TUBE AS 4956118 - Caterpillar

Illustration 1 g01162412
Schematic for the Ride Control Pressure Equalizationsolenoid 2
A diagnostic code associated with the Ride Control Pressure Equalizationsolenoid 2. An FMI 03 means the Power Train ECM has determined the voltage of the solenoid circuit is above normal. Possible causes for the diagnostic code are:
The energize circuit of the solenoid is shorted to the +battery circuit.
The ECM may have failed, but is unlikely.Note: Poor connections are often the cause of a problem in electrical circuits. Before performing this procedure, inspect all the machine harnesses and connectors involved in the circuit. Make sure to verify that all of the connections in the circuit are clean, secure, and in good condition. Correct any problems found with any of the connections. Verify the diagnostic code CID 0149 FMI 03 is still active, before continuing with this procedure.Note: The following test procedure may create other diagnostic codes. Ignore all the created diagnostic codes now, but clear all those codes after the cause for the original diagnostic code has been corrected. System Response:When this diagnostic code occurs, the ride control function will always remain active.Test Step 1. CHECK THE SOLENOID CIRCUIT FOR A SHORT .
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the harness connector from the Ride Control Pressure Equalization solenoid.
Disconnect both the J1 and J2 harness connectors from the Power Train ECM.
At the harness connectors for the ECM, measure resistance from contact J1-12 (wire N939-GN(Green)) to all contacts that are used in the J1 and J2 harness connectors for the ECM. Expected Result:Each measurement is more than 5000 ohms. Results:
YES - Each measurement is more than 5000 ohms. The harness is correct. Go to Test Step 2.
NO - Each measurement is not more than 5000 ohms. The harness has a short between J1-12 (N939-GN(Green)) and the circuit with a low resistance. Repair: Repair or replace the harness.Go to Test Step 2.Test Step 2. CHECK THE DIAGNOSTIC CODE STATUS.
Inspect and clean all contacts in the harness connectors. Reconnect all harnesses. Make sure all the connectors are securely tightened.
Turn the disconnect switch and the key start switch to the ON position.
Clear all inactive diagnostic codes.
Operate the machine.
Determine if the CID 0149 FMI 03 is active. Expected Result:The diagnostic code is no longer active. Results:
YES - The CID 0149 FMI 03 code is no longer active. The code does not exist at this time. Repair: The cause for the code has been corrected. Return the machine to normal operations.STOP
NO - The CID 0149 FMI 03 code is still active. The cause for the code has not been corrected. Repair: If you have not inspected the harness connectors in a previous Test Step, do that now. Clean the contacts of the harness connectors. Check the wires for damage to the insulation 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 sensor circuit.Perform a “wiggle test” on the sensor circuit of the machine wiring harness,