Recirc Switch Fault (MTC)

RECIRC SWITCH FAULT (MTC)

For a complete wiring diagram Consult Diagrams/Electrical

Theory of Operation

The Recirc mode switch input changes when the switch is pushed down. A stored DTC indicates that the Recirc mode 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 Recirc mode switch is stuck in a pushed position. An active DTC will prevent proper Recirc mode switch and status indicator function.

- When Monitored:
With the ignition on.

- Set Condition:
If the Recirc mode switch stays in a pushed position for more than 10 minutes.





Diagnostic Test

1. VERIFY THAT THE DTC IS STILL ACTIVE
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 this DTC reset?

Yes

- Go To 2
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.

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

3. CHECK FOR NORMAL RECIRC MODE SWITCH & STATUS INDICATOR FUNCTION
Turn the ignition on.
Press the Power switch on.
Set the Blower control to any position except Off.
Press the Recirc mode switch on and off several times while observing the Recirc status indicator.
Does the Recirc status indicator turn on and off?

Yes

- Go To 1

No

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

4. INSPECT THE A/C HEATER CONTROL FOR DAMAGE
Turn the ignition off.
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

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