13-Step B, Injector Control Circuit

1. With air cleaner removed and diagnostic read-out tool connected to engine test connector, place ignition switch in the OFF position.
2. Disconnect white electrical connector from logic module.
3. Connect fuel injector electrical connector.
4. Place ignition switch in the RUN position, then depress diagnostic read-out tool ATM button.
5. If fuel is now being sprayed from the fuel injector, replace [1][2]power module.
6. If fuel is not being sprayed from fuel injector, replace logic module. Prior to replacing logic module, check for excessive fuel pressure.