BRACKET GP-MOUNTING 4570514 - Caterpillar

the short circuit. Proceed to Test Step 5.Test Step 5. Check the ECM
Verify that the engine control is in the OFF/RESET mode and that the electrical power is removed from the engine.
Use a 151-6320 Wire Removal Tool to remove terminals P2-10 and P2-20.
Install a jumper wire into terminals P2-10 and P2-20. Pull on the jumper wire in order to verify proper installation.
Restore the electrical power to the engine. Set the engine control to the STOP mode.
Wait for 30 seconds and use the "Active Diagnostic" screen of Cat ET to look for an active "444-05 Start Relay open circuit" diagnostic code.Expected Result:There is no active "444-05 Start Relay open circuit" diagnostic code.Results:
OK - When the jumper wire was installed, there was no active "444-05 Start Relay open circuit" diagnostic code. The ECM detects the jumper wire at the P2 connector. However, the ECM did not detect the jumper wire at the relay's connector. There is a problem with the wiring. The problem could be between the P2 connector and the J8 connector. Alternatively, the problem could be in the P8 connector or the wiring that is connected to the P8 connector.Repair: Perform the following procedure:
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine.
Use a 151-6320 Wire Removal Tool to remove the jumper wire from the P2 connector.
Reinstall terminals P2-10 and P2-20. Pull on the wires in order to verify proper installation of the terminals.
Repair the harness, when possible. Replace parts, if necessary. Stop.
Not OK - When the jumper wire was installed, a "444-05 Start Relay open circuit" diagnostic code was activated. The ECM did not detect the jumper wire. There is a problem with the ECM.Repair: Perform the following procedure:
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine.
Remove the jumper wire from the P2 connector.
Reinstall terminals P2-10 and P2-20. Pull on the wires in order to verify proper installation of the terminals.It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the problem is not resolved, perform the following steps:Temporarily install a new ECM. Refer to Troubleshooting, "Replacing the ECM".If the problem is resolved with the new ECM, install the original ECM and verify that the problem returns. If the new ECM operates correctly and the original ECM does not operate correctly, replace the original ECM. Refer to Troubleshooting, "Replacing the ECM". Stop.Test Step 6. Create an Open Circuit in Order to Check for a Short Circuit
Set the engine control to the OFF/RESET mode. Remove the electrical power from the engine.
Use a 151-6320 Wire Removal Tool to remove terminals P2-10 and P2-20.
Restore the electrical power to the engine. Set the engine control to the STOP mode.
To prevent the engine from starting, shut OFF the main gas supply.
Set the engine control to the START mode for at least six seconds. Then set the engine control to the STOP mode.Expected Result:There is no audible click and/or vibration when the relay is disconnected