(Table 212, contd)
Troubleshooting Test Steps
Values Results
5. Create a Short at the Sensor Connector
A. Use a jumper wire to create a short between the signal terminal
and the ground terminal at the sensor connector.
B. Turn the keyswitch to the ON position.
C. Monitor the diagnostic codes on the electronic service tool. Check
for an active -4 diagnostic code for the suspect sensor.
D. Turn the keyswitch to the OFF position.
Short created Result: A -4 diagnostic code became active after creat-
ing the short at the sensor connector.
The wiring is OK. Replace the sensor.
Verify that the problem is resolved.
Result: A -4 diagnostic code does not become active
for the suspect sensor.
Proceed to Test Step 7.
6. Create an Open at the Suspect Sensor Connector
A. Turn the keyswitch to the OFF position.
B. Disconnect the sensor connector of the suspect sensor with the
active -4 diagnostic code.
C. Turn the keyswitch to the ON position.
D. Monitor the diagnostic codes on the electronic service tool. Check
for an active -3 diagnostic code for the suspect sensor.
E. Turn the keyswitch to the OFF position.
Create an
Open
Result: A -3 diagnostic code became active after dis-
connecting the sensor.
The wiring is OK. Replace the sensor.
Verify that the problem is resolved.
Result: A -3 diagnostic code did not become active
after disconnecting the sensor.
Proceed to Test Step 7.
7. Perform the Wiggle Test
Carefully following this procedure is the best way to identify the root
cause of an intermittent problem.
A. Turn the keyswitch to the ON position.
B. Use the electronic service tool to run the “Wiggle Test” .
C. Slowly wiggle the wiring and the connectors between the P2 con-
nector and the sensor. Pay particular attention to the wiring near each
connector. Be sure to wiggle all the wiring.
As you wiggle the wiring look for these problems.
1. Loose connectors or damaged connectors
2. Moisture on the connectors or the wiring
3. Damaged that is caused by excessive heat
4. Damage that is caused by chafing
5. Improper routing of wiring
6. Damaged insulation
Test passed Result: The wiring failed the Wiggle Test.
There is a problem with the wiring. Repair the wiring or
replace the wiring.
Verify that the problem is resolved.
STOP
Result: The wiring passed the Wiggle Test.
The problem may be intermittent. Inspect the wiring.
Refer to Troubleshooting, “Electrical Connectors -
Inspect”.
If the wiring looks OK, perform the following procedure.
1. Turn the keyswitch to the OFF position.
2. Disconnect the connectors. Carefully inspect the ter-
minals for proper installation. Make sure that each ter-
minal is clean and dry.
3. Insert a pin into each socket. Verify that each socket
grips the pin firmly. Repair any problems.
4. Connect all connectors.
5. Verify that the problem is resolved.
6. Return the unit to service.
STOP
UENR4469-36 389
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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