Perkins 1106D Troubleshooting Manual page 161

KENR6201-01
Results:
•
OK – There is a fault with the injector harness
under the valve cover.
Repair: Repair the injector harness or replace the
injector harness under the valve cover.
Verify that the repair eliminates the fault.
STOP.
•
Not OK – The injector may be faulty.
Repair: Replace the faulty injector.
Restore the wiring to the correct injectors.
Perform the "Injector Solenoid Test".
Verify that the repair eliminates the fault.
STOP.
Test Step 7. Check the ECM for an Open
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.
C. Remove the supply wire and the return wire for
the suspect injector from connector P2. Install a
jumper wire into connector P2 in order to provide
a short between the supply and the return of the
suspect injector.
D. Reinstall connector P2 to the ECM.
E. Turn the keyswitch to the ON position.
F. Perform the "Injector Solenoid Test" at least two
times.
Expected Result:
The electronic service tool displays "Short" for the
cylinder with the jumper wire.
Note: Shorting a shared supply will affect the status
of three injectors. Ignore the status of the other
injectors that are on the shared shared supply.
This document is printed from SPI². Not for RESALE
Results:
•
OK – The ECM is OK.
Repair: If three injectors that share a supply
indicate "Open", the open circuit is probably caused
by a faulty ECM.
Repair the engine harness or replace the engine
harness, as required.
Verify that the repair eliminates the fault.
STOP.
•
Not OK – There may be a fault with the ECM.
Repair: Perform the following procedure:
1. Remove the jumper wire from connector P2 and
reinstall the injector wires.
2. Make sure that the latest flash file for the
application is installed in the ECM. Refer to
Troubleshooting, "Flash Programming".
3. Contact Perkins Global Technical Support.
Note: This consultation can greatly reduce the repair
time.
4. If Perkins Global Technical Support
recommends the use of a test ECM, install a
test ECM. Refer to Troubleshooting, "Replacing
the ECM".
5. Perform the "Injector Solenoid Test".
6. If the fault is resolved with the test ECM,
reconnect the suspect ECM.
7. If the fault returns with the suspect ECM,
replace the ECM.
8. 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 8. Check the Harness between
the ECM and the Valve Cover Base 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.
161
Troubleshooting Section