Perkins 1104E Series Troubleshooting Manual page 143

RENR2696-01
Repair: Tighten the Allen head screw to the proper
torque.
Verify that the fault has been eliminated.
If the fault has not been eliminated proceed to test
step 3.
Test Step 3. Perform a Pull Test on each
Wire Terminal Connection.
A. Each terminal and each connector should
withstand a 45 N (10 lb) pull test. Each wire should
remain in the connector body. This test checks
whether the wire was properly crimped in the
terminal and whether the terminal was properly
inserted into the connector.
B. The DT connectors use an orange wedge to lock
the terminals in place.
C. Check in order to ensure that the orange wedge is
not missing and that the orange wedge is installed
properly on the DT connectors.
Note: Terminals should always be crimped onto
the wires by use of a crimp tool. Do not solder the
terminals.
Expected Result:
Check that each terminal and each connector
withstands 45 N (10 lb) of pull. Each wire remains in
the connector body.
Results:
•
OK – Proceed to Test Step 4.
•
Not OK – Repair the wiring or replace the
connector or the terminal.
Repair: Verify that the repair has eliminated the
fault.
If the fault has not been eliminated proceed to test
step 4.
Test Step 4. Monitor the Electronic
Service Tool while the Wiring and the
Connectors are being pulled.
A. Turn the keyswitch to the ON position.
B. If there is an inactive diagnostic code that pertains
to the circuit, perform the following test:
Monitor the "Inactive Diagnostic Code" screen of
the electronic service tool while the diagnostic
code remains active. Pull each of the harnesses
and the connectors that connect to the
component. If the harness is being pulled and
the inactive diagnostic code disappears refer
to Troubleshooting, "Troubleshooting with a
Diagnostic Code" for the correct procedure.
C. If there is an active diagnostic code on the circuit
for a particular component, perform the following
test:
Monitor the "Active Diagnostic Code" screen of the
electronic service tool for the component while the
harnesses are being pulled. Verify that the code
has been eliminated. If the code remains active
there is a problem in the wiring or the connector.
D. If there are no active diagnostic codes or inactive
diagnostic codes, perform the following test:
Monitor the "Status Display" screen on the
electronic service tool for a particular parameter
while the wiring harness is being pulled.
If the harness is being pulled and the reading
changes erratically, there is a problem in the
cables or the connector.
Expected Result:
If the problem appears to be external to the
harnesses and connectors, then pulling on the
harness and the connectors will have no effect on
either the component status of the active diagnostic
code or on the engine performance.
Results:
•
OK – Proceed to Test Step 5.
•
Not OK – Repair the harness and/or the
connectors or replace the harness and/or
connectors that are causing the problem. If the fault
has not been eliminated proceed to test step 5.
Test Step 5. Check Wires for Nicks and/or
Abrasions in the Insulation.
A. Carefully inspect each wire for signs of abrasion,
nicks, or cuts.
The following areas are locations that should be
checked:
•
Exposed insulation
•
Points of rubbing wire against the engine
•
Points of rubbing wire against a sharp point
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Troubleshooting Section