TOYOTA CAMRY 1999 Service Repair Manual

COMBINATION METER

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1132
12312
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B
(Hint : See Page 7)
J24 J28 J29
GRAY GRAY GRAYP3BLACK
BLACK BLACK (5S±FE) GRAY(Hint : See Page 7)(Hint : See Page 7)
(Hint : See Page 7)J30 O1 P1 R7
V2 W1 W3
GRAYJ11BLACK BLACK
GRAY (Hint : See Page 7)(Hint : See Page 7)
(Hint : See Page 7)
(Hint : See Page 7)
(Hint : See Page 7)J8 (B) J15 J16
J21
1 (1MZ±FE) DARK GRAY
W3

MEMO

RADIATOR FAN AND CONDENSER FAN
40A
AM130A
CDS
15A
ECU±IG
1A 61K 1
15 2311
1115 23
4 11
111 13 4252K 6
2B 22F423 14
2F 22G1 30A
RDI
2 3
1 21 1 2
E 4 E 32C 12G 72C22H2
1B 11K 2
EA1 1IK1 5 IK2 7
II1 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 L
B±WL±Y
L L±Y
L
W± B
W± BW±B
W±BB±R W±RB±R G±W
(
1 MZ± FE) (
1 MZ± FE)L
(
1MZ±FE)
(
1MZ± FE) (
1 MZ± FE)
(
5S±FE)
(
1 MZ± FE)
(
5S±FE)
21
2
1
A 3
A/C SINGLE
PRESSURE SW W 4
WAT ER TEMP.
SW NO. 1
D 3
DIODE
(
A/C) R 1
RADIATOR
FAN MOTOR
WATER
TEMP. SW NO. 2 W 5
A/C CONDENSER
FAN MOTOR A 1FUSIBLE LINK
BL OC KIGNITION SW I16
FAN
NO. 1
RELAY
ENGINE
MAIN
RELAY
FROM MG CLT
RELAY
FA N
NO. 3
RELAY
FAN NO. 2 RELAY
BATTERY 100A
AL T
FL MAI N
3. 0W
MGC
(
1MZ±FE) 24AM1ACC
IG1
1 22 1
2J 13
II2 1
G±W G±W
CF
(
1MZ±FE) (
1MZ±FE)
E 29 D F 4
A, F 7
F 9 F
* 1 : AUTOMA TI C A/ C
* 2 : MANUAL A/C
E11
ENGINE CONTROL
MODULEE ,
A12
A/C AMPLIFIERA
A34
A/C CONTROL
AS SE MB LYB
A 12(
*2) B 2(
*1)M M

FAN MOTOR OPERATION (1MZ±FE)
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) and FAN NO.3 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
Only when the A/C system is activated or the water temp. SW No.2 is turned on, 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 ECU±IG fuse flows to the FAN NO.3 relay (Coil side) to TERMINAL 1 of
the diode (A/C) to TERMINAL 2 to TERMINAL (A)12 of the A/C amplifier (Manual A/C) or (B) 2 of the A/C control assembly
(Automatic A/C) 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. As this flowing in
series for the motors, the motors rotate at low speed.
When the water temp. SW No.2 is turned on, the current from ECU±IG fuse flows to the FAN NO.3 relay (Coil side) to
TERMINAL 1 of the water temp. SW No.2 to GROUND, causing the FAN NO.3 relay to turn on. As a result, the current
through the CDS fuse flows the same route as above, rotating the motors at low speed.
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, 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.
As the current flowing in parallel for the motors as above, the motors rotate at high speed.
FAN MOTOR OPERATION (5S±FE)
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. As this flowing in series
for the motors, the motors rotate at low speed.
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, 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.
As the current flowing in parallel for the motors as above, the motors rotate at high speed.
A3 A/C SINGLE PRESSURE SW
3±2 : Open above approx. 15.5 kgf/cm2
(224 psi, 1520 kpa)
Closed below approx. 12.5 kgf/cm2 (181 psi, 1225 kpa)
W4 WATER TEMP. SW NO.1
2±1 : Open above approx. 95°C (203° F)
W5 WATER TEMP. SW NO.2 (1MZ±FE)
1±GROUND : Closed above approx. 90°C (194°F)
SYSTEM OUTLINE
SERVICE HINTS

RADIATOR FAN AND CONDENSER FAN
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A126 (1MZ±FE)E11E30I1630A128 (5S±FE)F4A26 (1MZ±FE)R127 (1MZ±FE)
A326 (1MZ±FE)F4A28 (5S±FE)R129 (5S±FE)A328 (5S±FE)F7D26 (1MZ±FE)W427 (1MZ±FE)
A12A30F7D28 (5S±FE)W429 (5S±FE)
A34B30F9F26 (1MZ±FE)W527 (1MZ±FE)
D326 (1MZ±FE)F9F28 (5S±FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
124Engine Room R/B No.1 (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A
1B20Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K
()
2B
2C
2F22Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2G
gg(g)
2H
2J22Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2K22Cowl 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)
EA136 (1MZ±FE)Engine Room Main Wire and Engine Room Main No 3 Wire (Radiator LH)EA138 (5S±FE)Engine Room Main Wire and Engine Room Main No.3 Wire (Radiator LH)
II142Engine Wire and Cowl Wire (Under the Blower Motor)II242Engine Wire and Cowl Wire (Under the Blower Motor)
IK142Engine Room Main Wire and Cowl Wire (Right Kick Panel)IK242Engine Room Main Wire and Cowl Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EB36 (1MZ±FE)Left Radiator Side SupportEB38 (5S±FE)Left Radiator Side Support
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E336 (1MZ±FE)Cowl WireE436 (1MZ±FE)Engine Room Main WireE338 (5S±FE)Cowl WireE438 (5S±FE)Engine Room Main Wire

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1
1
12X2
4
X


2 1
12
121















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29









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XX
XX
GRAY BLACK ORANGE
ORANGE (* 1) BLACK (1MZ±FE California)
F4 (A)
F7 (D)
ORANGEI16GRAY (1MZ±FE) GRAY
(5S±FE) GRAY* 1 : 1MZ±FE Except California
A1 A3 A12 (A)
D3 E11 (E) E11 (E)
F9 (F) R1 W4
W4 W5A34 (B)

AIR CONDITIONING (AUTOMATIC A/C)
23 41510A
HEATER FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1W 2
6 2
IG FUS IBL E
LINK BLOCK10A
ECU±B
2J 7
L±B
HTR
RELAY
A/C BLOWER MOTOR
LINEAR CONTROLLER A33
50A HTR
1F 8
1R 3
11111
EB23 15
MG CLT
RELAY
11 11
I 8 2K 5
2C 91W 3
1V 10
21
EB2 1
I 73 L±B L±B
L±R L±R B±W
AA A4
2
B±W
L±B W±B
W±B
W±B W±R
L±B
L±B
L±B
W± R W±R
L±B
L±W
L±W
B±W
L±R
L±W W± B
L±R
B±W
B±W B±W
W±B
L±W
1
W±B W±B
W±B
W±B
L±B W± B
W±B
W±B JUNCTION
CONNECTOR J11 BLOWER MOTOR B 3
BLOWER RESISTOR
(
LOW SPEED) B 8
B±WA A
AJUNCTION
CONNECTOR J32
+B
VM
SI
GND
IIA
W± B
I 7W±B M

A/C CONTROL ASSEMBLY
1
4 2 415 6
AIR INLET CONTROL
SERVO MOTOR A38
A 2
A/C MAGNETIC CLUTCH
AND LOCK SENSORM5 4 3 2 1
6
7
L±OB±L L±RL L±W
DEF F/ D FOOT B/L FACE
IG
GNDAIR VENT MODE
CONTROL SERVO MOTOR A20
A
B CONTROL
CIRCUIT IK2 7A 20 A 19 A 18 A 17 A 4 B 7 A 6 B 9 B 16 A 3 A 10 B 2 A 26 A 13
L±OB±L L±RL L±W P±L L±YL±B L±B L±B W± BW± L L±WL±Y
L±B W± R
IK2 9
L±W
L±W
B±W
B±W
W± B
L±B
W± B W± BL±B
W± R
W±B W± B
W±R W±L W±LDIODE (
A/C) D 3
L±Y
2
3
B±W B±W
EB1 2 B IG+ MGCR HR LOCK BLW PSW AIF TPI FACE B/L FOOT F/D DEF
A 15
V± W
SPD
TO SPEEDOMETER
[COMB. METER]
A 7 A 23
3 7 Y± G
W± R L±B
RL FROM DEFOGGER RELAY
RDFG
AIR
M
1
W±R
L
A/C DUAL
PRESSURE
SW A 3 IK2 11B A34 A , A35

AIR CONDITIONING (AUTOMATIC A/C)
A/C CONTROL A SS EMBLY
1 2
M3 4 1 2
B±YL P G± R
A/C SOLAR SENSOR A37
AIR MIX CONTROL SERVO MOTOR A39
WARM COOL
A/C ROOM TEMP. SENSOR
A/C EVAPORATOR TEMP. SENSORA36
A13
1 2
2 1
1 2
A/C AMBIENT TEMP. SENSOR A30
IK3 4
IK2 10IK1 1A 14 B 14 B 10 B 13 A 16 B 3 B 6 B 4 A 1 B 5 B 8 A 11 A 8 A 9
A FB D IG1 1
IG1 2
W B±YL P G±R
W LL
W±R
G± Y
L±W
Y
B±O
B±Y
LG±B
V
W± B V LG±BB±Y B±OW± R W± R W± R W± R
W±RY
JUNCTION CONNECTOR
W±R
W± BAMH AMC S5 TP TS SG TR TE TAM IGN AC1 ACT TW GND
TACH ACT THWO
W±R L L
5
W±R W±R
27 25 13 14 W±RL
ENGINE CONTROL MODULE E 8A/C B A34 A , A35
B J27 A , J28
F F
F F A A
AA
W±R
W±R JUNCTION
CONNECTOR J29
JUNCTION
CONNECTOR J 1
W± R
I10 W± R
I 9

1. HEATER BLOWER MOTOR OPERATION
Current is applied at all times through HTR fuse to TERMINAL 1 of the HTR relay. When the ignition SW is turned on,
current flows through the HEATER fuse to TERMINAL 5 of the HTR relay to TERMINAL 3 to TERMINAL HR of the A/C
control assembly. At the same time, current also flows from HEATER fuse to TERMINAL IG+ of the A/C control assembly.
*Low speed operation
When the blower SW (A/C control assembly) is pushed to LOW SPEED position, the current to TERMINAL HR of the
A/C control assembly flows to TERMINAL GND of the A/C control assembly to GROUND and turns the HTR relay on.
As a result, the current to TERMINAL 1 of the HTR relay flows to TERMINAL 2 of the relay to TERMINAL 2 of the
blower motor to TERMINAL 1 to TERMINAL 2 of the blower resistor to TERMINAL 6 to GROUND and causes the
blower motor to rotate at low speed.
*High speed operation
When the blower SW (A/C control assembly) is pushed to HIGH SPEED position, the current to TERMINAL HR of the
A/C control assembly flows to TERMINAL GND of the A/C control assembly to GROUND and turns the HTR relay on.
As a result, the current to TERMINAL 1 of the HTR relay flows to TERMINAL 2 to TERMINAL 2 of the blower motor to
TERMINAL 1 to TERMINAL 4 of the A/C blower motor linear controller to TERMINAL 2 to TERMINAL BLW of the A/C
control assembly (Which is activated when the blower SW is pushed to high speed position) to TERMINAL GND to
GROUND without passing through the blower resistor, causing the blower motor to rotate at high speed.
2. AIR INLET CONTROL SERVO MOTOR OPERATION
(Switching from FRESH to RECIRC)
With the ignition SW turned on, the current flows from HEATER fuse to TERMINAL IG+ of the A/C control assembly to
TERMINAL AIR to TERMINAL 7 of the air inlet control servo motor to TERMINAL 6 to TERMINAL AIF of the A/C control
assembly to TERMINAL GND to GROUND, the motor rotates and the damper moves to the RECIRC side. when the
damper operates with the A/C SW at RECIRC position, the damper position signal is input from TERMINAL 5 of the servo
motor to TERMINAL TPI of the A/C control assembly. As a result, current to the servo motor circuit is cut off by the A/C
control assembly, so the damper stops at that position.
(Switching from RECIRC to FRESH)
With the ignition SW turned on, when the RECIRC/FRESH SW is switched to the FRESH side, the current flows from
TERMINAL IG+ of the A/C control assembly to TERMINAL AIF to TERMINAL 6 of the air inlet control servo motor to
TERMINAL 7 to TERMINAL AIR of the A/C control assembly to TERMINAL GND to GROUND, The motor rotates and the
damper stops at that position.
3. AIR VENT MODE CONTROL SERVO MOTOR OPERATION
When the ignition SW turned on, the current flows from HEATER fuse to TERMINAL IG+ of the A/C control assembly.
(Switching from DEF to FACE)
The current flows from TERMINAL FACE of the A/C control assembly to TERMINAL 1 of the air vent mode control servo
motor to TERMINAL 5 to TERMINAL DEF of the A/C control assembly to TERMINAL GND to GROUND. The motor rotates
and the damper moves to the FACE side. When the damper operates with the A/C SW at FACE position, the damper
position signal is input from TERMINAL 5 of the servo motor to the TERMINAL DEF of the A/C control assembly. As a
result, current to the servo motor circuit is cut off by the A/C control assembly, so the damper stops at that position.
(Switching from FACE to DEF)
The current flows from TERMINAL DEF of the A/C control assembly to TERMINAL 5 of the air vent control servo motor to
TERMINAL 1 to TERMINAL FACE of the A/C control assembly to TERMINAL GND to GROUND, the motor rotates and the
damper stops at that position.
4. AIR MIX CONTROL SERVO MOTOR OPERATION
When the temperature control SW (A/C control assembly) is turned to the ºCOOLº side the current flows from TERMINAL
AMC of the A/C control assembly to TERMINAL 1 of the air mix control servo motor to motor to TERMINAL 2 to
TERMINAL AMH of the A/C control assembly to GROUND and the motor rotates. The damper opening angle at this time
is input from TERMINAL 3 of the servo motor to TERMINAL TP of the A/C control assembly, this is used to determine the
DAMPER STOP position and maintain the set temperature.
When the temperature control SW (A/C control assembly) is turned to the ºHOTº side, the current flows from servo motor
to TERMINAL AMH of the A/C control assembly to TERMINAL 2 of the air mix control servo motor to motor to TERMINAL
1 to TERMINAL AMC of the A/C control assembly, rotating the motor in reverse and switching the damper from ºCOOLº to
ºHOTº side.
SYSTEM OUTLINE