B1043

B1043-PANEL MODE DOOR 1 CONTROL CIRCUIT OPEN (ATC)





For a complete wiring diagram consult Diagrams/Electrical.


- When Monitored:
When actuator movement is requested.

- Set Condition:
If the (C266) Mode Door Driver circuit or the (C66) Mode Door Common Driver circuit is open.








Diagnostic Test


1. CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCs
Turn the ignition on.
With the scan tool, read active HVAC DTCs.
Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE DTCs?

Yes


- Diagnose and repair the DTC(s).


No


- Go To 2




2. CHECK THE MODE DOOR ACTUATOR CIRCUIT RESISTANCE




Turn the ignition off.
Disconnect the A/C Heater Control C2 harness connector.
Measure the resistance between the (C266) Mode Door Driver circuit and the (C66) Mode Door Common Driver circuit in the A/C Heater Control C2 harness connector.
Is the resistance above 70.0 ohms?

Yes


- Go To 3


No


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




3. CHECK THE (C266) MODE DOOR DRIVER CIRCUIT FOR AN OPEN




Disconnect the Mode Door Actuator harness connector.
Measure the resistance of the (C266) Mode Door Driver circuit between the Mode Door Actuator harness connector and the A/C Heater Control C2 harness connector.
Is the resistance below 5.0 ohms?

Yes


- Go To 4


No


- Repair the (C266) Mode Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.




4. CHECK THE (C66) MODE DOOR COMMON DRIVER CIRCUIT FOR AN OPEN




Measure the resistance of the (C66) Mode Door Common Driver circuit between the Mode Door Actuator harness connector and the A/C Heater Control C2 harness connector.
Is the resistance below 5.0 ohms?

Yes


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


No


- Repair the (C66) Mode Door Common Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test.