C4.4 and C6.6 Industrial Engines and Engines for Caterpillar Built Machines Caterpillar


CID 1779 FMI 05

Usage:

C4.4 444
Conditions Which Generate This Code:

This diagnostic code indicates that the Electronic Control Module (ECM) has detected an open circuit or low current condition in the solenoid for the fuel rail pump.

System Response:

If equipped, the warning light will come on and the ECM will log the diagnostic code.

An electrical fault may prevent the provision of pressure to the fuel rail. This may result in the loss of fuel injection. If the solenoid for the fuel rail pump fails, it is likely that fuel will not be pumped into the fuel rail. The engine will stop or the engine will not start.

Test Step 1. Perform the following diagnostic procedure: Fuel Rail Pump Solenoid - Test

Results:

  • OK - STOP

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