1999 TOYOTA CAMRY diagram

H01016H02141H02213
P/T Squib (LH)Airbag
Sensor
Assembly
PL+
PL±
(+)(±)
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±281
DTC B0136/74 Open in P/T Squib (LH) Circuit
CIRCUIT DESCRIPTION
The P/T squib circuit (LH) consists of the airbag sensor assembly and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see Pub. No. RM654U on page RS±2.
DTC B0136/74 is recorded when an open is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0136/74

Open circuit in PL+ wire harness or PL± wire harness of
squib

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±277.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±305).
2 Check P/T squib (LH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and PL±.
OK:
Resistance: Below 1 W
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI1BJ±21

H01016H08392H08396
P/T Squib (LH)
Airbag
Sensor
Assembly
PL+
(+)
(±)
DI±284
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DTC B0137/71 Short in P/T Squib (LH) Circuit
(to Ground)
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see Pub. No. RM654U on page RS±2.
DTC B0137/71 is recorded when a ground short is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0137/71

Short circuit in P/T squib (LH) wire harness (to ground)

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±277.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±305).
2 Check P/T squib (LH) circuit.
CHECK:
For the connector (on the seat belt pretensioner side) between
the seat belt pretensioner (LH) and the airbag sensor assembly,
measure the resistance between PL+ and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI1BK±16

H01016AB0119
H08394H08269
Airbag
Sensor
Assembly P/T Squib (LH)
PL+
(±) (+) ON
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±287
DTC B0138/72 Short in P/T Squib (LH) Circuit (to B+)
CIRCUIT DESCRIPTION
The P/T squib (LH) circuit consists of the airbag sensor assembly and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
For details of the function of each component, see Pub. No. RM654U on page RS±2.
DTC B0138/72 is recorded when a B+ short is detected in the P/T squib (LH) circuit.
DTC No.DTC Detecting ConditionTrouble Area
B0138/72

Short circuit in seat belt pretensioner (LH) wire harness
(to B+)

P/T squib (LH) malfunction

Airbag sensor assembly malfunction
Seat belt pretensioner (LH)

Airbag sensor assembly

Wire harness
WIRING DIAGRAM
See page DI±277.
INSPECTION PROCEDURE
1 Prepare for inspection (See step 1 on page DI±305).
2 Check P/T squib (LH) circuit.
CHECK:
(a) Turn ignition switch to ON.
(b) For the connector (on the seat belt pretensioner side) be-
tween the seat belt pretensioner (LH) and the airbag sen-
sor assembly, measure the voltage between PL+ and
body ground.
OK:
Voltage: 0 V
NG Repair or replace harness or connector be-
tween seat belt pretensioner (LH) and airbag
sensor assembly.
OK
DI1BL±20

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

H02751
Airbag Sensor Assembly Front Airbag Sensor (LH)
SL+
SL± C515
26 2
1 SL+W±R
BR
SL±C5 DI±300
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
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 Pub. No. RM654U 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±03

H02288
15A CIG
L±R 2Airbag Sensor
Assembly 2
3 4
6 7
6
3B±R
65A IGN
C5 1K
IF 1K
1N1N
C5 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
AF14 F9F11 FL MAIN
B±G
100A
ALT
Instrument Panel J/B Junction
Connector
W±B7
1J 1NW±BC5
1 Battery
1 1
2
5
B±O
GR
ACCIG2 Fusible Link Block
27
E1 Ignition Switch1 B±RB
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±305
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±12

H02289
2 Airbag Sensor
Assembly
237
B±Y
12 IE2 LG
AB10A
ECU±B
Short Pin
W±R
1W Engine Room J/B No.2
11 B
A
A 3
LG
5DLC1 1 Battery
4 J2 Junction
Connector
1G2J 2A B±G
F9 F11 FL MAINFusible Link Block
1
1
TCP±B7Instrument Panel J/B
C5
B A LAW±R
LG
13
TC LG
LG±RIG3 LG±R11
B B
TC LG±R J2 Junction
Connector
19
DLC2 SRS Warning Light
IG3 C5 DI±308
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
SRS Warning Light Circuit Malfunction
CIRCUIT DESCRIPTION
The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ACC or ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and E1 of the DLC1 are connected, the DTC is displayed by blinking the SRS warning
light.
WIRING DIAGRAM
DI64R±01

H08301H10309
LG±R P±B
B
BJ2 Junction
ConnectorAirbag Sensor
Assembly
C519
Tc
11
LG±R 11
Tc
E1DLC1
3 BR
A
BR
ECEC BR A
Junction
Connector
6
J6B
J7 C
BR 3
E1Tc DLC2 LG±R
4
B IG3
IG3
BR
J20
Junction Connector
A A BR J20
Junction Connector
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±313
Tc Terminal Circuit
CIRCUIT DESCRIPTION
By connecting terminals Tc and E1 of the DLC1 the airbag sensor assembly is set in the DTC output mode.
The DTCs are displayed by blinking the SRS warning light.
WIRING DIAGRAM
DI1BQ±12