2001 TOYOTA HIGHLANDER Service Repair Manual

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Page 665 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
306
Manual Air Conditioning
Y
B 2IL2 12
4A 54F 7 A 9
P 5G
BR
MPX+ MPX-
B 8B7B1B9B6
IL2 15 IL24IL213 IL23IL211
M 5 4123
V
G
B
BR
R GB WL LG
AOF AOD SG- 4 S5- 4 TPO
A153J 123E

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TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
307
B 29B 2
1B C2323 15 2A8
IK27
2C 22E3
IK3 18 IL2 1
EB2 9
IK3 2
EH A4 1
EE EDA A2 13
A 2
A 3
J 7
J 2B- R Y
SB GR
O
B- YY- G
Y- G
MG CLT
Relay
MPX2
L
W- L G W- B
BR BR BR
(

Page 667 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
308
Manual Air Conditioning
1. Heater Blower Motor Operation
Current is applied at all times through the HTR fuse to TERMINAL 1 of the HEATER relay.
When the ignition SW is t

2005 HIGHLANDER (EWD592U)
308
Manual Air Conditioning
1. Heater Blower Motor Operation
Current is applied at all times through the HTR fuse to TERMINAL 1 of the HEATER relay.
When the ignition SW is turned on, current flows through the HEATER fuse to TERMINAL 3 of the HEATER relay to
TERMINAL 5 to TERMINAL 8 of the blower control SW.
*Low speed operation
When the blower SW is moved to LO position, the current to TERMINAL 8 of the blower control SW flows to TERMINAL
1 to GROUND, causing the HEATER relay is turned on. This causes the current to flow from the HTR fuse to TERMINAL
1 of the HEATER relay to TERMINAL 2 to TERMINAL 2 of the blower motor to TERMINAL 1 to TERMINAL 1 of the
blower resistor to TERMINAL 4 to GROUND, causing the blower motor to rotate at low speed.
*Medium speed operation (Operation at M1, M2)
When the blower SW is moved to M1 position, the current to TERMINAL 8 of the blower control SW flows to TERMINAL
1 to GROUND, turns the HEATER relay on. This causes the current to flow from the HTR fuse to TERMINAL 1 of the
HEATER relay to TERMINAL 2 to TERMINAL 2 of the blower motor to TERMINAL 1 to TERMINAL 1 of the blower
resistor to TERMINAL 2 to TERMINAL 6 of the blower control SW to TERMINAL 1 to GROUND. At this time, the blower
resistance of the blower resistor is less than at low speed, so the blower motor rotates at medium low speed.
When the blower control SW is moved to M2 position, current flowing through the motor flows from TERMINAL 1 of the
blower resistor to TERMINAL 3 to TERMINAL 5 of the blower control SW to TERMINAL 1 to GROUND. At this time,
resistance of the blower resistor is less than at M1 position, so the blower motor rotates at medium high speed.
*High speed operation
When the blower SW is moved to HI position, the current flows to TERMINAL 8 of the blower control SW to TERMINAL
1 to GROUND and turns the HEATER relay on.
This causes the current to flow from the HTR fuse to TERMINAL 1 of the HEATER relay to TERMINAL 2 to TERMINAL 2
of the blower motor to TERMINAL 1 to TERMINAL 4 of the blower control SW to TERMINAL 1 to GROUND, causing the
blower motor to rotate at high speed.
2. Air Conditioning Operation
If the A/C control SW is turned on when the blower SW is set to on, A/C operation starts. However, when the mode SW is at
DEF or FOOT/DEF position, forcibly the air intake is set to FRESH mode and the A/C operates.
A3 Pressure SW
1-4 : Open with the pressure less than 2.0 kgf/cm2 (28 psi, 196 kpa) or above 32 kgf/cm2 (455 psi, 3138 kpa)
A10 (A) A/C Control Assembly
(A) 11-Ground : Always continuity
(A) 2-Ground : Approx. 12 volts with the ignition SW at ON position
(A)12-Ground : Always approx. 12 volts
(A)13-Ground : Approx. 12 volts with the ignitino SW at ACC or ON position
B8 Blower Resistor
1-3 : Approx. 0.22 W
1-2 : Approx. 0.69 W
1-4 : Approx. 1.69 W
B5 Blower Control SW
8-1 : Continuity with the blower SW at LO, M1, M2 or HI position
6-1 : Continuity with the blower SW at M1 position
5-1 : Continuity with the blower SW at M2 position
4-1 : Continuity with the blower SW at HI position
System Outline
Service Hints

Page 668 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
309
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A238 (3MZ-FE)B642F740 (2AZ-FE)A240 (2AZ-FE)B842G543
A338 (3MZ-FE)B9A42H943A340 (2AZ-FE)B10B42J239 (3MZ-FE)
A10A42C11

Page 669 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
310
Manual Air Conditioning
: GROUND POINTS
CodeSee PageGround Points Location
ED48 (3MZ-FE)Rear Side of Cylinder Head
EE50 (2AZ-FE)Intake Side of Cylinder Block
EH48 (3MZ-FE

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TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
311
MEMO

Page 671 of 2572

TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
312
Rear Heater
15A
RR HTR
210A
HEATER
2 1
1G 81K13
IK2 2
IA2 11
BH1 9IO118
IR113
B- R O L L
Y Y
B
B Y Y
BL PW
J 5
R25
R26 A A
51
32
3 46
BB BF W- B W- B
W- B
W- BW- B
A
A
AA

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TOYOTA HIGHLANDER 2001 Service Repair Manual 2005 HIGHLANDER (EWD592U)
313
R24 Rear Heater Main SW
6-Ground : Approx. 12 volts with the ignition SW at ON position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
J543R2443R2645
J1944R2545R2

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