B1009

B1009-RECIRCULATION SWITCH REQUEST INPUT CIRCUIT/PERFORMANCE

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

The switch input changes when the switch is pushed down. A stored DTC indicates that the recirculation switch was stuck in a pushed position for more than 10 minutes, but has since returned to its normal state. An active DTC indicates that the recirculation switch is stuck in a pushed position.

- When Monitored:
With the ignition on.

- Set Condition:
If the recirculation switch is detected in a pushed position for more than 10 minutes.





Diagnostic Test

1. VERIFY THE DTC IS STILL ACTIVE
Turn the ignition on.
With the scan tool, erase HVAC DTCs.
Turn the ignition off, wait 10 seconds, and then turn the ignition on. Wait 10 minutes before proceeding.
With the scan tool, read HVAC DTCs.
Does the scan tool display this DTC?

Yes

- Go to 2.

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

2. CHECK FOR NORMAL RECIRCULATION SWITCH AND STATUS INDICATOR FUNCTION
Set the Blower control to any position except Off.
Set the Mode control to any position except Auto.
Press the Recirculation switch on and off several times while observing the Recirculation status indicator.
Does the Recirculation status indicator turn on and off?

Yes

- Go to 4.

No

- Go to 3.

3. INSPECT FOR OBJECT OR SUBSTANCE CAUSING THE RECIRCULATION SWITCH TO STAY OR STICK IN A PUSHED POSITION
Inspect the A/C Heater Control for anything that would cause the Recirculation switch to stay or stick in a pushed position.
Is anything present that would cause the Recirculation switch to stay or stick in a pushed position?

Yes

- Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Go to 4.

4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE
Inspect the A/C Heater Control for damage.
Is the A/C Heater Control damaged?

Yes

- Replace the A/C Heater Control.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.