Service Manual

Engine Testing (In Chassis) ISB, ISBe and QSB (Common Rail [...]
Page 14-26 Section 14 - Engine Testing - Group 14
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Refer to the INSITE™ service tool user's manual for
detailed automated cylinder performance test instructions.
After Running the Automated Cylinder Performance
Test
It is normal for the engine rpm to vary during the test, but
if the engine rpm goes to high idle for more than 5
seconds at a time, shut off the engine.
Once the test is complete, make sure to:
1 Shut off engine.
2 Return the fan to normal operation, if necessary.
3 Perform the suggested repairs that resulted from the
test.
4 Return any disengaged devices to their normal mode
of operation.
Cylinder Cutout Test
Use the single-cylinder cutout test to remove individual
cylinders from the engine firing cycle and to monitor a
running engine while the selected cylinder is disabled.
The system displays the percent load and rpm values
while the cylinder is disabled.
The service tool must be attached to a running engine in
a nonmoving vehicle to perform this test.
Cylinder to Be Cut Out
None: Select this option to run all cylinders.
1 to 6: Select one of these options to shut off cylinder
number 1 through number 6, respectively. Only one
cylinder can be shut off at a time.
Monitor
Percent Load: Is the percent of load that the engine is
carrying.
rpm: Is the engine's revolutions per minute.
Refer to the INSITE™ service tool user's manual for
detailed cylinder cutout test instructions.