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A/C OPERATION CHECK MODE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)]

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2016 – MX-5 – HVAC

A/C OPERATION CHECK MODE [CLIMATE CONTROL UNIT (MANUAL AIR CONDITIONER)]

  • The A/C operation check mode forcibly operates the output devices as shown in the operation check table regardless of the signals input to the climate control unit.

  • During an A/C operation check mode operation, indication in the display panel and the illumination of the indicator light on the switches are automatically controlled.

  • Determine the malfunctioning part by visual inspection, listening to the operation sound, placing a hand on the air vents, or checking that each transition is as indicated in the operation check table.

M-MDS display

Target part

Reference

Air Mix Actuator

  • Air mix actuator

  • Air mix door

(See Air mix actuator)

Air conditioning compressor

  • A/C compressor

(See A/C compressor)

Air Intake Actuator

  • Air intake actuator

  • Air intake door

(See Air intake actuator)

Blower Motor Speed

  • Blower motor

(See Blower motor)

Air Flow Mode Actuator

  • Airflow mode actuator

  • Airflow mode door

(See Airflow mode actuator)

Illumination of All Indicator Lights

  • Climate control unit

(See Indicator light)

Air mix actuator

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Air Mix Actuator” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

1

0 %

VENT

5th

ON

FRESH

OFF

2

100 %

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

1

Not Illuminated

Not illuminated

Illuminated

2

NOTE:

  • After approx. 22 s have elapsed, the operation step moves to the next step.

  • When the last step is finished, the operation is repeated from Step 1.

  • To prevent super-cooling, the magnetic clutch turns off despite the A/C forced override.

A/C compressor

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Air conditioning compressor” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

1

0 %

VENT

5th

ON

FRESH

OFF

2

OFF

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

1

Not illuminated

Not illuminated

Illuminated

2

Not illuminated

NOTE:

  • After the following times have elapsed, the operation step moves to the next step.

    • Step 1: Approx. 5 s

    • Step 2: Approx. 25 s

  • When the last step is finished, the operation is repeated from Step 1.

Air intake actuator

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Air Intake Actuator” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

1

0 %

VENT

5th

ON

FRESH

OFF

2

RECIRCULATE

3

OFF

FRESH

4

RECIRCULATE

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

1

Not illuminated

Not illuminated

Illuminated

2

Illuminated

3

Not illuminated

Not illuminated

4

Illuminated

NOTE:

  • After approx. 11 s have elapsed, the operation step moves to the next step.

  • When the last step is finished, the operation is repeated from Step 1.

  • To prevent super-cooling, the magnetic clutch turns off despite the A/C forced override.

Blower motor

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Blower Motor Speed” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

1

50 %

VENT

OFF

OFF

FRESH

OFF

2

1st

ON

3

3rd

4

5th

5

7th

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

1

Not illuminated

Not illuminated

Not illuminated

2

Illuminated

3

4

5

NOTE:

  • After approx. 4 s have elapsed, the operation step moves to the next step.

  • When the last step is finished, the operation is repeated from Step 1.

  • To prevent super-cooling, the magnetic clutch turns off despite the A/C forced override.

Airflow mode actuator

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Airflow Mode Actuator” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

1

50 %

VENT

5th

ON

FRESH

OFF

2

BI-LEVEL

3

HEAT

4

DEF/HEAT

5

DEFROSTER

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

1

Not illuminated

Not illuminated

Illuminated

2

3

4

5

NOTE:

  • After approx. 11 s have elapsed, the operation step moves to the next step.

  • When the last step is finished, the operation is repeated from Step 1.

  • To prevent super-cooling, the magnetic clutch turns off despite the A/C forced override.

Indicator light

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. After the vehicle is identified, select the following items from the initial screen of the M-MDS.

a. Select the “Body”.

b. Select the “EATC Operation Check”.

4. Select the “Illumination Of All Indicator Lights” from the screen menu.

5. Verify the A/C operation check mode according to the directions on the screen.

6. Select “Stop” to stop the A/C operation check. (See A/C operation check stop.)
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

50 %

VENT

OFF

OFF

FRESH

OFF

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

Illuminated

Illuminated

Illuminated

A/C operation check stop

1. If “Stop” is selected while the A/C operation check is operating, the A/C stops at the conditions shown in the table.
Operation

Step

Air mix actuator

Airflow mode actuator

Blower speed

Magnet clutch

Air intake actuator

Rear window defogger

50 %

VENT

OFF

OFF

FRESH

OFF

Indicator light

Step

Recirculate switch indicator light

Rear window defogger switch indicator light

A/C switch indicator light

Not illuminated

Not illuminated

Not illuminated

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