Climate Control Motor(S) Common 1 Control Circuit Open (Dual-Zone)

B1061-CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT OPEN (DUAL-ZONE)






For a complete wiring diagram refer to Diagrams/Electrical.

Theory of Operation

The A/C Heater Control drives the Driver Blend Door Actuator via the (C61) Blend Door Driver circuit and the (C34) Common Door Driver circuit. The A/C Heater Control drives the Passenger Blend Door Actuator via the (C33) Passenger Blend Door Driver circuit and the (C34) Common Door Driver circuit. The A/C Heater Control drives the Mode Door 1 (Panel to Floor) Actuator via the (C29) Mode Door 1 Driver circuit and the (C34) Common Door Driver circuit. The A/C Heater Control drives the Mode Door 2 (Defrost to Floor) Actuator via the (C801) Mode Door 2 Driver circuit and the (C34) Common Door Driver circuit. The A/C Heater Control drives the Recirculation Door Actuator via the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver circuit. All of the door actuators share the (C34) Common Door Driver circuit. Inside the A/C Heater Control, each door actuator has its own unique driver, but all share a single common door driver circuit. Due to the shared circuitry similar DTCs can set at the same time for multiple actuators depending upon the type of short, its location, and the direction the actuator is moving when the short is present.

- When Monitored:

When the Actuator DTC Detection Test is executed.

- Set Condition:

If the (C34) Common Door Driver circuit is open.






Diagnostic Test

1. CHECK DRIVER BLEND DOOR ACTUATOR CIRCUIT RESISTANCE





Turn the ignition off.

Disconnect the A/C Heater Control C1 harness connector.

Measure the resistance between the (C61) Blend Door Driver circuit and the (C34) Common Door Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 70 ohms?

Yes

- Go To 2

No

- Go To 7

2. CHECK PASSENGER BLEND DOOR ACTUATOR CIRCUIT RESISTANCE





Measure the resistance between the (C33) Passenger Blend Door Driver circuit and the (C34) Common Door Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 70 ohms?

Yes

- Go To 3

No

- Go To 8

3. CHECK MODE DOOR 1 (PANEL TO FLOOR) ACTUATOR CIRCUIT RESISTANCE





Measure the resistance between the (C29) Mode Door 1 Driver circuit and the (C34) Common Door Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 70 ohms?

Yes

- Go To 4

No

- Go To 9

4. CHECK MODE DOOR 2 (DEFROST TO FLOOR) ACTUATOR CIRCUIT RESISTANCE





Measure the resistance between the (C801) Mode Door 2 Driver circuit and the (C34) Common Door Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 70 ohms?

Yes

- Go To 5

No

- Go To 10

5. CHECK RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE





Measure the resistance between the (C32) Recirculation Door Driver circuit and the (C34) Common Door Driver circuit in the A/C Heater Control C1 harness connector.

Is the resistance below 70 ohms?

Yes

- Go To 6

No

- Go To 11

6. RUN THE ACTUATOR DTC DETECTION TEST

Reconnect the A/C Heater Control C1 harness connector.

Turn the ignition on.

With the scan tool in HVAC, select System Tests and then select Actuator DTC Detection. When the test is complete, select View DTCs.

Does the scan tool only display: B1061-CLIMATE CONTROL MOTOR(S) COMMON 1 CONTROL CIRCUIT OPEN?

Yes

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

No, Other DTC(s) Displayed

- Diagnose and repair the other DTC(s). If multiple DTCs are present, beginning with the passenger blend door, diagnose and repair all short high DTCs and then all short low DTCs.

No, And No DTCs Displayed

- Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Repair as necessary.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

7. CHECK (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN TO THE DRIVER BLEND DOOR ACTUATOR





Disconnect the Driver Blend Door Actuator harness connector.

Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Driver Blend Door Actuator harness connector.

Is the resistance below 5.0 ohms?

Yes

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

No

- Repair the (C34) Common Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

8. CHECK (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN TO THE PASSENGER BLEND DOOR ACTUATOR





Disconnect the Passenger Blend Door Actuator harness connector.

Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Passenger Blend Door Actuator harness connector.

Is the resistance below 5.0 ohms?

Yes

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

No

- Repair the (C34) Common Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

9. CHECK (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN TO THE MODE DOOR 1 ACTUATOR





Disconnect the Mode Door 1 Actuator harness connector.

Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 1 (Panel to Floor) Actuator harness connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Mode Door 1 (Panel to Floor) Actuator.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (C34) Common Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

10. CHECK (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN TO THE MODE DOOR 2 ACTUATOR





Disconnect the Mode Door 2 Actuator harness connector.

Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Mode Door 2 (Defrost to Floor) Actuator harness connector.

Is the resistance below 5.0 ohms?

Yes

- Replace the Mode Door 2 (Defrost to Floor) Actuator.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Repair the (C34) Common Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

11. CHECK (C34) COMMON DOOR DRIVER CIRCUIT FOR AN OPEN TO THE RECIRCULATION DOOR ACTUATOR





Disconnect the Recirculation Door Actuator harness connector.

Measure the resistance of the (C34) Common Door Driver circuit between the A/C Heater Control C1 harness connector and the Recirculation Door Actuator harness connector.

Is the resistance below 5.0 ohms?

Yes

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

No

- Repair the (C34) Common Door Driver circuit for an open.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test