Stratus Sedan V6-2.7L (2001)
Mode Switch, Fresh-air Door Position Change Request
Provided that the Blower Switch is in any of the four ON positions, rotating the Mode Switch to the Recirc position will result in the A/C - Heater
Control sending a signal to the BCM to signal the actuator to close the fresh-air door. While rotating the mode Switch to any other position results
in the A/C - Heater Control sending a signal to the BCM to signal the actuator to open the fresh-air door. When the Blower Switch is OFF, the
fresh-air door closes to prevent outside air from entering the passenger compartment.
Blend Switch
The rotary Blend Switch has multiple detents to control the full range of temperature that the system can produce in any mode. Provided that the
Blower Switch is an any of the four ON positions, rotating the Blend Switch will result in the A/C - Heater Control sending a signal to the BCM to
signal the actuator to move the blend door. A potentiometer, inside the Blend Door Actuator, and feedback circuits provide the BCM with door
position information.
Rear Window Defogger Switch
The Rear Window Defogger Switch is a momentary contact switch. Toggling the switch results in the A/C - Heater Control sending a signal to the
BCM to provide rear window defogger activation or deactivation respectively. The switch LED illuminates when the switch is ON.
Diagnostic Trouble Codes
All HVAC Diagnostic Trouble Codes are stored in the Body Control Module. Stored DTCs indicate that a problem has occurred in the HVAC
system, and may still be present. To verify a problem is still present in the HVAC system, use the DRB III to erase all stored BCM DTCs. After
erasing the DTC(s), use the DRB III to see if the DTC(s) reappear. If necessary, actuate the A/C - Heater Control switches with the ignition ON
and with the engine running while monitoring the DRB III to see if the DTC(s) reappear.
INTERIOR LIGHTING
Courtesy Lamp Control
The body controller has direct control over the majority of the vehicle's courtesy lamps. The body computer will illuminate the courtesy lamps
under any of the following conditions:
1. Any door is ajar.
2. The courtesy lamp switch ON the instrument panel is closed.
3. A Remote Keyless entry unlock message is received. If the interior lamps are left ON after the ignition is turned OFF, the BCM will turn them
OFF after 15 minutes or until either the dome lamp switch or door ajar switch changes state.
Illuminated Entry
Illuminated entry will be initiated when the customer enters the vehicle by unlocking the doors with the key fob, or with the key if the vehicle is
equipped with vehicle theft alarm. Upon exiting the vehicle, if the lock button is pressed with a door open, illuminated entry will cancel when the
door closes. If the doors are closed and the ignition switch is turned ON, the illuminated entry also cancels.
MECHANICAL INSTRUMENT CLUSTER
The Mechanical Instrument Cluster (MIC) is divided into 4 sections. Primary gauges (Speedometer and Tachometer), secondary gauges (Fuel
Level, Engine Coolant Temperature), PCI bus enabled indicator lamps and hardwired enabled indicator lamps.
The gauge mechanisms function in the same way. The main differences are in the face and size of the gauge.
The Oil Pressure, Brake Warning, Turn Signal and Fog Lamp indicators are directly wired to the circuits that they are indicators for. These
indicators are located in, but not controlled by, the MIC and are not part of any MIC self test or diagnostic. All indicators are replaceable bulbs or
LEDs.
The PCM sends a gauge position message to the BCM through the PCI bus. The MIC receives this message from the BCM, translates it, and
positions the gauges. The BCM also sends messages to the MIC to actuate all PCI controlled indicators. These messages are received when the
Ignition Switch is in the RUN or START position.
When the ignition Switch is turned to the RUN position, a bulb-check is performed. This consists of activating the PCI bus controlled indicators
for approximately 2 to 4 seconds. By holding the TRIP/RESET button in while turning the Ignition Switch to the RUN position, you can activate
the MIC Self Test.
The Following indicators are controlled by PCI bus messages:
-
Malfunction Indicator Lamp
-
Charging System Warning Indicator
-
Engine Coolant Temperature Indicator
-
Cruise Engaged Indicator
-
Airbag Warning Indicator
-
Low Fuel Indicator
-
ABS Warning Indicator
-
High Beam Indicator
