1999 TOYOTA CAMRY brake sensor

Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also
flows through the rear lights warning light to TERMINAL 4 of the light failure sensor.
STOP LIGHT DISCONNECTION WARNING
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the
current flowing from TERMINAL 7 of the light failure sensor to TERMINAL 2 and 1 changes, so the light failure sensor
detects the disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear
lights warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the
warning circuit on holding and the warning light on until the ignition SW is turned off.
S4 STOP LIGHT SW
2±1 : Closed with the brake pedal depressed
L3 LIGHT FAILURE SENSOR
7±GROUND : Approx. 12 volts with the stop light SW on
4, 8±GROUND : Approx. 12 volts with the ignition SW at ON or ST position
11±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C10A30J331R833
C12C30J3432R1033
H832L332S431
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1C22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1R22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1S22Floor Wire and Instrument Panel J/B (Lower Finish Panel)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IC236Floor Wire and Instrument Panel Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
BK40Under the Left Center Pillar
BM40Back Panel Center
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
B340Floor WireB640Floor Wire
SYSTEM OUTLINE
SERVICE HINTS

The electronically controlled transmission, however, electrically controls the line pressure and lock±up pressure etc., through
the solenoid valve. Engine control module controls of the solenoid valve based on the input signals from each sensor which
makes smooth driving possible by shift selection for each gear which is most appropriate to the driving conditions at that
time.
1. GEAR SHIFT OPERATION
During driving, the engine control module selects the shift for each gear which is most appropriate to the driving conditions,
based on input signals from the engine coolant temp. sensor to TERMINAL THW of the engine control module, and also the
input signals to TERMINAL SPD of the engine control module from the vehicle speed sensor devoted to the electronically
controlled transmission. Current is then output to the electronically controlled transmission solenoid. When shifting to 1st
gear, current flows from TERMINAL S1 of the engine control module to TERMINAL (B) 3 of the solenoid to GROUND, and
continuity to the No.1 solenoid causes the shift.
For 2nd gear, current flows from TERMINAL S1 of the engine control module to TERMINAL (B) 3 of the solenoid to
GROUND, and from TERMINAL S2 of the engine control module to TERMINAL (B) 1 of the solenoid to GROUND, and
continuity to solenoids No.1 and No.2 causes the shift.
For 3rd gear, there is no continuity to No.1 solenoid, only to No.2, causing the shift.
Shifting into 4th gear (Overdrive) takes place when there is no continuity to either No.1 or No.2 solenoid.
2. LOCK±UP OPERATION
When the engine control module judges from each signal that lock±up operation conditions have been met, current flows
from TERMINAL SL of the engine control module to TERMINAL (A) 1 of the electronically controlled transmission solenoid to
GROUND, causing continuity to the lock±up solenoid and causing lock±up operation.
3. STOP LIGHT SW CIRCUIT
If the brake pedal is depressed (Stop light SW on) when driving in lock±up condition, a signal is input to TERMINAL STP of
the engine control module, the engine control module operates and continuity to the lock±up solenoid is cut.
4. OVERDRIVE CIRCUIT
*O/D main SW on
When the O/D main SW is turned on (O/D off indicator light turns off), a signal is input into TERMINAL OD2 of the engine
control module and engine control module operation causes gear shift when the conditions for overdrive are met.
*O/D main SW off
When the O/D main SW is turned to off, the current through the O/D off indicator light flows through the O/D main SW to
GROUND, causing the indicator light to light up. At the same time, a signal is input into TERMINAL OD2 of the engine
control module and engine control module operation prevents shift into overdrive.
E4 (A), E5 (B), E6 (C) ENGINE CONTROL MODULE
S1, S2±E1 :9.0±14.0 volts with the solenoid on
0±1.5 volts with the solenoid off
L±E1 :7.5±14.0 volts with the shift lever at L position
2±E1 :7.5±14.0 volts with the shift lever at 2 position
R±E1 :7.5±14.0 volts with the shift lever at R position
STP±E1 :9.0±14.0 volts with the brake pedal depressed
THW±E2 :0.2±1.0 volts with the ignition SW on and coolant temp. 80°C (176°F)
VTA±E2 :0.3±0.8 volts with the throttle valve fully closed
3.2±4.9 volts with the throttle valve fully opened
VC±E2 :4.5±5.5 volts
OD2±E1 :9.0±14.0 volts with the O/D main SW turned on
0±3.0 volts with the O/D main SW turned off
+B±E1 :9.0±14.0 volts
O2 O/D MAIN SW
2±4 : Closed with the O/D main SW off, open with the O/D main SW on
SYSTEM OUTLINE
SERVICE HINTS

ABS
This system controls the respective brake fluid pressures acting on the disc brake cylinders of the right front wheel, left front
wheel and rear wheels when the brakes are applied in a panic stop so that the wheels do not lock. This results in improved
directional stability and steerability during panic braking.
1. INPUT SIGNALS
(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS FL+, FR+, RL+ and RR+ of the ABS ECU.
(2) Stop light SW signal
A signal is input to TERMINAL STP of the ABS ECU when the brake pedal is depressed.
2. SYSTEM OPERATION
During sudden braking the ABS ECU has signals input from each sensor, which controls the current to the solenoid inside
the actuator and lets the hydraulic pressure acting on each wheel cylinder escape to the reservoir. The pump inside the
actuator is also operating at this time and it returns the brake fluid from the reservoir to the master cylinder, thus preventing
locking of the vehicle wheels.
If the ABS ECU judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current on the solenoid is
controlled and the hydraulic pressure is increased. Holding of the hydraulic pressure is also controlled by the ABS ECU, by
the same method as above. Pressure reduction, holding and increase are repeated to maintain vehicle stability and to
improve steerability during sudden braking.
A6, A7 ABS SPEED SENSOR FRONT LH, RH
2±1 : Approx. 1.6 kW (20°C, 68°F)
A19, A20 ABS SPEED SENSOR REAR LH, RH
2±1 : Approx. 1.6 kW (20°C, 68°F)
A14 (B) ABS ECU
(B)13±GROUND : Approx. 12 volts with the ignition SW at ON or ST position
(B) 5±GROUND : Approx. 12 volts with the brake pedal depressed
(B)12, (B) 25±GROUND :
Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A4A28C1230J1231
A5B28D128J2031
A628D230J2231
A728J231J23A31
A13A30J331J24B31
A14B30J6A31S431
A1932J7B31
A2032J931
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
326Engine Room R/B No.3 (Radiator Upper Support RH)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1C22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1D22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1R22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
SYSTEM OUTLINE
SERVICE HINTS

5A
STARTER FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1J 3
IH1 5IC2 5 IE2 5IF117 IE23
IJ2 3B 2
B 5C10 A4C4C11 A3B7A12
EBB C
A B
IE1 6
11
IE1 7
2 1
IF
B±W 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
PARK/NEUTRAL
POSITION SW P 1
OIL PRESSURE
SW O 1
WASHER LEVEL
WARNING SW W 1
JUNCTION
CONNECTOR J 1
BRAKE FLUID
LEVEL WARNING SW B 1
JUNCTION
CONNECTOR J 9
G±O
B
5
B 6
2B B
B
OI L
CRUISE
SEAT BELT
ABS
WASHER LEVEL
REAR LIGHTS
BRAKE
BULB
CHECK
RELAY
O/ D OFF
JUNCTION
CONNECTOR J22
P
N
A
TO CRUISE
CONTROL ECU
TO I NTEGRATION
RELAY
TO ABS ECU
TO LI GHT
FAI LURE
SENSOR
B±O
TO O/ D
MAIN SW
J 6
JUNCTION
CONNECTORB A, J 7
C10
COMBINATION METERB A, C11 C, C12
GR
IG211
IG210 B±W
GRGR
1
R±W
PARKING
BRAKE SW P 3

I GROUND POINT
2K 1J CRUISE CONTROL
ECU
DATA LINK
CONNECTOR 3
POWER RELAY
INTEGRATION RELAY
NOISE FILTER CRUISE CONTROL
ACTUATOR
CRUISE CONTROL SW
[COMB. SW]
LIGHT CONTROL AND
DIMMER SW
[COMB. SW]
KEY INTERLOCK
SOLENOID
UNLOCK WARNING SW
CENTER AIRBAG
SENSOR ASSEMBLY
BRAKE FLUID LEVEL
WARNING SW
BLOWER SW BLOWER RESISTOR
REAR WINDOW
DEFOGGER SW
CI GARETTE LI GHTERWIPER AND WASHER
SW [COMB. SW]
ST RELAY
CENTER AIRBAG
SENSOR
ASSEMBLY
POWER OUTLETA A
A A
A A
A A
A A B A
B A
1J 81M31N1
A A
A
A
A
9
A A
1N3
1V41G 7
1V 3ID1 20
IF ID IHNOISE FILTER W±B
W±B
W±B W±B W±B W±B
W±B W±B
7
W±B
W±B
W± BW±B
W±B
W± B
W± B
JUNCTION
CONNECTOR J 9
W±B W±B
(
CG)
(
E1)
W±B
W±B
W±B
W±B
W± B
J 6
JUNCTION
CONNECTORB A, J 7
DOOR LOCK MOTOR
AND DOOR UNLOCK
DETECTION SW
FRONT L H
DOOR KEY LOCK AND
UNLOCK SW FRONT LH
MIRROR HEATER LH
[REMOTE CONTROL
MIRROR LH]W±B
W±B
W±B
HEATER CONTROL SW
AIR VENT MODE
CONTROL SERVO MOTOR I 3W± B W± B
W±B
ABS ECU AW±B
W±B W±B
A
(
E2)TURN SIGNAL FLASHER
A
W±B
(
GND)
(
GND)
JUNCTION CONNECTOR J33
A W±B
W±BW± B
POWER WINDOW
MASTER SWA
W±B

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply. In case of ordering
a connector or terminal with wire, please confirm in advance if there is supply for it using ªParts Catalog
Newsº (published by Parts Engineering Administration Dept.).
A 1A/C Condenser Fan Motor90980±10928
A 2A/C Magnetic Clutch and Lock Sensor90980±10942
A 3A/C Triple Pressure SW (A/C Dual and
Single Pressure SW)90980±10943
A 4ABS Actuator90980±11413
A 5ABS Actuator90980±10891
A 6ABS Speed Sensor Front LH90980±11075A 7ABS Speed Sensor Front RH90980±11 075
A 8Air Fuel Ratio Sensor90980±11178
A 9Airbag Sensor Front LH90980±11856A10Airbag Sensor Front RH90980±11 856
A11A/C Evaporator Temp. Sensor90980±10825
A12A/C SW90980±10631
A13ABS ECU90980±11424
A14ABS ECU90980±11390
A15Air Vent Mode Control Servo Motor90980±11165
A16Airbag Squib (Front Passenger Airbag
Assembly)90980±11884
A17Airbag Squib (Steering Wheel Pad)90980±10850
A18Ashtray Illumination81945±33010
A19ABS Speed Sensor Rear LH90980±11060A20ABS Speed Sensor Rear RH90980±11060
B 1Brake Fluid Level Warning SW90980±11207
B 2Blower Motor90980±10903
B 3Blower Resistor90980±10976
B 4Blower SW90980±10877
B 5Buckle SW LH90980±10825
C 1Camshaft Position Sensor90980±10947C 2Crankshaft Position Sensor90980±10947
C 3Cruise Control Actuator90980±11150
C 4Center Airbag Sensor Assembly90980±11869
C 5Center Airbag Sensor Assembly90980±11872
C 6Center Airbag Sensor Assembly90980±11867
C 7Cigarette Lighter90980±10760
C 8Cigarette Lighter Illumination90980±11148
C 9Clock90980±11013
C10Combination Meter90980±11114
C11Combination Meter90080±98046
C12Combination Meter90980±11115
C13Combination SW90980±11594
C14Combination SW90980±11616
C15Combination SW90980±11672
C16Cruise Control ECU90980±11391
C17Condenser90980±10860
D 1Data Link Connector 190980±11323
D 2Data Link Connector 290980±11417
D 3Data Link Connector 390980±11665
D 4Diode (Courtesy)90980±10962D 5Diode (Dome)90980±10962
D 6Diode (Idle±Up)90980±11071
D 7Door Courtesy SW Front LH
D 8Door Courtesy SW Front RH90980±10871D 9Door Courtesy SW Rear LH90980±10871
D10Door Courtesy SW Rear RH
D11Door Key Lock and Unlock SW Front LH90980±11490D12Door Key Lock and Unlock SW Front RH90980±11490
D13Door Lock Control SW RH90980±11326
D14Door Lock Motor and Door Unlock
Detection SW Front LH
D15Door Lock Motor and Door Unlock
Detection SW Front RH
90980±11150
D16Door Lock Motor and Door Unlock
Detection SW Rear LH90980±11 150
D17Door Lock Motor and Door Unlock
Detection SW Rear RH
E 1Electronically Controlled Transmission
Solenoid90980±11156
E 2Electronically Controlled Transmission
Solenoid90980±11143
E 3Engine Coolant Temp. Sensor90980±10737
E 4Engine Control Module90980±11392
E 5Engine Control Module90980±11391
E 6Engine Control Module90980±11390
E 7Engine Control Module90980±11408
F 1Front Turn Signal Light and Parking Light
LH
90980±11020
F 2Front Turn Signal Light and Parking Light
RH90980±11020
F 3Front Wiper Motor90980±11599
F 4Fuel Pressure Sensor (Delivery Pipe)90980±10845F 5Fuel Pressure Sensor (Fuel Pipe)90980±10845
F 6Fuel Shutoff Valve (Delivery Pipe)90980±11156
F 7Fuel Shutoff Valve (Fuel Pressure
Regulator)90980±11038
F 8Fuel Temp. Sensor (Delivery Pipe)90980±10737
F 9Fusible Link Block90980±09566
F10Fusible Link Block90980±09567
F11Fusible Link Block90980±09566
F12Fusible Link Block99141±13006
F13Fusible Link Block82620±06010
F14Fusible Link Block90980±11579
F15Front Door Speaker LH90980±10825F16Front Door Speaker RH90980±10825
F17Fuel Temp. Sensor and Fuel Shutoff Valve
(Fuel Tank)90980±10795
G 1Generator90980±09213

L
CodePart Name Part NumberCodePart Name Part Number
G 2Generator90980±11349
G 3Glove Box Light and SW90980±11098
H 1Headlight LH90980±11314H 2Headlight RH90980±11314
H 3Horn (High)90980±10619H 4Horn (Low)90980±10619
H 5Hazard SW90980±10801
H 6Heated Oxygen Sensor90980±11028
H 7Heater Control SW90980±10799
H 8High Mounted Stop Light90980±11148
I 1Idle Air Control Valve90980±11145
I 2Ignition Coil and Igniter No.190980±11150I 3Ignition Coil and Igniter No.290980±11 150
I 4Injector No.1
I 5Injector No.290980±11153I 6Injector No.390980±11 153
I 7Injector No.4
I 8Intake Air Temp. Sensor90980±11163
I 9Ignition Key Cylinder Light90980±10906
I10Ignition SW90980±11615
I11Integration Relay90980±11107
I12Integration Relay90980±11542
I13Interior Light90980±10121
J 1Junction Connector90980±10803
J 2Junction Connector90980±11542
J 3Junction Connector90980±10803
J 4Junction Connector90980±11542
J 5Junction Connector90980±11502
J 6Junction Connector90980±11661J 7Junction Connector90980±11661
J 8Junction Connector90980±11398
J 9Junction Connector90980±10976
J10Junction Connector90980±11661J11Junction Connector90980±11661
J12Junction Connector90980±10803
J13Junction Connector90980±11661J14Junction Connector90980±11661
J15Junction Connector90980±10803
J16Junction Connector90980±11661J17Junction Connector90980±11661
J18Junction Connector90980±11542J19Junction Connector90980±11542
J20Junction Connector90980±11539
J21Junction Connector90980±11529
J22Junction Connector90980±11502
J23Junction Connector
J24Junction Connector90980±11661J25Junction Connector90980±11661
J26Junction Connector
J27Junction Connector90980±11542
J28Junction Connector90980±11661J29Junction Connector90980±11661
J30Junction Connector90980±10803
J31Junction Connector90980±11661J32Junction Connector90980±11661
J33Junction Connector90980±10803
J34Junction Connector90980±10976
J35Junction Connector90980±10803
K 1Key Interlock Solenoid90980±10825
L 1License Plate Light LH90980±11148L 2License Plate Light RH90980±11148
L 3Light Failure Sensor90980±10803
L 4Luggage Compartment Light90980±11148
L 5Luggage Compartment Light SW90980±11097
M 1Manifold Absolute Pressure Sensor90980±10845
N 1Noise Filter (Ignition)90980±10843
N 2Noise Filter (Rear Window Defogger)90980±11259
O 1Oil Pressure SW90980±11363
O 2O/D Main SW and A/T Shift Lever
Illumination90980±10795
P 1Park/Neutral Position SW,A/T Indicator Light
SW and Back±Up Light SW90980±11332
P 2Power Steering Oil Pressure SW90980±11428
P 3Parking Brake SW90980±10871
P 4Power Outlet90980±10760
P 5Power Window Control SW Front RH90980±10789
P 6Power Window Control SW Rear LH90980±10631P 7Power Window Control SW Rear RH90980±10631
P 8Power Window Master SW and Door Lock
Control SW LH90980±10807
P 9Power Window Motor Front LH
P10Power Window Motor Front RH90980±10860P11Power Window Motor Rear LH90980±10860
P12Power Window Motor Rear RH
P13Pretensioner LH90980±11862P14Pretensioner RH90980±11862
R 1Radiator Fan Motor90980±10928
R 2Radio and Player90980±10996
R 3Radio and Player90980±10997
R 4Rear Window Defogger SW90980±11280
R 5Remote Control Mirror SW90980±11450

H17GRAY
12X 4
2 1
X7 8
X11 X

X
3


61

2

13



X 4






X
3


6 C7 L4 R6 R7 S6
[X] [O]
[P]
[Q]
[R]
[S]
[T]
[U]
[V]
[W]
B HOW TO USE THIS MANUAL
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
STOP LIGHT DISCONNECTION WARNING
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
S6 STOP LIGHT SW
2±1 : Closed with the brake pedal depressed
L4 LIGHT FAILURE SENSOR
1, 2, 7±GROUND : Approx. 12 volts with the stop light SW on
4, 8±GROUND : Approx. 12 volts with the ignition SW at ON position
11±GROUND : Always continuity
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C734L436R737
H1736R637S635
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
118R/B No.1 (Instrument Panel Left)

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ÀÀÀ ÀÀÀ ÀÀÀ
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
IB20Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
3C22Instrument Panel Wire and J/B No.3 (Instrument Panel Left Side)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE142Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV150Luggage Room Wire and Floor Wire (Luggage Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
BL50Under the Left Quarter Pillar
BO50Back Panel Center
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I544Cowl WireB1850Luggage Room Wire
SYSTEM OUTLINE
SERVICE HINTS