Grand Caravan L4-153 2.5L SOHC VIN K TBI (1988)
Main Relay (Computer/Fuel System): Description and Operation
Relay Locations--next To Battery
The Auto Shut Down (ASD) Relay controls power to the ignition coil, fuel injectors, and electric fuel pump. Controlled by the Engine Controller the
ASD supplies power to the ignition coil, fuel injectors, and electric fuel pump at all times when the ignition switch is in the START position. When the
ignition switch is in the RUN position and the engine control module is receiving reference signals from the distributor, power will also be supplied. If
there is no reference signal after two seconds the engine control module will de-energize the ASD and no power will be supplied to the ignition coil, fuel
injectors, or electric fuel pump.
