Suzuki Grand Vitara JB416 / JB420. Manual - part 277

7A-14 Heater and Ventilation: 

Center Ventilation Louver Removal and 
Installation

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Removal

1) Disconnect negative (–) cable at battery.
2) Disable air bag system referring to “Disabling Air 

Bag System in Section 8B”.

3) Remove center garnish with audio unit and HVAC 

control module referring to “Audio Unit Removal and 
Installation in Section 9C”.

4) Remove mounting screw (1) and then pull off center 

ventilation louver (2).

5) Disconnect connectors and remove center 

ventilation louver.

6) Remove center ventilation louver from center 

garnish.

Installation
Reverse removal procedure, noting the following item.
Insert backside of center ventilation louver to ventilator 
duct surely.
• When installing center ventilation louver, align boss 

(1) and claws (2) with installation hole of instrument 
panel.

• Enable air bag system referring to “Enabling Air Bag 

System in Section 8B”.

Side Ventilation Louver Removal and 
Installation

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Removal

1) Remove steering column hole cover.
2) Remove instrument panel referring to “Instrument 

Panel Removal and Installation in Section 9C”.

3) Remove screws and claws (3), and then remove 

defroster duct (2) from instrument panel.

4) Remove ventilator duct (1) from instrument panel.

5) Remove side ventilation louver (1) from instrument 

panel while pressing claws (2).

3. Clip

1

1

2

3

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2

2

1

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4. hole

2

1

3

4

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2

1

2

2

2

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Heater and Ventilation:  7A-15

Installation

1) Reverse removal procedure, noting the following.

• Install side ventilation louver (1) to instrument 

panel (2) as shown in figure.

• When installing defroster duct to instrument panel, 

put claws of defroster duct into hole of ventilator 
duct surely.

Rear Duct Components

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Rear Duct Removal and Installation

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Removal

1) Disconnect negative (–) cable at battery.
2) Remove front seats.
3) Remove console box.
4) Take off carpet till rear ducts is totally exposed.
5) Remove rear ducts (1).

Installation
Reverse removal procedure noting the following.
• Insert boss (1) of duct into hole of floor member (2).

1. Rear duct

1

2

1

2

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1

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1

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2

1

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7B-1 Air Conditioning System: 

HVAC

Air Conditioning System

Precautions

A/C System Caution

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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 HFC-
134a (R-134a) and the other using refrigerant 
CFC-12 (R-12).
Be sure to check which refrigerant is used 
before any service work including inspection 
and maintenance. For identification between 
these two types, refer to “A/C Refrigerant 
Type Description”.
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.

 

Precautions on Servicing A/C System

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WARNING

!

 

Should refrigerant HFC-134a (R-134a) is 
exposed to your eye(s), consult a doctor 
immediately.
• Do not use your hand to rub affected 

eye(s). Instead, use fresh cold water to 
splash it over affected area to thus 
gradually raise its temperature above the 
freezing point.

• Obtain proper treatment as soon as 

possible from a doctor or eye specialist. 
Should liquid refrigerant HFC-134a (R-
134a) is exposed to your skin, such 
affected part should be treated in the same 
manner as when skin is frostbitten or 
frozen.

 

Precautions in Diagnosing Trouble

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• Do not disconnect connector from HVAC control 

module, battery cable from battery, or main fuse 
before reading diagnostic information stored in HVAC 
control module memory.

• When diagnosing vehicle indoors, sunload sensor has 

to be lighted over vertically with an incandescent 
lamp. Otherwise, DTC is detected even if sunload 
sensor is normal.

• Diagnostic information (diagnostic trouble code) 

stored in HVAC control module can be checked by 
display of HVAC control module. Also, it can be 
checked by using SUZUKI scan tool. Before checking 
diagnostic information (diagnostic trouble code), read 
this manual and operator’s manual for SUZUKI scan 
tool to know how to read diagnostic information 
(diagnostic trouble code).

• When trouble is diagnosed using diagnostic 

information (diagnostic trouble code) on display of 
HVAC control module, keep in your mind that each 
diagnostic information (diagnostic trouble code) has 
priority, and only diagnostic information (diagnostic 
trouble code) which has the highest priority is 
indicated. Therefore, after troubleshooting the 
malfunction, make sure if there exists any other 
diagnostic information (diagnostic trouble code).

• After troubleshooting some trouble, DTC can be 

stored in HVAC control module memory as history 
DTC.

• Be sure to read “Precautions for Electrical Circuit 

Service” before inspection.

Precautions on Handling Refrigerant HFC-134a 
(R-134a)

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• When handling refrigerant, always wear goggles to 

protect your eyes.

• Avoid you direct contact to liquid refrigerant.
• Do not heat refrigerant container higher than 40 

°C 

(104 

°F).

• Do not discharge refrigerant into atmosphere.
• Do not allow liquid refrigerant to touch bright metals. 

Refrigerant combined with moisture is corrosive and 
will tarnish surfaces of bright metals including chrome.

• After recovering refrigerant from system, the amount 

of compressor oil removed must be measured and the 
same amount added to the system.

Air Conditioning System:  7B-2

Precautions on Servicing Refrigerant Line

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• When connecting hoses and pipes, apply a few drops of compressor oil (refrigerant oil) to seats of coupling nuts 

and O-ring.

For M16 engine model

For J20 engine model

4

[A]

[B]

OIL

1

OIL

1

OIL

2

OIL

2

OIL

3

OIL

4

OIL

3

OIL

5

OIL

5

OIL

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[A]: LH steering vehicle

2. Discharge hose

5. Pressure sensor

[B]: RH steering vehicle

3. Liquid pipe

: Apply compressor oil (refrigerant oil) to O-ring.

1. Suction hose

4. Expansion valve

4

OIL

1

OIL

2

OIL

3

[A]

[B]

OIL

5

OIL

1

OIL

2

OIL

4

OIL

3

OIL

5

OIL

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[A]: LH steering vehicle

2. Discharge hose

5. Pressure sensor

[B]: RH steering vehicle

3. Liquid pipe

: Apply compressor oil (refrigerant oil) to O-ring.

1. Suction hose

4. Expansion valve