Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM2006CARAVAN SE, 3.3 EREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTBODY INTERIORBODY DIAGNOSTIC PROCEDURES - INTRODUCTIONSYSTEM DESCRIPTION AND FUNCTIONAL OPERATIONHEATING & A/C SYSTEMAUTOMATIC TEMPERATURE CONTROL (ATC)SYSTEM DIAGNOSTICS
2006 Dodge and Ram Caravan SE, 3.3 E
System Diagnostics
2006 Dodge and Ram Caravan SE, 3.3 ESECTION System Diagnostics
Fault detection is through active and stored Diagnostic Trouble Codes (DTCs)
- DTCs are displayed by the DRBIII®.
- Active DTCs are those which currently exist in the system. The condition causing the fault must be repaired in order to clear this type of DTC.
- Stored DTCs are those which occurred in the system since the ATC Module received the last "clear diagnostic info" message.
The AC Cooldown Test:
- is actuated with the DRBIII®.
- checks A/C system performance based on evaporator temperature sensor input.
- forces the ATC to initiate the Cabin Heater Activation request when the vehicle is equipped with a Diesel Cabin Heater Assist.WARNING: DO NOT OPERATE THE DCHA IN AN ENCLOSED AREA SUCH AS A GARAGE THAT DOES NOT HAVE EXHAUST VENTILATION FACILITIES. ALWAYS VENT THE DCHA's EXHAUST WHEN OPERATING THE DCHA. REFER TO VENTING THE DCHA'S EXHAUST UNDER CABIN HEATER FOR PROPER EXHAUST VENTING INSTRUCTIONS. FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN PERSONAL INJURY OR DEATH.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.