HVAC: Diagnosis Subaru Forester SG

INSPECTION

Inspection of Auto A/C Brush-less Motor

Operation

Connect the motor connector terminal 5 from the battery to the positive (+) lead and terminal 2 and 1 at the same type to the negative (-) lead. Make sure the motor runs smoothly.

Scheme 30

Scheme 31

1. Remove the glove box. Refer to «REMOVAL»(ref-200811-S42774016482005102300000) , Glove Box.
2. Disconnect the blower resistor connector.
3. Loosen the two screws to remove blower resistor.

1. Confirm that no dust or insects are found on the condenser fins. Air-blow or flush fins with water as needed.
2. Confirm that no oil leaks from condenser. If a failure is found, replace the condenser with a new one.

Note. If cracking, damage, or swelling is found on a hose, replace it with a new one.

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Scheme 33

1. (1) - (2): Continuity exists.
2. (3) - (4): Continuity exists.
3. (3) - (5): No continuity.

While applying battery voltage to the terminal between (1) and (2), check continuity between (3) and (5).

If no continuity exists, replace the relay with a new one.

Scheme 34

Scheme 35

1. Connect the manifold gauge to the service valve on the high-pressure side.
2. Remove the pressure switch harness connector. Using a circuit tester, inspect the ON-OFF operation of the pressure switch.

Scheme 36

1. Open the front hood.
2. Disconnect the ground cable from battery.
3. Disconnect the ambient sensor connector.
4. Remove the ambient sensor from radiator lower panel.

Refer to SELF-DIAGNOSTICS - 2.5L .

Scheme 37

1. Disconnect the ground cable from battery.
2. Disconnect the sunload sensor connector (A). CAUTION: Be careful not to damage the sensors and interior trims when removing them.

Refer to SELF-DIAGNOSTICS - 2.5L .

Scheme 38

1. Disconnect the ground cable from battery.
2. Remove the center console panel. Refer to «REMOVAL»(ref-200811-S29558660072005102300000) , Instrument Panel Assembly.
3. Loosen the two screws to remove the center air vent grille.

Scheme 39

1. Remove the side vent grille by prying four points.

The direction and amount of air should be adjusted smoothly.

The adjustment should be kept in each position.