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Dodge Intrepid User Manual

Dodge Intrepid
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DIAGNOSIS AND TESTING - ERRATIC
OPERATION OF HVAC SYSTEM
Erratic operation of the A/C and heater systems
including:
• Lack of cold air
• Lack of hot air
• Unrequested mode change (ATC only)
• No control of mode or temperature control or
tapping blend door noise
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
IIIt. 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 Notes
Vehicle LH - Intrepid,
Concorde,
300M, LHS
Automatic
Temperature
Control (ATC)
System R134a
w/expansion
valve
Compressor Nippondenso
10PA17
ND-8 PAG oil
Freeze-up
Control
2-wire
evaporator temp
sensor
BCM controlled,
clutch OFF <
33° F, resets >
37° F
Low psi Control A/C pressure
transducer, line
mounted
opens < 29.4 psi
PCM input
High psi Control opens > 431.0
psi PCM input
Forced Recirc
Mode
System forced
into Recirc at
high pressures
BCM steps
HVAC into recirc
at 375 psi, steps
out at 325 psi
Control head Automatic ATC
type
Programmable
Communication
Interface (PCI)
Mode Door Electric actuator BCM controlled
actuators use a
common ground
Blend Door Electric actuator
Recirculation
Door
Electric actuator
Blower Motor Controlled via a
linear blower
controller
Uses pulse
width modulation
input
Cooling Fans 2 fans, low
speed and high
speed
PCM controlled
fan module via 2
relays
Clutch
Control Relay PCM
Draw 2.2 amps @ 12
V ±0.5V
Gap 0.0149 - 0.0269
DRB IIIT
Reads TPS, RPM, A/C
switch test
Actuators Mode doors,
clutch and fan
relays
24 - 6 HEATING & AIR CONDITIONING LH
HEATING & AIR CONDITIONING (Continued)

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Dodge Intrepid Specifications

General IconGeneral
BrandDodge
ModelIntrepid
CategoryAutomobile
LanguageEnglish

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