• | If the control A circuit of the recirculation actuator is short to ground, the following conditions will occur. |
- | The recirculation actuator will operate properly when recirculation is requested. |
- | The recirculation actuator will continually modulate between the outside air and recirculation positions when outside air is requested. |
• | If the control B circuit of the recirculation actuator is shorted to ground, the following conditions will occur. |
- | The recirculation actuator will operate properly when outside air is requested. |
- | The recirculation actuator will continually modulate between the outside air and recirculation positions when recirculation is requested. |
• | The condition may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections . |
• | Inspect the recirculation door and the recirculation actuator for the following conditions: |
- | A misaligned recirculation actuator. Refer to Recirculation Actuator Replacement . |
- | Broken or binding linkages |
- | A broken or binding recirculation door |
- | An obstruction that prevents the recirculation door from operating within its full range of motion |
- | Missing seals to the recirculation door |
- | Misaligned seals to the recirculation door |
Step | Action | Yes | No | ||||||||||||
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Schematic Reference: HVAC Schematics Connector End View Reference: HVAC Connector End Views DEFINITION: Air recirculation is inoperative or is always ON. | |||||||||||||||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |||||||||||||
2 |
Do you hear an audible difference in the airflow when the recirculation switch is placed in the recirculation position? | Go to Diagnostic Aids | Go to Step 3 | ||||||||||||
3 |
Does the drive shaft of the recirculation actuator rotate? | Go to Diagnostic Aids | Go to Step 4 | ||||||||||||
4 |
Does the drive shaft of the recirculation actuator rotate? | Go to Step 12 | Go to Step 5 | ||||||||||||
5 |
Does the test lamp illuminate? | Go to Step 6 | Go to Step 13 | ||||||||||||
6 |
Does the test lamp illuminate with either command? | Go to Step 7 | Go to Step 8 | ||||||||||||
7 |
Does the test lamp illuminate with either command? | Go to Step 10 | Go to Step 9 | ||||||||||||
8 | Test the control A circuit of the recirculation actuator for an open, a high resistance, a short to ground, or a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 12 | ||||||||||||
9 | Test the control B circuit of the recirculation actuator for an open, a high resistance, a short to ground, or a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 12 | ||||||||||||
10 | Inspect the recirculation door and the recirculation actuator for the following conditions:
Did you find and correct the condition? | Go to Step 16 | Go to Step 11 | ||||||||||||
11 | Inspect for poor connections at the harness connector of the recirculation actuator. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 16 | Go to Step 14 | ||||||||||||
12 | 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 16 | Go to Step 15 | ||||||||||||
13 | Repair the ignition 3 voltage circuit of the recirculation actuator. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 16 | -- | ||||||||||||
14 | Replace the recirculation actuator. Refer to Recirculation Actuator Replacement . Have you finished the replacement? | Go to Step 16 | -- | ||||||||||||
15 | Replace the HVAC control module. Refer to Control Module References for replacement, setup and programming. Have you finished the replacement? | Go to Step 16 | -- | ||||||||||||
16 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |