MANIFOLD GP-EXHAUST 6I0561 - Caterpillar

Illustration 1 g02358996
Connections of the backup alarmThis diagnostic code is associated with the backup alarm. The FMI 05 means that the ECM has determined that the current of the alarm circuit is below normal. The possible causes of this diagnostic code are listed below:
The energize circuit of the alarm is open.
The return circuit of the alarm is open.
The alarm has failed.
The ECM has failed. The ECM failing is unlikely.Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all of the connections in the circuit are clean and secure. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear the diagnostic codes when the problem has been corrected. Verify that the CID 0637 FMI 05 is active before performing this procedure.Use a digital multimeter for the measurements in this procedure.Test Step 1. CHECK THE ALARM.
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the alarm with the active diagnostic code from the machine harness.
At the machine harness connector for the alarm, place a jumper wire from contact 1 (wire 321-BR) to contact 2 (wire J815-BK).
Observe the status of the diagnostic code.Expected Result:The diagnostic code remains active. The FMI 05 is still active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 2.
NO - The diagnostic is no longer active. The alarm has failed.Repair: The alarm has failed. Repeat this Test Step "CHECK THE ALARM" in order to verify the failure of the alarm. Replace the alarm. Verify that the new alarm corrects the problem.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the ECM.
The jumper wire that was installed in the previous test remains in place.
At the machine harness connector, measure the resistance from signal contact J2-6 (wire 321-BR) to frame ground.Expected Result:The resistance is less than 5.0 ohms.Results:
OK - The resistance is less than 5.0 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5000 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire 321-BR or in wire J815-BK of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the harness connectors. Clean the contacts of the harness connectors and check the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.
Perform a 45 N (10 lb) pull test on each of the wires that are associated with the circuit.
Reconnect all harness connectors in order