1999 TOYOTA CAMRY relay

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

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

1230A POWER
1240A DEF
12
40A AM1 1B4
1B1
1K2
1K6
1K1
1K3
1K4
1K5
1B51J7
AM1
AM2 7 23
6 ACC
IG1
IG2
ST24
8I 2
IF 25A DOOR
15A STOP
7. 5A OBDTAI LL IGHT REL AY10A TAIL
7. 5A PANEL
POWER RELAY
NOISE FILTER
NOISE FILTER
DEFOGGER RELAY
10A MIRROR±HEATER
15A CIG
7. 5A RAD±NO. 2
15A POWER±OUTLET
15A ECU±IG
10A HEATER
10A GAUGE
25A WIPER
7. 5A TURN
5A IGN
5A STARTER
JUNCTION
CONNECTOR IGNITION SW I10
J 9 B±R
B±R
W B±R
W±B
L±R
B±Y
B±R
R1
1 5
1
5
1
5
13
2
3
2
2
2
3
2
W±R
W±R
A
W±B
1A6
B±R

POWER SOURCE
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
TAILLIGHT RELAY
5±3 : Closed with the light control SW at TAIL or HEAD position
I10 IGNITION SW
2±3 : Closed with the ignition SW at ACC or ON position
2±4 : Closed with the ignition SW at ON or ST position
7±6 : Closed with the ignition SW at ON or ST position
7±8 : Closed with the ignition SW at ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
F9A28F12D28G228
F10B28F13E28I1030
F11C28F14F28J931
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
126Engine Room R/B No.1 (Engine Compartment Left)
326Engine Room R/B No.3 (Radiator Upper Support RH)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A
1B22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K
2A
2B
2C24Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2F
gg(g)
2G
2K24Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2L24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
EB34Left Radiator Side Support
IF36Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E334Cowl WireI238Cowl Wire
SERVICE HINTS

STARTING AND IGNITION
2L 4
2A 1
IF M 1
A1
B±R
B±G
B±RB
IGNITION SW
32 51
30A
AM2ST
RELAY
PARK/NEUTRAL
POSITION SW
BATTERY FL MAIN
3. 0WI10
P 1
BP
N5
6 2D 52K92J11 40A
MAIN 76
8 AM2 IG2
ST2
5A
STARTER
1J 31K 4
1B 51K 5
W± R
2B 3
JUNCTION
CONNECTOR J 9
W± B
B
ABB B±W
GR B
GR GR
B±WW±R
JUNCTION
CONNECTOR J22
C 1
A 1
A BABIG2 11
IG2 10 R
B±W
GR
GR W±B
B±W
1 2
J 6
JUNCTION
CONNECTORB A, J 7
S 1
STARTERB A, S 2 F 9
FUSIBLE LINK
BLOCKC A, F11B±RB±R
IG312
B B±R
C B±W1C8
1K3

ENGINE CONTROL
11
11 23 15
CIR OPN
RELAY 5A
IGN
30A
AM2 1K 5
2L 41K 31W7
1C 8 1B 5
2A 1
BK IB 1 7EB1 4 EB1 5 C 1
A 176
8 AM2 IG2
ST2B±R
L±B L±B L±B W±B W±BG± RB±RB±R W±R W±R B B±G
23 1520A
EFI FROM POWER SOURCE
SYSTEM (
SEE PAGE 44)
EB2K 7
2F 42C10
W±B W±B
IGNITION SW I10
BATTERY FL MAIN
3. 0WEFI
RELAY
JUNCTION
CONNECTOR J34 A
G±R
2J8
2J2
B±R
FUSIBLE
LINK BLOCK2C 5
W±B
B±R
IG1 2
IB1 4
13
24 B±R
FUEL TEMP. SENSOR AND
SHUTOFF VALVE
(
FUEL TANK) F1 7
R
B±Y
L±B
LG±B
G± R
B±R
B±R
BR B±Y
LG±B LG±B
C F 9 A , F11
BR
W±B
B±R
B±R
L±BR

FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1C 91J11
1 2
2 1
IJ2 7
IJ2 9IG3 10 IG2 1
1 I 4 I 4
A 10 A 15A 21 D10 C18 B 10B 12 B 15 C4C17 C5D3
2 1B 8
2 A
B 12 3
A
1 3
2 5 1
BR
B±YBR B±Y
BR
BR
BR
B±Y TE1
B± LL±R L±W BR
W± L W±L W± LG L±Y
G L±Y R±BR±B R±W
R±BL±W
B± R
BR
L
B±W
G± O G± O
B±YB±Y
BR
E1 +B
10A TAIL
10A
MIRROR±
HEATER (
SHIELDED)
(
SHIELDED) L
B±R
DIODE
(
IDLE±UP)
DATA LINK
CONNECTOR 1
CRANKSHAFT
POSITION SENSOR
CAMSHAFT
POSITION SENSOR
JUNCTION
CONNECTORD 1
C 2
C 1
J12
D 6
JUNCTION CONNECTOR
A/C SWHEATER CONTROL SW
POWER STEERING OIL PRESSURE SWFROM MG
CLT RELAY
FROM
A/C DUAL
PRESSURE SW
TO A/C
MAGNETIC
CLUTCH AND
LOCK SENSORJ12
P 2 H 7
A12
BR
ENGINE CONTROL MODULEB E 4 E 5ACE 6 , , D, E 7
IG1 8D 12
LL JUNCTION
CONNECTOR J 8
C 5
CENTER AIRBAG
SENSOR ASSEMBLYIG1 9
B± R
A A
4
L
TE1 NE NE± G EL S
LOCK A/CS F/PS MGC PRS LOCK IN THRPSW
A/C EVAPORATOR
TEMP. SENSOR A11
B
IG1 1

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