Caterpillar 3116/3126 ECM Wire Diagram


Factory Cat 3116 (electronically controlled engine) ECM Wire Diagram for engine serial numbers 8WL, 1WM, 4ES, 2CW.

This factory printed Caterpillar 3116/3126 ECM wire diagram is printed by the Caterpillar print shop so you can be sure the information is correct.

If you are performing any repair or overhaul on this Cat engine, you need the proper information in order to ensure you can perform the job correctly.

Doing an overhaul on this engine? Check out our complete engine overhaul set

Factory Cat 3116/3126 (electronically controlled engine) ECM Wire Diagram for engine serial numbers 8WL, 1WM, 4ES, 2CW.

Caterpillar 3116/3126 ECM Wire Diagram
Engine S/N Prefixes: WL, 1WM, 4ES, 2CW

Coverage includes:
  • Wiring from ECM to injectors, sensors, etc.
  • Diagnostic tips
  • Fault codes
  • Sensor testing has been working with the Caterpillar print facility since 1999, ensuring the correct factory service information is available to fleets, municipalities, water districts, independent service facilities & more.  We at have always felt strongly that it is critical that the industry mechanics be supplied with the correct torque specifications, dimensions & procedures, electronic diagnostic information be made available.  The changes in the trucking industry over the decades have made it critical to “do the job once, do the job right”.

Procedures that may have been acceptable years ago would now likely cause rapid failures in a truck engine if they were used on present day engines & drivetrains.

The customer has two great advantages when dealing with

  1. Factory printed manuals
  2. 97% of all orders are shipped within 24 hours

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Diesel Diagnostic Equipment

Weight 1 oz


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