1999 TOYOTA CAMRY ignition

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

AB0117H01293H01295
Airbag Sensor Assembly
LOCK
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±309
INSPECTION PROCEDURE
Always lit up, when ignition switch is in LOCK position
1 Prepare for inspection. (See step 1 on page DI±305)
2 Does SRS warning light turn off?
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
(d) Connect negative (±) terminal cable to the battery.
CHECK:
Check operation of SRS warning light.
NO Check SRS warning light circuit or terminal AB
circuit of DLC1.
YES
Replace airbag sensor assembly.

N14677
Fuse
AB0119H01300
H01301
Airbag Sensor Assembly
ON
LA
(+)
(±)
DI±310
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
Does not light up, when ignition switch is turned to ACC or ON
1 Check ECU±B Fuse.
PREPARATION:
Remove ECU±B fuse.
CHECK:
Check continuity of ECU±B fuse.
OK:
Continuity
HINT:

Fuse may be burnt out even if it appears to be OK during
visual inspection.

If fuse is OK, install it.
NG Go to step 5.
OK
2 Prepare for inspection. (See step 1 on page DI±305)
3 Check SRS warning light circuit.
PREPARATION:
(a) Connect negative (±) terminal cable to the battery.
(b) Turn ignition switch to ACC or ON.
CHECK:
Measure the voltage LA terminal of the harness side connector
of the airbag sensor assembly.
OK:
Voltage: 10 ± 14 V
NG Check SRS warning light bulb or repair SRS
warning light circuit.
OK

H02755AB0119H10313H10308
ON P/T Squib (LH)
Front Airbag
Sensor (RH)Spiral
Cable
P/T Squib (RH) Front Airbag
Sensor (LH)
P Squib D SquibAirbag Sensor
Assembly
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±311
4 Does SRS warning light come on?
PREPARATION:
(a) Disconnect negative (±) terminal cable from the battery.
(b) Connect the airbag sensor assembly connector.
(c) Connect negative (±) terminal cable to the battery, and
wait at least for 2 seconds.
(d) Turn ignition switch to ACC or ON.
CHECK:
Check operation of SRS warning light.
NO Check terminal LA of airbag sensor assembly.
If normal, replace airbag sensor assembly.
YES
From the results of the above inspection, the malfunctioning part can now be considered normal.
To make sure of this, use simulation method to check.

AB0117AB0118AB0119H10313H10315
LOCK ACC
ON
or
AB0118
R14305AB0119
H00030
ACCON
or
E1
Tc
(+) (±)
DI±314
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
INSPECTION PROCEDURE
If the DTC is not displayed, do the following troubleshooting.
1 Does SRS warning light up for approx. 6 seconds?
PREPARATION:
Check operation of the SRS warning light after ignition switch
is turned from LOCK position to ACC or ON position.
NO Check SRS warning light system.
(See page DI±223)
YES
2 Check voltage between terminals Tc and E1 of DLC1.
PREPARATION:
Turn ignition switch to ACC or ON.
CHECK:
Measure the voltage between terminals Tc and E1 of DLC1.
OK:
Voltage: 10 ± 14 V
OK Go to step 4.
NG

AB0118
R14304AB0119
H00031
ACCON
orTc
(+)
(±)
AB0117 AB0118 AB0119H01302H01303
LOCK
ACCON
or
Airbag Sensor Assembly
Tc
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±315
3 Check voltage between terminal Tc of DLC1 and body ground.
CHECK:
Measure the voltage between terminal Tc of DLC1 and body
ground.
OK:
Voltage: 10 ± 14 V
OK Check harness between terminal E1 of DLC1
and body ground.
NG
4 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) Disconnect the airbag sensor assembly connector.
(d) Insert service wire into terminal Tc from back side as
shown in the illustration.
(e) Connect the airbag sensor assembly connector with ser-
vice wire.
(f) Connect negative (±) terminal cable to the battery.
(g) Turn ignition switch to ACC or ON and wait at least for 20
seconds.
(h) Connect service wire of terminal Tc to body ground.
CHECK:
Check operation of SRS warning light.
OK:
SRS waning light comes on.
NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
OK Check harness between the airbag sensor as-
sembly and DLC1.
NG
Replace airbag sensor assembly.

AB0119H01304H01305
LOCKAirbag Sensor Assembly
Tc
(+)
(±)
DI±316
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
If the DTC is displayed without a DTC check procedure, perform the following
troubleshooting.
1 Check resistance between terminal Tc of airbag sensor assembly and body
ground.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of the airbag sensor as-
sembly connector and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.

I00279CRUISE MAIN Indicator Light
DI1KS±04
BE4034
Indicator light
1.5 sec.0.5 sec.
ON
OFF
I00169
DLC2
Tc E 1
± DIAGNOSTICSCRUISE CONTROL SYSTEM
DI±319
PRE±CHECK
1. DIAGNOSIS SYSTEM
(a) Check the indicator.
(1) Turn the ignition switch ON.
(2) Check that the CRUISE MAIN indicator light comes
ON when the cruise control main switch is turned
ON, and that the indicator light goes OFF when the
main switch is turned OFF.
HINT:
If the indicator check result is not normal, proceed to trouble-
shooting (See page BE±1) for the combination meter section.
(b) Check the DTC.
HINT:
If a malfunction occurs in the No. 1 vehicle speed sensor or ac-
tuator, etc. during cruise control driving, the ECU actuates
AUTO CANCEL of the cruise control and turns on and off the
CRUISE MAIN indicator light to inform the driver of a malfunc-
tion. At the same time, the malfunction is stored in memory as
a DTC.
(c) Output of DTC using diagnosis check wire.
(1) Turn the ignition switch ON.
(2) Using SST, connect terminals Tc and E
1 of DLC2.
SST 09843±18020
(3) Read the DTC on the CRUISE MAIN indicator light.