AIR CONDITIONING (OPTIONAL)
1B-13
ECM VOLTAGE VALUES TABLE FOR RELATION OF A/C CONTROL
Terminal
Wire
Circuit
Measurement
ground
Normal value
Condition
E32-301
B
ECM main ground
Ground to
body (Fig A)
–0.4 – 0 volt
Engine running
E32-302
B/R
Main power supply
for ECM
Ground to
engine (Fig B)
10 – 14 volts
Ignition switch ON with engine
stopped
E32-313
Bl/B
ECM ground for
power circuit
Ground to
body (Fig A)
–0.4 – 0 volt
Engine running
E32-315
B/R
Power supply for
ECM power circuit
Ground to
engine (Fig B)
10 – 14 volts
Ignition switch ON with engine
stopped
E32-319
V/R
Main relay drive
Ground to
engine (Fig B)
0.5 – 1.2 volt
Ignition switch ON with engine
stopped
engine (Fig B)
0 volt
Ignition switch OFF
E32-320
Bl
Radiator (condens-
er) cooling fan relay
output
Ground to
engine (Fig B)
0 – 1 volt
Blower fan motor switch and A/C
switch ON or engine coolant temp
sensor more than 100
C (212
F)
with engine running
out ut
10 – 14 volts
Except the above-mentioned with
engine running
E32-326
Bl/B
ECM ground for
power circuit
Ground to
body (Fig A)
–0.4 – 0 volt
Engine running
E34-09
P/B
Blower load for
Ground to
0 – 1 volt
Blower fan motor switch ON with en-
gine running
E34-09
P/B
blower fan input
engine (Fig B)
10 – 14 volts
Blower fan motor switch OFF with
engine running
E34-19
Or/B
A/C switch input
Ground to
0 – 1 volts
Blower fan motor switch and A/C
switch ON with engine running
E34-19
Or/B
A/C switch in ut
engine (Fig B)
10 – 14 volt
Blower fan motor switch or A/C
switch OFF with engine running
E34-22
B/G
Sensor common
ground
Ground to
body (Fig A)
–0.4 – 0 volt
Engine running
E33-207
V/R
Evaporator thermis-
tor temperature
Ground to
2.0 – 2.5 volts
(2100 – 2580
)
Evaporator thermistor temperature at
approx. 15
C (59
F) with engine
running
E33-207
V/R
(EVAP temp sen-
sor) input
engine (Fig B)
3.1 – 3.3 volts
(4600 – 5100
)
Evaporator thermistor temperature at
approx. 0
C (32
F) with engine
running
E33-208
Lg/B
Engine coolant
temperature sensor
Ground to
0.71 – 0.76 volts
(290 – 320
)
Engine coolant temperature at
approx. 80
C (176
F) with engine
running
E33-208
Lg/B
tem erature sensor
input
engine (Fig B)
0.35 – 0.37 volts
(136 – 144
)
Engine coolant temperature at
approx. 110
C (230
F) with engine
running
E33-216
P/B
Compressor mag-
net clutch relay
Ground to
0 – 1 volt
Blower fan motor switch and A/C
switch ON with engine running
E33-216
P/B
net clutch relay
output
engine (Fig B)
10 – 14 volts
Except the above-mentioned with
engine running
