1999 TOYOTA CAMRY relay

Current always flows from the HTR fuse to TERMINAL 1 of the HTR relay. When the ignition SW is turned on, the current
from the HEATER fuse flows to TERMINAL 6 of the air vent mode control servo motor, and to the MG CLT relay (Coil side) to
TERMINAL (A) 21 of the engine control module, and to TERMINAL 1 of the A/C dual pressure SW to TERMINAL 4 to
TERMINAL (D) 10 of the engine control module, and to the HTR relay (Coil side) to TERMINAL 3 of the blower SW.
1. AIR VENT MODE CONTROL SERVO MOTOR OPERATION
When the damper is in FACE position and B/L mode on the heater control SW is selected, current flows from TERMINAL 7
of the heater control SW to TERMINAL 2 of the air vent mode control serve motor so that a signal that the ground circuit is
activated is input into TERMINAL B of the control circuit inside the air vent mode control servo motor. Simultaneously, a
signal that the ground circuit is not activated is input into TERMINAL A of the control circuit inside the servo motor. These two
signals activate the control circuit so that current flows from the HEATER fuse to the servo motor, causing the servo motor to
operate and the damper to move to B/L position. When the damper reaches B/L position. A ground cut signal is input into
TERMINAL B of the control circuit, the control circuit operates, the servo motor stops rotating and the damper stops at B/L.
When another mode position is selected, input of signals into TERMINAL A and TERMINAL B of the control circuit that
ground is made or not (as explained above) activates the control circuit and moves the serve motor to the desired position.
2. AIR CONDITIONING OPERATION
When the blower SW is on, current flows from the HEATER fuse to the HTR relay (Coil side) to TERMINAL 3 of the blower
SW to TERMINAL 1 to GROUND, activating the HTR relay. This causes current to flow from the HTR fuse to the HTR relay
(Point side) to A/C fuse to TERMINAL 2 of the A/C SW. If the A/C SW is turned on at this time, a signal is input into the
engine control module. This activates the engine control module and MG CLT relay so that current flows from the HEATER
fuse to the MG CLT relay (Point side) to A/C magnetic clutch. Causing The compressor to operate.
When blower SW is on and heater control SW is at DEF position, it causes A/C to run whether A/C SW is on or not.
HTR RELAY
1±2 : Closed with the ignition SW at ON or ST position and the blower SW on
MG CLT RELAY
5±3 : Closed with the ignition SW at ON or ST position,
the blower SW on and the A/C SW on or the heater control SW at DEF position
A3 A/C DUAL PRESSURE SW
1±4 : Open with pressure less than approx. 2.0 kgf/cm
2 (28 psi, 196 kpa) or above approx. 32 kgf/cm2 (455 psi, 3138 kpa)
B3
BLOWER RESISTOR
2±1 : Approx. 1.64 W
2±3 : Approx. 3.24 W
2±6 : Approx. 0.47 W
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A228B430J731
A328E4A30J931
A1130E5B30J1231
A1230E6C30J2031
A1530E7D30J3031
B230F1328
B330H730
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
126Engine Room R/B No.1 (Engine Compartment Left)
SYSTEM OUTLINE
SERVICE HINTS

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

I GROUND POINT
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
J431J931J3332
J6A31J1831J3432
J7B31J2031J3532
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
126Engine Room R/B No.1 (Engine Compartment Left)
326Engine Room R/B No.3 (Radiater Upper support RH)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1G22Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
1J
1M22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1N22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1V
2C24Engine Room Main Wire and Engine Room J/B No 2 (Engine Compartment Left)2F24Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2J24Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2K24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
EA134Engine Room Main Wire and Engine Room Main No.3 Wire (Radiator LH)
ID136Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IG1
IG238Engine Wire and Cowl Wire (Under the Blower Motor)
IG3
g()
IH138Engine Wire and Instrument Panel Wire (Under the Blower Motor)
IJ238Engine Room Main Wire and Cowl Wire (Right Kick Panel)
IL138Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
BA140Rear Door Wire LH and Floor Wire (Under the Left Center Pillar)
BB140Rear Door Wire RH and Floor No.2 Wire (Under the Right Center Pillar)
: GROUND POINTS
CodeSee PageGround Points Location
EA34Right Radiator Side Support
EB34Left Radiator Side Support
EC34Intake Manifold
ID36Cowl Side Panel LH
IE36Left Kick Panel
IF36Instrument Panel Brace LH
IG36Instrument Panel Brace RH
IH36Cowl Side Panel RH
II36Right Kick PanelIJ36Right Kick Panel
BK40Under the Left Center Pillar
BL40Under the Right Center Pillar
BM40Back Panel Center

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

M
[A]: System Title
[B]: Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B = Black W = White BR = Brown
L = Blue V = Violet SB = Sky Blue
R = Red O = Orange LG = Light Green
P = Pink Y = Yellow GR = Gray
G = Green
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example: L ± Y
L
(Blue)Y
(Yellow)
[C]: The position of the parts is the same as shown in
the wiring diagram and wire routing.
[D]: Indicates the pin number of the connector.
The numbering system is different for female
and male connectors.
Example :
Numbered in order
from upper left to
lower rightNumbered in order
from upper right to
lower left
Female Male
The numbering system for the overall wiring
diagram is the same as above
[E]: Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish
it from the J/B.
Example : Indicates Relay Block No.1
[F]: Junction Block (The number in the circle is the
J/B No. and the connector code is shown beside
it). Junction Blocks are shaded to clearly
separate them from other parts.
3C indicates
that it is inside
Junction Block
No.3 Example:

[G]: Indicates related system.
[H]: Indicates the wiring harness and wiring harness
connector. The wiring harness with male
terminal is shown with arrows (
).
Outside numerals are pin numbers.
Female Male ( )
[I]: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
[J]: Indicates a shielded cable.
[K]: Indicates and located on ground point.
[L]: The same code occuring on the next page
indicates that the wire harness is continuous.

M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
(
Cont . next page)
2 CAMRY CNG
EFI RELAYCIR OPN RELAY
20A EFI
40A AM1 30A AM2
7. 5A OBD
2 1
3 5
2 1
3 5 1J 10 1K22L 41K 5
82J 2K7
11
1B 41B12A12C10 2J 22F4
11 1B 5
L±B
AM2 6
I10
IGNITION SW4 AM1
ST2IG2
2 IG1 ACC
7 2
11K 31K
5A
IGN
4EB1 5EB1
EB Left radiator
s ide s upport 1F 2F 1C
1A
B±G
BATTERY10A
GA UGE
71WB± Y B± Y
1D 2B± Y
FUSIBLE LINK BLOCK10 IF1
FL MAIN
3. 0WBA
100A
AL T
B±Y
1B±R
BB W±R
2
B±R
BR
IG3 9
BR
A
B±R
B±RB
Y
C
LG
Y
B±Y
LG±B
L±W
B±Y
B±Y B±Y
R± L G± R G± R
2
G± R
3
BB±Y W± B M 1
MANIFOLD ABSOLUTE
PRESSURE SENSORT 1
THROTTLE POSITI ON
SENSOR
B±RL±B L±B
L±B G±R
W± R
W
B
IG2 1
B± R F17
FUEL TEMP. SENSOR AND
FUEL SHUTOFF VALVE (
Fuel Tank)
B± R
1
A1 1
A/ C EVAPORATOR
TEMP. SENSOR
ON ML KJI H G
B±R
Y
LG
B± Y
LG±B
L±R
G±R
G±R
B± Y
B
C12
MALFUNCTION
I NDI CA TOR L AMP
[COMB. METER]
7
2 D D
J 3
JUNCTION
CONNECTOR
JUNCTION
CONNECTOR
B±Y
23 31 1
12
R± LB
PIM VCE2
B± R
Power SourceEngine Control
D
E
F
BR
4IB1 BR
3IG2
BR BR
7IB1
LG±B
EA
W±B
L±R
EA BAL±B
B±YB± Y
, F11 F 9 A C , F14 FB J23 J24A,
2C 5
W± B
B±Y L±B
2IG1
BKUnder the left
center pillar B±RB±R
B±Y
B±R
A
J34
JUNCTION
CONNECTOR
W± B
LG±BBR
B± R BR
2IB1
BR4BR

M OVERALL ELECTRICAL WIRING DIAGRAM
9
101112
2 CAMRY CNG (
Cont' d)
ECIntake
manif oldB±YBR BR W± B
BR BR BR
STP 4A
LOCK IN 18 C
PRS 10 D
B±OW± L
MG C 21 AL±Y
A/CS 10 AR±B
LOCK 15 AR± W
NSW 6AB±W
STA 11 AGR
IGT1 20 CB
IGF 3CW±R
IGT2 19 CY±RBR
10 IG3
W± L Fr om Ignit ion Coil
and Igniter
No. 1, No. 2< 1±3>
BRTE1 15 B
NE
1 2
C 2
CRANKSHAFT
POSITION SENSOR
1 2C 1
CA MSHAF T
POSITION SENSORNE ± GE03 E0 2 E01 SPD
E04
Intake
ma n i f o l dECL
B±RBRL B±W
(
Shielded) (
Shielded)BRBR
BR A
AA
A
A J20
JUNCTION
CONNE CTOR
BR BR BR BR
TE1 E1+BL±W
To Tac hometer
[Comb. Met er]
< 17±5>To A/ C Magnetic
Clutch and Loc k
Sens or< 19±4> Fr om A/C Dual
Pressure SW< 19±4>Fr om MG CL T
Relay< 19±2>Fro m A/C SW
< 19±4> Fro m A/C SW
< 19±4> From º STARTERº
Fuse< 1±2>Fr om Park/ Neutral
Posit ion SW< 1±2>12
8 D 1
DA TA LI NK
CONNECTOR 1
3
E1
BR
ENGI NE CONT ROL MODULE
IG3 6
E ngine Control
BR
BR
BR
G L
A 8
AI R FUEL
RA TI O SE NS ORHTA F 2A
AF± 14 B
AF+ 6B 14 23
B±W (
Shielded)
HT AF±+B AF+ A
B
D
EB B±Y
C 16 A 13 C 5 C 17 C 4
BRA16 B 22 C 13 C
JUNCTION
CONNECTORJ23
TACH
A
, E 5 E 4 A B , E 6 C , E 7 D
BRBR CW± B1IG1G G
7IG1
G
9A 8A FA
FA
B±O From Stop Light SW
< 8±4>
V±W Fr om Speedomet er
[Comb. Meter]
< 17±8>G±W
2 1 12 C 2C
I 4
INJECTOR NO. 1
L B±W
(
Shielded)
2 1 11 C 1C
I 5
INJECTOR NO. 2
BR B±R
(
Shielded)
2 1 25 C 15 C
I 6
INJECTOR NO. 3
GR
(
Shielded)
2 1 24 C 14 C
I 7
INJECTOR NO. 4
WO
(
Shielded)
4IG1
IHCowl side
panel RH A AAA
A
W± B W± B
J21
J UNCTI ON CONNECTOR3IG1
BR
26 C
A A
J18
JUNCT I ON
CONNECTOR
BRBR BR
W±B BR
BREO5 #40 #40+ #30 #30+ # 10+ # 10 # 20+ # 20