
the resistance between D
+ and D−.
OK:
Resistance: Below 1 Ω
NG Repair or replace harness or connector be- tween airbag sensor assembly and spiral cable.
OK
From the results of the above inspection, the malfunctioning part can no\
w be considered normal.
To make sure of this, use the simulation method to check.
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R14285 AB0119H00021
Airbag Sensor Assembly
ON
IG2
ACC
(+)
(−)
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−265
1996 LAND CRUISER (RM451U)
DTC 31 Airbag Sensor Assembly Malfunction
CIRCUIT DESCRIPTION
The airbag sensor assembly consists of a airbag sensor, safing sensor, drive circuit, diagnosis circuit and
ignition control, etc.
It receives signals from the airbag sensors, judges whether or not the SRS must be activated, and diagnosis
system malfunction.
DTC 31 is recorded when occurrence of a malfunction in the airbag sensor\
assembly is detected.
DTC No.DTC Detection ConditionTrouble Area
31 Airbag sensor assembly malfunctionAirbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code 31 is displayed at the same time, fi\
rst repair the malfunction indi-
cated by the malfunction code other than code 31.
1 Preparation (See step 1 on page DI−271).
2 Check voltage at IG2 and ACC of airbag sensor assembly.
PREPARATION:
Turn ignition switch ON.
CHECK:
Measure voltage between terminals IG2 and ACC of airbag
sensor assembly and body ground.
OK:
Voltage: Below 16 V
NG Check battery and charging system (See page CH−2).
OK
DI5QA−03
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AB0118
R13006AB0119
FI1394
H00022
ACCON
or
DLC1
E1 Tc Code 31
DI−266
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
3 Is DTC 31 output again?
PREPARATION:
Clear malfunction code.
CHECK:
(a) Turn ignition switch to LOCK, and wait at least 20 se-
conds.
(b) Turn ignition switch to ACC or ON, and wait at least 20 se-
conds.
(c) Repeat operation in step (a) and (b) at least 5 times.
(d) Using SST, connect terminals Tc and E1 of DLC 1. SST 09843−18020
(e) Check the DTC.
NO Using simulation method, reproduce malfunc- tion symptoms (See page IN−18 ).
YES
Replace airbag sensor assembly.
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R15195
Airbag Sensor
Assembly
1 2 12
B−R
W−R
P
+
P−
P Squib
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−267
1996 LAND CRUISER (RM451U)
DTC 54 Open in P Squib Circuit
CIRCUIT DESCRIPTION
The P squib circuit consists of the airbag sensor assembly and front passen\
ger airbag assembly.
It causes the airbag to deploy when the airbag deployment conditions are\
satisfied.
For details of the function of each component, see FUNCTION OF COMPONENT\
S on page RS−2.
DTC 54 is recorded when an open is detected in the P squib circuit.
DTC No.DTC Detection ConditionTrouble Area
54
 Open circuit in P+ wire harness or P− wire harness of
squib
 Squib malfunction
 Airbag sensor assembly malfunctionFront passenger airbag assembly (P squib)
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
DI5QB−03
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