Seville V8-300 4.9L (1991)
Driver Door Ajar Circuit
TEST CONDITION:
1.
Vehicle is a 2 door (BCM checks EEPROM).
2.
PCM/ECM Universal Asynchronous Receiver Transmitter (UART) datalink is functioning properly (no code B334 set).
FAILURE CONDITION:
1.
Engine is running.
2.
Transmission in Park or Neutral.
3.
Passenger door ajar.
4.
"Passenger Door Ajar" failure already present.
5.
Passenger door still ajar.
ACTION TAKEN:
Display the "Passenger Door Ajar" message on the CCDIC.
The BCM provides system voltage to the passenger door ajar circuit, and the passenger door ajar switch provides the single path to ground. The BCM
supplies and internally monitors the voltage level of circuit at pin 3C14. When the passenger door ajar circuit is open the BCM will detect system
voltage, but if the passenger door ajar switch provides a path to ground (passenger door open), the BCM will detect that the circuit has been grounded.
Once the BCM has determined that all of the failure conditions have been met, it will send the "Passenger Door Ajar" message to the CCDIC.
The failure conditions are divided up into two sets. The first set of conditions is used if the BCM has not detected the door ajar yet. If the BCM has
already detected the door ajar, it will use the second set of conditions. This is done so that once the message has appeared, it will remain until the door
has been closed property.
Rear Door Ajar
