C175–16 Locomotive Engine Caterpillar


Aftertreatment SCR System Verification - Test

Usage:

C175-16 3B9
Access the test by following these Cat ET menus:

  • Diagnostics

  • Diagnostic Tests

This test is an aid for the troubleshooting of the dosing control system. Use the test to verify proper operation of the system.

The test consists of the following two parts:

  • Pre-priming

  • Pump on dosing check

Pre-Priming

The first part of the test simulates what the system normally checks prior to normal dosing operation, but does not require the engine to be running.

This part of the test can also be ran with the engine running.

Successful completion is required to advance to the next part of the test.

Refer to System Operation, "Dosing Control System Operation" for further information.

Pump on Dosing Check

After successfully completing, the pre-priming part of the test the user has the option of running the pump on dosing check.

If the user elects to proceed, the test will automatically start when the predetermined conditions for the following are met:

  • Engine speed

  • Exhaust temperature

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