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 HVAC Diagnostic System Check? | Go to Step 2 | |||||||||
2 |
Important:: In order to execute the HVAC Recalibration command, the scan tool disrupts keep alive memory (KAM) causing DTC B1652 (Loss of KAM) to be set as history.
Does the scan tool display DTC B1340, B1341, B1343, or B1344? | Go to Step 3 | |||||||||
3 |
Does the recirculation door operate properly? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 | ||||||||
4 |
Does the scan tool indicate that the Air Inlet Dr. Commanded parameter changes for each change in selected position? | Go to Step 6 | Go to Step 5 | ||||||||
5 |
Does the scan tool indicate that the Air Inlet Commanded parameter changes? | Go to Step 12 | Go to Step 10 | ||||||||
6 | Test the battery positive voltage circuit and the low reference circuit of the recirculation actuator for high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 7 | ||||||||
7 | Inspect the air delivery system for the following conditions:
Did you find and correct the condition? | Go to Step 15 | Go to Step 8 | ||||||||
8 | Inspect the recirculation door and the recirculation actuator for the following conditions.
Did you find and correct the condition? | Go to Step 15 | Go to Step 9 | ||||||||
9 | Inspect for poor connections at the harness connector of the recirculation actuator. 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 15 | Go to Step 11 | ||||||||
10 | 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 in Wiring Systems. Did you find and correct the condition? | Go to Step 15 | Go to Step 13 | ||||||||
11 | Inspect for poor connections at the harness connector of the instrument panel integration module (IPM). 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 15 | Go to Step 14 | ||||||||
12 |
Important: Perform the recalibration procedure for the recirculation actuator. Replace the recirculation actuator. Refer to Recirculation Actuator Replacement . Did you complete the replacement? | Go to Step 15 | -- | ||||||||
13 | Replace the HVAC control module. Refer to HVAC Control Module Replacement . Did you complete the replacement? | Go to Step 15 | -- | ||||||||
14 |
Important: Perform the recalibration procedure for the IPM. Replace the IPM. Refer to Instrument Panel Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 15 | -- | ||||||||
15 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 3 |