Perkins 1106D Troubleshooting Manual page 157

SENR9982
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK – There is no short circuit. Proceed to Test
Step 7.
•
Not OK – The harness has a short circuit.
Repair: Repair the faulty connectors or replace
the faulty connectors. Repair the faulty harness or
replace the faulty harness. Reconnect all sensor
and ECM connectors. Ensure that all of the seals
are correctly in place. Ensure that all connectors
are correctly coupled.
Verify that the repair eliminates the fault.
STOP.
Test Step 6. Check that the Connections
and the Wiring to the Primary
Speed/Timing Sensor and the ECM
are Isolated from the Other Power
Sources
A. Turn the keyswitch to the OFF position.
B. Disconnect the P2 connector. Disconnect the
connector for the primary speed/timing sensor.
Disconnect the connector for the secondary
speed/timing sensor.
C. Check the resistance between P2:52 to each
of the other pins on P2. Check the resistance
between P2:52 to the ground and battery+
terminals. The resistance should be more than
20,000 Ohms.
D. Check the resistance between P2:10 to each
of the other pins on P2. Check the resistance
between P2:10 to the ground and battery+
terminals. The resistance should be more than
20,000 Ohms.
Expected Result:
The readings agree with the values that are listed
above.
Results:
•
OK – The wires are not a short circuit. Proceed
to Test Step 7.
•
Not OK – The sensor wiring has a short circuit.
Repair: Repair the faulty connectors or replace
the faulty connectors. Repair the faulty harness or
replace the faulty harness. Reconnect all sensor
and ECM connectors. Ensure that all of the seals
are correctly in place. Ensure that all connectors
are correctly coupled.
Verify that the repair eliminates the fault.
STOP.
Test Step 7. Check if a Replacement
Sensor Eliminates the Fault
A. Turn the keyswitch to the OFF position.
B. Disconnect the suspect sensor and remove the
suspect sensor from the engine.
C. If a sensor must be replaced or a sensor must be
reinstalled, complete all of the following tasks:
•
Lubricate the O ring with clean engine
lubricating oil.
•
Ensure that the plug for the sensor has a seal
inside the connector body. If a seal is damaged
or missing, replace the seal.
•
Ensure that the sensor is fully seated into the
engine before tightening the bracket bolt.
•
Ensure that the connector is latched.
• Ensure that the harness is correctly secured,
and ensure that the harness is attached to the
harness clip.
D. Turn the keyswitch to the ON position.
E. Start the engine.
F. Use the Perkins EST in order to monitor the
diagnostic codes.
G. Verify that the replacement sensor has eliminated
the fault.
Expected Result:
The fault has been rectified.
Results:
•
OK – If the fault is eliminated with the test sensor,
reconnect the suspect sensor. If the fault returns
with the suspect sensor, replace the suspect
sensor.
Repair: Verify that the repair eliminates the fault.
STOP.
157
Troubleshooting Section