AFTERCOOLER AS 2459361 - Caterpillar

Illustration 1 g01801173
Schematic of the "Attachment Valve #1 Retract" Pressure Solenoid
This diagnostic code is associated with the "Attachment Valve #1 Retract" Pressure Solenoid. The FMI 06 diagnostic code means that the ECM has determined that the current of the solenoid is above normal.The possible causes of this diagnostic code are listed:
The solenoid energizer circuit of the modulating valve is shorted to ground.
The solenoid has failed.
The ECM has failed. This is unlikely. Note: The Machine ECM is equipped with LED indicators that serve as a self-diagnostic check. With the key start switch ON, the following can be determined by the ECM indicator lights: If all of the LED lights are Off, voltage is not being supplied to the Machine ECM. Check for power to the ECM. If the yellow LED is Flashing, a communication error exists on the "CAN" data-link circuit. If the yellow LED is constantly On, the Machine ECM software may be missing / not loaded. If the red LED is Flashing, the Machine ECM has failed and may need replacement. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1596 FMI 06 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When this diagnostic code is active, the ECM will turn off the current to the failed solenoid.Test Step 1. CHECK THE SOLENOID
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the solenoid with the active diagnostic code from the machine harness. Expected Result:The CID 1596 FMI 06 diagnostic code changes to a CID 1596 FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The CID 1596 FMI 06 diagnostic code changes to a CID 1596 FMI 05 diagnostic code when the solenoid is disconnected. The circuit is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.STOP
NO - The CID 1596 FMI 06 diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE SOLENOID ENERGIZER CIRCUIT FOR A SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFF position.
The solenoid remains disconnected from the machine harness.
Disconnect the machine harness connector(s) from the ECM.
At the machine harness connector, measure the resistance from the signal contact J2-32 (wire K860-BU(Blue)) to all contacts that are used in the machine harness connectors for the ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J2-32 (wire K860-BU(Blue)) and the circuit with the low resistance measurement.Repair: