How to perform Cylinder Cutout Test using CAT Caterpillar ET Software?
The cylinder cutout test allows one cylinder or multiple cylinders to be cut out. The cylinder cutout test is useful when troubleshooting poor engine performance or a suspected injector failure.
The cylinder cutout test disables the injector by not providing the injector pulse to the solenoid. The cylinder cutout test can be performed on one injector or multiple injectors at once.
-Connect to CAT ET Software,
-Open Menu: Diagnostics – Diagnostic Tests – Cylinder Cutout Test
-Click Start, then Select Cylinder Cutout Test
for Example: choose 1-Cylinder Cutout Test
-Click Continue, then OK
-Wait until All Cycle Test (Cylinder 1-6) finished, and look at the Results on Fuel Position tab, the smallest value than the others, indicates that could be damaged on Injector (for Example: Cylinder 1).
1-Cylinder Cutout Test Conditions,
The following conditions must be met for the Automatic Cylinder Cutout Test
1) Engine Speed must be between 980 RPM and 1020 RPM (Engine Speed will automatically adjusted)
2) Engine Coolant Temperature must be 170 Deg F or higher
3) No Engine Performance related active diagnostic codes are allowed
4) No default Injector Serial Number (000000000000) allowed
5) Throttle position must not vary by +/- 5%
If at any time any of these conditions are not met, the test will automatically aborted.
-Ensure Transmission is in Neutral or Electrical Load is removed from Generator.
-Fan cycling, A/C compressor cycling, or changes in Engine Load will invalidate this test.
-If the fan is not controlled by the Engine ECM, please Enable the fan if possible.
-WARNING: If the ECM controls the fan, the fan will be turned ON automatically upon starting this test.
-WARNING: Please make sure the Compression Brake is in the OFF position. During the test, Compression Brake operation will cause the Engine to surge.
for Example: 1-Cylinder Cutout Test Aborted
Manual Cylinder Cutout Test
-Click on Change – Start – Stop tab, and look at Fuel Position value.