LINK AS.-TRACK 2428995 - Caterpillar

Perform a 45 N (10 lb) pull test on each of the wires in the circuit.
Check the allen head screw from each ECM connector for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the correct torque value.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All of the connectors, pins and sockets are completely coupled and/or inserted and the harness and wiring are free of corrosion, of abrasion and of pinch points.Results:
OK - The harness and connectors appear to be OK. Proceed to Test Step 2.
Not OK - The connectors and/or wiring are 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.STOPTest Step 2. Check for Diagnostic Codes
Connect the Cat ET to the service tool connector. Refer to Troubleshooting, "Electronic Service Tools".
Restore electrical power to the ECM.
Check for active diagnostic codes on Cat ET.Look for the following codes:
190-02
190-03
190-08
342-02
342-03
342-08Expected Result:None of the above diagnostic codes are active.Results:
OK - None of the above codes are active, but there is a problem that has been associated with the engine speed/timing sensors. Proceed to Test Step 3.
OK - None of the above codes are active.Repair: There may be an intermittent problem in the circuit. If an intermittent problem is suspected, refer to Troubleshooting, "Electrical Connectors - Inspect".STOP
Not OK - One or more of the above codes are active. Proceed to Test Step 3.Test Step 3. Inspect the Condition of the Engine Speed/Timing Sensors
Remove electrical power from the ECM.
Remove the suspect engine speed/timing sensor.
Inspect the sensor tip for damage.
Inspect the plastic slip head for damage.
Check the tension on the slip head by gently prying the slip head out of the sensor body. Extend the slip head 3 to 4 mm (0.12 to 0.16 inch). Push the slip head back into the sensor body from the extended position. Movement of the slip head will require a small amount of force. The amount of tension that is on the slip head must not allow movement of the slip head during engine operation.
Again, pull the slip head from the sensor body to the fully extended position.Expected Result:The sensor is not damaged. An adequate amount of tension is felt on the slip head and the movement is smooth.Results:
OK