ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
CORRECTIVE ACTION - Continued
Monitor the logged diagnostic code screen on the Cat ET. Look for an 11 code
that is related to one of the unit injectors.
Use the Injector Solenoid Test to test the injector solenoids.
a. Ensure that the engine has warmed to the normal operating temperature of
b. Stop the engine as follows: On EMCP set ENGINE CONTROL switch to
COOL DOWN/STOP. Leave Battery Disconnect Switch to ON. Leave
DEAD CRANK SWITCH to NORMAL. DO NOT START THE ENGINE.
Access the Injector Solenoid Test on the Cat ET.
d. Activate the test.
Do not confuse the Injector Solenoid Test with the Cylinder Cutout Test. The Cylinder Cutout Test
is used while the engine is running. The Injector Solenoid Test is used in order to actuate the
injector solenoids while the engine is stopped.
e. As each solenoid is energized by the ECM an audible click can be heard at
the valve cover. Listen for a click at each valve cover. A black square will
appear over the cylinder number on the Cat ET as each cylinder is being
Perform the Injector Solenoid Test at least two times.
g. In the previous test step, if the Cylinder Cutout Test indicated a problem with
one of cylinders, there may be a problem with the injector for the cylinder or
there may be a mechanical problem with the cylinder. If a problem with an
injector is suspected, replace the suspect injector with another injector on the
engine in order to confirm the problem. Perform the Cylinder Cutout Test
again. If the problem moves to the other cylinder with the suspect injector,
replace the injector (WP 0114). If the problem remains in the original
cylinder, there is a mechanical problem with the cylinder.
A strong electrical shock hazard is present if the electrical power is not removed from the ECM.
The electronic unit injector system uses 90-120 volts. Failure to comply can cause injury or death