Suzuki Ignis Service Manual page 2868

ECM voltage values table for relation of A/C control
Termi- Wire
nal
C63-16 LT GRE Engine cool-
ant tempera-
ture sensor
input
C63-28 ORN Sensor ground
C64-2 BLK ECM ground
for sensor cir-
cuit
C64-5 GRN/ Condenser
YEL cooling fan
relay No.2 out-
put
C64-11 PNK/ Magnet clutch
BLK relay output
C64-12 PNK Condenser
cooling fan
relay No.1 out-
put
C64-15 BRN/ Main relay
WHT
G91-4 BRN Radiator cool-
ing fan relay
output
G91-6 BLK/ Power supply
RED for engine con-
trol
G91-13 YEL Blower fan
switch
G91-15 WHT/ Evaporator
BLK thermistor
temp. input
Circuit Measure-
ment
Ground
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
body (Fig A)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Ground to
engine (Fig B)
Normal
Value
3.7 – 3.85 V Ignition switch ON, ECT at 0 ° C (32 ° F)
1.45 – 1.6 V Ignition switch ON, ECT at 50 ° C (122 ° F)
0.4 – 0.5 V Ignition switch ON, ECT at 100 ° C (212 ° F)
–0.5 – 0 V Ignition switch ON
–0.5 – 0 V Ignition switch ON
0 – 1 V Ignition switch ON, Engine coolant temper-
ature more than 110 ° C (230 ° F) or A/C
request signal low input
10 – 14 V Ignition switch ON, Engine coolant temper-
ature under 113 ° C (235 ° F) or A/C request
signal high input
0 – 1 V Engine running, A/C request signal low
input and engine coolant temperature less
than 110 ° C (230 ° F)
10 – 14 V Engine running, A/C request signal high
input and engine coolant temperature more
than 113 ° C (235 ° F)
0 – 1 V Ignition switch ON, Engine coolant temper-
ature more than 110 ° C (230 ° F) or A/C
request signal low input
10 – 14 V Ignition switch ON, Engine coolant temper-
ature under 113 ° C (235 ° F) or A/C request
signal high input
0 – 1 V Ignition switch ON
10 – 14 V Ignition switch OFF
0 – 1 V
10 – 14 V
10 – 14 V Ignition switch ON
0 – 2 V Blower fan switch 2nd or 3rd or 4th position
with ignition switch ON
3 – 6 V Blower fan switch 1st position with ignition
switch ON
10 – 14 V Blower fan switch OFF position with ignition
switch ON
1.9 – 2.3 V Evaporator thermistor temperature at
(1940 – approximately 25 °C (77 °F) with ignition
2060 Ω) switch ON
3.3 – 3.8 V Evaporator thermistor temperature at
(6450 – approximately 0 °C (32 °F) with ignition
6850 Ω)
switch ON
AIR CONDITIONING (OPTIONAL) 1B-17
Condition