Chrysler 2004 Concorde Service Manual page 1574

24 - 6 HEATING & AIR CONDITIONING
HEATING & AIR CONDITIONING (Continued)
These symptoms may be accompanied by the fol-
lowing Diagnostic Fault Codes (DTC's):
• Blend door feedback
• Blend door stall
• A/C Control Mode door input shorted to battery
• In-car temp sensor failure
• ATC messages not received
• Mode door stall
Check for the presence of DTC's with the DRB
III . If the symptoms and or DTC's listed above are
present, perform the following Repair Procedure:
With the vehicle at room temperature 10 to 27° C
(50 to 80° F), pull the M-1 fuse for five minutes to
erase any DTC's. Replace the fuse and start the vehi-
cle to recalibrate the HVAC system. Operate the
vehicle and A/C heater system to verify that symp-
toms and or DTC's are gone. If tapping noise or blend
stall/feedback DTC's re-occur, additional diagnosis
will be required.
STANDARD PROCEDURE - HVAC SYSTEM
CALIBRATION
This procedure may be performed on both the ATC
and MTC systems.
(1) Start engine and let run.
(2) If the vehicle has an ATC system, turn the con-
trol head on.
(3) Set the temperature controls to the full cold
position for two minutes.
(4) Set the temperature controls to the full heat
position for five minutes.
SPECIFICATIONS
A/C APPLICATION TABLE-ATC
Item Description
Vehicle LH - Intrepid,
Concorde,
300M, LHS
System R134a
w/expansion
valve
Compressor Nippondenso
10PA17
Freeze-up 2-wire
Control evaporator
temp sensor
Low psi Control A/C pressure
transducer, line
mounted
High psi Control
Item
Forced Recirc
Mode
Control head
Mode Door
Blend Door
Recirculation
Door
Blower Motor
Cooling Fans
Clutch
Control
Draw
Gap
DRB III
Reads
Actuators
A/C APPLICATION TABLE-MTC
Notes
Automatic
Temperature
Item
Control (ATC)
Vehicle
System
ND-8 PAG oil
BCM controlled,
Compressor
clutch OFF <
33° F, resets >
Freeze–up
37° F
Control
opens < 29.4
psi PCM input
opens > 431.0
psi PCM input
Description Notes
System forced BCM steps
into Recirc at HVAC into
high pressures recirc at 375
psi, steps out at
325 psi
Automatic ATC Programmable
type Communication
Interface (PCI)
Electric BCM controlled
actuator actuators use a
common ground
Electric
actuator
Electric
actuator
Controlled via a Uses pulse
linear blower width
controller modulation input
2 fans, low PCM controlled
speed and high fan module via
speed 2 relays
Relay PCM
2.2 amps @ 12
V ±0.5V
0.014 - 0.026
TPS, RPM, A/C
switch test
Mode doors,
clutch and fan
relays
Description Notes
LH - Intrepid, manual A/C
Concorde, control
300M, LHS
R134a
w/expansion
valve
Nippondenso ND-8 PAG oil
10PA17
2-wire BCM controlled,
evaporator clutch OFF <
temp sensor 33° F, resets >
37° F
LH