INDICATOR AS. 1872867 - Caterpillar

Illustration 1 g01252090
ARC solenoid circuit
This diagnostic code is associated with the Automatic Retarder Control (ARC) solenoid valve. This code is recorded when the ECM reads the voltage of the solenoid circuit as being above normal or shorted to +battery.The possible causes of this diagnostic code are listed:
The energize circuit of the solenoid is shorted to the +battery circuit.
The ECM has failed. This is unlikely. Note: Ensure that CID 0711 FMI 03 is on hold and that the diagnostic indicator is illuminated. The nominal coil resistance at room temperature is 8.15 .6 ohms.System Response:When this diagnostic code occurs,the action lamp is ON.Test Step 1. CHECK THE SOLENOID CIRCUIT FOR A SHORT TO THE +BATTERY CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the solenoid.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At the machine harness connector, measure the resistance from signal contact J1-54 (wire H863-BU(Blue) ) to all contacts that are used in the machine harness connectors for the ECM. Expected Result:Each resistance measurement should be greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to test step 2.
NOT OK - One or more resistance measurements is not correct. There is a short in the machine harness. The short is between signal contact J1-54 (wire H863-BU(Blue) ) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the contacts.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Clear all of the inactive diagnostic codes.
Operate the machine.
Check if the CID 0711 FMI 03 is present. The diagnostic indicator is illuminated. Expected Result:The diagnostic code for the solenoid is NOT present. The diagnostic indicator is NOT illuminated.Results:
YES - The diagnostic code is NOT present. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.STOP
NO - The diagnostic code has not been corrected. The ECM may have failed.Repair: It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP