FILTER-FUEL 3089679 - Caterpillar

Illustration 1 g00826129
(1) Shutoff solenoid (2) Rack position sensor (3) Engine Data Link connector (4) Rack solenoid (5) Engine speed sensor (6) Transducer module (7) ECM (8) Ground stud on the engine block (9) Coolant temperature sensor (10) Timing solenoid (11) Timing position sensor (12) Vehicle speed sensor (13) Vehicle speed buffer (14) Dash Data Link (15) Throttle position sensor (16) Negative ground through starter or main frame rail (17) Coolant level sensor (18) Diagnostic lamp (19) Warning lamp (20) Clutch switch (21) Brake switch (22) Parking brake switch (23) Cruise control ON/OFF switch (24) Cruise control SET/RESUME switch (25) Battery (26) OEM vehicle wiring harnessThe Programmable Electronic Engine Control (PEEC III) uses several electronic input components. These components require an operating voltage. Sometimes, the components require a reference voltage as well. Refer to Electrical Schematics, SENR5509 for the electrical schematics of the PEEC III system.Grounding Practices
Proper grounding for the vehicle and the engine electrical systems is necessary for proper vehicle performance and reliability. Improper grounding will result in uncontrolled electrical circuit paths and unreliable electrical circuit paths. Uncontrolled engine electrical circuit paths can result in damage to the following components:
main bearings
crankshaft bearing journal surfaces
aluminum componentsUncontrolled electrical circuit paths can cause electrical noise which may degrade the vehicle and the radio performance. To ensure the proper functioning of the vehicle and engine electrical systems, an engine-to-frame ground strap with a direct path to the battery must be used. The direct path to the battery can be accomplished by the following methods.
starter motor ground
frame to starter motor ground
direct frame to engine groundIn any case, an engine-to-frame ground strap must be run from the cylinder head grounding stud to the frame and the negative battery post.
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Cylinder head to battery ground (1) Cylinder head ground stud (2) Frame (3) Battery
Illustration 3 g00536186
Alternate cylinder head to battery ground (1) Cylinder head ground stud (2) Negative terminal on starter (3) Frame (4) BatteryThe cylinder head must have a wire that is grounded to the battery. Refer to the above illustrations. Ground wires or ground straps should be combined at ground studs that are dedicated for ground use only. The engine grounds should be inspected after every 20125 km (12500 miles) or every 250 hours. All grounds should be tight and free of corrosion. All ground paths must be capable of carrying any likely fault currents. An AWG # 0 or larger wire is recommended for the cylinder head grounding strap. The alternator should be battery ground with a wire size that is capable of managing the full charging current of the alternator.
When boost starting an engine, follow the instructions in the Operation and Maintenance Manual.
The engine has several input components which are electronic. These components require an operating voltage. Unlike many electronic systems of the past, this engine is tolerant to common external sources of electrical noise. Electro-mechanical buzzers can cause disruptions in the power supply. If electro-mechanical buzzers are used anywhere on the vehicle, the engine electronics should be powered directly from the