Caravan FWD V6-3.8L VIN L (1999)
Control Assembly: Testing and Inspection
Calibration -- May Be Needed After Replacing Control Unit
GENERAL INFORMATION
If the Heating Ventilation and Air Conditioning (HVAC) control module is replaced, the Calibration Diagnostic and Cooldown tests will need to be
performed. Once this group of tests have successfully passed, they can be performed individually. The engine must be running during the test to
provide hot coolant for the heater, A/C compressor operation and to assure that the actuators are calibrated correctly. The HVAC control module is
capable of troubleshooting the system in approximately 120 seconds. If a condition is detected, an error code is displayed. The error code cannot be
erased until the condition is repaired and the diagnostic test is performed. Check wiring before replacing components.
CAUTION: Do not remove the actuators from the Heater-A/C unit assembly with power applied. Removal should only be done with the Ignition
OFF. The actuators have no mechanical stops to limit the travel. If the actuator rotates and is not connected to the unit assembly, it will become out of
calibration.
Radio Bezel and HVAC Control
Radio Bezel and HVAC Control w/Rear Blower and Zone Control
ACTUATOR CALIBRATION
Mode, Blend and Zone (if equipped) door calibration compensates for mechanical variations in the actuators, HVAC control module and its linkages.
In vehicle calibration can be entered from the control's front panel. If the REAR WIPE and INTERMITTENT LED's flash simultaneously when
Ignition is cycled ON, the actuators have not been calibrated or during the previous calibration a failure occurred. Diagnostics will always occur
during Calibration Diagnostic and Cooldown test.
