166
RADIATOR FAN AND AIR CONDITIONER (MANUAL AIR CONDITIONER, FOR PUSH TYPE OF BLOWER CONTROL SW)
1. COOLING FAN OPERATION
WHEN THE IGNITION SW IS TURNED ON, THE CURRENT FROM IGN FUSE FLOWS TO TERMINAL 3 OF RADIATOR FAN RELAY NO. 1
→
TERMINAL 4
→
TERMINAL 3 OF THE A/C PRESSURE SW
→
TERMINAL 2
→
TERMINAL 1 OF WATER TEMP. SW (FOR FANS CONTROL)
→
TERMINAL 2 (5S–FE)
→
GROUND, FROM TERMINAL 2 OF A/C FAN RELAY NO. 2
→
TERMINAL 4
→
TERMINAL 3 OF A/C PRESSURE
SW
→
TERMINAL 2
→
TERMINAL 1 OF WATER TEMP. SW (FOR FANS CONTROL)
→
TERMINAL 2 (5S–FE)
→
GROUND, CAUSING
RELAY NO. 1 AND RELAY NO. 2 OF EACH FAN TO TURN ON.
* OPERATION AT LOW SPEED
WHEN THE A/C SW (A/C CONTROL ASSEMBLY) IS TURNED ON AND THE AIR CONDITIONER OPERATES, THE CURRENT FLOWS
FROM GAUGE FUSE FLOWS TO TERMINAL 2 OF A/C MAGNET CLUTCH RELAY
→
TERMINAL 3
→
TERMINAL 8 OF A/C AMPLIFIER
CAUSING A/C MAGNET CLUTCH RELAY TO TURN ON.
AT THAT TIME, THE CURRENT FROM GAUGE FUSE FLOWS TO TERMINAL 4 OF A/C MAGNET CLUTCH RELAY
→
TERMINAL 1
→
TERMINAL 4 OF A/C MAGNET CLUTCH
→
GROUND, AND FROM TERMINAL 1 OF A/C MAGNET CLUTCH RELAY
→
TERMINAL 2 OF A/C
FAN RELAY NO. 3
→
TERMINAL 3
→
GROUND.
AS A RESULT, A/C MAGNET CLUTCH AND A/C FAN RELAY NO. 3 TURNS ON AND THE CURRENT FLOWS FROM FL CDS FAN
→
TERMINAL 2 OF A/C CONDENSER FAN MOTOR
→
TERMINAL 1
→
TERMINAL 4 OF A/C FAN RELAY NO. 3
→
TERMINAL 1
→
TERMINAL
1 OF A/C FAN RELAY NO. 2
→
TERMINAL 5
→
TERMINAL 2 OF A/C CONDENSOR FAN MOTOR
→
TERMINAL 1
→
GROUND, FLOWING
TO EACH FAN MOTOR IN SERIES, CAUSING THE COOLING FAN TO ROTATE AT LOW SPEED.
* OPERATION AT HIGH SPEED
DURING A/C OPERATION, WHEN THE PRESSURE OF A/C COMPRESSOR BECOMES HIGHER THAN NORMAL PRESSURE (MORE
THAN 14.3 KG/CM
2
1401 KPA, 203 PSI), THE A/C PRESSURE SW TURNS OFF.
AS A RESULT, FAN RELAY NO. 1 AND NO. 2 TURNS OFF AND THE CURRENT FLOWS FROM FL RDI FAN
→
TERMINAL 1 OF RADIATOR
FAN RELAY NO. 1
→
TERMINAL 2
→
TERMINAL 2 OF RADIATOR FAN MOTOR
→
TERMINAL 1
→
GROUND, AND FROM FL CDS FAN
→
TERMINAL 2 OF A/C CONDENSOR FAN MOTOR
→
TERMINAL 1
→
TERMINAL 4 OF A/C FAN RELAY NO. 3
→
TERMINAL 1 TERMINAL 1
OF A/C FAN RELAY NO. 2
→
TERMINAL 3
→
GROUND, FLOWING TO EACH FAN MOTOR IN PARALLEL CAUSING THE
→
COOLING FAN
TO ROTATE AT HIGH SPEED. WHEN THE ENGINE COOLANT TEMPERATURE BECOMES MORE THAN ABOUT 90
°
C (194
°
F), THE
WATER TEMP. SW TURNS OFF AND THE SAME OPERATION AS ABOVE IS PERFORMED.
2. HEATER BLOWER MOTOR OPERATION PUSH TYPE BLOWER CONTROL SW (W/O AUTO A/C)
CURRENT IS APPLIED AT ALL TIMES THROUGH THE HEATER FUSE TO TERMINAL 5 OF HEATER RELAY. WHEN THE IGNITION SW IS
TURNED ON, CURRENT FLOWS THROUGH GAUGE FUSE TO TERMINAL 3 OF HEATER RELAY
→
TERMINAL 1
→
TERMINAL C3 OF
A/C CONTROL ASSEMBLY.
AT THE SAME TIME, CURRENT ALSO FLOWS FROM GAUGE FUSE TO TERMINAL 5 OF A/C BLOWER CONTROL RELAY
→
TERMINAL 7
→
TERMINAL C1 OF A/C CONTROL ASSEMBLY, FROM TERMINAL 5 OF BLOWER CONTROL RELAY
→
TERMINAL 8
→
TERMINAL C8
OF A/C CONTROL ASSEMBLY, AND ALSO FROM TERMINAL 5 OF BLOWER CONTROL ASSEMBLY.
* LOW SPEED OPERATION (OPERATION AT MANUAL)
WHEN THE BLOWER SW (A/C CONTROL ASSEMBLY) IS MOVED TO LOW POSITION, THE CURRENT FLOWING TO TERMINAL C3 OF
A/C CONTROL ASSEMBLY FLOWS TO TERMINAL C10 OF A/C CONTROL ASSEMBLY
→
GROUND AND TURNS THE HEATER RELAY
ON.
THIS CAUSES THE CURRENT FLOWING FROM THE HEATER FUSE TO TERMINAL 5 OF THE HEATER RELAY TO FLOW TO TERMINAL
4 OF HEATER RELAY
→
TERMINAL 4
→
GROUND, CAUSING THE BLOWER MOTOR TO ROTATE AT LOW SPEED.
* HIGH SPEED OPERATION (OPERATION AT MANUAL)
WHEN THE BLOWER SW (A/C CONTROL ASSEMBLY) IS MOVED TO HI POSITION, CURRENT FLOWS FROM TERMINAL C3 OF A/C
CONTROL ASSEMBLY
→
TERMINAL C10 OF A/C CONTROL ASSEMBLY
→
GROUND AND TURNS THE HEATER RELAY ON.
AS A RESULT, THE CURRENT FLOWING TO TERMINAL C1 OF THE A/C CONTROL ASSEMBLY FLOWS TO TERMINAL C10 OF A/C
CONTROL ASSEMBLY
→
GROUND, TURNING THE A/C BLOWER CONTROL RELAY ON.
THIS CASE IS THE CURRENT FLOWING FROM THE HEATER FUSE TO TERMINAL 5 OF THE HEATER RELAY TO FLOW TO TERMINAL 4
OF RELAY
→
TERMINAL 2 OF BLOWER MOTOR
→
TERMINAL 1
→
TERMINAL 4 OF BLOWER CONTROL RELAY
→
TERMINAL 3
→
GROUND, CAUSING THE BLOWER MOTOR TO ROTATE AT HIGH SPEED.
SYSTEM OUTLINE
Summary of Contents for CELICA 1990 All-Trac/4WD
Page 4: ...4 HOW TO USE THIS MANUAL ...
Page 16: ... Body 16 RELAY LOCATIONS Engine Compartment ...
Page 17: ...17 Instrument Panel ...
Page 18: ...18 RELAY LOCATIONS J B No 1 Left Kick Panel See Page 17 ...
Page 19: ...19 J B No 1 Inner Circuit ...
Page 20: ...20 RELAY LOCATIONS J B No 2 Near the Battery See Page 16 ...
Page 21: ...21 J B No 2 Inner Circuit ...
Page 22: ...22 RELAY LOCATIONS J B No 3 Behind Combination Meter See Page 17 J B No 3 Inner Circuit ...
Page 23: ...23 2 R B No 2 Left Kick Panel See Page 17 3 R B No 3 Right Kick Panel See Page 17 ...
Page 49: ...51 ...
Page 60: ...62 ENGINE CONTROL ...
Page 61: ...63 ...
Page 65: ...67 ...
Page 91: ...93 DOOR LOCK ...
Page 101: ...103 UNLOCK AND SEAT BELT WARNING ...
Page 121: ...123 ...
Page 126: ...128 ABS ANTI LOCK BRAKE SYSTEM ...
Page 132: ...134 SRS AIRBAG ...
Page 144: ...147 ...
