TOYOTA LAND CRUISER 1996 J80 Workshop Manual

R05901
R14290H00004
Airbag Sensor
Assembly
P Squib
D Squib Spiral
Cable
D+
D−
DI−248
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−271)
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the resistance between
D
+, D− and body ground.
OK:
Resistance: 1 MΩ or Higher
NG Go to step 7.
OK
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R05896 R14291H00005
Spiral
CableAirbag Sensor
Assembly
P Squib
D Squib P+
P−
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−249
1996 LAND CRUISER (RM451U)
3 Check P squib circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the airbag sensor assembly and front passenger airbag
assembly, measure the resistance between P
+, P− and body
ground.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace harness or connector be- tween the airbag sensor assembly and front
passenger airbag assembly.
OK
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AB0069
W01933
AB0118
R13006AB0069
AB0118
W02042
H00006
Airbag Sensor
Assembly
Spiral
Cable
P Squib
D Squib P+
P−
D+
D− ACC
ON
or
Code 11
DLC1
Tc
E1
DI−250
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
4 Check airbag sensor assembly.
PREPARATION:
(a) Connect connector to airbag sensor assembly.
(b) Using service wire, connect D
+ and D− on spiral cable side
of connector between spiral cable and steering wheel
pad.
(c) Using a service wire, connect P
+ and P− on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(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 11 is not output.
HINT:
Codes other than code 11 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
W02042
H00007
Spiral
Cable
P Squib
D Squib
ACC ON
or
DLC1 Code 11
E1 Tc Airbag
Sensor
Assembly
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−251
1996 LAND CRUISER (RM451U)
5 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 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 11 is not output.
HINT:
Codes other than code 11 may be output at this time, but they
are not relevant to this check.
NG Replace steering wheel pad.
OK
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R05897
AB0118
R13006AB0119
W02042
H00008
Airbag
Sensor
Assembly
Spiral
Cable
P Squib
D Squib ACC ON
or
DLC1
E1 Tc Code 11
DI−252
−
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 11 is not output.
HINT:
Codes other than code 11 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
R14301H00009
Airbag Sensor
Assembly
Spiral
Cable
P Squib
D Squib D+
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−253
1996 LAND CRUISER (RM451U)
7 Check spiral cable.
PREPARATION:
Disconnect connector between airbag sensor assembly and
spiral cable.
CHECK:
Measure resistance between D+ on spiral cable side of connec-
tor between spiral cable and steering wheel pad and body
ground.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace spiral cable.
OK
Repair or replace harness or connector be-
tween airbag sensor assembly and spiral
cable.
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AB0119
W01931
R14300
H00010
Airbag Sensor
Assembly
Spiral
Cable
ON
P Squib
D Squib D+
D−
(+)
(−)
DI−254
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
DTC 12 Short in Squib Circuit (to B+)
CIRCUIT DESCRIPTION
The squib circuit consists of the airbag sensor assembly, spiral cable, steering wheel pad and front passen-
ger airbag assembly. It causes the SRS to deploy when the SRS deployment conditions are sat\
isfied.
For details of the function of each component, see page FUNCTION OF COMP\
ONENTS on page RS−2.
DTC 12 is recorded when a B+ short is detected in the squib circuit.
DTC No.DTC Detection ConditionTrouble Area
12
 Short circuit in squib wire harness (to B+)
 Squib malfunction
 Spiral cable malfunction
 Airbag sensor assembly malfunctionSteering wheel pad (D squib)
 Front passenger airbag assembly (P squib)
 Spiral cable
 Airbag sensor assembly
 Wire harness
WIRING DIAGRAM
Refer to page DI−247 for the WIRING DIAGRAM.
INSPECTION PROCEDURE
1 Preparation. (See step 1 on page DI−271)
2 Check D squib circuit.
CHECK:
For the connector (on the spiral cable side) between the spiral
cable and steering wheel pad, measure the voltage between
D
+, D− and body ground.
OK:
Voltage: 0 V
NG Go to step 7.
OK
DI5Q8−03
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R05898 AB0119
R14300H00011
ONP+
P−
(+)
(−)
Airbag Sensor
Assembly
P Squib
D Squib Spiral
Cable
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−255
1996 LAND CRUISER (RM451U)
3 Check P squib circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween airbag sensor assembly and front passenger airbag as-
sembly, measure the voltage between P
+, P− and body ground.
OK:
Voltage: 0 V
NG Repair or replace harness or connector be- tween the airbag sensor assembly and front
passenger airbag assembly.
OK
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AB0069
AB0069
AB0118
R13006AB0119W01933
W02043 H00012
Airbag Sensor
Assembly
P+
P−
Spiral
Cable
P Squib
D Squib D− D+ ACC ON
or
DLC1 Code 12
E1 Tc
DI−256
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
1996 LAND CRUISER (RM451U)
4 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) Using a service wire, connect P
+ and P− on airbag sensor
assembly side of connector between airbag sensor as-
sembly and front passenger airbag assembly.
(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 airbag sensor assembly.
OK
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R13006 R05896
AB0118 AB0019W02043H00013
Airbag
Sensor
Assembly
P Squib
D Squib Spiral
Cable
ACC ON
or
DLC1 Code 12
E1 Tc
−
DIAGNOSTICS SUPPLEMENTAL RESTRAINT SYSTEM
DI−257
1996 LAND CRUISER (RM451U)
5 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 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 steering wheel pad.
OK
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