Chrysler Town and Country 2003 Owner's Manual page 293

*HVAC SYSTEM TEST —
TEST
5 NOTE: Active codes must be resolved before diagnosing stored codes.
NOTE: Anytime a code becomes active proceed to the conclusion question.
NOTE: If multiple codes appear, diagnose those that relate to a short circuit
first.
Start the engine.
Press the ATC Power switch on.
Turn the front blower control to the low speed position.
If equipped, turn the rear blower control to the Rear Control position.
Set the Driver, Pass, and, if equipped, Rear temperature controls to 60°F (16°C).
Monitor the DRBIII for active ATC DTCs while performing the following test steps.
Press the recirculation mode switch on, wait 30 seconds, and then press it off.
Press the A/C mode switch on, wait 30 seconds, and then press it off.
Press the rear defogger switch on, wait 30 seconds, and then press it off.
Set the Driver temperature control to the max heat setting, wait 30 seconds, and then
set it to the max cool setting. Repeat this step for the Pass and, if equipped, Rear
temperature controls.
Turn the mode control to each position for 30 seconds and then turn it back to the
panel position.
Press the Auto HI switch, wait 30 seconds, and then press the Auto LO switch. When
function is complete, turn the front blower control to the low speed position.
If equipped, on the Rear ATC Control, set the rear temperature control to the max
heat setting, wait 30 seconds, and then set it to the max cool setting.
If equipped, on the Rear ATC Control, turn the mode control to each position for 30
seconds.
With the DRBIII in ATC, Miscellaneous, reset the ATC.
Does the DRBIII display any active ATC DTCs?
Yes → Return to the symptom list and choose the symptom(s)
→ Go To 6
No
AUTOMATIC TEMPERATURE CONTROL
Continued
ACTION
Perform BODY VERIFICATION TEST - VER 1.
269
APPLICABILITY
All