Ecm Voltage Values Table For Relation Of A/C Control - Suzuki Ignis Service Manual

ECM Voltage Values Table for Relation of A/C Control

Terminal Wire
C41-1 PNK/BLK Compressor magnet
clutch output
C41-5 BLK/RED Main power supply for
ECM
C41-6 BLK/RED Main power supply for
ECM
C41-10 BRN/ Main relay drive
WHT
C41-16 YEL/GRN A/C switch input
C41-18 BLU Radiator/condenser
cooling fan relay out-
put 1
C42-1 BLK/ORN Main ground for ECM
C42-2 BLK ECM ground for
power circuit
C42-3 BLK/ORN ECM ground for
power circuit
C42-10 ORN Sensor ground for
ECT sensor
C42-14 LT GRN/ ECT sensor input
BLK
C42-18 PNK/GRN Medium pressure
switch input
G02-3 PPL/YEL Radiator/Condenser
cooling fan relay out-
put 2
G02-10 ORN Sensor ground for A/C
evaporator tempera-
ture sensor
G02-13 PNK/BLU Blower fan speed
input
G02-14 WHT/BLK A/C evaporator tem-
perature sensor input
Circuit Measurement
ground
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 body
(Fig A)
Ground to body
(Fig A)
Ground to body
(Fig A)
Ground to body
(Fig A)
Ground to engine
(Fig B)
Ground to engine
(Fig B)
Ground to engine
(Fig B)
Ground to engine
(Fig A)
Ground to engine
(Fig B)
Ground to engine
(Fig B)
AIR CONDITIONING (OPTIONAL) 1B-19
Normal value
12 – 15 V Except the above-mentioned condition with engine
running
0 – 1 V Blower fan switch and A/C switch ON with engine
running
10 – 14 V Ignition switch ON with engine stopped
10 – 14 V Ignition switch ON with engine stopped
0.5 – 1.2 V Ignition switch ON with engine stopped
10 – 14 V Ignition switch OFF
12 – 15 V Blower fan switch or A/C switch OFF with engine
running
0 – 1 V Blower fan switch and A/C switch ON with engine
running
0 – 1 V Blower fan switch and A/C switch ON
Engine coolant temperature at more than 97.5°C
(207.5°F) with engine running
12 – 15 V Blower fan motor switch or A/C switch OFF
Engine coolant temperature at less than 97.5°C
(207.5°F) with engine running
–0.5 – 1 V Engine running
–0.5 – 1 V Engine running
–0.5 – 1 V Engine running
–0.5 – 1 V Engine running
0.71 – 0.75 V Engine coolant temperature at approximately 80°C
(298 – 320 Ω)
(176°F) with engine running
0.35 – 0.37 V Engine coolant temperature at Approximately
(135 – 144 Ω)
110°C (230°F) with engine running
If the temperature is more than 114°C (232°F),
compressor and condenser cooling fan should be
stop (come back at less than 112°C (230°F))
–0.5 – 1 V Medium pressure switch of A/C refrigerant pres-
sure switch ON
12 – 15 V Medium pressure switch of A/C refrigerant pres-
sure switch OFF
0 – 1 V Blower fan motor switch ON, A/C switch ON and
medium pressure switch OFF
Engine coolant temperature at more than 102.5°C
(216.5°F) with engine running
12 – 15 V Blower fan motor switch OFF, A/C switch OFF or
medium pressure switch ON
Engine coolant temperature at less than 102.5°C
(216.5°F) with engine running
–0.5 – 1 V Engine running
0 – 1 V Blower fan motor switch "ML", "MH", or "H" with
engine running
4 – 7 V Blower fan motor switch "L" position with engine
running
12 – 15 V Blower fan motor switch OFF with engine running
2.09 – 2.17 V A/C evaporator temperature at approximately 25°C
(1940 – 2060 Ω)
(77°F) with engine running
3.52 – 3.59 V A/C evaporator temperature at approximately 0°C
(6450 – 6850 Ω)
(32°F) with engine running
If the temperature is less than approximately 2.5°C
(36.5°F), compressor and condenser cooling fan
should be stop (come back at more than approxi-
mately 4°C (39.2°F)
Condition