2001 SUZUKI GRAND VITARA Air conditioning

1B-14 AIR CONDITIONING (OPTIONAL)
Wiring Circuit
ACG
LT GRN
PNK
PNK
BLKORN
BLK
YEL/GRNRED/BLKBLK/WHT
BLU/WHTPNK/BLK
PNK/GRN
RED/BLK
WHT/RED
YEL/GRN
YEL/BLU
A/C
RED/BLU
RED/BLU
RED/BLKBLK
BLU/ORN
BLU/WHT
BLU/WHT
PNK
PNK/BLU
BLK
PNK/WHT
YEL/BLK
GRY/WHT
GRN/BLK
BLK/WHT
RED/BLK
YEL/GRN
BLK
BLK
BLK
YEL/BLK
YEL/GRN
YEL/GRNBLU/GRN
BLU/YELBLUBLU/BLK
BLU/BLK
17
21
22 18
16
15
19
2026 25 24 23
14
12
29
3
4
7
33 30
31
32
28
27
1213
10
11
35 349
856
A
1. Front blower motor main relay 10. Compressor relay 19. Battery 28. Solenoid valve relay
2. Front blower motor 11. Compressor 20. Generator 29. Rear blower motor relay
3. Front blower motor resistor 12. Condenser cooling fan motor
relay21. Ignition main fuse 60 A 30. Rear blower motor resistor
4. Front blower motor switch 13. Condenser cooling fan motor 22. Heater/A/C main fuse 60 A 31. Rear blower motor
5. A/C controller 14. Fuse box 23.“IG METER” fuse 20 A 32. Rear blower motor switch
6. ECM (PCM) 15.“A/C” fuse 25 A 24.“REAR DEFG” fuse 25 A 33. Rear A/C main switch
7. Heater mode control switch 16. Ignition switch 25.“REAR BLOW” fuse 20A 34. Rear A/C evaporator temperature con-
troller
8. Dual (refrigerant) pressure switch 17. Main fuse box 26.“FRONT BLOW” fuse 30A 35. Rear A/C evaporator temperature sensor
9. A/C evaporator thermistor
(A/C evaporator temperature sensor)18. Battery main fuse 100 A 27. Solenoid valve [A] : Rear A/C wiring circuit (if equipped)

AIR CONDITIONING (OPTIONAL) 1B-15
Inspection of A/C Controller and Its Circuits
A/C Controller (1) and its circuits can be checked at A/C controller
wiring couplers by measuring voltage.
Voltage check
1) Remove A/C controller (1) from vehicle referring to “A/C
CONTROLLER” in this section.
2) Remove ECM (2) from vehicle.
3) Connect A/C controller couplers to A/C controller and con-
nect ECM couplers to ECM.
4) Check each terminal voltage with couplers connected by
referring to “A/C CONTROLLER VOLTAGE VALUES TABLE”. CAUTION:
A/C controller and ECM cannot be checked by itself.
It is strictly prohibited to connect voltmeter or ohmmeter
to A/C controller and ECM with couplers disconnected
from it.
3. Terminal AC-A-2
4. Terminal C51-3-6
NOTE:
For “Fig. A”, “Fig. B”, “Fig. C” in the figure, refer to “A/C
CONTROLLER VOLTAGE VALUES TABLE”.

1B-16 AIR CONDITIONING (OPTIONAL)
SYSTEM CIRCUIT
Terminal arrangement of A/C controller
Terminal arrangement of ECM
A: To “FRONT BLOW” fuse 1. Front blower motor relay 6. Dual (refrigerant) pressure switch 11. Condenser cooling fan motor
B: To “REAR DEFG” fuse 2. Front blower motor 7. A/C thermistor (evaporator temperature sensor) 12. A/C controller
C: To “IG METER” fuse 3. Front blower motor resistor 8. Compressor relay 13. ECM
D: To “A/C” fuse 4. Front blower motor switch 9. Compressor
5. A/C switch 10. Condenser cooling fan motor relay
5V
12V12V
12V5V
12V
5V
AC-A-1
AC-A-7
AC-A-4
AC-B-2
AC-B-1
AC-A-16AC-A-9
AC-A-2 AC-A-13
E61-8
E61-17
E61-22
A
DBBC
1
2
3
4
7 865
1011912
13
12 12
3
45 6 7 8 9 101112131415 16 AC-B
AC-A
87
22 23
34
3565
16 17
25
262
1
8 9
20
212
1
8 9
21
22 1 2 3 4 5 6
9
24 25 26 27 28 29 30 31 32 3310 11
12 13 14 15 16 17 18 19 20 211 2 3 4
7 8 9
10 11 12 13 14 15
18 19 20 21 22 23 243 4 5 6 7
10 11 12 13 14 15 16 17 18 19
22 23 24 25 26
27 283 4 5 6 7
10 11 12 13 14 15 16 19 18 2017
23
24 25 26 27 29 28 30 E61 C51-3 C51-1 C51-2

AIR CONDITIONING (OPTIONAL) 1B-17
A/C CONTROLLER VOLTAGE VALUES TABLE
Terminal Wire CircuitMeasurement
groundNormal value Condition
AC-A-1BLK/
WHTController main
power supplyGround to
engine (Fig B)10 – 14 VIgnition switch ON with engine
stopped
AC-A-2BLK/
YELController main
groundGround to body
(Fig A)–0.4 – 0 V Engine running
AC-A-4 ORNRefrigerant
(dual) pressure
switch inputGround to
engine (Fig B)0 – 1 VRefrigerant pressure within 225
kpa (2.3 kg/cm
2, 32.7 psi) to
2548 kpa (26 kg/cm
2, 370 psi)
with engine running
10 – 14 VRefrigerant pressure below 196
kpa (2.0 kg/cm
2, 28 psi) or above
3140 kpa (32 kg/cm
2, 455 psi)
with engine running
AC-A-7GRN/
BLKA/C switch and/
or defroster
switch inputGround to
engine (Fig B)8 – 14 VBlower fan motor switch or A/C or
defroster switch OFF with engine
running
0 – 1.5 VBlower fan motor switch and A/C
or defroster switch ON with
engine running
AC-A-9GRY/
WHTSignal input from
ECM (A/C ON
permission sig-
nal)Ground to
engine (Fig B)10 – 14 V Approve of A/C ON
0 – 1 V A/C ON forbid
AC-A-13YEL/
BLKSignal output to
ECM (A/C ON
request signal)Ground to
engine (Fig B)0 – 1.5 VBlower fan motor switch and A/C
or defroster switch ON with
engine running at A/C evaporator
temperature sensor temperature
input more than approx. 2.5 °C
(less than 2.5 V (5840 Ω)) and
refrigerant pressure switch is ON
10 – 14 VExcept the above-mentioned with
engine running
AC-A-16 PNKCompressor
magnet clutch
relay outputGround to
engine (Fig B)0 – 1 VBlower fan motor switch and A/C
or defroster switch ON with
engine running at A/C evaporator
temperature sensor temperature
input more than approx. 2.5 °C
(less than 2.5 V (5840 Ω)), refrig-
erant pressure switch ON and
signal input from ECM ON
10 – 14 VExcept the above-mentioned with
engine running
AC-B-1BLU/
YELSensor groundGround to body
(Fig A)–0.4 – 0 V Engine running

1B-18 AIR CONDITIONING (OPTIONAL)
Terminal Wire CircuitMeasurement
groundNormal value Condition
AC-B-2WHT/
BLKA/C evaporator
temperature
sensor (A/C
evaporator ther-
mistor) inputGround to
engine (Fig B)1.8 V
(3520 Ω)A/C evaporator temperature sen-
sor temperature at approx. 15 °C
(59 °F) with engine running
2.51 V
(5.855 Ω)A/C evaporator temperature sen-
sor temperature at approx. 4.5 °C
(34 °F) with engine running
If the temperature is less than
approx. 4.5 °C, in this case com-
pressor and condenser fan
should be stop (come back at
more than approx. 6.1 °C (less
than 5403 Ω, 2.4 V))
E61-8GRY/
WHTSignal output to
A/C controller
(A/C ON permis-
sion signal)Ground to
engine (Fig C)10 – 14 VRequired A/C ON (terminal AC-
A13) at engine running with nor-
mal condition (refer to “INSPEC-
TION OF ECM AND ITS
CIRCUIT” in Section 6E)
0 – 1 VExcept the above-mentioned with
engine running
In this case compressor should
be stop
E61-17YEL/
BLKSignal input from
A/C controller
(A/C ON request
signal)Ground to
engine (Fig C)0 – 1.5 V Require A/C ON
10 – 14 V Turn off the A/C
E61-22YEL/
BLUCondenser cool-
ing fan motor
relay outputGround to
engine (Fig C)0 – 1 VBlower fan motor switch and A/C
or defroster switch ON with
engine running at A/C evaporator
temperature sensor temperature
input more than approx. 2.5 °C
(less than 2.5 V (5840 Ω)), refrig-
erant pressure switch ON and
signal input from ECM ON
Engine coolant temperature sen-
sor more than 113 °C (236 °F)
with engine running
10 – 14 VExcept the above-mentioned with
engine running

AIR CONDITIONING (OPTIONAL) 1B-19
Refrigerant Recovery, Evacuation and Charging
Operation Procedure for Charging A/C with Refrigerant
WARNING:
Your eyes should not be exposed to refrigerant (liquid).
Any liquid Refrigerant-134a escaping by accident shows a temperature as low as approx. –6 °C
(21.2 °F) below freezing point. Should liquid HFC-134a (R-134a) get into your eyes, it may cause a
serious injury. To protect your eyes against such accident, it is necessary to always wear goggles.
Should it occur that HFC-134a (R-134a) strikes your eye(s), consult a doctor immediately.
–Do not use your hand to rub the affected eye(s). Instead, use quantities of fresh cold water to
splash it over the affected area to gradually raise temperature of such area above freezing point.
–Obtain proper treatment as soon as possible from a doctor or eye specialist.
Should the HFC-134a (R-134a) liquid come into contact with your skin, the affected area should be
treated in the same manner as when skin is frostbitten or frozen.
Refrigerant must not be handled near where welding or steam cleaning is performed.
Refrigerant should be kept at a cold and dark place. It should never be stored where a high temper-
ature is anticipated, e.g. where exposed to direct sun light, close to fire or inside vehicle (including
trunk room).
Avoid breathing fumes produced when HFC-134a (R-134a) is burned. Such fumes may be hazardous
to health.
Start evacuating
Charge proper amount of refrigerant
in gas form
Amount of refrigerant
Dual A/C model : 750±50g (1.65±0.11 lb, 26.45±1.76 oz)
Single A/C model : 500±50g (1.1±0.11 lb, 17.64±1.76 oz)

Inspect and repair connections Stop evacuating
Performance test
Check system for pressure tightness
Charge A/C with refrigerant
Check system for refrigerant leaks and
refrigerant charging quantity
20 minutes
Wait 10 minutes
If gauge shows abnormal conditions

1B-20 AIR CONDITIONING (OPTIONAL)
Recovery
NOTE:
When discharging refrigerant out of A/C system,
always recover it by using refrigerant recovery and
recycling equipment (1). Discharging it into atmo-
sphere would cause adverse effect to environments.
When handling recovery and recycling equipment, be
sure to follow the instruction manual for the equip-
ment.
1

AIR CONDITIONING (OPTIONAL) 1B-21
Evacuating
Evacuating procedure
1) Connect high charging hose (1) and low charging hose (2) of
manifold gauge set (3) respectively as follows:
High Charging Hose (1) → High pressure charging valve (4)
on Discharge Hose
Low Charging Hose (2) → Low pressure charging valve (5)
on Suction Pipe
2) Attach center charging hose (6) of manifold gauge set (3) to
vacuum pump (7).
3) Operate vacuum pump (7), and then open discharge-side
valve (9) (Hi) of manifold gauge set (3).
If there is no blockage in the system, there will be an indica-
tion on high pressure gauge (10).
When this occurs, open the other-side valve (8) (Lo) of the
set.
4) Approx. 10 minutes later, low pressure gauge (11) should
show –10 kPa (–1.0 kg/cm
2, –760 mmHg, –14.2 psi) provid-
ing no leakage exists.
5) Evacuation should be carried out for a total of at least 20
minutes.
6) Continue evacuation until low pressure gauge indicates –10
kPa (–1.0 kg/cm
2, –760 mmHg, –14.2 psi), and then close
both valves (8), (9).
7) Stop vacuum pump (7). Disconnect center charging hose (6)
from pump inlet. Now, the system is ready for charging refrig-
erant. CAUTION:
Do not evacuate before recovering refrigerant in system.
NOTE:
Whenever opened (exposed to atmospheric air), air con-
ditioning system must be evacuated by using a vacuum
pump. The A/C system should be attached with a mani-
fold gauge set, and should be evacuated for approx. 20
minutes.
NOTE:
If the system does not show –10 kPa (–1.0 kg/cm
2, –
760 mmHg, –14.2 psi), close both valves, stop vacuum
pump and watch movement of low pressure gauge.
Increase in the gauge reading suggests existence of
leakage. In this case, repair the system before continu-
ing its evacuation.
If the gauge shows a stable reading (suggesting no
leakage), continue evacuation.
3
11
8
2106
7
9
1
4
5