B105B

B105B-RECIRCULATION DOOR CONTROL CIRCUIT OPEN





For a complete wiring diagram refer to Diagrams/Electrical.

Theory of Operation

The A/C Heater Control drives the Recirculation Door Actuator via the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver 2 circuit.

- When Monitored:

With the ignition on.

- Set Condition:

If the Recirculation Door Actuator's electrical circuit is open.





Diagnostic Test

1. ACTIVE DTC(S) PRESENT

Turn the ignition on.

Using the A/C Heater Control, actuate the Recirculation Door.

With the scan tool, check for DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To2

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 the BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK (C32) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN





Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Disconnect the Recirculation Door Actuator harness connector.

Measure the resistance of the (C32) Recirculation Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector.

Does the ohm meter read open circuit?

Yes

- Repair the (C32) Recirculation Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3.

3. CHECK (C154) COMMON DOOR DRIVER 2 CIRCUIT FOR AN OPEN





Measure the resistance of the (C154) Common Door Driver 2 circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector.

Does the ohm meter read open circuit?

Yes

- Repair the (C154) Common Door Driver 2 circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4.

4. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE





Reconnect the Recirculation Door Actuator harness connector.

Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C154) Common Door Driver 2 circuit in the A/C Heater Control C1 harness connector.

Is the resistance between 30 and 40 ohms?

Yes

- Replace the Recirculation Door Actuator.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

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