TOYOTA CAMRY 1999 Service Repair Manual

AB0118
R13006AB0119H01018
H01085H01222
"u
E1TcACC ON
or Airbag
Sensor
Assembly P/T Squib (LH)
DTC B0138/72 DLC1
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±289
4 Check P/T 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 seat belt pretensioner (LH) connector.
(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±223).
(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±223).
OK:
DTC B0138/72 is not output.
HINT:
Codes other than code B0138/72 may be output at this time, but
they are not relevant to this check.
NG Replace seat belt pretensioner (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.

AB0119H01298H01299
(±) (+)ONAirbag Sensor Assembly
ACC
IG2
DI±290
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC B1100/31 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 sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assembly is detected.
DTC No.DTC Detecting ConditionTrouble Area
B1100/31
Airbag sensor assembly malfunction
Airbag sensor assembly
INSPECTION PROCEDURE
HINT:
When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than code B1100/31.
1 Prepare for inspection. (See step 1 on page DI±305)
2 Check voltage at IG2 and ACC of airbag sensor assembly.
CHECK:
(a) Turn ignition switch to ON.
(b) Measure the voltage between body ground and terminals
each of IG2 and ACC of the airbag sensor assembly con-
nector.
OK:
Voltage: 10 ± 14 V
NG Check that an abnormality occurs on the battery
and charging system.
OK
DI1BM±27

AB0118
R13006AB0119
FI1394
H00022
ACCON
or
DLC1
E1
TcDTC B1100/31
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±291
3 Is DTC B1100/31 output again?
PREPARATION:
Clear DTC.
(See step 5 on page DI±223)
CHECK:
(a) Turn ignition switch to LOCK, and wait at least for 20 se-
conds.
(b) Turn ignition switch to ACC or ON, and wait at least for 20
seconds.
(c) Repeat operation in step (a) and (b) at least 5 times.
(d) Check DTC. (See page DI±223)
HINT:
Codes other than code B1100/31 may be output at this time, but
they are not relevant to this check.
NO Using simulation method, reproduce malfunc-
tion symptoms. (See page IN±19)
YES
Replace airbag sensor assembly.

H02750
Airbag Sensor Assembly
Front Airbag Sensor (RH)
SR+
SR± C5
C59
20 B±W
BR±W II1 2
1 B±W
BR±W 2
1 SR+
SR±
II1 DI±292
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC B1156/B1157/15 Front Airbag Sensor (RH) Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor (RH) circuit consists of the airbag sensor assembly and front airbag sensor (RH).
For details of the function of each component, see Pub. No. RM654U on page RS±2.
DTC B1156/B1157/15 is recorded when malfunction is detected in the front airbag sensor (RH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1156/B1157/15
Front airbag sensor (RH) malfunction

Front airbag sensor (RH)

Wire harness

Engine room main wire harness

Airbag sensor assembly
WIRING DIAGRAM
DI4LA±04

H03363
H03355AB0119H03445
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)SR+
(±)
SR± Airbag Sensor
Assembly
ON
H03361H03353H03443
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(+)SR+
(±)
SR± Airbag Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±293
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±305).
2 Check wire harness (to B+).
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the airbag sensor assembly side)
between the front airbag sensor (RH) and the airbag sen-
sor assembly, measure the voltage between body ground
and each of SR+ and SR±.
OK:
Voltage: Below 1 V
NG Go to step 8.
OK
3 Check wire harness (to ground).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between body ground and
each of SR+ and SR±.
OK:
Resistance: 1 MW or Higher
NG Go to step 9.
OK

H03355H03356H09518
Airbag
Sensor
Assembly Front Airbag
Sensor (RH)
(+)SR+
(±)
SR± Airbag Sensor
Assembly
H03353H09521H03356H09523
Front Airbag
Sensor (RH)
Airbag
Sensor
Assembly
(+)SR+ Airbag Sensor
Assembly
(±)
SR± SR+SR±
DI±294
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
4 Check wire harness.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between SR+ and SR±.
OK:
Resistance: 1 MW or Higher
NG Go to step 10.
OK
5 Check wire harness.
PREPARATION:
Using a service wire, connect SR+ and SR± of the connector
(on the front airbag sensor (RH) side) between the airbag sen-
sor assembly and the front airbag sensor (RH).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (RH) and the airbag sensor as-
sembly, measure the resistance between SR+ and SR±.
OK:
Resistance: Below 1 W
NG Go to step 11.
OK

H04504H01062H08346
Airbag
Sensor
Assembly Front Airbag
Sensor (RH)
(+) SR+
(±)SR±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±295
6 Check front airbag sensor (RH).
CHECK:
For the connector (on the front airbag sensor (RH)), measure
the resistance between SR+ and SR±.
OK:
Resistance: 300 ± 1500 W
NG Replace front airbag sensor (RH).
OK

H02757AB0118AB0119R13006H01063H04014
Front Airbag
Sensor (RH)
Airbag
Sensor
Assembly
ON
or
DTC B1156/B1157/15 ACC
DLC1
E1
Tc
"u "u
DI±296
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
7 Check airbag sensor assembly.
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 front airbag sensor (RH) connector and air-
bag sensor assembly connector.
(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±223).
(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±223).
OK:
DTC B1156/B1157/15 is not output.
HINT:
Codes other than code B1156/B1157/15 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.

H03354
H06141AB0119H08272
Airbag
Sensor
Assembly Front Airbag
Sensor (RH)
(+)
SR+
(±)
SR±
ON
Engine Room Main
Wire Harness
u"
H03354H06140H08258
Airbag
Sensor
Assembly Front Airbag
Sensor (RH)
(+)SR+
(±)SR± Engine Room Main
Wire Harness
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±297
8 Check engine room main wire harness (to B+).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the RH front door wire harness
side) between the airbag sensor assembly and the en-
gine room main wire harness, measure the voltage be-
tween body ground and each of SR+ and SR±.
OK:
Voltage: Below 1 V
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.
9 Check engine room main wire harness (to ground).
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between body ground
and each of SR+ and SR±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.

H03354H09519H09520
Airbag
Sensor
Assembly
Front Airbag
Sensor (RH)
(±) SR+SR±
Engine Room Main
Wire Harness
(+)
u "
DI±298
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
10 Check engine room main wire harness.
PREPARATION:
Disconnect the engine room main wire harness connector on
the airbag sensor assembly side.
CHECK:
For the connector (on the engine room main wire harness side)
between the airbag sensor assembly and the engine room main
wire harness, measure the resistance between SR+ and SR±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace engine room main wire har-
ness.
OK
Repair or replace harness or connector between airbag sensor assembly and engine room main
wire harness.