Suzuki Grand Vitara 1998, Service Manual

Page: 92 / 801

YH4
GRAND
VITARA
AIR CONDITIONING (OPTIONAL) 1B-21
Terminal Wire Circuit
Measurement
ground
Normal value Condition
AC2-1 L / Y Sensor ground
Ground to body
(Fig. A)
– 0.4 – 0 volt Engine running
1.5 volts
(3150 )
Evaporator thermistor temperature at
approx. 15
_
C (59
_
F) with engine
running
AC2-2 W / B
Evaporator
thermistor
temperature
(evaporator temp.
sensor) input
Ground to engine
(Fig. B)
2.62 volts
(6.311 )
Evaporator thermistor temperature at
approx. 1
_
C (34
_
F) with engine
running
* If the temperature is less than
approx. 1
_
C, in this case
compressor and condenser fan
should be stop (come back at more
than approx. 2.5
_
C (less than
5840 , 2.5 V))
H25
engine
E61-27 /
G16 J20
Gr / W
Signal output to
A / C controller
(A / C ON
Ground to engine
(Fig C)
10 – 14 volts
Required A / C ON (terminal AC-A13)
at engine running with normal
condition (refer to “INSPECTION OF
ECM AND ITS CIRCUIT” in Section
6E)
G16, J20
engines
E61-8
(
permission
signal)
(Fig. C)
0 – 1 volt
Except the above-mentioned with
engine running
In this case compressor should be
stop
H25
engine
E61-28 /
Y / B
Signal input from
A / C controller Ground to engine
0 – 1.5 volts Require A / C ON
G16, J20
engines
E61-17
Y / B
(A / C ON request
signal)
g
(Fig. C)
10 – 14 volts Turn off the A / C
H25
engine
E61-5 /
G16, J20
engines
E61-22
Y / L
A / C condenser
cooling fan relay
output
Ground to engine
(Fig. C)
0 – 1 volt
D
Blower fan motor switch and A / C or
defroster position switch (see
NOTE) ON with engine running at
evaporator thermistor temperature
input more than approx. 2.5
_
C (less
than 2.5 V (5840 )), refrigerant
pressure switch ON and signal
input from ECM ON
D
Engine coolant temperature sensor
more than 113
_
C (236
_
F) with
engine running
10 – 14 volts
Except the above-mentioned with
engine running
NOTE:
Defroster position switch circuit is equipped with LH vehicle only.