GM Service Manual Online
For 1990-2009 cars only

Function Test for Chevrolet Cavalier 1998

Control Settings

System Response

Step

Mode Lever

Temp Control

Fan Switch

Blower Speed

Vent Outlet

Heater Outlet

Defrost Outlets

See Remark

Rear Seat Heat Duct

1

VENT

COLD

OFF

Off

No Air Flow

No Air Flow

No Air Flow

--

No Air

2

VENT

COLD

LOW TO HIGH

Low to High

Air Flow

No Air Flow

No Air Flow

B, F, H, J

No Air

3

HEAT

HOT

HIGH

High

No Air Flow

Air Flow

Minimum Air Flow

A, D, E

Air

4

DEFROST

HOT

HIGH

High

No Air Flow

Minimum Air Flow

Air Flow

A, G

Min Air

5

BI-LEVEL

HOT

HIGH

High

Air Flow

Air Flow

No Air Flow

A

Air

6

BLEND

HOT

HIGH

High

No Air Flow

Air Flow

Air Flow

A

Air

REMARK A: Engagement of the detent must be felt in each mode.

REMARK B: Progressive blower speed increase must occur between LO, M1, M2 and HI.

REMARK C: Listen for the reduction of air noise.

REMARK D: Inspect the temperature level for full travel (Hot or Cold).

REMARK E: Inspect for air flow at the side window defogger outlets.

REMARK F: The temperature from the vent outlets should be the same as the temperature outside of the vehicle.

REMARK G: The temperature from the defroster outlets should be above the temperature outside of the vehicle.

REMARK H: Barrels and vanes must hold their position with the fan on high.

Inspect all of the A/C outlets for the following conditions:

    • Barrel rotation
    • Vane operation

Perform each step of the functional test shown on the illustration as one total operation of the roll test with the following conditions in place:

    • The window is up.
    • The door is closed.

Note any discrepancies from the remarks listed below.