Dodge Ram 2004 Service Manual page 420

HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER -- SINGLE-
ZONE —
Continued
TEST
4 Which door did customer ID as faulty?
Mode Doors
Blend Door
Recirculation Door
5 Start the engine.
Turn the blower control to the high speed position.
NOTE: The Mode 1 door must be at its physical end of travel in the panel
position to correctly direct airflow to the Mode 2 door.
NOTE: The Mode 2 door must be at its physical end of travel in the
floor-defrost position to correctly direct airflow to the Mode 1 door.
Turn the mode control to each door position for a minimum of 30 seconds and check
for airflow from the corresponding vents.
Does air flow from the correct vents for each door position?
Yes → Test Complete.
→ Remove door actuators from A/C-Heater Housing Assy. By hand,
No
6 Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Turn the blend control to the full hot position.
Turn the blend control to the full cold position, in 25% increments, while checking for
a change in airflow air temperature coming from the panel vents.
Does the airflow air temperature change with respect to the position of the blend
control?
Yes → Test Complete.
→ Remove door actuator from A/C-Heater Housing Assy. By hand,
No
ACTION
Go To 5
Go To 6
Go To 7
attempt to rotate the door actuators in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
attempt to rotate the door actuator in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
406
APPLICABILITY
All
All
All