Chrysler Town and Country 2003 Owner's Manual page 337

CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE) —
TEST
2 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.
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
While back probing, measure the voltage of the Cabin Heater Assist Control circuit
in the In-Line C330 harness connector.
Is battery voltage present?
Yes → Go To 3
→ Go To 5
No
3 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.
Turn the ignition off.
Disconnect the battery in accordance with the Service information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the In-Line C330 harness connector.
Measure the resistance of the Cabin Heater Assist Control circuit between the
In-Line C330 harness connector and the IPM C3 harness connector.
Is the resistance below 5.0 ohms?
Yes → Go To 4
→ Repair the Cabin Heater Assist Control circuit for an open.
No
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.
Turn the ignition off.
Disconnect the battery in accordance with the Service information.
Remove the FCM in accordance with the Service Information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the IPM C3 harness connector.
Measure the resistance of the Cabin Heater Assist Control circuit in the IPM
(between IPM Cavity 11 for the C3 harness connector and IPM Cavity 15 for the FCM
connector).
Is the resistance below 5.0 ohms?
Yes → Replace the FCM in accordance with the Service Information.
→ Replace the IPM in accordance with the Service Information.
No
ACTION
Perform CABIN HEATER VERIFICATION TEST - VER 1.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
313
CABIN HEATER
Continued
APPLICABILITY
All
All
All