Dodge Ram 2004, Service Manual

Page: 417 / 642

TEST ACTION APPLICABILITY
4 Which door did customer ID as faulty? All
Mode Doors
Go To 5
Passenger Blend Door
Go To 6
Driver Blend Door
Go To 7
Recirculation Door
Go To 8
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? All
Yes
→
Test Complete.
No
→
Remove door actuators from A/C-Heater Housing Assy. By hand,
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.
6 Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Move the passenger blend control to the full hot position.
Move the passenger blend control to the full cold position, in 25% increments, while
checking for a change in airflow air temperature coming from the passenger’s panel
vents.
Does the airflow air temperature change with respect to the position of the blend
control? All
Yes
→
Test Complete.
No
→
Remove door actuator from A/C-Heater Housing Assy. By hand,
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.
403
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER -- DUAL-ZONE
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Continued