Perkins 1104E Series Troubleshooting Manual page 160

160
Troubleshooting Section
C. Refer to Troubleshooting, "Electrical Connectors
- Inspect".
D. Perform a 45 N (10 lb) pull test on each of the
wires in the ECM connector and the sensor
connectors that are associated with the active
diagnostic code.
Refer to Illustration 73.
E. Check the ECM connector (Allen head screw) for
the proper torque of 6.0 N·m (55 lb in).
F. Check the harness and wiring for abrasions and
for pinch points from the sensors back to the ECM.
Expected Result:
All connectors, pins, and sockets should be
completely coupled and inserted. The harness and
wiring should be free of corrosion, abrasion, and
pinch points.
Results:
•
OK – Proceed to Test Step 4.
•
Not OK
Repair: Repair the connectors or wiring and/or
replace the connectors or wiring. Ensure that all of
the seals are properly in place and ensure that the
connectors are completely coupled.
Verify that the repair eliminates the problem.
Use the electronic service tool in order to clear all
logged diagnostic codes.
STOP.
Test Step 4. Verify that the Diagnostic
Code is Still Active.
A. Turn the keyswitch to the ON position. Wait at
least 15 seconds for activation of the diagnostic
codes.
B. Use the electronic service tool to check for active
diagnostic codes. Record all active diagnostic
codes.
C. Determine if the problem is related to an open
circuit diagnostic code or a short circuit diagnostic
code.
Expected Result:
Either a short circuit diagnostic code is active or an
open circuit diagnostic code is active.
Results:
•
SHORT Circuit – A short circuit diagnostic code is
active at this time. Proceed to Test Step 5.
•
OPEN Circuit – An open circuit diagnostic code is
active at this time. Proceed to Test Step 6.
Test Step 5. Disconnect The Sensor In
Order To Create An Open Circuit.
A. Turn the keyswitch to the OFF position.
B. Disconnect the sensor connector of the sensor
with the short circuit diagnostic code.
C. Turn the keyswitch to the ON position. Wait at
least 15 seconds for activation of the diagnostic
codes.
D. Use the electronic service tool to check the "Active
Diagnostic Code" screen. Check for an open
circuit diagnostic code.
Expected Result:
An open circuit diagnostic code for the disconnected
sensor is now active.
Results:
•
OK – A short circuit diagnostic code was active
before disconnecting the sensor. An open circuit
diagnostic code became active after disconnecting
the sensor. Proceed to Test Step 7.
•
Not OK – There is a short circuit between the
sensor harness connector and the ECM. Leave the
sensor disconnected. Proceed to Test Step 9.
RENR2696-01