Manual Temperature Control

B103D - Rear Mode Door Control Circuit Open






For a complete wiring diagram, refer to.

Theory of Operation

The A/C heater control drives the rear mode door actuator via the rear mode door driver circuit and the rear common door driver circuit. Both of the rear door actuators share the rear common door driver circuit. In addition, the rear mode door actuator and the rear blend door actuator share a driver inside the A/C heater control. Due to the shared circuitry similar DTCs can set at the same time for multiple actuators depending upon the location of the open circuit and the direction the actuator is moving when the open circuit condition is present.

• When Monitored: With the ignition on.

• Set Condition: If the rear mode door actuator driver circuit is open.






• This DTC must be active for the results of this test to be valid. Do not perform this test if this DTC is stored.

Test Step 1 - Check Rear Mode Door Driver Circuit for an Open






• Turn the ignition OFF.

• Disconnect the A/C heater control C1 harness connector.

• Disconnect the rear mode door actuator harness connector.

• Measure the resistance of the rear mode door driver circuit between the A/C heater control C1 harness connector and the rear mode door actuator harness connector.

Is the resistance less than 5.0 ohms?

Yes

• Go to Test Step 2 => [ Test Step 2 - Check Rear Common Door Driver Circuit for an Open ]

No

• Repair the rear mode door driver circuit for an open.

• Perform the HVAC Verification Test. Refer to => Non-DTC Based Diagnostics. HVAC Verification Test

Test Step 2 - Check Rear Common Door Driver Circuit for an Open






• Measure the resistance of the rear common door driver circuit between the A/C heater control C1 harness connector and the rear mode door actuator harness connector.

Is the resistance less than 5.0 ohms?

Yes

• Go to Test Step 3 => [ Test Step 3 - Check Rear Mode Door Actuator Circuit Resistance ].

No

• Repair the rear common door driver circuit for an open.

• Perform the HVAC Verification Test. Refer to => Non-DTC Based Diagnostics. HVAC Verification Test

Test Step 3 - Check Rear Mode Door Actuator Circuit Resistance






• Measure the resistance between the rear mode door driver circuit and the rear common door driver circuit in the A/C heater control C1 harness connector.

Is the resistance between 30 and 40 ohms?

Yes

• Replace the A/C heater control.

No

• Replace the rear mode door actuator.

• Perform the HVAC Verification Test. Refer to => Non-DTC Based Diagnostics. HVAC Verification Test