VALVE GP-CONTROL 1535442 - Caterpillar

Illustration 1 g00928849
Schematic for the action lampThis diagnostic code is recorded when the main display module reads the current of the circuit for the action lamp and the current is below normal. The action lamp does not light as a result of this diagnostic code. The schematic that is shown above represents a typical installation of the component. Verify the connector contact and the wire numbers by utilizing the Electrical System Schematic for the machine that is being serviced. Test Step 1. CHECK THE LAMP.
At the action lamp, use a jumper to connect wire A487-PU to frame ground.Expected Result:The CID 0324 FMI 05 is no longer present.Results:
OK - The CID 0324 FMI 05 is no longer present. The lamp or the lamp socket is open. Repair: Replace the action lamp. For the purposes of this test, the correct resistance for a lamp is less than 200 ohms. Stop.
NOT OK - The CID 0324 FMI 05 is present. The action lamp is not causing the diagnostic code. Proceed to test step 2.Test Step 2. CHECK THE HARNESS.
Turn the disconnect switch and the key start switch to the OFF position.
Remove the jumper from wire A487-PU to frame ground. Make sure that the action lamp is connected to the machine harness.
Disconnect the machine harness from the main display module.
At the machine harness connector for the main display module, measure the resistance between contact 13 (A487-PU) and frame ground.Expected Result:The resistance is greater than 100 ohms.Results:
OK - The resistance is greater than 100 ohms. The harness circuit is open. Proceed to test step 3.
NOT OK - The resistance is less than 100 ohms. The harness circuit resistance is correct. Replace the main display module.Repair: It is unlikely that the main display module has failed. Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code indicator is illuminated for this diagnostic code. If the cause of the diagnostic code is not found, replace the main display module. See Troubleshooting, "Main Display Module - Replace". Stop.Test Step 3. CHECK THE HARNESS.
At the action lamp, disconnect wire A487-PU from the lamp socket.
Check for an open in the circuit A487-PU. Check between contact 13 of the harness connector for the main display module and the lamp socket.
Check for an open in the circuit 200-BK. Check between the lamp socket and the frame ground.Expected Result:The circuits are correct. Results:
OK - The circuits are correct. Stop.
NOT OK - The circuits are NOT correct.Repair: Repair the harness or replace the harness. Stop.