Test Description

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

3. This step checks for a default action by the actuator. The actuator will default to 128 counts if the air temperature door position circuit is open, shorted to ground, or shorted to voltage. It will also default to this value if the low reference circuit or the 5 volt reference circuit is open.

4. Tests for the air temperature actuator operating within its specified range.

5. Tests the air temperature actuator ground circuit for an open.

6. Tests the air temperature actuator 5 volt reference circuit for a short to ground, short to voltage, or an open.

7. Tests the air temperature door position signal circuit for an open, high resistance, short to ground, or short to voltage.

Fig 1: DTC B0363 Or B0367 (Steps 1 - 8)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B0363 Or B0367 (Steps 9 - 13)

Courtesy of GENERAL MOTORS CORP.