B10A1-PANEL MODE DOOR 2 ACTUATOR PERFORMANCE (ATC)

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

The A/C Heater Control monitors the door driver circuits during actuator operation for conditions that prevent proper door operation. If a pulse count error is detected the A/C Heater Control reports the fault as a Actuator Performance DTC. It is important to note that this DTC only indicates that a fault occurred while driving a door actuator and that additional testing is necessary to provide more details about the reported fault.

When Monitored:
When actuator movement is requested.
Set Condition:
If the A/C Heater Control detects a pulse count error while attempting to drive this door actuator.

Possible Causes

DOOR DRIVER CIRCUIT(S) SHORTED HIGH, SHORTED LOW, SHORTED TOGETHER, OPEN

DOOR ACTUATOR(S) BINDING, BROKEN

DOOR ACTUATOR(S) LINKAGE BINDING, DISCONNECTED, MISSING, BROKEN

A/C HEATER CONTROL

Diagnostic Test

1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE & CONTROL CIRCUIT OPEN DTCs

Turn the ignition on.
With the scan tool, read active HVAC DTCs.

Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE or XXXX CONTROL CIRCUIT OPEN DTCs?

Yes

Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of HVAC related symptoms.

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2. RUN ACTUATOR CALIBRATION TEST

With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs.

Does the scan tool display any DTCs?

Yes

Diagnose and repair the DTC(s). Refer to the Table of Contents in this Section for a complete list of HVAC related symptoms.

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3. CHECK MODE, BLEND & RECIRCULATION DOOR OPERATION

Start the engine.
Set the blower to high speed.
Verify that air flows from the correct vents while setting the Mode control to the Panel position, the Bilvel position, the Floor/Defrost position, and the Defrost position. Then, repeat in the opposite direction.
Set the Mode control to the Panel position.
Set the Driver Blend control to the full cold position.
Set the Passenger Blend control the full cold position.
Verify that the airflow air temperature changes while setting the Driver Blend control to the full hot position. Then, repeat in the opposite direction.
Verify that the airflow air temperature changes while setting the Passenger Blend control to the full hot position. Then, repeat in the opposite direction.
Set the Mode control to any position between Floor and Panel.
Press the Recirc function on. Verify that the sound of the airflow gets louder as the recirculation door opens to bring in recirculated air.
Press the Recirc function off. Verify that the sound of the airflow gets softer as the recirculation door closes to bring in fresh air.

Does each door operate properly?

Yes

The condition causing the fault has cleared at this time.

Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

Remove the door actuator of the affected door from the A/C Heater Housing Assembly. By hand, attempt to rotate the actuator in both directions. Inspect the A/C Heater Housing for damage, for disconnected, missing, or broken linkage, and for broken or binding doors. Repair as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).