Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 396

7B-75 Air Conditioning System:

Installation

1) Install HVAC unit by reversing removal procedure,

noting the following items.
• When installing each part, be careful not to catch

any wiring harness.

• For diesel engine model, connect quick joint (1) to

HVAC unit, and then push lock plate (2)
completely in arrow direction.

• Replenish specified amount of compressor oil to

compressor suction side referring to “Precautions
on Replenishing Compressor Oil”.

• Install the padding (1) to the installation hole

uniformly.

• Fill engine coolant to radiator referring to “Cooling

System Flush and Refill: For Petrol Engine Model
in Section 1F” or “Cooling System Refilling: For
Diesel Engine Model in Section 1F”.

• Enable air bag system referring to “Enabling Air

Bag System in Section 8B”.

• Evacuate and charge system. Refer to “Operation

Procedure for Charging A/C with Refrigerant”.

A/C Evaporator Removal and Installation

S6JB0A7206009

Removal

1) Remove HVAC unit referring to “HVAC Unit Removal

and Installation”.

2) Remove evaporator (1) from HVAC unit by

disassembling HVAC unit.

3) Remove evaporator temperature sensor from

evaporator.

Installation
Reverse removal procedure to install A/C evaporator
nothing the following instructions.
• Install evaporator temperature sensor onto evaporator

referring to “A/C Evaporator Temperature Sensor
Removal and Installation”.

A/C Evaporator Inspection

S6JB0A7206010

1) Check evaporator fins for blockage. If found clogged,

use compressed air to clean the fins.

CAUTION

!

• Do not use water for cleaning of

evaporator.

• Be careful not to damage evaporator fins.

If evaporator fin is bent, straighten it by
using a screwdriver or pair of pliers. If any
leakage is found from fitting or tube, repair
or replace evaporator.

2) Check inlet and outlet fittings for crack or scratch.

Repair them as required.

3. Heater hose

2

3

1

I5JB0B720012-01

1

I5JB0A720045-02

Air Conditioning System: 7B-76

A/C Evaporator Temperature Sensor Removal
and Installation

S6JB0A7206011

Removal

1) Remove A/C evaporator (1) referring to “A/C

Evaporator Removal and Installation”.

2) Remove A/C evaporator temperature sensor (2)

from evaporator.

Installation

1) Identify evaporator by the following tables.

NOTE
As for Evaporator, there are 4 varieties
depending on the internal structure.

2) Install evaporator temperature sensor onto

evaporator in a correct position as shown in figure.

CAUTION

!

Mis-position causes insufficiency cooling
and damaged of A/C system.

Evaporator

type

Selection condition

A

LH steering vehicle

Evaporator with
protection rubber (1)

B

Evaporator without
protection rubber (2)

C

RH steering vehicle

Evaporator with
protection rubber

D

Evaporator without
protection rubber

3. Protection rubber

1

2

I5JB0A720046-01

1

2

3

I5GEB4720001-01

[A]: Evaporator type A

5. Holding part fixed to fin of 6th

line from the left-side edge

[B]: Evaporator type B

6. Sensor part fixed to fin of 5th

line from the left-side edge

[C]: Evaporator type C

7. Holding part fixed to fin of 3rd

line from the left-side edge

[D]: Evaporator type D

8. Sensor part fixed to fin of 8th

line from the right-side edge

1. Evaporator temperature

sensor

9. Holding part fixed to fin of 6th

line from the right-side edge

2. Evaporator

10. Sensor part fixed to fin of 5th

line from the right-side edge

3. 34.5 mm (1.36 in.)

11. Holding part fixed to fin of 3rd

line from the right-side edge

4. Sensor part fixed to fin of 8th

line from the left-side edge

4

2

5

6

7

9

8

11

10

3

[A]

[B]

2

3

2

3

[C]

[D]

2

3

1

1

1

1

I5GEB4720002-03

7B-77 Air Conditioning System:

A/C Evaporator Temperature Sensor Inspection

S6JB0A7206012

Check resistance between A/C evaporator temperature
sensor terminals. If check result is not in specification,
replace A/C evaporator temperature sensor with the new
one.

A/C evaporator temperature sensor resistance
11.2 – 11.5 k

Ω at 0 °C (32 °F)

3.8 – 3.9 k

Ω at 25 °C (77 °F)

Expansion Valve On-Vehicle Inspection

S6JB0A7206013

Refer to “A/C System Performance Inspection”.

Expansion Valve Removal and Installation

S6JB0A7206014

Removal

1) Recover refrigerant from the A/C system with

recovery and recycling equipment referring to
“Recovery” in “Operation Procedure for Charging A/
C with Refrigerant”.

2) Loosen a bolt (1) and remove pipes from expansion

valve (2).

3) Loosen bolts (3) and remove expansion valve.

Installation

1) Reverse removal nothing the following instructions.

• Apply compressor oil to O-ring of expansion valve

and pipes.

2) Evacuate and charge system according to

“Operation Procedure for Charging A/C with
Refrigerant”.

1. Expansion valve

(k

Ω

)

11.4

3.9
3.3

0

32

25
77

30
86

(˚C)

(˚F)

Resistance

Temperature

I5JB0A720090-03

IYSQ01720049-01

3

1

2

2

I5JB0A720048-02

Air Conditioning System: 7B-78

A/C Refrigerant Pressure Sensor and Its Circuit
Inspection (Petrol Engine Model)

S6JB0A7206015

1) Disconnect A/C refrigerant pressure sensor

connector.

2) Turn ignition switch to ON position.
3) Check if voltage between “GRY/RED” wire terminal

and “GRY/GRN” wire terminal of A/C refrigerant
pressure sensor connector is 4.75 V to 5.25 V.
If not, check A/C refrigerant pressure sensor circuit.

4) Connect A/C refrigerant pressure sensor connector

with ignition switch turned OFF.

5) Connect manifold gauge set to the charging valves.
6) Check A/C refrigerant pressure sensor voltage of

ECM connector referring to “A/C System Inspection
at ECM”.
If voltage is not as specified below, replace A/C
refrigerant pressure sensor.

A/C refrigerant pressure sensor voltage
specifications (A/C refrigerant pressure measured
by manifold gauge)
0.8 MPa (8.0 kg/cm

2

, 116 psi): Approx. 1.46 – 1.71 V

1.4 MPa (14 kg/cm

2

, 203 psi): Approx. 2.28 – 2.53 V

1.6 MPa (16 kg/cm

2

, 232 psi): Approx. 2.55 – 2.80 V

1.8 MPa (18 kg/cm

2

, 261 psi): Approx. 2.82 – 3.03 V

A/C Refrigerant Pressure Sensor and Its Circuit
Inspection (Diesel Engine Model)

S6JB0A7206047

1) Connect manifold gauge set to the charging valves.
2) Check output voltage for A/C refrigerant pressure

sensor (1) between each sensor terminal, and then
compare measured voltage with specified voltage in
graph.
If it does not show such characteristic as shown in
graph, replace refrigerant pressure sensor with new
one.

A/C Refrigerant Pressure Sensor Removal and
Installation

S6JB0A7206016

Removal

1) Recover refrigerant from the A/C system with the

recovery and recycling equipment referring to
“Recovery” in “Operation Procedure for Charging A/
C with Refrigerant”.

2) Disconnect negative (–) cable from battery.
3) Disconnect A/C refrigerant pressure sensor

connector.

4) Remove A/C refrigerant pressure sensor (1) from

liquid pipe (2).

4.5

3.6

0.42

180

2600

3300

(V)

(kPa)

1

I5JB0B720013-01

[A]: Petrol engine model
[B]: Diesel engine model

1

[A]

[B]

2

1

2

3

I6JB0A720011-01