Schematic Reference: HVAC Schematics

Connector End View Reference: HVAC Connector End Views

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

Did you review the HVAC operation and perform the necessary inspections?

Go to Step 2

Go to Symptoms - HVAC Systems - Automatic

1. Turn ON the ignition, with the engine OFF.
2. Place the front auxiliary HVAC control assembly blower switch in the OFF position.
3. Place the console auxiliary HVAC control module blower control in the OFF position.

Is the auxiliary blower motor OFF?

Go to Step 3

Go to Blower Motor Always On

3

Place the front auxiliary control assembly blower switch in each speed position.

Does the auxiliary blower motor operate at all?

Go to Step 4

Go to Blower Motor Inoperative

4

Does the auxiliary blower motor operate correctly for each speed position?

Go to Step 5

Go to Blower Motor Malfunction

5

1. Place the front auxiliary HVAC control assembly blower control in the max. speed position.
2. Place the front auxiliary HVAC control assembly mode control in each mode position.

Does the auxiliary mode actuator operate correctly for each mode position?

Go to Step 6

Go to Step 7

6

1. Place the front auxiliary HVAC control assembly blower control in the Aux. control position.
2. Place the console HVAC control assembly blower control in the max. speed position.
3. Place the console HVAC control module mode control in each mode position.

Does the auxiliary mode actuator operate correctly for each mode position?

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

Go to Step 10

Test the mode door control - auxiliary circuit of the front auxiliary HVAC control assembly for an open, a high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 8

1. Disconnect the electrical connector from the front HVAC control assembly.
2. Test for resistance between the mode door control - auxiliary terminal and the low reference terminal of the front HVAC control assembly.
3. Place the front auxiliary HVAC control assembly mode control to each mode position.

Does the resistance change between each selected mode position?

Go to Step 10

Go to Step 9

Inspect for poor connections at the harness connector of the front auxiliary HVAC control assembly. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 13

Go to Step 11

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

Did you find and correct the condition?

Go to Step 13

Go to Step 12

Replace the front auxiliary HVAC control assembly . Refer to Rear Seat Audio Control Replacement in Entertainment.

Did you complete the replacement?

Go to Step 13

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Replace the auxiliary HVAC control module. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 13

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Operate the system in order to verify the repair.

Did you correct the condition?

System OK

Go to Step 2