GUARD ASSEM. 3P3388 - Caterpillar

coupled and/or inserted. The harness should be free of corrosion, abrasion, and pinch points.Results:
OK - Proceed to Test Step 3.
Not OK - Repair the connectors or the harness and/or replace the connectors or the harness. Ensure that all of the seals are correctly in place and ensure that the connectors are completely coupled. Clear all inactive diagnostic codes. Verify that the repair has eliminated the fault. Proceed to Test Step 3 if the fault has not been eliminated.Test Step 3. Verify That The Diagnostic Code Is Still Active
Turn the keyswitch to the ON position.Note: Wait at least 30 seconds in order to allow activation of the diagnostic codes.
Access the "Active Diagnostic Code" screen on the electronic service tool and check for active diagnostic codes.
Determine if the fault is related to an open circuit diagnostic code or a short circuit diagnostic code.Expected Result:A short circuit diagnostic code or an open circuit diagnostic code is active.Results:
OK - SHORT Circuit - A short circuit diagnostic code is active at this time. Proceed to Test Step 4.
OK - OPEN Circuit - An open circuit diagnostic code is active at this time. Proceed to Test Step 5.
Not OK - A short circuit diagnostic code is not active. An open circuit diagnostic code is not active. An intermittent fault may exist.Repair: Use the electronic service tool to perform a "Wiggle Test". If faults are indicated, then go to the appropriate procedure. STOPTest Step 4. Disconnect The Sensor In Order To Create An Open Circuit
Turn the keyswitch to the OFF position.
Disconnect the sensor connector for the sensor with the short circuit diagnostic code.
Turn the keyswitch to the ON position.Note: Wait at least 30 seconds in order to allow activation of the diagnostic codes.
Access the "Active Diagnostic Code" screen on the electronic service tool. Check for an active open circuit diagnostic code.Expected Result:An open circuit diagnostic code for the disconnected sensor is now active.Results:
OK - A short circuit diagnostic code was active before disconnecting the sensor. An open circuit diagnostic code became active after disconnecting the sensor.Repair: Perform the following procedure:
Refer to Troubleshooting, "Electrical Connectors - Inspect".
Inspect the seals of the connectors for damage.
Connect the sensor and verify that the fault returns. If the fault returns, the sensor is faulty. Replace the sensor.
Use the electronic service tool to remove all inactive diagnostic fault codes.STOP
Not OK - There is a short circuit between the sensor harness connector and the ECM. Leave the sensor disconnected. Proceed to Test Step 6.Test Step 5. Create A Short Circuit Between The Signal And The Common Terminals At The Sensor Harness Connector
Disconnect the suspect sensor connector P100 for the coolant temperature sensor or disconnect P103 for the inlet manifold temperature sensor.
Turn the keyswitch to the ON position.Note: Wait at least 30 seconds in order to allow the activation of any diagnostic fault codes.
Fabricate a jumper wire 150 mm (6 inch) long. Crimp a terminal to both ends of the wire.
Monitor the "Active Diagnostic Code" screen on the electronic service tool before installing