1999 TOYOTA AVENSIS Supplement

H01454
Curtain Shield Airbag
Squib (LH)Airbag Sensor Assembly
1 2
Y–P8
C5
ICL+ Y–GR7
C5ICL–
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–21
DTC 85 Short in Curtain Shield Airbag Squib (LH)
Circuit (to Ground)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (LH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (LH).
It causes the curtain shield airbag assembly (LH) to activate when the curtain shield airbag assembly (LH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 85 is recorded when ground short is detected in the curtain shield airbag squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
85

Short circuit in curtain shield airbag squib (LH) wire har-
ness (to ground)

Curtain shield airbag squib (LH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
DI69B–01


H11667
Curtain
Shield
Airbag
Squib (LH)Airbag
Sensor
Assembly
ICL+
(+) (–)Airbag Sensor
Assembly
ICL–
DI–22
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (LH) circuit.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the curtain shield airbag assembly (LH) and airbag sen-
sor assembly, measure the resistance between ICL+, ICL– and
body ground.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (LH) and
airbag sensor assembly.
OK

   







H11668
Airbag
Sensor
Assembly
DTC 85
→ ←
Tc Check ConnectorCurtain
Shield
Airbag
Squib (LH)
E1
ICR+ICR–ACC
orON
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–23
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect ICR– and ICR+ of the con-
nector (on the curtain shield airbag assembly side) be-
tween the curtain shield airbag assembly (LH) and airbag
sensor assembly.
(c) Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
(See step 5 on page DI–153 of Pub. No. RM599E)
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(e) Check DTC.
(See page DI–152 of Pub. No. RM599E)
OK:
DTC 85 is not output.
HINT:
Codes other than code 85 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK

  




H11669
→←
E1 TcACC ON
orAirbag
Sensor
Assembly
DTC 85 Check Connector Curtain
Shield
Airbag
Squib (LH)
DI–24
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
4 Check curtain shield airbag squib (LH).
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the curtain shield airbag assembly (LH) connec-
tor.
(d) Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
(See step 5 on page DI–153 of Pub. No. RM599E)
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(e) Check DTC.
(See page DI–152 of Pub. No. RM599E)
OK:
DTC 85 is not output.
HINT:
Codes other than code 85 may be output at this time, but they
are not relevant to this check.
NG Replace curtain shield airbag assembly (LH).
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.



H12070
Airbag
Sensor
Assembly Curtain
Shield
Airbag
Squib (LH)
ICL+
(–)(+) ONAirbag Sensor
Assembly
ICL–
V
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–25
DTC 86 Short in Curtain Shield Airbag Squib (LH)
Circuit (to B+)
CIRCUIT DESCRIPTION
The curtain shield airbag squib (LH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (LH).
It causes the curtain shield airbag assembly (LH) to activate when the curtain shield airbag assembly (LH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 86 is recorded when the B+ short is detected in the curtain shield airbag squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
86

Short circuit in curtain shield airbag assembly (LH) wire
harness (to B+)

Curtain shield airbag squib (LH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–21.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (LH) circuit.
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the curtain shield airbag assembly
side) between the curtain shield airbag assembly (LH)
and airbag sensor assembly, measure the voltage be-
tween ICL+, ICL– and body ground.
OK:
Voltage: 1 V or less
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (LH) and
airbag sensor assembly.
OK
DI69C–01

   







H11827
Airbag
Sensor
Assembly
DTC 86
→ ←
E1
Tc Check ConnectorCurtain
Shield
Airbag
Squib (LH)
ICL+ICL–ACC
orON
DI–26
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
3 Check airbag sensor assembly.
PREPARATION:
(a) Connect the connector to the airbag sensor assembly.
(b) Using a service wire, connect ICL+ and ICL– of the con-
nector (on the curtain shield airbag assembly side) be-
tween the curtain shield airbag assembly (LH) and airbag
sensor assembly.
(c) Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
(See step 5 on page DI–153 of Pub. No. RM599E)
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(e) Check DTC.
(See page DI–152 of Pub. No. RM599E)
OK:
DTC 86 is not output.
HINT:
Codes other than code 86 may be output at this time, but they
are not relevant to this check.
NG Replace airbag sensor assembly.
OK

  




H11828
→←
E1Tc ACC ON
orAirbag
Sensor
Assembly
DTC 86 Check ConnectorCurtain
Shield
Airbag
Squib (LH)
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI–27
4 Check curtain shield airbag squib (LH).
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (–) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Connect the curtain shield airbag assembly (LH) connec-
tor.
(d) Connect negative (–) terminal cable to the battery, and
wait at least for 2 seconds.
CHECK:
(a) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(b) Clear DTC stored in memory.
(See step 5 on page DI–153 of Pub. No. RM599E)
(c) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(d) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(e) Check DTC.
(See page DI–152 of Pub. No. RM599E)
OK:
DTC 86 is not output.
HINT:
Codes other than code 86 may be output at this time, but they
are not relevant to this check.
NG Replace curtain shield airbag assembly (LH).
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.


H11826
Airbag
Sensor
Assembly Curtain
Shield
Airbag
Squib (LH)
ICL+
(–)(+)Airbag Sensor
Assembly
ICL–
DI–28
– DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC 87 Short in Curtain Shield Airbag Squib (LH)
Circuit
CIRCUIT DESCRIPTION
The curtain shield airbag squib (LH) circuit consists of the airbag sensor assembly and curtain shield airbag
assembly (LH).
It causes the curtain shield airbag assembly (LH) to activate when the curtain shield airbag assembly (LH)
activation conditions are satisfied.
For details of the function of each component, see OPERATION on page RS–2.
DTC 87 is recorded when a short is detected in the curtain shield airbag squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
87

Short circuit between ICL+ wire harness and ICL– wire
harness of squib

Curtain shield airbag squib (LH) malfunction

Airbag sensor assembly malfunction
Curtain shield airbag assembly (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI–21.
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI–285 of Pub. No. RM599E)
2 Check curtain shield airbag squib (LH) circuit.
PREPARATION:
Release airbag activation prevention mechanism of the con-
nector (on the airbag sensor assembly side) between the airbag
sensor assembly and curtain shield airbag assembly (LH).
(See page DI–1)
CHECK:
For the connector (on the curtain shield airbag assembly side)
between the curtain shield airbag assembly (LH) and airbag
sensor assembly, measure the resistance between ICL+ and
ICL–.
OK:
Resistance: 1 MΩ or Higher
NG Repair or replace harness or connector be-
tween curtain shield airbag assembly (LH) and
airbag sensor assembly.
DI69D–01