Test Description
WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. 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.
- 2. If more than one DTC is set, observe all of the Door Actual parameters for each corresponding DTC. If the door actual parameter is not out of range, then the concern is with the control portion of the actuator.
- 7. The purpose of this step is to try to determine which actuator is internally shorted or if the auxiliary HVAC control module is creating the fault. After DTC are cleared, it can take up to 4 minutes for DTC to set.
- 8. After DTC are cleared, it can take up to 4 minutes for DTC to set. The purpose of this step is to try to determine which actuator is internally shorted or if the auxiliary HVAC control module is creating the fault. If both DTCs return the auxiliary control module is internally shorted.
- 10. The purpose of this step is to try to determine which actuator is internally shorted or if the auxiliary HVAC control module is creating the fault. After DTC are cleared, it can take up to 4 minutes for DTC to set.
- 11. After DTC are cleared, it can take up to 4 minutes for DTC to set. The purpose of this step is to try to determine which actuator is internally shorted or if the auxiliary HVAC control module is creating the fault. If both DTCs return the auxiliary HVAC control module is internally shorted.
- 14. If the scan tool does not display all three DTC, then the answer is No.
- 15. If the scan tool does not display both DTC, then the answer is No.
- 18. If the fused jumper opens, then the appropriate signal circuit is shorted to a power.
- 19. If the scan tool parameter reads lower than 5 Counts then the appropriate signal circuit is shorted to a ground.
- 20. This step tests the 5 volt reference circuit. Test can be done with any auxiliary actuator. The auxiliary air temperature actuator can be accessed the quickest.
- 22. If the scan tool displays one DTC when an actuator is disconnected, then the actuator that was disconnected is the area of the fault.
- 29. The procedure for both auxiliary mode actuators are within the same replacement procedure.
- 30. After a circuit repair, a recalibration of the actuators must be performed to ensure proper performance from the auxiliary HVAC system.