Perkins 1106D Troubleshooting Manual page 162

162
Troubleshooting Section
B. Disconnect the connectors from the valve cover
base.
C. Turn the keyswitch to the ON position.
D. Perform the "Injector Solenoid Test" at least two
times.
Expected Result:
All cylinders indicate "Open".
Results:
•
OK – All cylinders indicate "Open". Proceed to
Test Step 10.
•
Not OK – One or more cylinders indicate "Short".
Note the cylinders that indicate "Short". Proceed
to Test Step 9.
Test Step 9. Check the ECM for a Short
Circuit
Electrical shock hazard. The electronic unit injec-
tor system uses 67-73 volts.
A. Turn the keyswitch to the OFF position. A strong
electrical shock hazard is present if the keyswitch
is not turned OFF.
B. Disconnect connector P2 from the ECM and check
for evidence of moisture entry.
C. Turn the keyswitch to the ON position.
D. Perform the "Injector Solenoid Test" at least two
times.
Expected Result:
All cylinders indicate "Open" when connector P2 is
disconnected from the ECM.
Note: When the engine harness is disconnected,
all of the diagnostic codes for supply voltage to the
sensors will be active. This is normal. Clear all of
these diagnostic codes after completing this test step.
Results:
• OK – The short circuit is in the engine harness.
Repair: The fault is most likely in one of the wires
to the injector. Inspect the connectors for moisture
and for corrosion. Also, check the wire insulation
for damage and for strands that are exposed.
This document is printed from SPI². Not for RESALE
Repair the engine harness or replace the engine
harness, as required. Clear all diagnostic codes
after completing this test step.
Verify that the repair eliminates the fault.
STOP.
•
Not OK – There may be a fault with the ECM.
Repair: Perform the following procedure:
1. Make sure that the latest flash file for the
application is installed in the ECM. Refer to
Troubleshooting, "Flash Programming".
2. Contact Perkins Global Technical Support.
Note: This consultation can greatly reduce the repair
time.
3. If Perkins Global Technical Support
recommends the use of a test ECM, install a
test ECM. Refer to Troubleshooting, "Replacing
the ECM".
4. Perform the "Injector Solenoid Test".
5. If the fault is resolved with the test ECM,
reconnect the suspect ECM.
6. If the fault returns with the suspect ECM,
replace the ECM.
7. Use the electronic service tool in order to clear
all logged diagnostic codes and then verify that
the repair eliminates the fault.
STOP.
Test Step 10. Check the Engine Harness
Under the Valve Cover for a Short Circuit
Electrical shock hazard. The electronic unit injec-
tor system uses 67-73 volts.
A. Turn the keyswitch to the OFF position. A strong
electrical shock hazard is present if the keyswitch
is not turned OFF.
B. Remove the valve cover.
C. Disconnect each of the injectors that indicate a
"Short" from the wiring harness. Ensure that each
of the connectors from the disconnected injector
harness does not touch any other components.
D. Turn the keyswitch to the ON position.
KENR6201-01