AIR CONDITIONING (OPTIONAL)
1B-9
A/ C CONTROLLER VOLTAGE VALUES TABLE
Termi-
nal
Wire
color
Circuit
Measurement
ground
Normal value
Condition
AC1-1
P
Compressor
magnet
Clutch
relay drive
Ground to engine
(Fig. B)
– 0.3 – 0.3 V
Fulfill all the following conditions
D
Blower fan motor switch ON
D
Fulfill either the following conditions
– A / C switch ON
– Defroster position or defroster / foot position
switch ON (LH model only)
D
Engine running
D
A / C evaporator temperature sensor
temperature input more than approx. 4
_
C
(39.2
_
F)
D
Dual (Refrigerant) pressure switch ON
D
Signal input from ECM ON
12 – 15 V
Except the above-mentioned conditions with
engine running
AC1-4
Y / R
A / C ON
signal output
to A / C
controller
through relay
Ground to engine
(Fig. B)
4 – 6 V
Fulfill all the following conditions
D
Blower fan motor switch ON
D
Fulfill either the following conditions
– A / C switch ON
– Defroster position or defroster / foot position
switch ON (LH model only)
D
Engine running
D
A / C evaporator temperature sensor
temperature input more than approx. 4
_
C
(39.2
_
F)
D
Dual (Refrigerant) pressure switch ON
12 – 15 V
Except the above-mentioned conditions with
engine running
AC1-8
Gr / W
A / C ON
Ground to engine
10 – 14 V
Approve of A / C ON
AC1-8
Gr / W
permission
g
(Fig. B)
– 0.3 – 0.3 V
A / C ON forbid
AC1-10
G / B
A / C switch
and / or
defroster
switch ON
signal input
Ground to engine
(Fig. B)
– 0.3 – 0.3 V
Fulfill all the following conditions
D
Blower fan motor switch ON
D
Fulfill either the following conditions
– A / C switch ON
– Defroster position or defroster / foot position
switch ON (LH model only)
D
Engine running
g
12 – 15 V
Except the above-mentioned condition with
engine running
AC1-13
Or
Dual
(Refrigerant)
Ground to engine
– 0.3 – 0.3 V
Dual (Refrigerant) pressure is ON with engine
running. For detail, refer to “DUAL PRESSURE
SWITCH” in this section
AC1-13
Or
(
g
)
pressure
switch input
g
(Fig. B)
12 – 15 V
Dual (Refrigerant) pressure is OFF with engine
running. For detail, refer to “DUAL PRESSURE
SWITCH” in this section
AC1-15
B
Controller
main ground
Ground to body
(Fig. A)
– 0.3 – 0.3 V
Engine running
AC1-16
B / W
Controller
main power
supply
Ground to engine
(Fig. B)
10 – 14 V
Ignition switch is ON position
A / C
evaporator
Approx. 1.0 V
(Approx. 2215
Ω
)
A / C evaporator temperature sensor temperature
at approx. 25
_
C (77
_
F) with engine running
AC2-1
B
eva orator
temperature
sensor (A / C
evaporator
thermistor)
input
Ground to engine
(Fig. B)
Approx. 2.0 V
(Approx. 5995
Ω
)
A / C evaporator temperature sensor temperature
at approx. 4
_
C (39.2
_
F) with engine running
If the temperature is less than approx. 4
_
C
(39.2
_
F), in this case compressor and condenser
fan should be stop, and come back at more than
approx. 6
_
C (42.8
_
F)
AC2-2
B
Sensor
ground
Ground to body
(Fig. A)
– 0.3 – 0.3 V
Engine running
