MUFFLER GP 2W1111 - Caterpillar

Install a jumper wire (2) into the two terminals of the relay's connector (1) on the engine harness.
Switch the 35 amp circuit breaker ON. Set the engine control to the STOP mode. Note: The 17-5 diagnostic code can only be detected when the output for the fuel control relay is OFF. The output is OFF when the engine control is in the STOP mode and the engine is not running.
Wait for 30 seconds and use the "Active Diagnostic" screen of Cat ET to look for a 17-5 diagnostic code. Expected Result:A 17-5 was not generated when the jumper wire was installed.Results:
OK - A 17-5 diagnostic code was not generated when the jumper wire was installed. The harness and the ECM are OK. There is a problem with the relay.Repair: Perform the following procedure:
Set the engine control to the OFF/RESET mode. Switch the 35 amp circuit breaker OFF.
Remove the jumper wire from the relay's connector on the engine harness.
Inspect the relay's connectors for damage, for moisture, and for corrosion. Make repairs, as needed. If the problem is not resolved, replace the fuel control relay.STOP
Not OK - A 17-5 diagnostic code was generated when the jumper wire was installed. There may be an open circuit in the engine harness. Proceed to Test Step 6.Test Step 6. Check the ECM
Set the engine control to the OFF/RESET mode. Switch the 35 amp circuit breaker OFF.
Use a 151-6320 Wire Removal Tool to remove terminals P2-11 and P2-21.
Illustration 6 g01341998
Typical ECM P2 connector with jumper wire
(3) Jumper wire
(4) P2 connector
Install a jumper wire (3) into terminals P2-11 and P2-21. Pull on the jumper wire in order to verify proper installation.
Switch the 35 amp circuit breaker ON. Set the engine control to the STOP mode. Note: The 17-5 diagnostic code can only be detected when the output for the fuel control relay is OFF. The output is OFF when the engine control is in the STOP mode and the engine is not running.
Wait for 30 seconds and use Cat ET to check for an active 17-5 diagnostic code. Expected Result:There is no active 17-5 diagnostic code.Results:
OK - When the jumper wire was installed, there was no active 17-5 diagnostic code. The ECM detects the jumper wire at the P2 connector. However, the ECM did not