1999 TOYOTA CAMRY warning light

SRS
NOTICE: When inspecting or repairing the SRS, perform the operation in accordance with the following precautionary
instructions and the procedure and precautions in the Repair Manual for the applicable model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started after 90 seconds from when the ignition switch is turned to the ºLOCKº position and the
negative (±) terminal cable is disconnected from the battery.
(The SRS is equipped with a back±up power source so that if work is started within 90 seconds from
disconnecting the negative (±) terminal cable of the battery, the SRS may be deployed.)

When the negative (±) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
canceled. So before starting work, make a record of the contents memorized in the audio memory system. When work is
finished, reset the audio systems as they were before and adjust the clock. To avoid erasing the memory in each
memory system, never use a back±up power supply from outside the vehicle.

Before repairs, remove the airbag sensor if shocks are likely to be applied to the sensor during repairs.

Do not expose the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner,
center airbag sensor assembly, front airbag sensor assembly or side airbag sensor assembly directly to hot air or
flames.

Even in cases of a minor collision where the SRS does not deploy, the steering wheel pad, front passenger airbag
assembly, side airbag assembly, seat belt pretensioner, center airbag sensor assembly, front airbag sensor assembly
and side airbag sensor assembly should be inspected.

Never use SRS parts from another vehicle. When replacing parts, replace them with new parts.

Never disassemble and repair the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt
pretensioner, center airbag sensor assembly, front airbag sensor assembly or side airbag sensor assembly in order to
reuse it.

If the steering wheel pad, front passenger airbag assembly, side airbag assembly, seat belt pretensioner, center airbag
sensor assembly, front airbag sensor assembly or side airbag sensor assembly has been dropped, or if there are
cracks, dents or other defects in the case, bracket or connector, replace them with new ones.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting the system's electrical circuits.

Information labels are attached to the periphery of the SRS components. Follow the instructions on the notices.

After work on the SRS is completed, perform the SRS warning light check.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.

C 12 C10 C9C7
2 1A 2A1
2 1C 2C1
2 1C 5C6 13 12
IG2 2
A AII3 7II311
C CA C
B B
II3 6
A A
EC B 12 B 3B19 511 3
1234
B
3 AB
B
4
7
A AB TC E1
E1 TC
SILP
L±Y
LG
GR
LG
LG±R
BR LG
LG±R B±Y
P±B
LG±R BR BR BR BRWY Y±B
W
BR
W±R
LG
PRETENSIONER
LH P2 4
SIDE AIRBAG
SQUIB RH S1 0
PRETENSIONER
RH P2 5 DATA LINK
CONNECTOR 1 D 1
JUNCTION
CONNECTOR J23 JUNCTION
CONNECTOR J 3
S RS WARNING
LIGHT
[COMB. METER] C 9
JUNCTION
CONNECTOR J 3
DATA LINK
CONNECTOR 3 D 5
DATA LINK
CONNECTOR 2 D 4
SIDE AIRBAG
SENSOR RH S 8
LG
C17
CENTER AIRBAG SENSOR ASSEMBLYB A, C18 C, C19
J 7
JUNCTION
CONNECTORB A, J 8
* 1 : TMC MA DE
* 2 : TMMK MADE
* 3 : W/ SIDE AIRBAG* 4 : TMMK MADE 1MZ±FE
* 5 : EXCEPT * 4
Y±R
(
*2 *3) Y±R
(
*2 *3)
Y± G
(
*2 *3) Y±G
(
*2 *3)
BW1 1BW12
Y±R
(
*1 *3)
Y±G
(
*1 *3)(
*3)
(
*3)
(
*3)
(
*3)
B± Y
(
*4)
P± B
(
*4) (
*5)
(
*5)
J22(
1MZ±FE)
(
5S±FE)
Y±B(
*1)
L±B(
*2)
Y

KEY REMINDER AND SEAT BELT WARNING
2 1
1
2 1
2 1 2J 12 1D2
1T 3
1M 51S71S4
1J 71M 3DD
1W 1
IGBL
R±W
R L±B W±B
R±G
R±Y R±Y
R±Y W±B W±B
W±B W±B
R±L R±LFROM POWER SOURCE SYSTEM (
SEE PAGE 50)
10A
GAU GE7. 5A
DOME
INTEGRATION RELAY SEAT BELT
WARNING LIGHT
[COMB. METER]JUNCTION
CONNECTOR
UNLOCK
WARNING S W
DOOR COURTESY
SW FRONT LHBUCKLE
SW LHBUCKLE
SW LH J 4
U 1
D12 B 7 B 6
(
*1)
(
W/ O POWER SE AT)
A
A
JUNCTION
CONNECTOR J40
(
W/O POWER SEAT)(
*1) (
*1) (
*1)
BQ1 3
A
JUNCTION
CONNECTOR J11971
8 6 5 10C 7
A 4
BUZZER* 1 : W/ POWER SEAT
BQ1 1 C C 8 A , C10

Current always flows to TERMINAL 1 of the integration relay through the DOME fuse.
1. SEAT BELT WARNING SYSTEM
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 7 of the integration relay. At the same
time, current flows to TERMINAL 9 of the relay from the GAUGE fuse through the seat belt warning light. This current
activates the relay and the current flowing through the warning light flows from TERMINAL 9 of the relay to TERMINAL 10 to
GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL 8 of the relay to TERMINAL 10
to GROUND, causing the warning light to light up. A buckle SW off signal is input to TERMINAL 8 of the relay, the current
flowing to TERMINAL 1 of the relay flows from TERMINAL 10 to GROUND and the seat belt warning buzzer sounds for
approx. 6 seconds. However, if the seat belt is put on during this period (While the buzzer is sounding), signal input to
TERMINAL 8 of the relay stops and the current flow from TERMINAL 1 of the relay to TERMINAL 10 to GROUND is cut,
causing the buzzer to stop.
2. KEY REMINDER SYSTEM
With the ignition key inserted in the key cylinder (Unlock warning SW on), the ignition SW still off and driver's door open
(Door courtesy SW on), when a signal is input to TERMINAL 6 of the integration relay, the relay operates, current flows from
TERMINAL 1 of the relay to TERMINAL 10 to GROUND and key reminder buzzer sounds.
B6, B7 BUCKLE SW LH
1±2 : Closed with driver's seat belt in use
D12 DOOR COURTESY SW FRONT LH
1±GROUND : Closed with front LH door open
U1 UNLOCK WARNING SW
1±2 : Closed with ignition key in cylinder
INTEGRATION RELAY [INSTRUMENT PANEL J/B]
10±GROUND : Always continuity
6±GROUND : Continuity with the driver's door open
5±GROUND : Continuity with the ignition key in cylinder
8±GROUND : Continuity with the driver's seat belt in use
1±GROUND : Always approx. 12 volts
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B632C10C30J1131
B734D1232J4032
C8A30J431U131
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1D20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1M20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1S20Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1T20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1W20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2J22Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
BQ146Floor Wire and Seat No.1 Wire (Under the Driver's Seat)
SYSTEM OUTLINE
SERVICE HINTS

5A
STARTER FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1J 3
IJ1 5IF2 5 IG2 5IG317 IG23
IK2 3 C 9B 2
B 5C10 A4C4C11 A3B7C3A5A12
EB 2 1 II2 11A B
B C
IG1 6
11
IG1 7
12 1
IG
R±Y
B±W
GR
B±O Y±B Y±B
O O
R±W
R±L
P±L
Y±G P±L P±L W±B
Y±G
R±W R±W R±W
R±W W±B
B±W
B±WB±W
B±O
R±W
R±W R±W
R±W PARK /NEUTRAL
POSITION SW P 1
OIL PRESSURE
SW O 1
PARKING
BRAKE SW P 3 CLUTCH START SW C 7
WASHER LEVEL
WARNING SW W 1
JUNCTION
CONNECTOR J 2
BRAKE FLUID
LEVEL WARNING SW B 2
JUNCTION
CONNECTOR J11L
LG
G± O
B5
B B6
2B B
BFROM THEFT
DETERRENT ECU SECURITY
OIL
CRUISE
SEAT BELT
ABS
WASHER LEVEL
REAR LIGHTS
BRAKE
BULB
CHECK
RELAY
TRAC OFF
SLIP
O/D OFF
(
A/T)
(
M/T) JUNCTION
CONNE CTOR J29
(
M/T) (
A/T)
P
N
(
*5)
(
*6) (
*3)
(
*4)
(
*4)PKB BRK
A
TO CRUISE
CONTROL ECU
TO INTEGRATION
RELAY
TO ABS ECU
TO ABS AND TRACTION ECU
TO ABS ACTUATOR AND ECU
TO LI GHT
FAI LURE
SENSORTO ABS AND
TRACTION
ECU
GR
(
A/T)
II2 10
GR
B±O
B±O(
*5 A/T)
(
*6 A/T)
TO O/D
MAIN SWJ 7
JUNCTION
CONNECTORB A, J 8
C 8
COMBINA TION METERB A, C 9 C, C10* 1 : 1 MZ± FE
* 2 : 5S±FE
* 3 : W/O DAYTIME RUNNING LIGHT
* 4 : W/ DAYTIME RUNNING LIGHT
* 5 : TMC MADE
* 6 : TMMK MADE
B 4(
*2) A 18(
*1)
A 8(
*1)
B 14(
*2)
B D 6 , A
DAY TIME RUNNING
LIGHT RELAY (
MAIN)

I GROUND POINT
FRONT TURN SIGNAL
LIGHT AND PARKING
LIGHT LH
FRONT TURN SIGNAL
LIGHT AND PARKING
LIGHT RH
ENGINE HOOD
COURTESY SW
RADIATOR FAN
MOTOR
WASHER LEVEL
WARNING SW
WATER TEMP. SW
NO. 1
FAN NO. 2 RELAYABS SOL RELAY
ABS AND
TRACTION
ECU (
GND2)
(
GND3)
(
GND1)
(
GND2)
FAN NO. 3 RELAY
HTR RELAY
DRL NO. 4 RELAY
ENGINE MAIN RELAY
EFI RELAY
FRONT WIPER MOTOR(
GND1)
ABS AND
TRACTION
ACTUATOR
ABS
ACTUATOR
AND ECU
ABS ACTUATOR
1
1
1
2EA12
E 4 E 4
E 4
E 4
E 4
E 4
E 4
E 4
E 4
2J 10
2F4
2C 5
EB3
E 1
E 1
E 1
E 1
E 1
EA W±B W±B W±B
W±B W±B W±B
W± B
W±B
W±B
W±B
W±BW±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W± B W±B W±B W± B W±B W±B W±B W±B
W±B
W± B W± B W±B W±B W±B
W± B
(
5S±FE)(
*1, *3)
(
*3)
(
*3)
(
*3)
(
*3)
(
*2 *4)
(
*2 *4)
(
*1)
(
*5)
W±B
W±B DAYTIME RUNNING
LIGHT RESISTORW±B
(
*5)
W±BE 1 2W±B
(
CALIFORNIA)A/F HTR RELAY
W±B
A/C DUAL PRESSURE
SW W±B
(
AUTOMATIC A/C)

I GROUND POINT
CRUISE CONTROL
ECU
TRACTI ON OFF SW
DATA LINK
CONNECTOR 3
POWER RELAY
INTEGRA TION RELAY
NOISE FILTER POWER WINDOW
MASTER SW AND
DOOR LOCK
CONTROL SW LHCRUISE CONTROL
ACTUATOR
CRUISE CONTROL S W
[COMB. SW]
LIGHT CONTROL AND
DIMMER SW
[COMB. SW]
KEY INTERLOCK
SOLENOID
UNLOCK WARNING SW
CENTER AIRBAG
SENSOR ASSEMBLY
WIPER AND WASHER SW
[COMB. SW]
BRAKE FLUID LEVEL
WARNING SW
A/C AMPLIFIERHEATER CONTROL SW
AIR VENT MODE
CONTROL SERVO MOTOR BLOWER SW BLOWER RESISTOR
REAR WINDOW
DEFOGGER SW
CIGARETTE LIGHTER TURN SIGNAL FLASHE R
ST RELAY DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT L H
DOOR KEY LOCK AND
UNLOCK SW FRONT LH
REMOTE CONTROL
MIRROR LH
CENTER AIRB AG
SENSOR ASSEMBLY
POWER OUTLET
VANITY LIGHT LH
VANITY LIGHT RH
MOON ROOF CONTROL
SW AND RELAY
PERSONAL LIGHT
MOON ROOF MOTOR
AND LIMIT SWA A
A A
A A
A A
A A B A
B A
B A
1J 81M31N1
A A
A
A
A
A
A
A
A A A
1N3
1V4
1F31G 7
1V 3IE1 20
IG IE B 2
B 2
B 3
B 2
BM IIANOISE FILTER W±B
W±B
W±B
W±B W±B W±B W±B W±B W±B
W±B
W±B W±B
W±B W±B(
*2)
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B
W±B
W±B
W±B
W± B(
*6)
W± B W± B
W±B W± B W±B W± B
W± B
JUNCTION CONNECTOR J38
JUNCTION
CONNECTOR J1 1
W±BW±B
W± B (
*3)
B 3 : * 6
B 2 : * 7
(
E)
(
E) (
CG)
(
E1)
(
E2)
W±B
(
*1 *6)
W±B
DAYTIME RUNNING
LIGHT RELAY (
MAIN) A A
W±B
(
*5)
(
1 MZ± FE MANUAL A/ C)2K9
I 1 TRANSPONDER KEY
AMPLIFIERW± B
W±B
W±B
W±B W±B W±B W±B W±B 1J 7
W±B
W± B
W±B
J 7
J UNCTION
CONNECTORB A, J 8 POWER WINDOW
MASTER SW AND
DOOR LOCK
CONTROL SW LH
DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT L H
DOOR KEY LOCK AND
UNLOCK SW FRONT LH
REMOTE CONTROL
MIRROR LHW±B(
*1)
W±B
W±B
W±B
W±B (
E)
(
E)
B13 (
*1)
(
*1)
(
*1) (
*1)
(
*2)
(
*2)
(
*2)
(
*2)(
*1)
W± B
(
*2)
A/C CONTROL
ASSEMBLYW± B
(
*9) (
*6)
(
*6)(
MANU AL A/ C)
(
MANU AL A/ C)
(
MANU AL A/ C)BLOWER RESISTOR
(
LOW SPEED)
A/C BLOWER MOTOR
LINEAR CONTROLLER I 7 W±B W±BW± B
(
*9)(
*9) (
*9)
ABS ECU (
GND)
(
GND2) AW±B(
*1)
W±B
(
*1)

SYSTEM INDEX
J OVERALL ELECTRICAL WIRING DIAGRAM
SYSTEMS LOCATION SYSTEMS LOCATION
ABS
TMC Made 19±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TMMK Made 20±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ABS and Traction Control 18±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning
Automatic A/C 29±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual A/C 27±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Antenna 24±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back±Up Light 8±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 1±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter and Clock 16±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter 25±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 17±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock Control 14±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator
1MZ±FE 4±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5S±FE 5±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control and Engine Immobiliser System
1MZ±FE 2±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5S±FE 3±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight
w/ Daytime Running Light 7±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
w/o Daytime Running Light 6±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 21±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination 10±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Light 9±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Reminder and Seat Belt Warning 21±3. . . . . . . . . . . . . . . . . . . . . . . . Light Auto Turn Off 9±1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moon Roof 21±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Outlet 16±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat 22±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source 1~29±1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window 13±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan 26±3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio and Player
Built±In Type Amplifier 24±3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separate Type Amplifier 23±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Defogger and Mirror Heater 26±2. . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 12±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock 16±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS 28±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting and Ignition 1±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light 11±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight 11±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Theft Deterrent 15±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Hazard Warning Light 8±2. . . . . . . . . . . . . . . . . . . . . . . . . .
Wiper and Washer 12±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless Door Lock Control 14±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .