2001 SUZUKI GRAND VITARA ect

1A-2 HEATER AND VENTILATION
General Description
The heater, an in and out air selectable-type hot water heater, is so constructed that it is possible to assure an
agreeable ventilation at all times by providing the ventilator air outlets at the center and both sides (right and left)
of the instrument panel, the hot air outlet at a place close to the feet, and the defroster air outlets at places, right
and left, along the windshield glass.
The heater and ventilation consist of the following parts.
1. Side ventilator outlet 4. Heater unit 7. Heater control lever assembly 10. Rear duct
2. Side defroster outlet 5. Defroster duct 8. Heater mode control switch
3. Center ventilator outlet 6. Ventilator duct 9. Blower unit
10

HEATER AND VENTILATION 1A-3
Rear Duct
REMOVAL
1) Disconnect negative (–) cable at battery.
2) Remove front and second seats.
3) Remove console box.
4) Take off carpet till rear duct is totally exposed.
5) Remove rear duct.
INSTALLATION
Reverse removal sequence to install rear duct.
1. Heater unit
2. Rear duct
1
2

AIR CONDITIONING (OPTIONAL) 1B-1
1B
SECTION 1B
AIR CONDITIONING (OPTIONAL)
CONTENTS
General Description ....................................... 1B-3
Refrigerant Type .......................................... 1B-3
Refrigerant Flow of Air Conditioning System 1B-3
Major Components And Location ................. 1B-4
Diagnosis ........................................................ 1B-6
General ........................................................ 1B-6
Main A/C system (front A/C system) ........ 1B-6
Rear A/C system ...................................... 1B-8
Quickly Checking of Refrigerant Charge
(If Equipped with Sight Glass) ...................... 1B-9
Performance Diagnosis .............................. 1B-10
Performance diagnosis table .................. 1B-12
Detail diagnosis table (at ambient temperature within 30 - 35 °C
(85 - 95 °F)) ............................................ 1B-13
Wiring Circuit.............................................. 1B-14
Inspection of A/C Controller and Its
Circuits ....................................................... 1B-15
Voltage check......................................... 1B-15
Refrigerant Recovery, Evacuation and
Charging ....................................................... 1B-19
Operation Procedure for Charging A/C with
Refrigerant ................................................. 1B-19
Recovery .................................................... 1B-20
Evacuating ................................................. 1B-21
Evacuating procedure ............................ 1B-21
Checking system for pressure leaks ...... 1B-22 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:
 Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
 Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
CAUTION:
The air conditioning system of this vehicle uses refrigerant HFC-134a (R-134a).
None of refrigerant, compressor oil and component parts is interchangeable between two types of
A/C: one using refrigerant CFC-12 (R-12) and the other using refrigerant HFC-134a (R-134a).
Be sure to check which refrigerant is used before any service work including inspection and mainte-
nance. For identification between these two types, refer to “REFRIGERANT TYPE” in this section.
When replenishing or changing refrigerant and compressor oil and when replacing parts, make sure
that the material or the part to be used is appropriate to the A/C installed in the vehicle being serviced.
Use of incorrect one will result in leakage of refrigerant, damage in parts or other faulty condition.
NOTE:
 For the descriptions (items) not found in this section, refer to the same section of the Service Man-
ual mentioned in FOREWORD of this manual.
 For basic servicing method of the air conditioning system that is not described in this section, refer
to “AIR CONDITIONING BASIC MANUAL (99520-02130)”.

AIR CONDITIONING (OPTIONAL) 1B-3
General Description
Refrigerant Type
Whether the A/C in the vehicle being serviced uses HFC-134a
(R-134a) or CFC-12 (R-12) is indicated on LABEL on the com-
pressor. Also, it can be checked by the shape of the service
(charge) valve.
Refrigerant Flow of Air Conditioning System
[A] : HFC-134a (R-134a)
[B] : CFC-12 (R-12)
1. Compressor label
2. Service valve
NOTE:
For single A/C model, refer to the same section of the Service Manual mentioned in FOREWORD of
this manual.
[A] : Dual A/C model 3. Condenser assembly 6. Expansion valve 9. Rear expansion valve
1. Compressor 4. Receiver/dryer 7. A/C evaporator 10. Rear A/C evaporator
2. Magnet clutch 5. Dual pressure switch 8. Solenoid valve
[A]10
8
9
5
7
6
3
2
14 : Liquid
: Vapor
: Superheated Vapor

1B-6 AIR CONDITIONING (OPTIONAL)
Diagnosis
General
Main A/C system (front A/C system)
Condition Possible Cause Correction
Cool air does not
come out (A/C system
does not operative)No refrigerant Perform recover, evacuation and
charging.
Fuse blown Check “IG METER”, “REAR DEFG”
and “A/C” fuses, and check for
short circuit to ground.
A/C switch faulty Check A/C switch.
Blower motor switch faulty Check blower motor switch.
A/C evaporator temperature sensor (A/C evap-
orator thermistor) faultyCheck A/C evaporator tempera-
ture sensor (A/C evaporator ther-
mistor).
Refrigerant (dual) pressure switch faulty Check refrigerant (dual) pressure
switch.
Wiring or grounding faulty Repair as necessary.
A/C ON permission signal in ECM faulty Check A/C ON permission signal.
A/C controller and its circuit faulty Check A/C controller and its circuit.
Cool air does not
come out (A/C com-
pressor does not
operative (won’t rota-
tive))Magnet clutch faulty Check magnet clutch.
Compressor relay faulty Check compressor thermal switch.
Compressor relay faulty Check compressor relay.
Drive belt loose or broken Adjust or replace drive belt.
Compressor faulty Check compressor.
A/C ON permission signal in ECM faulty Check A/C ON permission signal.
A/C controller faulty Check A/C controller.
Cool air does not
come out (A/C con-
denser cooling fan
motor does not opera-
tive)Condenser cooling fan motor relay faulty Check condenser cooling fan motor
relay.
Wiring or grounding faulty Repair as necessary.
A/C condenser fan motor relay signal in ECM
faultyCheck A/C condenser cooling fan
motor relay signal.
Condenser cooling fan motor faulty Check condenser cooling fan
motor.
Cool air does not
come out (Blower
motor does not opera-
tive)Fuse blown Check “FRONT BLOW” and
“REAR DEFG” fuses, and check for
short circuit to ground.
Blower motor relay faulty Check blower motor relay.
Blower motor resistor faulty Check blower motor resistor.
Blower motor switch faulty Check blower motor switch.
Wiring or grounding faulty Repair as necessary.
Blower motor faulty Check blower motor.

AIR CONDITIONING (OPTIONAL) 1B-7
Cool air does not
come out or insuffi-
cient cooling (A/C sys-
tem normal operative)Insufficient or excessive charge of refrigerant Check charge of refrigerant.
Refrigerant leak in system Check system for leaks.
Condenser clogged Check condenser.
A/C evaporator clogged or frosted Check A/C evaporator.
A/C evaporator temperature sensor (A/C evap-
orator thermistor) faultyCheck A/C evaporator tempera-
ture sensor (A/C evaporator ther-
mistor).
A/C controller faulty Check A/C controller.
Expansion valve faulty Check expansion valve.
Drive belt slipping Check or replace drive belt.
Magnetic clutch faulty Check magnetic clutch.
Cool air does not
come out or insuffi-
cient cooling (A/C sys-
tem normal operative)Compressor faulty Check compressor.
Air in A/C system Replace condenser dryer, and then
perform evacuation and charging.
Air leaking from cooling unit or air duct Repair as necessary.
Heater and ventilation system faulty Check air inlet box assembly.
Check heater control lever assem-
bly.
Check heater assembly.
Blower motor faulty Check blower motor.
Excessive compressor oil existing in A/C sys-
temPull out compressor oil in A/C sys-
tem circuit, and replace compres-
sor.
Cool air does not
comes out only inter-
mittentlyWiring connection faulty Repair as necessary.
Expansion valve faulty Check expansion valve.
Excessive moisture in A/C system Replace condenser dryer, and then
perform evacuation and charging.
A/C controller faulty Check A/C controller.
Magnetic clutch faulty Check magnetic clutch.
Excessive charge of refrigerant Check charge of refrigerant.
Cool air comes out
only at high speedsCondenser clogged Check condenser.
Insufficient charge of refrigerant Check charge of refrigerant.
Air in A/C system Replace condenser dryer, and then
perform evacuation and charging.
Drive belt slipping Adjust or replace drive belt.
Compressor faulty Check compressor.
Cool air does not
comes out only at high
speedsExcessive charge of refrigerant Check charge refrigerant.
A/C evaporator frosted Check A/C evaporator.
Check A/C thermistor.
Insufficient velocity of
cooled airA/C evaporator clogged or frosted Check A/C evaporator.
Air leaking from cooling unit or air duct Repair as necessary.
Blower motor faulty Check blower motor.
Wiring or grounding faulty Repair as necessary. Condition Possible Cause Correction

1B-8 AIR CONDITIONING (OPTIONAL)
Rear A/C system
Condition Possible Cause Correction
Cool air dose not come
out (Rear blower motor
normal operative)Solenoid valve relay faulty Check solenoid valve relay, and then
replace if necessary
Solenoid valve faulty Check solenoid valve, and then replace if
necessary
Diode in rear A/C harness faulty Check diode, and then replace rear A/C
harness if necessary
Rear A/C evaporator temperature controller faulty Check rear A/C evaporator temperature
controller, and then replace if necessary
Rear blower motor switch faulty Check rear blower motor switch, and
then repair rear A/C evaporator and
check rear A/C evaporator temperature
controller if necessary
Rear A/C evaporator clogged or frosted Check rear A/C evaporator, and then
replace if necessary
Rear expansion valve faulty Check rear expansion valve, and then
replace if necessary
Air leaking from rear A/C unit or air duct Check and repair if necessary
Insufficient or excessive charge of refrigerant Check charge of refrigerant, and then
perform recovery, evacuation and charg-
ing if necessary
Refrigerant pipe or hose deformed Check pipe (hose), and then replace if
necessary
Cool air dose not come
out (Rear blower motor
dose not operative)Fuse blown Check “A/C” and “REAR BLOW” fuses,
and then check for short circuit to ground
Rear blower motor relay faulty Check rear blower motor relay, and then
replace if necessary
Rear A/C main switch faulty Check rear A/C main switch, and then
replace if necessary
Rear blower motor switch faulty Check rear blower motor switch, and
then replace if necessary
Rear blower motor resister faulty Check rear blower motor resister, and
then replace if necessary
Wiring or grounding faulty Check and repair
Rear blower motor faulty Check rear blower motor, and then
replace if necessary
Cool air dose not come
out at only intermittentlyLoose or poor connected wiring connector Connect connector correctly
Rear expansion valve faulty Check rear expansion valve, and then
replace if necessary
Rear A/C evaporator temperature controller faulty Check rear A/C evaporator temperature
controller, and then replace if necessary
Wiring or grounding faulty Check and repair
Cool air dose not come
out at only high speedRear A/C evaporator frosted Check rear A/C evaporator temperature,
evaporator drain hose and then replace if
necessary
Insufficient velocity of
cooled airRear A/C evaporator clogged or frosted Check rear A/C evaporator, and then
repair rear A/C evaporator or check rear
A/C evaporator temperature if necessary
Air leaking from rear A/C unit or air duct Check rear A/C unit and air duct, and
then repair if necessary
Rear blower motor faulty Check rear blower motor, and then
replace if necessary
Wiring or grounding faulty Check and repair

AIR CONDITIONING (OPTIONAL) 1B-9
Quickly Checking of Refrigerant Charge (If
Equipped with Sight Glass)
The following procedure can be used for quickly checking whether
the A/C system has a proper charge of refrigerant or not.
1) Run engine at fast idle.
2) Operate A/C at the following conditions for a few minutes.
Main (front) A/C switch at ON position.
Rear A/C main switch at ON position (if equipped).
Front blower motor switch at max position.
Rear blower motor switch at max position (if equipped).
Air outlet control button at face position.
Temperature control lever at max cool position.
Vehicle door at all open.
Air inlet door at recirculation position.
3) Look at the sight glass (1) and compare what is observed
with the symptoms listed in the table given below.
2. Bubbles
2
1
Condition Possible Cause Correction
Bubbles observed in sight
glassInsufficient charge of refrigerant in system Check system for leaks with a leak tester.
No bubbles observed in
sight glassNo charge or proper or too much charge of refrigerant in
systemRefer to the following items.
No temperature differ-
ence between compressor
inlet and outletEmpty or nearly empty system Perform recovery, evacuating and charg-
ing system and then check it for leaks
with a leak tester.
Noticeable temperature
difference between com-
pressor inlet and outletProper or too much charge of refrigerant in system Refer to the following items.
When A/C is turned OFF,
refrigerant in sight glass
clears immediately and
remains clearToo much charge of refrigerant in system Recharge with specified amount of refrig-
erant.
When A/C is turned OFF,
refrigerant in sight glass
once produces bubbles
and then clearsProper charge of refrigerant in system Perform “PERFORMANCE DIAGNOSIS”
in this section.
NOTE:
For specified amount of refrigerant, refer to “OPERATION PROCEDURE FOR CHARGING A/C WITH
REFRIGERANT” in this section.