Chrysler Town and Country 2003 Owner's Manual page 317

B1802 POWER SUPPLY OUT OF RANGE: LOW VOLTAGE THRESHOLD —
Continued
TEST
5 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.
Make sure that the Cabin Heater Assist C1 harness connector is connected to the
DCHA.
Connect a suitable voltmeter to the vehicle's battery. Position the voltmeter where it
can be monitored while operating the DRBIII .
Turn the ignition on.
On MTC, set the Blend control to the max cool position.
On ATC, set the Driver temperature control to LO (max cool).
Turn the ATC's or MTC's Power switch off.
Start the engine.
Allow the engine to idle.
Turn the ATC's or MTC's Power switch on.
Turn the Blower control to the high speed position.
CAUTION: Do not activate the DCHA Field Mode Test with the engine off.
Failure to follow these instructions may result in internal damage to the
DCHA Heater Module.
NOTE: Do not disconnect the vehicle's battery or the DCHA's main power
supply while the DCHA is in operation or in run-down mode. Failure to
follow these instructions may result in excess emissions from the DCHA
during heater operation.
With the DRBIII in Cabin Heater, Systems Tests, select Field Mode and press Enter.
The test will run for approx 8.5 minutes.
On MTC, set the Blend control to the max heat position.
On ATC, set the Driver temperature control to HI (max heat).
With the DRBIII
voltmeter while the Field Mode Test is running. Upon completion of the Field Mode
Test proceed as follows:
Turn the Blower control off and turn the ATC's or MTC's Power switch off.
Turn the engine off.
Was there more than 1.5 volts difference between Operating & battery voltage during
the test?
Yes → Repair the high resistance in the Fused B+ circuit.
→ Replace the DCHA Heater Module in accordance with the Service
No
ACTION
in Sensors, monitor the DCHA Operating Voltage and the
Perform CABIN HEATER VERIFICATION TEST - VER 1.
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
293
CABIN HEATER
APPLICABILITY
All