Lebaron Town & Country L4-135 2.2L SOHC VIN D TBI (1986)
Powertrain Control Module: Description and Operation
1986-87
The power module is mounted on the air cleaner along with the spark control computer and contains circuits necessary to energize the ignition coil,
fuel injectors and alternator field in order to minimize electrical noise in the passenger compartment. The module contains a power converter which
converts battery voltage into a regulated 8 volt output to energize the logic module and ignition pickup coil. The power module also houses and
energizes the Automatic Shut Down (ASD) relay which activates the fuel pump, ignition coil injector and portions of the power module.
The ASD relay is turned on and off by the logic module in response to distributor reference pulses. When distributor reference pulses are transmitted
to the logic module, the module activates the ASD relay. However, when no reference pulse is transmitted to the logic module the ASD relay is
deactivated and power is shut off to the fuel control system and ignition coil.
