Chrysler Town and Country 2003 Owner's Manual page 328

CABIN HEATER
B1820 DOSING PUMP CIRCUIT: OPEN OR SHORT TO BATTERY —
Continued
TEST
4 WARNING: DO NOT OPERATE THE DCHA IN AN ENCLOSED AREA SUCH
AS A GARAGE THAT DOES NOT HAVE EXHAUST VENTILATION FACILI-
TIES. ALWAYS VENT THE DCHA's EXHAUST WHEN OPERATING THE
DCHA. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN
PERSONAL INJURY OR DEATH.
WARNING: ALLOW THE DCHA ASSEMBLY TO COOL BEFORE PERFORM-
ING A COMPONENT INSPECTION/REPAIR/REPLACEMENT. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Dosing Pump harness connector.
Disconnect the Dosing Pump rubber insulators from the splash shield.
Measure the resistance of the Dosing Pump.
Is the resistance between 3.0 and 10.0 ohms?
Yes → Replace the DCHA Heater Module in accordance with the Service
→ Replace the Dosing Pump in accordance with the Service Infor-
No
ACTION
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
mation.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
304
APPLICABILITY
All