Haima M3. A/C, Restraint System, Body Accessories, Electrical System. Manual

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A/C System3A-17

Maintenance Warning and
Instruction

Treatment of the refrigerant

1. Please avoid inhaling the air containing the

refrigerant or lubricant vapor, for these gases
may cause irritation to eyes, nose and throat.
For environmental concerns, we strongly
recommend that the recovery/recycling/filling
equipment be adopted for R134a emission
from the A/C system. If an accidental leak in
the system may occur, please ensure the work
area is well ventilated before continuing the
maintenance.

2. Do not use the compressed air method to

perform the pressure or leak test for the
R134a maintenance equipment and/or the
vehicle A/C system. The mixture of R134a
and air at certain proportion is flammable
when the pressure is increased; if ignited, it
shall cause personal injury or property
damage. For other health and safety
information, please obtain from the
refrigerant supplier.

3. Do not let the refrigerant leak near an open

flame or other sources of heat. The refrigerant
will produce toxic gases when it is exposed to
the heat sources such as cigarettes or heaters.
If the operation may cause leakage, be sure to
avoid the above-mentioned heat sources and
maintain good ventilation.

4. Handling refrigerant is dangerous. Dripping a

drop of refrigerant on the skin will cause
localized frostbite; therefore, be sure to wear
gloves and goggles. If the refrigerant is
splashed into eyes, rinse with water
immediately and then go to the doctor.

Storage of the refrigerant

There is high pressure inside the refrigerant
reservoir. It may explode when being exposed to
the heat source, making metal fragments and
refrigerant splashing in all directions, which would
cause personal injury. The refrigerant should be
stored in the places with the temperature below 40
℃

{1040F).

Treatment of the compressor oil

1. Only the PAG 105# compressor oil can be

adopted for this vehicle and other kinds of oil
may cause damage to the A/C compressor.

2. Don’t let the PAG 105# compressor oil drop

on the vehicle body, or else the paint may
come off. If it drops on the vehicle body

accidentally, wiper it off immediately.

3. The PAG 105 # compressor oil is of higher

moisture absorption capacity than the
previously used mineral oil. The moisture
mixed into the compressor oil may cause
damage to the refrigeration system; therefore,
after the refrigeration system components are
removed, you should close the lid
immediately to prevent any moisture from
entering.

Maintenance Procedures for
Refrigeration System

Installing the manifold gauge

1. Close the valve on the SST(49C061001)

completely.

2. Connect the SST(49C061002, 49C061003)

and the SST(49C061001) respectively with
the low pressure port and the high pressure
port.

3. Connect the ends of the SST(49C061006A,

49C061007) and the SST(49C061002,
49C061003).

4. Connect the SST(49C061006A, 49C061007)

with the filler port.

ATMOS GU10 compressor oil

Time

Mineral oil

Mois

ture abs

orptio

n cap

aci

Cover

Filler port at the
low pressure end

Filler port at the high
pressure end

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A/C System3A-18

Recovering the refrigerant

Warning:

1. Please avoid inhaling the air containing the

Connect the R134Ra
recovery/recycling/filling equipment with the
vehicle and operate it as per the
manufacturer’s instruction book.

Refrigerant filling

Warning:

Please avoid inhaling the air containing the
refrigerant or lubricant vapor, for these gases may
cause irritation to eyes, nose and throat. For
environmental concerns, we strongly recommend
that the recovery/recycling/filling equipment be
adopted for R134a emission from the A/C system.
If an accidental leak in the system may occur,
please ensure the work area is well ventilated
before continuing the maintenance.

Caution:

Please fill the system with proper amount of
refrigerant, for the excessive refrigerant will
reduce the operating efficiency of the A/C and
damage the refrigeration cycle system.

Recovering the used R134a refrigerant

Connect the R134Ra

recovery/recycling/filling equipment with the
vehicle and operate it as per the manufacturer’s
instruction book.

Adding fresh R134a refrigerant

1. Install the SST(manifold gauge) (Refer to

Installing the Manifold Gauge).

2. Connect the pin plug of the SST(49C061004)

with the bleeder valve of the
SST(49C061001).

3. Connect the SST(49C061005) with the central

port of the SST(49C061001).

4. Connect the SST(49C061005) with the

vacuum pump.

5. Connect the SST(49C061004) with the

refrigerant reservoir.

6. Put the refrigerant reservoir on the scale.

Specified refrigerant capacity:

600g{21. 20z)

675g{23. 80z): in extremely hot areas

7. Open all the valves of the ST(49C061001).

Caution:

Close the SST valves immediately after turning off
the vacuum pump; otherwise, the oil in the vacuum
pump will return to the refrigeration cycle system,
resulting in the decreased efficiency of the A/C
system.

8. Operate the vacuum pump for 15min.

9. Confirm the reading of the high and low

pressure ends of the SST(49C061001) is －
101kPa{ － 760mmHg, － 29.9inHg). Close
each valve of the SST(49C061001).

Closed

Pin plug

Vacuum pump

Scale

Refrigerant
reservoir

Bleeder valve

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A/C System3A-19

10. Turn off the vacuum pump and wait for 5min.

11. Check the reading of the high and low

pressure ends of the SST(49C061001). If the
value changes, check for any leak and start
from the step 7. If there is no change, go to
the step 12.

12. Open the valves of the refrigerant reservoir.

13. Weigh the reservoir.

Warning:

1) If the refrigeration system is filled with

excessive refrigerant or when there is any
leakage, the refrigerant would dissipate into
the atmosphere. In order to prevent the
damage to the ozone layer caused by the
accidental leakage, please perform the
correct steps for checking the leakage and
only add proper amount of refrigerant.

2) It is dangerous to operate the engine when

filling the system with refrigerant with the
high pressure valve of the reservoir open.
The pressure in the reservoir would increase
resulting in explosion, making metal
fragments and refrigerant splashing in all
directions, which would cause personal
injury; therefore, don’t open the high
pressure valve when the engine is operating.

14. Open the high pressure valve of the

SST(49C061001).

15. When the reading of the low pressure end

increases to 0.098MPa{1.0kgf/ cm2,14psi},
close the high pressure valve of the
SST(49c061001).

16. Use the SST(refrigerant leak detector) to

check the cooling pipe/hose for any leak. If
there is no leak, go to the step 17; if there is
leak due to the insecurely connected
connector, tighten the connector and recheck
for any leak. If the leak still exists, drain off
the refrigerant and repair the connector. Refill
the refrigerant from the step 7. If there is no

leak after the connector is tightened, go to the
step 17.

Warning:

It is dangerous to operate the engine when filling
the system with refrigerant with the high pressure
valve of the reservoir open. The pressure in the
reservoir would increase resulting in explosion,
making metal fragments and refrigerant splashing
in all directions, which would cause personal
injury; therefore, don’t open the high pressure
valve when the engine is operating.

17. Open the high pressure valve of the

SST(49C061001) and start to fill until the
weight of the reservoir is reduced by 300g110.
60zl compared to the weight obtained in the
step 13.

18. Close the high pressure valve of the

SST(49C061001).

Warning:

It is dangerous to operate the engine when filling
the system with refrigerant with the high
pressure valve of the reservoir open. The
pressure in the reservoir would increase resulting
in explosion, making metal fragments and
refrigerant splashing in all directions, which
would cause personal injury; therefore, don’t
open the high pressure valve when the engine is
operating.

19. Start the engine and turn on the A/C

Open

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A/C System3A-20

compressor.

20. Open the low pressure valve of the

SST(49C061001) and start to fill until the
weight of the reservoir is reduced to the
specified amount compared to the weight
obtained in the step 13.

21. Close the low pressure valve of the

SST(49C061001) and the valve of the
refrigerant reservoir.

22. Turn off the engine and the A/C compressor.

23. Use the SST(air leak detector) to check for

any leak. If there is no leak, go to the step 24;
if there is leak due to the insecurely connected
connector, tighten the connector and recheck
for any leak. If the leak still exists, drain off
the refrigerant and repair the connector. Refill
the refrigerant from the step 7. If there is no
leak after the connector is tightened, go to the
step 24.

24. Separate the SST(49C061006A, 49C061007)

from the filler port.

25. Close the filler port cover tightly.

Adding the refrigerant

Warning:

Caution:

Please fill the system with proper amount of
refrigerant, for the excessive refrigerant will
reduce the operating efficiency of the A/C and
damage the refrigeration cycle system.

Recovering the used R134a refrigerant

Connect the R134Ra recovery/recycling/filling
equipment with the vehicle and operate it as per
the manufacturer’s instruction book.

Adding fresh R134a refrigerant

1. Install the SST(manifold gauge) (Refer to

Installing the Manifold Gauge).

2. Connect the pin plug of the SST(49C061004)

with the bleeder valve of the
SST(49C061001).

3. Connect the SST(49C061005) with the central

port of the SST(49C061001).

4. Connect the SST(49C061005) with the

vacuum pump.

5. Connect the SST(49C061004) with the

refrigerant reservoir.

6. Only open the central valve of the

SST(49C061001).

Caution:

Close the valve of the SST(49C061001)
immediately after turning off the vacuum pump;
otherwise, the oil in the vacuum pump will return
to the refrigeration cycle system, resulting in the
decreased efficiency of the A/C system.

7. Operate the vacuum pump for 1min.

8. Close the central valve of the

SST(49C061001).

9. Turn off the vacuum pump.

10. Open the valves of the refrigerant reservoir.

Warning:

11. Start the engine and turn on the A/C

compressor.

12. Open the low pressure valve of the

SST(49C061001).

Pin plug

Bleeder valve

Refrigerant
reservoir

Vacuum pump

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A/C System3A-21

13. Add the refrigerant according to the

inspection result.

14. Close the low pressure valve of the

SST(49C061001) and the valve of the
refrigerant reservoir.

15. Turn off the engine and the A/C compressor.

16. Separate the SST(49C061006A, 49C061007)

from the filler port.

17. Close the filler port cover tightly.

Checking the refrigerant

1. Warm up the engine and keep it operating

stably at 1,500rpm.

2. Turn the fan switch to the position 4.

3. Turn on the A/C switch.

4. Select the RECYCLE mode.

5. Set the temperature to the MAXCOLD mode.

6. Select

the

VENT

mode.

7. Close all doors and windows.

8. Check the refrigerant amount.

9. Troubleshoot the refrigeration system. (Refer

to the Fault Diagnosis)

Checking the refrigerant pressure

1. Install the SST(manifold gauge) (Refer to

Installing the Manifold Gauge).

2. Warm up the engine and keep it operating

stably.

3. Turn the fan switch to the position 4.

4. Turn on the A/C switch.

5. Select the INTERNAL CIRCULATION mode.

6. Set the temperature to the MAXCOLD mode.

7. Select the “TO FACE” mode.

8. Close all doors and windows.

9. Measure the ambient temperature and the

readings of the high and low pressure ends of
the SST(49C061011).

10. Ensure the pressure readings of the

SST(49C06001) and the ambient temperature
conform to the following figures.

Open

Sight glass

Cover

ani

gaug

essu

re read

Ambient temperature

High pressure end

Low pressure end

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A/C System3A-22

11. If not within the specified range, troubleshoot

the refrigeration system. (Refer to the Fault
Diagnosis)

Refrigeration System Performance Test

1. Conduct the refrigerant inspection and the

refrigerant pressure test (Refer to Checking
the Refrigerant) (Refer to Checking the
Refrigerant Pressure).

2. If not qualified, troubleshoot the refrigeration

system (Refer to the Fault Diagnosis). If it is
correct, go to the next step.

3. Disconnect the connector of the ambient

temperature sensor.

4. Put a dry-bulb thermometer at the central air

vent at the driver side.

5. Open the engine hood.

6. Warm up the engine and keep it operating

stably at 1,500rpm.

7. Turn the fan switch to the position 4.

8. Turn on the A/C switch.

9. Select the INTERNAL CIRCULATION mode.

10. Set the temperature to the MAXCOLD mode.

11. Select the “TO FACE” mode.

12. Close all doors and windows.

13. Wait until the A/C output temperature

becomes stable. When the A/C compressor is
turned on and off repeatedly via the A/C
compressor control of the A/C amplifier, the
output temperature has become stable.

14. Record the middle air vent outlet temperature

at the driver side.

15.

Determine and record the ambient
temperature.

16. Ensure the temperature reading is within the

shadow shown as follows.

17. If not within the specified range, troubleshoot

the refrigeration system. (Refer to the Fault
Diagnosis)

18. Connect the connector of the ambient

temperature sensor.

Mid

dle

air

nt t

empera

ture

Ambient temperature

Outlet temperature

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A/C System3A-23

Basic System

Structure View

HVAC assembly

Rear DIRECTED-TO-FEET system

Fan heater water pipe

Cooling tube

A/C compressor

Condenser

Removal/Installation of HVAC Assembly

1. Disconnect the negative cable of the battery.

1. Drain the refrigerant out of the system. (Refer

to Recovering the Refrigerant, Maintenance
Procedures for Refrigeration System) (Refer
to Refrigerant Filling, Maintenance
Procedures for Refrigeration System)

2. Remove the instrument panel. (Refer to the

Removal/Installation of Instrument Panel,
Instrument Panel and Control Panel)

3. Remove the front seats. (Refer to the

Removal/Installation of Front Seats)

4. Perform the removal in the order shown in the

following table.

5. Perform the installation in reverse order of the

removal.

Disassembly/Assembly of HVAC

1. Perform the disassembly in the order shown

in the following table.

2. Perform the installation in reverse order of the

removal.

Defrosting air duct

Left housing, fan heater

Linkage assembly of each mode

Right housing, fan heater

Left lower DIRECTED-TO-FEET air duct

Right lower DIRECTED-TO-FEET air
duct

Air duct

Expansion valve

Seal ring, fan heater water pipe

Blower

Fresh air duct

Upper housing, air cooler

Lower housing, air cooler

Evaporator core

Lower housing, fan heater

Heater core

Speed regulation assembly

Weep pipe

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A/C System3A-24

Removal/Installation of Air Flow Mode
Main Linkage

1. Disconnect the air flow mode wiring from the

air flow mode main linkage.

2. Perform the removal in the order shown in the

following table.

3. Perform the installation in reverse order of the

removal.

4. Adjust the air flow mode wiring. (Refer to the

Adjustment of Climate Control Unit Wiring,
Control System)

Air flow mode main linkage (Refer
to the Installation Instruction)

Installation Instruction for Air Flow
Mode Main Linkage

Caution:

Please apply the specified grease on the main
linkage, for the adoption of other grease would
cause abnormal noise or abnormal operation of the
linkage.

1. Push and hold the air flow mode auxiliary

linkage to the direction shown by the arrow.

2. Install the main linkage on the heater unit by

the way shown in the figure.

3. Press the air flow mode main linkage gently

and rotate it to the direction shown by the
arrow; then, install each bulge of the air flow
mode auxiliary linkage into the groove of the
main linkage.

4. Rotate the main linkage and ensure the

normal shifting between different air flow
modes.

Removal/Installation of A/C Compressor

2. Disconnect the negative cable of the battery.

3. Drain the refrigerant out of the system. (Refer

to Recovering the Refrigerant, Maintenance
Procedures for Refrigeration System) (Refer
to Refrigerant Filling, Maintenance
Procedures for Refrigeration System)

4. Remove the air inlet duct at the right side of

the splash plate (except for the right front).

5. Loosen the mounting bolts, nuts and adjusting

bolts of the power steering oil pump or the
generator.

6. Loosen and remove the drive belt. (P/S+A/C

or generator +A/C)

Caution:

The opening of each disassembled part of the
cycle system should be blocked immediately to
prevent the moisture and sundries from entering,
or else the moisture or sundries entering into the
refrigeration cycle system may reduce the
cooling effect and generate abnormal noise.

6. Perform the removal in the order shown in the

following table. Please prevent the
compressor oil from flowing out.

7. Perform the installation in reverse order of the

removal.

8. Adjust the drive belt (P/S+A/C or

generator+A/C). (Refer to the Adjustment of
Drive Belt, Drive Belt, Section B).

9. Perform the refrigeration system performance

test. (Refer to the Refrigeration System
Performance Test, Maintenance Procedures
for Refrigeration System)

Air flow mode
main linkage

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A/C System3A-25

Condenser pipe (high pressure)
Refer to the Installation Instruction
for Refrigeration Pipeline,
Removal/Installation of Refrigeration
Pi li

Condenser pipe (low pressure)
Refer to the Installation Instruction
for Refrigeration Pipeline,
Removal/Installation of Refrigeration
Pipeline.

Connector

A/C compressor
Refer to the Installation Instruction

Removal/Installation of Condenser

1. Disconnect the negative cable of the battery.

2. Drain the refrigerant out of the system. (Refer

to Recovering the Refrigerant, Maintenance
Procedures for Refrigeration System) (Refer
to Refrigerant Filling, Maintenance
Procedures for Refrigeration System)

3. Pull up the coolant tank.

4. Perform the removal in the order shown in the

following table. Please prevent the oil from
flowing out.

5. Perform the installation in reverse order of the

removal.

6. Perform the refrigeration system performance

test. (Refer to the Refrigeration System
Performance Test, Maintenance Procedures
for Refrigeration System)

Checking the Condenser

1. Check for any crack, damage or oil leakage. If

there is, replace the condenser.

2. Check whether the cooling fin is blocked by

the dust. If it is, remove the dust.

3. Check whether the cooling fin is bended. If it

is, correct it by using a flat-end screwdriver.

Removal/Installation of Refrigeration
Pipeline

1. Disconnect the negative cable of the battery.

2. Drain the refrigerant out of the system. (Refer

to Recovering the Refrigerant, Maintenance
Procedures for Refrigeration System) (Refer
to Refrigerant Filling, Maintenance
Procedures for Refrigeration System)

3. Perform the removal in the order shown in the

following table. Please prevent the oil from
flowing out.

4. Perform the installation in reverse order of the

removal.

5. Perform the refrigeration system performance

test. (Refer to the Refrigeration System
Performance Test, Maintenance Procedures
for Refrigeration System)

Control System

Removal/Installation of Blower Motor

Disconnect the negative cable of the battery.

2. Remove the glove box.

3. Perform the removal in the order shown in the

following table.

4. Perform the installation in reverse order of the

removal.

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A/C System3A-26

1 Connector
2 Blower

motor

Removal/Installation of Resistor

1. Disconnect the negative cable of the battery.

2. Remove the glove box.

3. Perform the removal in the order shown in the

following table.

4. Perform the installation in reverse order of the

removal.

Connector

Resistor

Removal/Installation of Ambient
Temperature Sensor

1. Disconnect the negative cable of the battery.

Remove the front bumper
(Removal/Installation of Front Bumper,
Bumpers)

3. Perform the removal in the order shown in the

following table.

4. Perform the installation in reverse order of the

removal.

Connector

Ambient temperature sensor

Checking the Ambient Temperature
Sensor

1. Remove the ambient temperature sensor.

2. Measure the temperature around the ambient

temperature sensor.

3. Measure the resistance between the ambient

temperature sensor pins.

4. If the resistor does not match with the figure,

replace the ambient temperature sensor.

Removal/Installation of Interior
Temperature Sensor

1. Remove the left lower panel.

2. Remove the interior temperature sensor from

the small cover plate.

3. Remove the wiring connector from the sensor.

4. Remove the sensor from the air duct.

Temperature

Resistance

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Airbags and Restraint System 3B-1

Chapter 17

Airbags and Restraint System

Table of Contents

Electrical Principle and Diagnosis for Airbags································································ 3B-2

Electrical Schematic for Airbags·········································································· 3B-2

Relevant Airbag Components ············································································· 3B-3

Airbag Fault Check ························································································· 3B-3

Airbag Fault Diagnosis ····················································································· 3B-3

List of Airbag System Faults ···················································································· 3B-4

Maintenance of Airbags ·························································································· 3B-18

Maintenance Procedures for Airbags ····································································· 3B-18

About checking the airbag module ············································································· 3B-23

About operating the airbag module ······································································· 3B-23

About operating the side airbag module ································································· 3B-23

About operating the SAS unit ············································································· 3B-24

Removal/Installation of Rear Row Seat Belts································································· 3B-25

Release Procedure of Airbag Modules and Pretensioner Seat Belts ································· 3B-26

Pretensioner seat belt ····························································································· 3B-29

Front passenger side airbag module ············································································ 3B-31

Pretensioner seat belt ······················································································· 3B-32

About the released airbag module or pretensioner seat belt··········································· 3B-33

Checking the SST Release Tool ················································································· 3B-33

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Airbags and Restraint System 3B-3

Relevant Airbag Components

Fault indicator lamp, red, located in the combination instrument, for indicating
the SRS airbag system status.

PAB front passenger airbag module, located under the instrument panel in front
of the front passenger, for protecting the front passenger by popping in case of
front impact

DAB driver airbag module, located in the middle of the instrument panel, for
protecting the driver by popping in case of front impact

SAB front side airbag modules, located inside the driver seat and the front
passenger seat, for protecting the driver and the front passenger by popping in
case of side impact

CAB side air curtain modules, located below the ceiling above the left and right
side wall, for protecting the front and rear occupants’ heads by popping out the
airbag in case of side impact

CLOCK SPRING, located below the steering wheel, for connecting the DFAB,
horn, steering wheel button and so on to the main harness

Airbag ECU, located at the central passage below the instrument panel, for
controlling the ignition of the airbag system and testing the entire system status

Airbag Fault Check

After the ignition switch is turned from OFF to ON (hereinafter referred to as turning on the
power switch), the airbag fault indicator lamp flickers 6 times and then goes out without
coming on again, indicating the airbag system is normal, which requires no maintenance to
the airbag system.

If the airbag status indicator lamp does not come on, or is always on or is flashing, after the
power switch is turned on, it is indicated there is fault in the airbag system, which requires
maintenance to the airbag system.

Airbag Fault Diagnosis

Read out the airbag system fault record by using the diagnostic instrument. Please refer to
the Operation Instruction for Diagnostic Instrument for its usage.

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Airbags and Restraint System 3B-4

List of Airbag System Faults

$9013

The driver’s front airbag short to ground

$9024

The driver’s front airbag short to power supply

$9035

The driver’s front airbag resistance low

$9046

The driver’s front airbag resistance high

$901A

The driver’s front airbag invalid

$9015

The front passenger front airbag short to ground

$9026

The front passenger front airbag short to power supply

$9037

The front passenger front airbag resistance low

$9048

The front passenger front airbag resistance high

$901C

The front passenger front airbag invalid

$9017

The driver seat belt pretensioner short to ground

$9028

The driver seat belt pretensioner short to power supply

$9039

The driver seat belt pretensioner resistance low

$9051

The driver seat belt pretensioner resistance high

$901E

The driver seat belt pretensioner invalid

$9018

The front passenger seat belt pretensioner short to ground

$9029

The front passenger seat belt pretensioner short to power supply

$9041

The front passenger seat belt pretensioner resistance low

$9052

The front passenger seat belt pretensioner resistance high

$901F

The front passenger seat belt pretensioner invalid

$9058

The driver seat belt buckle short to ground

$9065

The driver seat belt buckle short to power supply

$906A

The driver seat belt buckle invalid

$9059

The front passenger seat belt buckle short to ground

$9066

The front passenger seat belt buckle short to power supply

$906B

The front passenger seat belt buckle invalid

$9064

The front passenger seat cushion sensor short to ground

$905A

The front passenger seat cushion sensor short to power supply

$906F

The front passenger seat cushion sensor invalid

$9086

Power voltage too low

$9087

Power voltage too high

$9089

Ignition circuit cross-linked

$9091

Warning lamp error

$9093

Crash output error

$90E1

Driver seat belt warning error

$90E2

Front passenger seat belt warning error

$9095

Pretensioner tensioning in case of impact

$9098

Front impact occurs

$9088

Internal error

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Haima M3. A/C, Restraint System, Body Accessories, Electrical System. Manual - part 2