Page 1217 of 1807

228
RADIATOR FAN AND AUTOMATIC
1. HEATER BLOWER OPERATION
MANUAL BLOWER OPERATION
WHEN THE BLOWER CONTROL SW IS SET TO ANY BLOWER SPEEDS, THE A/C AMPLIFIER OPERATES AND THE
CURRENT TO DRIVE THE BLOWER MOTOR FLOWS FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI
OF THE BLOWER MOTOR CONTROL RELAY. THE CURRENT ACTIVATES THE RELAY AND THE VOLTAGE APPLIED TO
TERMINAL +B OF THE BLOWER MOTOR CONTROL RELAY IS OUTPUT AT TERMINAL M+ AS THE VOLTAGE FOR THE
SELECTED BLOWER SPEED. THE CURRENT THEN FLOWS FROM TERMINAL M+ OF THE BLOWER MOTOR
CONTROL RELAY TO TERMINAL 2 TERMINAL 1 TERMINAL M- OF THE BLOWER MOTOR CONTROL RELAY
TERMINAL GND GROUND, AND THE BLOWER MOTOR OPERATES AT THE BLOWER SPEED SELECTED.
AUTO FUNCTION
WHEN THE AUTO SW IS TURNED ON, THE A/C AMPLIFIER CALCULATES THE REQUIRED VENT TEMPERATURE BASE
ON THE SET TEMPERATURE AND INPUT FROM EACH SENSOR. THEN TERMINAL BLW OF THE A/C AMPLIFIER
INPUTS CURRENT TO TERMINAL SI OF THE BLOWER MOTOR CONTROL RELAY IN CONFORMITY WITH THE
REQUIRED VENT OUTPUT. THIS CURRENT ACTIVATES THE BLOWER MOTOR CONTROL RELAY SO THAT CURRENT
FLOWS FROM TERMINAL M+ OF THE BLOWER MOTOR CONTROL RELAY TERMINAL 2 OF THE BLOWER MOTOR
TERMINAL 1 TERMINAL M- OF THE BLOWER MOTOR CONTROL RELAY TERMINAL GND GROUND,
ACTIVATING THE BLOWER MOTOR. THE BLOWER MOTOR THEN OPERATES AT DIFFERENT STEPS IN CONFORMITY
WITH VARIABLE CURRENT FLOW OUTPUT FROM TERMINAL BLW OF THE A/C AMPLIFIER TO TERMINAL SI OF HE
BLOWER MOTOR CONTROL RELAY.
2. OPERATION OF AIR INLET CONTROL SERVO MOTOR
(SWITCHING FROM FRESH TO RECIRC)
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF THE AIR INLET
CONTROL SERVO MOTOR TERMINAL 5 TERMINAL AIR OF THE A/C AMPLIFIER TERMINAL GND
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT RECIRC POSITION.
(SWITCHING FROM RECIRC TO FRESH)
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL 2 OF THE AIR INLET
CONTROL SERVO MOTOR TERMINAL 3 TERMINAL AIF OF THE A/C AMPLIFIER TERMINAL GND
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT FRESH POSITION.
3. OPERATION OF AIR VENT MODE CONTROL SERVO MOTOR
WITH THE IGNITION SW TURNED ON, THE CURRENT FLOWS FROM HTR FUSE TO TERMINAL IG OF THE A/C
AMPLIFIER
(SWITCHING FROM DEF TO FACE)
THE CURRENT FROM TERMINAL AOF OF THE A/C AMPLIFIER TERMINAL 1 OF THE AIR VENT MODE CONTROL
SERVO MOTOR TERMINAL 2 TERMINAL AOD OF THE A/C AMPLIFIER TERMINAL GND GROUND. THE
MOTOR ROTATES AND THE DAMPER MOVES TO FACE SIDE. WHEN THE DAMPER OPERATES WITH THE A/C SW AT
FACE POSITION, THE DAMPER POSITION SIGNAL IS INPUT FROM TERMINAL 3 OF THE SERVO MOTOR TO THE
TERMINAL TP0 OF THE A/C AMPLIFIER. AS A RESULT, CURRENT TO THE SERVO MOTOR CIRCUIT IS CUT OFF BY
THE AMPLIFIER, SO THE DAMPER STOPS AT THAT POSITION.
(SWITCHING FROM FACE TO DEF)
THE CURRENT FLOWS FROM TERMINAL AOD OF THE A/C AMPLIFIER TERMINAL 2 OF THE AIR VENT MODE
CONTROL SERVO MOTOR TERMINAL 1 TERMINAL AOF OF THA A/C AMPLIFIER TERMINAL GND
GROUND, THE MOTOR ROTATES AND THE DAMPER STOPS AT THAT POSITION.
4. OPERATION OF AIR MIX CONTROL SERVO MOTOR
WHEN THE TEMPERATURE SW IS TURNED TO THE COOLº SIDE, THE CURRENT FLOWS FROM TERMINAL AMC OF
THE A/C AMPLIFIER TERMINAL 1 OF THE AIR MIX CONTROL SERVO MOTOR MOTOR TERMINAL 2
TERMINAL AMH OF THE A/C AMPLIFIER TERMINAL GND GROUND AND THE MOTOR ROTATES. THE
DAMPER OPENING ANGLE AT THIS TIME IS INPUT FROM TERMINAL 3 OF 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 IS TURNED TO THE WARMº SIDE, THE CURRENT FLOWS FROM
TERMINAL AMH OF THE A/C AMPLIFIER TERMINAL 2 OF THE AIR MIX CONTROL SERVO MOTOR MOTOR
TERMINAL 1 TERMINAL AMC OF THE A/C AMPLIFIER, ROTATING THE MOTOR IN REVERSE AND SWITCHING
THE DAMPER FROM COOL TO WARM SIDE.
SYSTEM OUTLINE
Page 1218 of 1807

229
AIR CONDITIONING
5. AIR CONDITIONING OPERATION
THE A/C AMPLIFIER RECEIVES VARIOUS SIGNALS, I.E., THE ENGINE RPM FROM THE IGNITER, OUTLET
TEMPERATURE SIGNAL FROM THE A/C THERMISTOR, COOLANT TEMPERATURE FROM THE ENGINE COOLANT
TEMP. SENSOR AND THE LOCK SIGNAL FROM THE A/C COMPRESSOR, ETC.
WHEN THE ENGINE IS STARTED AND THE A/C SW (HEATER CONTROL SW) IS ON, A SIGNAL IS INPUT TO THE A/C
AMPLIFIER. AS A RESULT, THE GROUND CIRCUIT IN A/C AMPLIFIER IS CLOSED AND CURRENT FLOWS FROM HTR
FUSE TO TERMINAL 1 OF THE A/C MAGNETIC CLUTCH RELAY TERMINAL 2 TERMINAL ACMG OF THE ENGINE
CONTROL MODULE TERMINAL A/C TERMINAL MGC OF THE A/C AMPLIFIER TERMINAL GND
GROUND, TURNING THE RELAY ON, SO THAT THE A/C MAGNETIC CLUTCH IS ON AND THE A/C AMPLIFIER
OPERATES.
AT THE SAME TIME, THE ENGINE CONTROL MODULE DETECTS THE MAGNETIC CLUTCH IS ON AND THE A/C
AMPLIFIER IS OPERATING AND OPENS DIRECTION TO AVOID LOWERING THE ENGINE RPM DURING A/C
OPERATING.
WHEN ANY OF THE FOLLOWING SIGNALS ARE INPUT TO THE A/C AMPLIFIER, THE A/C AMPLIFIER OPERATES TO
TURN OFF THE AIR CONDITIONING.
*ENGINE RPM SIGNAL IS HIGH.
*COOLANT TEMP. SIGNAL IS HIGH.
*A SIGNAL THAT THE TEMPERATURE AT THE AIR OUTLET IS LOW.
*A SIGNAL THAT THERE IS A LARGE DIFFERENCE BETWEEN ENGINE SPEED AND COMPRESSOR SPEED.
*A SIGNAL THAT THE REFRIGERANT PRESSURE IS ABNORMALLY HIGH OR LOW.
Page 1219 of 1807
E 9
E 9
E 2 22
22 22265 12
3
52 31
23 41531 42
22 22
1 2 4
21 IK1 3IK12EA1 1
IK1 1 IB4 1
IF15
IF313 IB23
EB IGA 2A3
B 2B1A1 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
R- L
R- L
R- L
R- L
R- LR- L
W- G
L- W
L
L
II1 10
LL L- W
L L- W
L
R- L B
R- L R- L L- R
L- W W- B
L- R L- R
L B
BR
W- B W- B
L
R- L
L- BL W- B
W- BW- BL- R W- R LL
W- G
R- L 22 11
(
*1) (
*1)
(
*1)
50A
HTR30A
FAN
RADIATOR FAN
RELAY NO. 2
RADIATOR FAN
RELAY NO. 1
HEATER
RELAY
A/C MAGNETIC
CLUTCH RELAY
A/C SINGLE
PRESSURE SW A/C MAGNETIC
CLUTCH A 4
ENGINE COOLANT
TEMP. SW E 5
B 3
BLOWER MOTOR +B SI
M+ M- GNDBLOWER MOTOR
CONTROL RELAYB B 4 , B 5AE 9 : * 1
E21 : * 2
E11 : * 1
E26 : * 2R 2
R 3
A 3
A 2
A 3 A
EA E 5
W- B
L- B
W- B W- B W- B
7. 5A
HTR
1A 51K2
M
230
RADIATOR FAN AND AUTOMATIC
Page 1220 of 1807
E 2
E 2 1 2
1 2
EBA AI25
B 9B13 C7B15 B6C21 B 16II1 31 II129
IHEA1 2
L- B
L- BL- B
L- B W- B W- B
W- BRADIATOR FAN MOTOR NO. 2 R20
A/C CONDENSER FAN MOTOR A 2
R- L
W- G
L- W
L
LW- B
R- L
B- W
W- G
L- R
B- W B- WL- R L- WL L W- B
W- B W- B
W- B W- B W- B
W- G23 34 16
4
A(
*2) ENGINE CONTROL MODULE E10
IGNITER I 4
JUNCTION
CONNECTOR J 1A/C AMPLIFIERA A12 , A13
C GND VER 1 A/ C- I N BLW HR MGC IGNEXT
(
*1)
B , A14 E 2
1 2
RADIATOR FAN MOTOR NO. 1 R 1
L- B L- B
L- B W- B
MMM
ACMGA/ C(
*1)
AC(
*2)
TACO
231
AIR CONDITIONING* 1 : 2JZ- GTE
* 2 : 2JZ- GE
Page 1221 of 1807
IG1 16 IG113 IG115 IG114 IF1 10
I25
I25
B 8B19 B20 B17 C16 C4C10 C11 C1C2 A 1A6A18 A5B6B3B4 A 9 W- B
R- L
R- L
R- L
R- L
G- R
G
GR G- R
G
GRR- L R- L R- L
R- L
V
R- Y
BR
Y
BR- W
GW- B
2 534
R- L
IG AIR AIF AIM/AMOUT L- RDEF
L- DEFL- F/D
L- FOOTL- B/ L
L- FACE AIR INLET CONTROL SERVO MOTOR A24HEATER CONTROL SWB H12 , H13A
A/C AMPLIFIERA A12 , A13
CRR-
DEFOG DEF F/ D FOOT B/ L FACE
B , A14
MRECIRC
FRESH
232
RADIATOR FAN AND AUTOMATIC
Page 1222 of 1807
C 6C17 C18 C19 C12 C15 C14 C3C13 B1B4B3B2A8A10 4 A9B11 B 12 B11 A7A15 3 A4A14 A17 A12 A16 B1B10 B9A13 B2B7A11 A2A10
I12
R- B
LG- B
GR
B
LG
P
B- W
P- B
R
LG- R
W- L
R- W
G- W
L- R
Y- B
P- B
L- W
L- B
BR- W L- W
BR- W
L- W A
A
L- MAUTO
L- RECL- FRS
L- A/CL- HI L- M3 L- M2 L- M1 L- L0 SW7 SW6 SW5 SW4 SW3 SW2 SW1 SG TSET
A/C AMPLIFIERA A12 , A13C AUTOREC/
FRS A/C FAND- FAND+ OFF
WARM COOL HEATER CONTROL SWB H12 , H13A
B , A14
233
AIR CONDITIONING* 1 : 2JZ- GTE
* 2 : 2JZ- GE
Page 1223 of 1807
I12 I12I13
I13 I13 I13
I19 I14 I12 2 1
2 1
2 1 2 1
2 1 IB6 11 IB63II120
II1 26 IF3 7IF38
IG1 6IG13IG17IG11 IG1 11 IG1 4IG15 2 1
A 2A17 A5A6C22 B10 A7C8C9 A 16BR- W
V- W V- W BR- W
V- W BR- W BR- W
BR- W
L- W L- W L- W L- W
BR- W
Y- G
GR- R L- W BR- W
L- W
V- W
G
L- W
L- W
LG
V- W L- Y
Y- L
WV- W LG- R LG- R
W Y- L L- YLG G- Y G- YG GR - RY- G BR- W
L- W G
L- W
L- W
G- YG- Y L- W
V- W
LG
BR- W
Y- L
W
534 2 1
G
V- W (
*1)
S5 TS TR TA M LOCK- I N TPO TE AOD AOFTW
A /C ROOM
TEMP. SENSOR A16 A/C SOLAR SENSOR A17
A/C AMBIENT
TEMP. SENSOR A 1
A/C LOCK SENSOR
[A/C MAGNETIC CLUTCH] A 4
AIR VENT MODE
CONTROL SE RVO MOTOR A26
A/C EVAPORATOR
TEMP. SENSOR A15
ENGINE COOLANT
TEMP. SENSOR
(
A/C SYSTEM) E11
A/C AMPLI FIERA A12 , A13C
L- W
B , A14
L- W (
*2)
M DEF
FACE
234
RADIATOR FAN AND AUTOMATIC
Page 1224 of 1807
44 52 3144I14 I14
I14
IG 1 8IG19IG12IF18IF36II1 8II123
A 18 A3A1B7C20 B18 A11 A14II12
IB6 12
EA V- WY Y
Y
L- R L- R
L- Y
W- R
L- R
Y
Y
Y
Y R
Y L- R Y BR- W
G- W
V- W
V
R- Y G- W
V
R- Y G- W
V
R- Y
W- R
L- R
O
P
L- Y L- YP
L- R
W- B
4352 1
65 3 121
W- L B
TP AMH AMC +B ACC RDEFGR SPEED PSW AIR MIX CONTROL
SERVO MOTOR
SPEEDOMETER
[COMB. METER]
A25
TELLTALE LIGHT RH T 6
VEHICLE SPEED SENSOR NO. 1
(
COMBINATION METER) V10 A/C DUAL PRESSURE SW
ODO AND
TRIP
A/ C AMPLI FIERA A12 , A13C
O
REAR WINDOW
DEFOGGER RELAY
IF A 9
A 11 B11A 10
A 4
B 1B 2A 1
(
*1) (
*1)
(
*2)
(
*2)
B A 3 , AB C10 , C12A
B , A14
BRBR
R
10A
ECU- B15A
CIG10A
GAUGE
1E 13 1E21H121E12 FROM POWER SOURCE SYSTEM (
SEE PAGE 56)
M
WARM
COOL
235
AIR CONDITIONING* 1 : 2JZ- GTE
* 2 : 2JZ- GE