1999 TOYOTA CAMRY ABS

*The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
ABS = Anti±Lock Brake System
A/C = Air Conditioning
A/T = Automatic Transaxle
COMB. = Combination
ECU = Electronic Control Unit
EGR = Exhaust Gas Recirculation
ESA = Electronic Spark Advance
EVAP = Evaporative Emission
FL = Fusible Link
IAC = Idle Air Control
J/B = Junction Block
LH = Left±Hand
O/D = Overdrive
R/B = Relay Block
RH = Right±Hand
SFI = Sequential Multiport Fuel Injection
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
VSV = Vacuum Switching Valve
w/ = With
w/o = Without

G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Condenser Fan Motor
A 2 A/C Magnetic Clutch and Lock Sensor
A 3 A/C Triple Pressure SW
(A/C Dual and Single Pressure SW)
A 4 ABS Actuator
A 5 ABS Actuator
A 6 ABS Speed Sensor Front LH
A 7 ABS Speed Sensor Front RH
A 8 Air Fuel Ratio Sensor
A 9 Airbag Sensor Front LH
A 10 Airbag Sensor Front RH
B 1 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Crankshaft Position Sensor
C 3 Cruise Control Actuator
D 1 Data Link Connector 1
E 1 Electronically Controlled Transmission Solenoid
E 2 Electronically Controlled Transmission Solenoid
E 3 Engine Coolant Temp. SensorF 1 Front Turn Signal Light and Parking Light LH
F 2 Front Turn Signal Light and Parking Light RH
F 3 Front Wiper Motor
F 4 Fuel Pressure Sensor (Delivery Pipe)
F 5 Fuel Pressure Sensor (Fuel Pipe)
F 6 Fuel Shutoff Valve (Delivery Pipe)
F 7 Fuel Shutoff Valve (Fuel Pressure Regulator)
F 8 Fuel Temp. Sensor (Delivery Pipe)
F 9 Fusible Link Block
F 10 Fusible Link Block
F 11 Fusible Link Block
F 12 Fusible Link Block
F 13 Fusible Link Block
F 14 Fusible Link Block
G 1 Generator
G 2 Generator
H 1 Headlight LH
H 2 Headlight RH
H 3 Horn (High)
H 4 Horn (Low)

G
Position of Parts in Engine Compartment
I 1 Idle Air Control Valve
I 2 Ignition Coil and Igniter No.1
I 3 Ignition Coil and Igniter No.2
I 4 Injector No.1
I 5 Injector No.2
I 6 Injector No.3
I 7 Injector No.4
I 8 Intake Air Temp. Sensor
M 1 Manifold Absolute Pressure Sensor
N 1 Noise Filter (Ignition)
O 1 Oil Pressure SW
P 1 Park/Neutral Position SW,A/T Indicator Light SW and
Back±Up Light SW
P 2 Power Steering Oil Pressure SWR 1 Radiator Fan Motor
S 1 Starter
S 2 Starter
T 1 Throttle Position Sensor
V 1 Vehicle Speed Sensor (Combination Meter)
V 2 VSV (EGR)
W 1 Washer Level Warning SW
W 2 Washer Motor
W 3 Water Temp. Sender
W 4 Water Temp. SW No.1

G ELECTRICAL WIRING ROUTING
Position of Parts in Instrument Panel
A 11 A/C Evaporator Temp. Sensor
A 12 A/C SW
A 13 ABS ECU
A 14 ABS ECU
A 15 Air Vent Mode Control Servo Motor
A 16 Airbag Squib (Front Passenger Airbag Assembly)
A 17 Airbag Squib (Steering Wheel Pad)
A 18 Ashtray Illumination
B 2 Blower Motor
B 3 Blower Resistor
B 4 Blower SW
C 4 Center Airbag Sensor Assembly
C 5 Center Airbag Sensor Assembly
C 6 Center Airbag Sensor Assembly
C 7 Cigarette Lighter
C 8 Cigarette Lighter Illumination
C 9 Clock
C 10 Combination Meter
C 11 Combination Meter
C 12 Combination Meter
C 13 Combination SW
C 14 Combination SW
C 15 Combination SW
C 16 Cruise Control ECUD 2 Data Link Connector 2
D 3 Data Link Connector 3
D 4 Diode (Courtesy)
D 5 Diode (Dome)
D 6 Diode (Idle±Up)
E 4 Engine Control Module
E 5 Engine Control Module
E 6 Engine Control Module
E 7 Engine Control Module
G 3 Glove Box Light and SW
H 5 Hazard SW
H 6 Heated Oxygen Sensor
H 7 Heater Control SW
I 9 Ignition Key Cylinder Light
I 10 Ignition SW
I 11 Integration Relay
I 12 Integration Relay

G ELECTRICAL WIRING ROUTING
Position of Parts in Body
A 19 ABS Speed Sensor Rear LH
A 20 ABS Speed Sensor Rear RH
B 5 Buckle SW LH
C 17 Condenser
D 7 Door Courtesy SW Front LH
D 8 Door Courtesy SW Front RH
D 9 Door Courtesy SW Rear LH
D 10 Door Courtesy SW Rear RH
D 11 Door Key Lock and Unlock SW Front LH
D 12 Door Key Lock and Unlock SW Front RH
D 13 Door Lock Control SW RH
D 14 Door Lock Motor and Door Unlock Detection SW
Front LH
D 15 Door Lock Motor and Door Unlock Detection SW
Front RH
D 16 Door Lock Motor and Door Unlock Detection SW
Rear LH
D 17 Door Lock Motor and Door Unlock Detection SW
Rear RHF 15 Front Door Speaker LH
F 16 Front Door Speaker RH
F 17 Fuel Temp. Sensor and Fuel Shutoff Valve (Fuel Tank)
H 8 High Mounted Stop Light
I 13 Interior Light
J 33 Junction Connector
J 34 Junction Connector
J 35 Junction Connector
L 1 License Plate Light LH
L 2 License Plate Light RH
L 3 Light Failure Sensor
L 4 Luggage Compartment Light
L 5 Luggage Compartment Light SW

POWER SOURCE
1260A FL ABS
3
1
1
2B2
2A1
2B3
1240A MAIN
EB B 1F1F2E1
A 1C1D1 E 31
1
1
2L4
2G3
2G4 2C5
2K6 1
4
1
3
4
1
3
1
4 2
5
2
5
2
3 B
B
BB±R L±WL±B L±R
L±B W±B B±G
B±R
W±B
W±R
B±G
B±R B±R
B±R
L±B
W±B
W±B
W±B R±B
BATTERY
FL MAIN 3. 0W
100A
ALT50A
HTR GENERATOR G 2
HTR RELAY
ENGINE MAIN RELAY
20A EFI
10A HAZARD
20A RADIO NO. 1
10A HORN
30A AM2
SHORT PIN
5A ALT±S
HEAD RELAY
15A HEAD (
RH)
15A HEAD (
LH)30A CDS30A RDI
10A ECU±B
7. 5A DOME 112
1
10A A/C
2F4
W±B
B±R
12L±R
F 9 BA, F10
F12
FUSIBLE LINK BLOCKE D, F13C , F11
F , F14, B±G
1
12
2

ENGINE CONTROL
1 2
1 2
2 1
I 4
I 4 C 10 C23 D4 D 9A 2B14 B6
B 1
B 9
B 11
B 2
B 3
B 4
1 2
1 2 1 314 B B B B
2 3 1 223 BB
BR
B±Y B±YBR B±Y B±Y
BR Y
G±BY±B BRB±YY
LG
BR BRYW±B
W
P±B
P
G
BRB B±Y B±Y B±Y
PIM VC E2
VC VTA E2J18
JUNCTION
CONNECTOR
IDLE AIR CONTROL VALVE
VSV (
EGR)
FUEL SHUTOFF VAL VE
(
DELIVERY PIPE) FUEL SHUTOFF VALVE
(
FUEL PRESSURE
REGULATOR)
AIR FUEL RATIO SENSOR I 1
V 2
F 6F 7
A 8
MANIFOLD ABSOLUTE
PRESSURE SENSOR M 1
INTAKE AIR TEMP. SENSOR
ENGINE COOLANT TEMP. SENSOR I 8
E 3
ENGINE CONTROL MODULEB E 4 E 5ACE 6
(
SHIELDED)
+B AF +
AF± HT L±B
IG1 6
L±B Y±G
2
IB1Y
BR, , DE 7 ,
I 5 IG23
BR
THROTTLE
POSITION
SENSOR T 1BR
B±W
L
IG1 7
G
D 5D7
I 4D 6
23 23
11
G± BY
G±R
Y BR
BR BR
P±B BR
2
1
FUEL TEMP. SENSOR
(
DELIVERY PIPE) F 8
BR W±B
BR
PCNG2 PCNG1 VC VTA E2 PIM THA THW THCNG2 VCNG2 RSD EGR VCNG3 HTAF AF± AF+
BR
LGY
132
Y
B± Y
L
VOUT VC VOUT VC
GND GND
FUEL PRESSURE SENSOR
(
DELIVERY PIPE) F 4
FUEL PRESSURE SENSOR
(
FUEL PIPE) F 5
I 4I 4 I 4 I 4 BR BR BR BR

This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor detects the intake air temp. , which is input as a control signal into TERMINAL THA of the
engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINAL OX2 of the engine
control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G of the engine control module, and engine RPM is input
into TERMINAL NE.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C amplifier is built in the engine control module. The signal from the A/C SW is input into TERMINAL A/CS of the
engine control module.
(9) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the manifold absolute pressure sensor (for manifold pressure) and is input as a control
signal into TERMINAL PIM of the engine control module.
(11) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL NSW of the engine control module as a control signal.
(12) Electrical load signal circuit
The signal when systems such as the rear window defogger, headlights, etc. Which cause a high electrical burden are
on is input to TERMINAL ELS as a control signal.
(13) Air fuel ratio signal circuit
The air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE