1999 TOYOTA CAMRY ABS

ABS
W±R
11 IJ2 12 IJ2 ABS ECU
A 3A 10 B 2
B 1
SFRH B 1
B 5
SFRR A 5
B 3
SFLH A 6
B 7
SFLR A 11
B 4
SRRH A 12
B 8
SRRR B 15
B 2
SRLH B 14
B 6
SRLR
MA 4 A 1IG3 5 IG3 8 IG3 11IG3 4 60A
FL ABS
2 1 FROM POWER SOURCE SYSTEM
(
SEE PAGE 44)
24 13
36 214
3 3 3 3 3333
B 21 B 8 B 24 B 26IJ28
A 7 A 1
A 2 E 1B23DATA LINK
CONNECTOR 1 D 1
DATA LINK
CONNECTOR 2 D 2
14 4 111622
B
JUNCTION
CONNECTOR J 2 ABS MOTOR
RELAY
ABS SOL RELAY
ABS ACTUATORMT BS EBM
R±W W±L W±R W±B W±B
R+ SR MR5
B GR± RR±L R±L
R±L
G± B R±Y LG±R LG±RR±L GR± R W±B
W±L GR±LW± R
R±Y LG±R
LG±R(
SHORT PIN)
ABS TC TS WATCWB
G±B
EC IG3 6A C
B B
E1
BR BR BR
JUNCTION
CONNECTOR
A A3
R±B W±RL±B W± L W± RR±G G± Y LG±B
B J 6 A , J 7
B A13 A , A14
B A 4 A , A 5IJ1 1
IJ2 5IJ213
LG±B
G±Y
GR±R
R±B
EA JUNCTION
CONNECTOR J20
D/G TC TS
MT SFRH SFRR SFLH SFLR SRRH SRRR SRLH SRLR
BR
GR±L
GR W± B
BRBR

A1 2 1 2 1D 21C7 1J 9
IK1 1 IK1 2 IB1 9 IB1 3
2 1 2 1 B 22 B9J24
10 B23 B 13 B5 B 11FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
R±L
B±R B±R
G±W G±WR±L
R
G G R
W
BW
B
ABS SPEED SENSOR
FRONT LHABS SPEED SENSOR
FRONT RH D D10A
GAUGE
ABS WARNING
LIGHT
[COMB. METER]
ABS SPEED SENSOR
REAR LHABS SPEED SENSOR
REAR RH 15A
ECU±IG15A
STOP
ABS ECUA 6 A 7R±L
J 3
JUNCTION
CONNECTOR
C12
B
B J23
A19 A201R 51R 4
STOP LIGHT SW
W G± W1 2S 4
IFB 12 B 25
A
JUNCTION
CONNECTOR J 9
W±B W±B
IF1 12
C7
C4
G±B G± B
B CA A
C CCIJ2 1IJ26
A 9 A 3 A 2 A 8
R
G
W
BGRJUNCTION
CONNECTOR JUNCTION
CONNECTOR J22
JUNCTION
CONNECTOR J12
G± B
GND GND,
B A13 A , A14
WA IG1 STP FL+ FL± FR+ FR±
RL+ RL± RR+ RR±

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
FRONT TURN SIGNAL
LIGHT AND PARKING
LIGHT LH
FRONT TURN SIGNAL
LIGHT AND PARKING
LIGHT RH
RADIATOR FAN
MOTOR
WASHER LEVEL
WARNING SW
WATER TEMP. SW
NO. 1
FAN NO. 2 RELAYABS SOL RELAY
FAN NO. 3 RELAY
HTR RELAY
ENGINE MAIN RELAY
EFI RELAY
FRONT WIPER MOTORABS ACTUATOR
1
1
1EA12
E 2 E 2
E 2
E 2
E 2
E 2
E 2
2J 10
2F4
2C 5
EB3
E 1
EA 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

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

J POWER SOURCE (Current Flow Chart)
Instrument Panel J/B (See Page 22)
FuseSystemPage
5AIGN
Charging
Combination Meter
Electronically Controlled Transmission and A/T Indicator
Engine Control
SRS52
138
102
54
11 7
5ASTARTER
Combination Meter
Electronically Controlled Transmission and A/T Indicator
Engine Control
Starting and Ignition138
102
54
48
7.5AOBDEngine Control54
7.5APANEL
Cigarette Lighter and Clock
Combination Meter
Illumination126
138
80
7.5ARAD±NO.2Radio and Player136
7.5ATURNTurn Signal and Hazard Warning Light72
10AGAUGE
ABS
Back±Up Light
Charging
Combination Meter
Cruise Control
Door Lock Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Power Window
Stop Light
Taillight11 2
88
52
138
108
98
102
54
128
68
94
74
84
10AHEATERAir Conditioning
Rear Window Defogger and Mirror Heater148
134
10AMIRROR±HEATEREngine Control
Rear Window Defogger and Mirror Heater54
134
10ATAILEngine Control
Taillight54
84
15ACIG
Cigarette Lighter and Clock
Remote Control Mirror
Shift Lock
SRS126
132
122
11 7
15AECU±IG
ABS
Cruise Control
Radiator Fan and Condenser Fan
Shift Lock11 2
108
144
122
*These are the page numbers of the first page on which the related system is shown.

J
FuseSystemPage
15APOWER±OUTLETPower Outlet130
15ASTOP
ABS
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Shift Lock
Stop Light11 2
108
102
54
122
74
25ADOOR
Door Lock Control
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off
Power Window98
76
128
68
94
25AWIPERWiper and Washer90
30APOWERDoor Lock Control
Power Window98
94
40AAM1Charging
Radiator Fan and Condenser Fan52
144
40ADEFRear Window Defogger and Mirror Heater134
Engine Room J/B No.2 (See Page 24)
FuseSystemPage
5AALT±SCharging52
7.5ADOME
Cigarette Lighter and Clock
Combination Meter
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off126
138
76
128
68
10AECU±BCombination Meter
SRS66
68
10AHAZARDTurn Signal and Hazard Warning Light48
10AHORNHorn52
15AHEAD (LH)Headlight144
15AHEAD (RH)Headlight144
20AEFIElectronically Controlled Transmission and A/T Indicator
Engine Control102
54
20ARADIO NO.1Radio and Player48
30AAM2
Charging
Electronically Controlled Transmission and A/T Indicator
Engine Control
Starting and Ignition136
102
54
66
30ACDSRadiator Fan and Condenser Fan66
30ARDIRadiator Fan and Condenser Fan138
*These are the page numbers of the first page on which the related system is shown.