HOSE AS 3038453 - Caterpillar

Illustration 7 g00664397
Terminals for the pressure sensor connector
Turn the keyswitch to the ON position.
Fabricate a jumper wire 150 mm (6 inch) long. Crimp a Deutsch terminal to both ends of the wire.
Monitor the "Active Diagnostic Code" screen before installing the jumper wire and after installing the jumper wire.
Install the jumper on the engine harness connector. Install one end of the jumper at the sensor signal (terminal "C"). Install the other end of the jumper at the common connection for the pressure sensor (terminal "B"). Wait at least 15 seconds for activation of the short circuit diagnostic code.Refer to Illustration 7.Expected Result:A short circuit diagnostic code is active when the jumper is installed. An open circuit diagnostic code is active when the jumper is removed.Results:
OK - The engine harness and the ECM are OK.Repair: Perform the following repair:
Temporarily connect the suspect sensor.
If the diagnostic code remains active, replace the sensor.
Ensure that the diagnostic code is no longer active.
Verify that the repair eliminates the problem.STOP
Not OK - The open circuit diagnostic code remains active when the jumper is installed. The most probable location for the open is in the sensor common or the sensor signal wire in the engine harness between the ECM and the sensor. Remove the jumper. Proceed to test step 9.Test Step 9. Check The Operation Of The ECM By Creating Open And Short Circuits At The ECM Connector.
Illustration 8 g00728298
Terminal locations for pressure sensors
Turn the keyswitch to the OFF position.
Disconnect ECM engine harness connector J2/P2 and machine harness connector J1/P1. Thoroughly inspect both halves of the connectors for signs of corrosion or moisture.
Reconnect J1/P1.
Turn the keyswitch to the ON position. Monitor the "Active Diagnostic Code" screen. Wait at least 15 seconds for activation of the code.An open circuit diagnostic code should be active for the suspect sensor.Note: When the engine harness is disconnected, all of the open circuit diagnostic codes for the pressure sensors will be active. This is normal. Disregard the diagnostic codes for the other pressure sensors. Direct your attention to the diagnostic codes for the suspect sensor only.
Turn the keyswitch to the OFF position.
Fabricate a jumper wire 150 mm (6 inch) long. Crimp a Deutsch socket to both ends of the wire.
Install the jumper wire on the ECM connector J1 or J2. Insert the jumper wire between the terminal for the suspect sensor signal and the common connection for the engine's pressure sensor (terminal 3).A short circuit diagnostic code should be active when the jumper wire is installed.Refer to Illustration 8 for the ECM connectors.Expected Result:Open circuit diagnostic codes and short circuit diagnostic codes were active.Results:
OK - The ECM is operating properly. Proceed to Test Step 10.
Not OK - One of the following conditions exists: The open circuit diagnostic code is not active when the harness is disconnected. The short circuit diagnostic code is not active when the jumper wire is installed.Repair: Perform the following repair:
Temporarily connect a test ECM.
Remove all jumpers and replace all connectors.
Recheck the system for active diagnostic codes.
Repeat the test step.
If