Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Values | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Schematic Reference : HVAC Schematics DEFINITION: Air recirculation is inoperative or is always ON. | ||||||||||||||||
1 | Did you review the HVAC operation and perform the necessary inspections? | -- | Go to Step 2 | |||||||||||||
2 |
Does the recirculation door move to the correct position for each selection? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 | ||||||||||||
3 | Are all of the HVAC control assembly controls except for the blower motor inoperative? | -- | Go to Step 9 | Go to Step 4 | ||||||||||||
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 15 | ||||||||||||
5 | Test the ground circuit of the recirculation actuator for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 6 | ||||||||||||
6 |
Does the voltage measure near the specified values for each position? | 0.25 V Outside Air 10-12 V Recirc. | Go to Step 8 | Go to Step 7 | ||||||||||||
7 | Test the control circuit of the recirculation actuator. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 14 | ||||||||||||
8 | Inspect the recirculation door and the recirculation actuator for the following conditions:
Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 13 | ||||||||||||
Test the ignition 3 voltage circuit of the HVAC control assembly for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 10 | |||||||||||||
10 | Test the battery positive voltage circuit of the HVAC control assembly for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 11 | ||||||||||||
11 | Test the ground circuit of the HVAC control assembly for an open or for a high resistance. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 12 | ||||||||||||
12 | Test the blower motor OFF control at the HVAC control assembly for a short to voltage. Refer to Circuit Testing and to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 14 | ||||||||||||
13 | Inspect for poor connections at the harness connector of the recirculation actuator. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 16 | ||||||||||||
14 | Inspect for poor connections at the harness connector of the HVAC control assembly. Refer to Testing for Intermittent Conditions and Poor Connections and to Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 18 | Go to Step 17 | ||||||||||||
15 | Repair the ignition 3 voltage circuit of the recirculation actuator. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 18 | -- | ||||||||||||
16 | Replace the recirculation actuator. Refer to Recirculation Actuator Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- | ||||||||||||
17 | Replace the HVAC control assembly. Refer to Heater and Air Conditioning Control Replacement . Did you complete the replacement? | -- | Go to Step 18 | -- | ||||||||||||
18 | Operate the system in order to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 | ||||||||||||
