Cabin Heater Control Circuit Open (Active) - Chrysler Town and Country 2003 Owner's Manual

CABIN HEATER
Symptom:

CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE)

When Monitored and Set Condition:
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE)
When Monitored: When the DCHA system is off
Set Condition: The DCHA Low Side Driver inside the FCM expects to see a system
voltage of 13.8 volts through the DCHA relay coil when the DCHA system is off. This DTC
will set if the FCM sees a voltage below 3.5 volts on the Cabin Heater Assist Control circuit
during this time.
NO RESPONSE FROM CABIN HEATER MODULE
CABIN HEATER ASSIST CONTROL CIRCUIT OPEN TO IPM
IPM, OPEN CIRCUIT
FCM, OPEN CIRCUIT
FCM FAULT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED TO THE GROUND CIRCUIT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED TO GROUND
CABIN HEATER ASSIST CONTROL CIRCUIT OPEN
DCHA CONTROL UNIT FAULT
TEST
1 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 on.
With the DRBIII , attempt to communicate with the Cabin Heater Module.
Does the DRBIII display: No Response From Cabin Heater Module?
Yes → Refer to Communication for the related symptom.
→ Go To 2
No
POSSIBLE CAUSES
ACTION
Perform CABIN HEATER VERIFICATION TEST - VER 1.
312
APPLICABILITY
All