Circuit Description
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Control Module (PCM) has 4 injector driver circuits, one for each injector. PCM monitors current in each driver circuit by measuring a voltage drop through a fixed resistor and is able to control driver circuit. Current through each driver is allowed to rise to a peak of 4-amps to quickly open injectors. Current is then reduced to .5 amp to keep injector open. If current cannot reach 4-amps or injector driver is shorted to voltage, DTC P0200 will set.
Conditions for setting this DTC are:
- Injector current is less than 4 amps.
- Battery voltage is greater than 9 volts.
- Conditions met for 7 seconds.