TOYOTA CAMRY 1999 Service Repair Manual

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±779
1014 Author: Date:
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±780
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1015 Author: Date:
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.

H03352H09519H09521H09522
Airbag
Sensor
Assembly Front Airbag
Sensor (RH)
(+) SR+
(±)SR±
Engine Room Main
Wire Harness
SR+
SR±
u "
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±781
1016 Author: Date:
11 Check engine room main wire harness.
PREPARATION:
(a) Disconnect the engine room main wire harness connector
on the airbag sensor assembly side.
(b) Using a service wire, connect SR+ and SR± of the con-
nector (on the engine room main wire harness side) be-
tween the engine room main wire harness and the front
airbag sensor (RH).
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: Below 1 W
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.

H02751
Airbag Sensor Assembly Front Airbag Sensor (LH)
SL+
SL± C1815
26 2
1 SL+W±R
BR
SL± C18 DI±782
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1017 Author: Date:
DTC B1158/B1159/16 Front Airbag Sensor (LH) Malfunction
CIRCUIT DESCRIPTION
The front airbag sensor (LH) circuit consists of the airbag sensor assembly and front airbag sensor (LH).
For details of the function of each component, see OPERATION on page RS±2.
DTC B1158/B1159/16 is recorded when malfunction is detected in the front airbag sensor (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B1158/B1159/16
Front airbag sensor (LH) malfunction

Front airbag sensor (LH)

Wire harness

Airbag sensor assembly
WIRING DIAGRAM
DI4LB±01

H01370AB0119H08065H08066
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+)SL+
(±)
SL± Airbag Sensor
Assembly
ON
H08399H01370
H08400
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+)SL+
(±)
SL± Airbag Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±783
1018 Author: Date:
INSPECTION PROCEDURE
1 Prepare for inspection. (See step 1 on page DI±787)
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 (LH) and the airbag sen-
sor assembly, measure the voltage between body ground
and each of SL+ and SL±.
OK:
Voltage: Below 1 V
NG Repair or replace harness or connector be-
tween front airbag sensor (LH) and airbag sen-
sor assembly.
OK
3 Check wire harness (to ground).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (LH) and the airbag sensor as-
sembly, measure the resistance between body ground and
each of SL+ and SL±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween front airbag sensor (LH) and airbag sen-
sor assembly.
OK

H01370H08058H09524
Airbag
Sensor
Assembly Front Airbag
Sensor (LH)
(+)SL+
(±)
SL± Airbag Sensor
Assembly
H09526H09521H08058H09525
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
(+)SL+ Airbag Sensor
Assembly
(±)
SL± SL+SL±
DI±784
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1019 Author: Date:
4 Check wire harness.
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (LH) and the airbag sensor as-
sembly, measure the resistance between SL+ and SL±.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween front airbag sensor (LH) and airbag sen-
sor assembly.
OK
5 Check wire harness.
PREPARATION:
Using a service wire, connect SL+ and SL± of the connector (on
the front airbag sensor (LH) side) between the airbag sensor
assembly and the front airbag sensor (LH).
CHECK:
For the connector (on the airbag sensor assembly side) be-
tween the front airbag sensor (LH) and the airbag sensor as-
sembly, measure the resistance between SL+ and SL±.
OK:
Resistance: Below 1 W
NG Repair or replace harness or connector be-
tween front airbag sensor (LH) and airbag sen-
sor assembly.
OK

H01009H01371H01155
Airbag
Sensor
Assembly
Front Airbag
Sensor (LH)
(+) SL+
(±)SL±
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±785
1020 Author: Date:
6 Check front airbag sensor (LH).
CHECK:
For the connector (on the front airbag sensor (LH)), measure
the resistance between SL+ and SL±.
OK:
Resistance: 300 ± 1500 W
NG Replace front airbag sensor (LH).
OK

AB0118
R13006AB0119H01064
H01369
H01154
Front Airbag
Sensor (LH)
Airbag
Sensor
Assembly
ON
or
DTC B1158/B1159/16 ACC
DLC1
E1
Tc
"u "u
DI±786
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1021 Author: Date:
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 (LH) 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 page DI±626)
(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±626)
OK:
DTC B1158/B1159/16 is not output.
HINT:
Codes other than code B1158/B1159/16 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.

H02288
15A CIG
L±R 2Airbag Sensor
Assembly 2
3 4
6 7
6
3B±R
65A IGN
C18 1K
IG 1K
1N1N
C18 Instrument Panel J/B
30A AM2
W±R W±R1
4 40A AM1
2L
1K2A
1B
1K1B
55 W2
1
2 Instrument Panel J/B
AF9 F4F6 FL MAIN
B±G
100A
ALT
Instrument Panel J/B Junction
Connector
W±B7
1J 1NW±BC18
1 Battery
1 1
2
5
B±O
GR
ACCIG2 Fusible Link Block
27
E1 Ignition Switch1 B±RB
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±787
1022 Author: Date:
DTC Normal Source Voltage Drop
CIRCUIT DESCRIPTION
The SRS is equipped with a voltage±increase circuit (DC±DC converter) in the airbag sensor assembly in
case the source voltage drops.
When the battery voltage drops, the voltage±increase circuit (DC±DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different from other circuits that is when the SRS
warning light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assembly, and the source voltage returns to
normal, the SRS warning light automatically goes off.
DTC No.Diagnosis
(Normal)Source voltage drop
WIRING DIAGRAM
DI1BN±08

H01026H06508H06509
LOCK
Airbag Sensor
Assembly
P Squib
D Squib
P/T Squib (LH)
Side Squib (LH)
P/T Squib (RH)
Side Squib (RH)Spiral
Cable
Side Airbag
Sensor (LH)
Side Airbag
Sensor (RH) Front Airbag
Sensor (LH) Front Airbag
Sensor (RH)
DI±788
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
1023 Author: Date:
INSPECTION PROCEDURE
1 Prepare for inspection.
PREPARATION:
(a) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(b) Remove the steering wheel pad. (See page SR±11)
(c) Disconnect the connector of the front passenger airbag
assembly. (See page RS±28)
(d) Disconnect the connector of the side airbag assembly RH
and LH. (See page RS±40 and RS±52)
(e) Disconnect the connector of the seat belt pretensioner
RH and LH. (See page BO±126)
(f) Disconnect the connectors of the airbag sensor assem-
bly.
(See page RS±59)
(g) Disconnect the connector of the front airbag sensor LH
and RH. (See page RS±64)
(h) Disconnect the connector of the side airbag sensor as-
sembly RH and LH. (See page RS±69)
CAUTION:
Store the steering wheel pad with the front surface facing
upward.