Schematic Reference: HVAC Schematics

DEFINITION: Air does not flow correctly from the air distribution outlets.

Did you perform the HVAC Diagnostic System Check?

Go to Step 2

Go to Diagnostic System Check - HVAC Systems - Manual

1. Start the engine.
2. Place the mode switch in the OFF position.

Is the blower motor OFF?

Go to Step 3

Go to Blower Motor Always On

1. Place the mode switch in the vent position.
2. Place the blower motor switch in each speed position.

Does the blower motor operate in any of the speed positions?

Go to Step 4

Go to Blower Motor Inoperative

Does the blower motor operate at the desired speed?

Go to Step 5

Go to Blower Motor Malfunction

Is the vehicle equipped with air conditioning?

Go to Step 6

Go to Step 7

1. Place the blower motor switch in the maximum speed position?
2. Place the mode switch in the MAX position.

Does the recirculation door move to the recirculation position?

Go to Step 7

Go to Vacuum Control System Diagnostic

Place the mode switch in each mode position.

Does the air flow from the proper air distribution outlets in each mode position?

Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems

Go to Vacuum Control System Diagnostic