Diagnostic Aids
| • | The condition may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections . |
| • | Inspect the air delivery system for the following conditions: |
| - | An obstruction to the airflow |
| - | Air leaks |
| - | Misaligned air ducts |
| - | Broken or binding linkages or doors |
| • | If the scan tool indicates that the Door Actual parameter is 5-10 counts from the Commanded Door parameter, then perform the recalibration procedure for the HVAC door actuators. Refer to Actuator Recalibration . |
Step | Action | Yes | No |
|---|---|---|---|
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 |
Does the scan tool indicate that the Recirculate Switch Parameter changes state? | Go to Diagnostic Aids | Go to Step 3 |
3 | 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 5 | Go to Step 4 |
4 | Replace the HVAC control module. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 5 | -- |
5 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2 |
