1999 TOYOTA CAMRY fuel pressure

ABS AND TRACTION CONTROL
(ABS)
ABS is a brake system designed for the purpose to improve the operating ability securing the stability of the vehicle by
preventing the looking±up of the vehicle controlling the wheel cylinder pressure of all the four wheels at the time of sudden
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 and traction ECU.
(2) Stop light SW signal
A signal is input to TERMINAL STP of the ABS and traction ECU when brake pedal is depressed.
2. SYSTEM OPERATION
When the wheels are to be locked±up, the solenoid inside the actuator will be controlled by the signal from the ABS and
traction ECU and the brake fluid in the wheel cylinder will flow through the reservoir and reduce the hydraulic pressure.
While the ABS is in operation, as the ABS and traction ECU always outputs the operation signal to the pump inside the
actuator, brake fluid stored inside the reservoir will be suctioned up by the pump inside the actuator and returned to the
master cylinder.
When the hydraulic pressure of the wheel cylinder is decompressed or increased until the necessary hydraulic pressure, the
solenoid inside the actuator is controlled by the control signal from the ABS and traction ECU and as a result, hydraulic
pressure of the wheel cylinder will be closed at both routes of the master cylinder and reservoir sides and the hydraulic
pressure of the wheel cylinder will become to be in the holding condition.
If the increase of hydraulic pressure volume of the wheel cylinder becomes necessary, with the control signal from the ABS
and traction ECU, the solenoid inside the actuator will be controlled and become the same condition as usual and the brake
fluid of the master cylinder will be sent to the wheel cylinder and will increase the hydraulic pressure of the wheel cylinder. At
this time, in the case that the brake fluid stays left in the reservoir, it will be sucked up by the pump inside the actuator and
will be sent to the wheel cylinder.
Also, increasing speed of the hydraulic pressure is controlled by outputting the increasing and the said holding one after
another.
(Traction control)
Traction control system is designed to perform the engine output control by the fuel cut and hydraulic pressure control of
driving wheel brake and control the spinning of the driving wheels. By doing this, it improves starting acceleration and
operating ability of the vehicle securing the driving ability in accordance with the road surface condition.
3. TRACTION CONTROL OPERATION
Estimating the vehicle speed from the rear wheel speed, comparing it with the front, driving wheel speed and judging the grip
condition of the driving wheels. From the estimated vehicle speed, target speed of the driving speed will be set. When the
front, driving wheel speed exceeds the control starting speed, it judges that the tire slip is occurred and performs the fuel cut
cylinder number control and brake control and then adjust to make the front wheel speed become the traction control target
speed. Controlling of the traction control will be completed when the vehicle move onto the road where the driving wheels will
not have a tire slip or when the driver decelerate.
ABS MOTOR RELAY [R/B NO.3]
3±4 : Approx. 62 W
ABS SOL RELAY [R/B NO.3]
4±6 : Approx. 80 W
A9, A10 ABS SPEED SENSOR FRONT LH, RH
1±2 :0.6 kW±2.5 kW
A15 (A), A16 (B), A17 (C) ABS AND TRACTION ECU
(B) 8±GROUND : Approx. 12 volts with the ignition SW at ON position
(B)11±GROUND : Continuity with the ignition SW on and the traction off SW on (Traction control off)
(B)16±GROUND : Approx. 12 volts with the brake pedal depressed
(A)15, (C) 9, (C) 10±GROUND : Always continuity
A25, A26
ABS SPEED SENSOR REAR LH, RH
1±2 :1.2 kW±2.3 kW
T2 THROTTLE POSITION SENSOR
1±2 :3.5 kW±5.0 kW
SYSTEM OUTLINE
SERVICE HINTS

J OVERALL ELECTRICAL WIRING DIAGRAM
1
234
3 CAMRY(
Cont. next page)
2 1
3 5
2 1
3 5 1J 10 1K22L 41K 5
2J 82K7
11
1B 41B12A12C10 2J 22F4
11 1B 52
7ACC
IG1
IG2
ST 2 AM1 4
6 AM2
4 EB1
7ID15EB1
5 4
M
BLUnder the left
center pillar EB Lef t r adiator
side support 1F 2F 1C
1A
B±G
7. 5A OBD40A AM1 30A AM2 15A EFI EFI RELAYCI R OP N RE L AY
5A
IGN 1K 31C81K1
10A
GA U GE
1W 71D2
BABB 9 II3A
B
C
T 2
THROTTL E POSITI ON
SENSOR
M 1
MANI FOLD ABSOLUTE
PRESSURE SENSOR
V 1
VAPOR PRESSURE
SENSOR
1
A1 3
A/ C EVAPORATOR
TEMP. SENSOR
R Q O N ML KJI 1II2 10 IG3
Y
LG
B±Y
P
L±R
G±R
G±R
B±Y
B
B±R B±R
B±R B±R
B WW± R BB±YW± BW± B L±B L±B L±B G±R G±RG±R G±R R± L B±YB±Y B±Y L±WP Y B±YY LGY
B±RW±R B±RB±YB±Y
B
B±RB±R B±Y
B±Y
B±Y
BATTERYFUSIBLE LINK BLOCK
FL MAIN
3. 0W 100A
ALT1 2I16
IGNITION SW
B±R(
*2)
B±R
A
C10
MALFUNCTI ON INDICATOR LAMP
[COMB. METER]
7
2 D D
F1 4
FUEL
PUMP
J40
JUNCTI ON
CONNE CTORJ 4
JUNCTI ON
CONNE CTOR
JUNCTI ON
CONNE CTOR
B±Y
BR BR
BR BR
23
23 31 1
12
R± LB
PT NK VCC
PIM VC E2
E2
Y
B±R
2
BR
Power Source Engine Control and Engine Immobiliser System (
5S±FE)
D
E
F
B±W(
*1)B±R
5ID1 6ID13II2 2ID1
II47
II48 EA EB EB
EA BAG
P * 2 : w/o Engine Immobiliser System * 1 : w/ Engine Immobilis er Sy st em
(
*2)
(
*1)B±R(
*1)
B±W(
*1)
B±Y
B±Y(
*1)
B±Y B±Y B±YB±YH
L±R P Y BR BR
BRBR BR
Y
(
*1)
, F 6 F 4 A C , F 9 F
B J27 J28A,
2C 5W± B
7IK1
B±RB±R
(
*2)(
*1) B± R
(
*1)

J
5
678
25 CAMRY (
Cont' d)
11
B
7
C
13
C
6
B
3
B
5
C
2
A
1
A R
R±L
Y±R
G±W
BR
BR
IJ13
IJ16
IJ12
IJ178
C
6
C
15
B Y±G
P
LR
R±L
Y± R
G±W
BR
BR
Y±G
B±O
P
L
4
A4
C2
C 11
C2
B4
B3
A7
B
IG317
IK23
2 1
EBLeft radiat or
side support IGInstrument
panel br ace
LH 2 1IG23
IG16
7IG16
A
11
A
7
A
8
A 10
A
9
A
9
C
5
A
3
C
10
B
12
A
13
B 12
B 10
C9
B8
B5
B 16
B 13
A1
C1
B 14
B 12
C L
2
D
N
R
P
SLI P
TRAC OFF
DOOR
O/D OFF See Illuminat ion
System< 10±4>
A
R±W R± W
W± B R±WW± B
R±W
R±W R±W
B±O
P± L P±L P± LB±O(
*4) R± W (
*6)
(
*7)J 2
JUNCTI ON
CONNE CT OR
Fro m Da yti me
Running Light
Re la y(
Main)
< 7±2>
B
BB
(
*6)
J11
JUNCTION
CONNECTOR
B 2
BRAKE FLUID LEVEL
WARNING SWP 3
PARKING BRAKE SW W 1
WASHER L EVEL
WARNING SW
From Day time Running
Light Relay(
Main)
< 7±2>
Fr om Park /Neutral
Pos it ion SW(
A/T)
or
Clutch Start SW(
M/T)
<1±2>GR(
*3)
See Key Reminder and Seat Belt
Warning System< 21±3> See ABS(
TMC Made)
System< 19±2>
See ABS(
TMMK Made)
System< 20±2>
See ABS and Tr act ion
Control System< 18±1>See Engine Cont rol and
Immobiliser System< 2±3> < 3±2>See Charging
System< 1±4> See Taillight
System< 11±4>
SRS CRUISE HIGH BEAMOIL
SEAT BELTABS MA LF UNCT I ON I NDI CA TOR
LAMPWASHER LEVELBULB
CHE CK
RE L AY REAR LIGHTSBRAKE
CHARGETURN RHTURN LH ILLUMINATION
TRIP METER
ODOMETER
(
*5) TACHOMETERWATER
TEMP. FUEL
FUEL
SECURI TYSee Electronically Controlled
Transmission and A/T
Indicator System
<4±4><5±4>
See ABS and
Tr act ion Contr ol
Sy st em< 18±1>
See Tur n Signal and
Hazard Warning Light
Sy st em< 8±2> < 8±3>
See Headlight
Sy st em< 6±3> < 7±3>
Se e SRS Sy st e m
< 28±4> See Theft Deterrent
System< 15±3>
See Interior Light
System< 9±4>
See Electronically Controlled
Transmiss ion and A/T Indicator
System< 4±3> < 5±3>
See Illumination Sy st em
< 10±4>
IG33
V± W V± W
V±W V±WB B
B J15
JUNCTION
CONNE CT ORFrom Cruise Control
ECU< 17±4> From Engine Contr ol
Module
< 2±7> < 3±9> < 4±3> < 5±3>
IJ15
1
See Cruise Control
System< 17±2> Y±B Y±B
IF Left kick
panel
O 1
OIL PRESSURE SWJ 5
JUNCTI ON
CONNE CTOR
W± B W± B
A A See Char ging Sys tem
< 1±4> A
B
C
D
E
F
G
H
I* 4 : TMMK Made, TMC Made USA w/ Traction Control
* 5 : Speedometer * 3 : Except * 4
W± B IG36
1
Combination M eter
B±O From Engine
Control Module
< 2±12> < 3±9>
C 8 C 9,
COMBINATION METERABC10, C* 6 : w/ Daytime Running Light
* 7 : w/o Day time Running Light
Fr om A/C Contr ol
Assembly< 29±5>V±W

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 Actuator and ECU90080±98070
A 7ABS and Traction Actuator90980±11698
A 8ABS and Traction Actuator90980±11413
A 9ABS Speed Sensor Front LH90980±11075A10ABS Speed Sensor Front RH90980±11 075
A11Air Fuel Ratio Sensor90980±11178
A12A/C Amplifier90980±10807
A13A/C Evaporator Temp. Sensor90980±10825
A14A/C SW90980±10631
A15ABS and Traction ECU90980±11390
A16ABS and Traction ECU90980±11391
A17ABS and Traction ECU90980±11424A18ABS ECU90980±11424
A19ABS ECU90980±11390
A20Air Vent Mode Control Servo Motor90980±11165
A22Airbag Squib
(Front Passenger Airbag Assembly)90980±11884
A23Airbag Squib (Steering Wheel Pad)90980±10850
A24Ashtray Illumination81945±33010
A25ABS Speed Sensor Rear LH90980±11060A26ABS Speed Sensor Rear RH90980±11060
A27Auto Antenna Motor and Relay90980±11697
A28Air Fuel Ratio Sensor (Bank 1 Sensor 1)90980±11178A29Air Fuel Ratio Sensor (Bank 2 Sensor 1)90980±11 178
A30A/C Ambient Temp. Sensor90980±11070
A31Airbag Sensor Front LH90980±11856A32Airbag Sensor Front RH90980±11 856
A33A/C Blower Motor Linear Controller90980±11676
A34A/C Control Assembly90980±11390
A35A/C Control Assembly90980±11391
A36A/C Room Temp. Sensor90980±10825
A37A/C Solar Sensor90980±11918
A38Air Inlet Control Servo Motor90980±11165
A39Air Mix Control Servo Motor90980±11319
A40Automatic Light Control Sensor90980±11107
B 1Back±Up Light SW90980±11250
B 2Brake Fluid Level Warning SW90980±11207
B 3Blower Motor90980±10903
B 4Blower Resistor90980±10976
B 5Blower SW90980±10877
B 6Buckle SW LH90980±10825B 7Buckle SW LH90980±10825
B 8Blower Resistor (Low Speed)90980±10976
C 1Camshaft Position Sensor90980±10947C 2Crankshaft Position Sensor90980±10947
C 3Cruise Control Actuator90980±11150
C 4Cigarette Lighter90980±10760
C 5Cigarette Lighter Illumination90980±11148
C 6Clock90980±11013
C 7Clutch Start SW90980±10825
C8Combination Meter (TMC Made)90980±11114C 8Combination Meter (TMMK Made)90980±98048
C9Combination Meter (TMC Made)90980±11113C 9Combination Meter (TMMK Made)90980±98046
C10Combination Meter (TMC Made)90980±11115C10Combination Meter (TMMK Made)90980±98047
C11Combination SW90980±11594
C12Combination SW90980±11616
C13Combination SW90980±11672
C14Cruise Control Clutch SW90980±10906
C15Cruise Control ECU90980±11391
C16Condenser90980±10860
C17Center Airbag Sensor Assembly90980±11869
C18Center Airbag Sensor Assembly90980±11872
C19Center Airbag Sensor Assembly90980±11867
D1Data Link Connector 1 (1MZ±FE)90980±11195D 1Data Link Connector 1 (5S±FE)90980±11323
D 2Daytime Running Light Resistor90980±10928
D 3Diode (A/C)90980±11071
D 4Data Link Connector 290980±11417
D 5Data Link Connector 390980±11665
D6Daytime Running Light Relay (Main)90980±11058D 6Daytime Running Light Relay (Main)90980±11 058
D7Di d (C t )D7Diode (Courtesy)D 7Diode (Courtesy)90980±10962D10Diode (Dome)90980±10962
D11Diode (Idle±Up)90980±11071
D12Door Courtesy SW Front LH
D13Door Courtesy SW Front RH90980±10871D14Door Courtesy SW Rear LH90980±10871
D15Door Courtesy SW Rear RH
D16Door Key Lock and Unlock SW Front LH90980±11490D17Door Key Lock and Unlock SW Front RH90980±11490