Schematic Reference: HVAC Schematics

Connector End View Reference: HVAC Connector End Views

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

1. Turn ON the ignition, with the engine OFF.
2. Place the blower motor switch in the OFF position.

Is the blower motor OFF?

Go to Step 3

Go to Blower Motor Always On

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 in each speed position?

Go to Step 5

Go to Blower Motor Malfunction

1. With a scan tool, observe the Mode Switch parameter in the Heating and Air Conditioning data list.
2. Activate the mode switch.

Does the scan tool indicate that the Mode Switch parameter changes state?

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 bi-level position.
3. Place the recirculation switch in the ON position.
4. Observe the drive shaft of the recirculation actuator.
5. Place the recirculation switch in the OFF position.

Does the recirculation door move from the recirculation position to the outside air position?

Go to Diagnostic Aids

Go to Air Recirculation Malfunction

Inspect for poor connections at the harness connector of the HVAC control module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

Go to Step 9

Go to Step 8

Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 9

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2