SUPPORT ASSEM. 6P7146 - Caterpillar

OK - Repair: Repair the faulty connectors or the harness and/or replace the faulty connectors or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are correctly coupled.If a sensor must be replaced or the 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.Verify that the repair has eliminated the fault.STOPTest Step 2. Check for Active Diagnostic Codes and then Check for Recently Logged Diagnostic Codes
Turn the keyswitch to the OFF position.
Connect the electronic service tool to the diagnostic connector.
Turn the keyswitch to the ON position. If the engine will start, then run the engine.
Use the electronic service tool in order to monitor active diagnostic codes or recently logged diagnostic codes. Expected Result:One or more of the following diagnostic codes are active or recently logged:
190-8 Engine Speed signal abnormal
342-8 Secondary Engine Speed signal abnormalResults:
190-8 - Proceed to Test Step 4.
342-8 - Proceed to Test Step 3.
Not OK - No active diagnostic codes or recently logged diagnostic codes are displayed.STOPTest Step 3. Check the Harness Between the Secondary Speed/Timing Sensor and the ECM
Turn the keyswitch to the OFF position.
Disconnect the P2 connector. Disconnect the connector for the primary speed/timing sensor. Disconnect the connector for the secondary speed/timing sensor.
Check the resistance between P2:53 and terminal 2 on the secondary speed/timing sensor. The resistance should be less than 2.0 Ohms.
Check the resistance between P2:10 and terminal 1 on the secondary speed/timing sensor. The resistance should be less than 2.0 Ohms.Expected Result:The readings agree with the values that are listed above.Results:
OK - The harness is not OPEN circuit. Proceed to Test Step 5.
Not OK - The harness or the connector is an open circuit or high resistance.Repair: Repair the faulty connectors or the harness. Replace the faulty connectors or the 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 has eliminated the fault. STOPTest Step 4. Check the Harness Between the Primary Speed/Timing Sensor and the ECM.
Turn the keyswitch to the OFF position.
Disconnect the P2 connector. Disconnect the connector for the primary speed/timing sensor. Disconnect the connector for the secondary speed/timing sensor.
Check the resistance between P2:52 and terminal 2 on the secondary speed/timing sensor. The resistance should be less than 2.0 Ohms.
Check the resistance between P2:10 and terminal 1 on the secondary speed/timing sensor. The resistance should be less than 2.0 Ohms.Expected Result:The readings agree with the values that are listed above.Results:
OK - The harness is not OPEN circuit. Proceed to Test Step 6.
Not OK - The harness