TOYOTA CAMRY 1999 Service Repair Manual

RADIATOR FAN AND CONDENSER FAN
40A
AM130A
CDS
1A 61K 1
15 2311
1115 23
4 11
111 13 4252K 6
2B 22F423 14
2F 22G1 30A
RDI
2 3
1 21 2
E 2 E 32C 12G72C22H2
1B 11K 2
EA1 1
EA1 2 F 1F2D1
A 1
EB1 2
B±G B±R
B±R
B±R
W±B W±BB±R W
B±Y B±R
L G± W
W±BL±W L±W W±B
W±BR G±W
B±R L
B±R B±W
W± BW±B
W± BW±RB±R G±W1
2
A 3
A/C SINGLE
PRESSURE SW W 4
WAT ER TEMP.
SW NO. 1
R 1
RADIATOR
FAN MOTOR
A/C CONDENSER
FAN MOTOR A 1
FUSIBLE LINK
BLOCKIGNITION SW I10
FAN
NO. 1
RELAY
ENGINE
MAIN
RELAY
FROM MG CLT
RELAY
FAN
NO. 3
RELAY
FAN NO. 2 RELAY
BATTERY 100A
ALT
FL MAIN
3. 0WF F14F12 , A F 9 D 24AM1ACC
IG1
1 22 1
, 15A
ECU±IG
W±B
M M

FAN MOTOR OPERATION
With the ignition SW turned on, the current through the ECU±IG fuse flows to the FAN NO.1 relay (Coil side), FAN NO.2 relay
(Coil side). furthermore, the current through the FAN NO.1 relay (Coil side) or the FAN NO.2 relay (Coil side) flows to
TERMINAL 3 of the A/C single pressure SW to TERMINAL 2 to TERMINAL 2 of the water temp. SW no.1 to TERMINAL 1 to
GROUND, causing the FAN NO.1 relay to turn off and the FAN NO.2 relay to turn on.
1. LOW SPEED OPERATION
When the ignition SW is turned on and the A/C system is activated, the A/C condenser fan motor and the radiator fan motor
rotates at low speed.
When the A/C system is activated, the current from MG CLT relay flows to the FAN NO.3 relay (Coil side) to GROUND,
causing the FAN NO.3 relay to turn on. As a result, the current through the CDS fuse flows to TERMINAL 2 of the A/C
condenser fan motor to TERMINAL 1 to TERMINAL 3 of the FAN NO.2 relay to TERMINAL 5 to TERMINAL 5 of the FAN
NO.3 relay to TERMINAL 3 to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to GROUND.
2. HIGH SPEED OPERATION
Only when the A/C single pressure SW is turned off or the water temp. SW no.1 is turned off, the A/C condenser fan motor
and the radiator fan motor rotate at high speed.
When the A/C single pressure SW is turned off or the water temp. SW no.1 is turned off. the current from the RDI fuse flows
to the FAN NO.1 relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to GROUND. At the same time,
the current from the CDS fuse flows to TERMINAL 2 of the A/C condenser fan motor to TERMINAL 1 to TERMINAL 3 of the
FAN NO.2 relay to TERMINAL 4 to GROUND.
A3 A/C SINGLE PRESSURE SW
3±2 : Open above approx. 15.5 kgf/cm2
(220 psi, 1520 kpa)
Closed below approx. 12.5 kgf/cm2 (177 psi, 1225 kpa)
W4 WATER TEMP. SW NO.1
2±1 : Open above approx. 95°C (203° F)
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A128F12D28R129
A328F14F28W429
F9A28I1030
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
126Engine Room R/B No.1 (Engine Compartment Left)
: 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)
1K
()
2B
2C
2F24Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2G
gg(g)
2H
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)
SYSTEM OUTLINE
SERVICE HINTS

RADIATOR FAN AND CONDENSER FAN
: GROUND POINTS
CodeSee PageGround Points Location
EB34Left Radiator Side Support
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E234Engine Room Main WireE334Cowl Wire

MEMO

AIR CONDITIONING
1 1
11 1
12
3584
IF EB215
4
23
1 HI M2 M11W 2
I 6L±B
B±W
L±B
B±WL±W W±B
W±BL±R W±B
L±W
10A
HEATER
1
HTR
RELAY
BLOWER RESISTOR
BLOWER
MOTOR
B±W
L±B
L±O
BLOWER SWOFF FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
LO B 2B 3
B 412
1 1 EB131R 3
2C 92K 5
23 1511
11A
AAA
3
JUNCTION
CONNECTOR J 9JUNCTION
CONNECTOR J30 FUSIBLE
LINK BLOCK F13
L±R
L±B L±B
L±B L±B
B±WL±Y B±W
L±B
L±B L±B
L±RTO FAN NO. 3 RELAY MG CLT
RELAY
10A A/C
EB2 1EB12
L±R
W±B
L±B
W± B
W±BL±B W±BL±RL±Y B±WL±B
W±B
50A HTR
A
I 3 W±B 61 M

M
CONTROL
CIRCUIT
AIR VENT MODE CONTROL SERVO MOTOR A15IJ27 4 5 6 7 8 1 2 3
DD
12345
25 1
6
7D
A/C SW A12 JUNCTION
CONNECTOR J12 L±B
B±W
L±R
W± B
L±B
W± B
L±OB±L L±RL L±W W±BR±BL±R
GND FACE B/L FOOT F/D DEFDEF F/D
FOOT B/L FACE HEATER CONTROL SW H 7
L±Y B±WL±B
R±B
R±B
R±W
R±BL±R
OFF
ON DEF F/ D FOOT B/L FACE
IG
GNDL±R L±YL±Y
B A

AIR CONDITIONING
A/C EVAPORATOR
TEMP. SENSOR A11
EC IG2 3 IG2 1IG3 6 IG3 10IJ2 9IJ210
C 18 B 9 B 10 A 10 A21 D10 A 151
4
IJ2 2
B
A2 1
B4
A A/C MAGNETIC
CLUTCH AND
LOCK SENSOR A 2
A/C DUAL
PRESSURE SW A 3
ENGINE CONTROL MODULE L±B
B±W
G
B±W
R±B
R±B
R±W1
2
L±W
BR L±R
BR
W±L
LOCK PRSMGC A/CS THR E2 LOCK IN
BR BRW±L
BRW± L
BR R±B
L±Y
GB E 4 A , E 5 C, E 6 IG1 1B B
JUNCTION
CONNECTOR J 7
JUNCTION
CONNECTOR J20 BJUNCTION
CONNECTOR J12
G
L±Y
BR
D , E 7

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

AIR CONDITIONING
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1R22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1W22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2C24Engine Room Main 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)
EB134Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No 2)EB234Cowl Wire and Engine Room Main Wire (Under the Engine Room J/B No.2)
IG1
IG238Engine Wire and Cowl Wire (Under the Blower Motor)
IG3
g()
IJ238Engine Room Main Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EB34Left Radiator Side Support
EC34Intake Manifold
IF36Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
I338Cowl WireI638Cowl Wire

MEMO