
KENR6933
173
Troubleshooting Section
Repair:
Perform the following repair:
Repair the connectors or the harness and/or
replace the connectors or the harness. Ensure that
all of the seals are correctly in place and ensure
that the connectors are completely coupled.
Verify that the repair eliminates the fault.
STOP.
Test Step 2. Check for Active Diagnostic
Codes
A.
Connect Perkins EST to the data link connector.
B.
Turn the keyswitch to the ON position.
C.
Monitor the active diagnostic code screen on
Perkins EST. Check and record active diagnostic
codes.
Expected Result:
Result 1
Diagnostic code 91-08 is active.
Result 2
There are no active diagnostic codes that
are associated with the speed demand circuit at this
time. However, a fault is suspected.
Results:
•
Result 1
–
Proceed to Test Step 3.
•
Result 2 – There may be an intermittent connection
in the wiring. Proceed to Test Step 3.
Test Step 3. Check the Control Signal.
A.
Refer to the OEM supplied manual for the control
system.
B.
Check that the output signal from the control
system is correct.
Expected Result:
The output signal from the control system should be
within the speci
fi
cation in the OEM supplied manual.
Results:
•
OK
–
The output signal from the control system is
correct. Proceed to Test Step 4.
•
Not OK – The output signal from the control
system is not correct or the control system is
incorrectly con
fi
gured.
Repair:
Repair the control system or con
fi
gure the
control system. Refer to the OEM supplied manual.
Verify that the repair eliminates the fault.
STOP.
Test Step 4. Check the Signal at the ECM.
A.
Turn the keyswitch to the OFF position.
B.
Remove the P1 OEM connector.
C.
Temporarily remove the pin from P1:53.
D.
Reconnect P1 OEM connector.
E.
Connect the red probe of a multimeter to the
removed pin and the black probe of a multimeter
to P1:33.
F.
Turn the keyswitch to the ON position.
G.
Check that the signal at the ECM is the same
value as the output signal from the control system.
H.
Turn the keyswitch to the OFF position.
I.
Remove P1 OEM connector and reinstall P1:53 to
the P1 OEM connector.
J.
Reconnect P1 OEM connector.
Expected Result:
The signal at the ECM is the same value as the
output signal from the control system.
Results:
•
OK – The terminals on the ECM have the correct
voltage for the control system.
Repair:
The ECM is suspect.
1.
Temporarily connect a test ECM.
Note:
The test ECM should be programmed with the
correct software. All parameters should be set to the
same value as the suspected ECM.
2.
If the fault is eliminated with the test ECM,
install the suspect ECM and verify that the fault
returns.
3.
If the fault returns replace the ECM.
STOP.
•
Not OK – There is a fault in the harness or the
connectors between the sensor and the ECM.
Check all of the connections between the ECM and
the control system. Repair the damaged cables
or replace the damaged cables. Check that the
repairs have eliminated the fault. STOP.
Summary of Contents for 1106C Genset
Page 1: ...May 2007 Troubleshooting 1106C Genset PK Engine KENR6933 00 ...
Page 19: ...KENR6933 19 Troubleshooting Section g01178875 Illustration 6 ...
Page 186: ...186 KENR6933 Index Section ...
Page 187: ...KENR6933 187 Index Section ...
Page 188: ...Copyright 2007 Perkins Engines Company Limited All Rights Reserved Printed in U K ...