VALVE AS-WATER 5270758 - Caterpillar

Illustration 1 g00930971
This diagnostic code is associated with the switch for the toggle switch (left conveyor mode) for the left station. The FMI 02 means that the ECM determined that the signal is intermittent, erratic, or incorrect. The ECM could be receiving invalid combinations from the circuit.System Response:When this diagnostic code is active, the following occurs:
The left conveyor will default to automatic mode.
The fault lamp for the material system, the tamp system, and the auxiliary system is ON.
The action lamp is ON.Test Step 1. CHECK THE CONTINUITY OF THE SWITCH IN THE OFF POSITION
Turn the key start switch to the OFF position.
Remove the switch from the dash.
Unplug the switch from the wire harness.
With the switch in the OFF position, check the resistance from terminal 2 to the following terminals: terminal 1 and terminal 3.Expected Result:The resistances should be greater than 5000 ohms.Results:
OK - The resistances are greater than 5000 ohms. Proceed to Test Step 2.
NOT OK - The resistance is less than 5000 ohms on one of the readings.Repair: The switch has failed. Replace the switch. Stop.Test Step 2. CHECK THE CONTINUITY OF THE SWITCH IN THE AUTO POSITION
Press and hold the switch in the AUTO position.
With the switch in the AUTO position, check the resistance from terminal 2 to terminal 1 and to terminal 3.Expected Result:The resistances should be less than 5 ohms on terminals 1 and 2. The resistances should be greater than 5000 ohms on terminals 2 and 3.Results:
OK - The resistances are correct. Proceed to Test Step 3.
NOT OK - The resistances are not less than 5 ohms on either terminal 1 or terminal 2 or the resistances are not greater than 5000 ohms on either terminal 3 or terminal 2.Repair: The switch has failed. Replace the switch. Stop.Test Step 3. CHECK THE CONTINUITY OF THE SWITCH IN THE MANUAL POSITION
Place the switch in the MANUAL position.
With the switch in the MANUAL position, check the resistance from terminal 2 to terminal 1 and to terminal 3.Expected Result:The resistances should be less than 5 ohms on terminals 3 and 2. The resistances should be greater than 5000 ohms on terminals 1 and 2.Results:
OK - The resistances are correct. Proceed to Test Step 4.
NOT OK - The resistances are not less than 5 ohms on either terminal 3 or terminal 2 or the resistances are not greater than 5000 ohms on terminals 2 or terminal 1.Repair: The switch has failed. Replace the switch. Stop.Test Step 4. CHECK THE HARNESS
The disconnect switch and the key start switch remain in the OFF position.
The machine harness remains disconnected from the switch.
Disconnect the machine harness connectors from the ECM.
Measure the resistance between contacts J1-38 (wire K723-PU) and J1-39 (wire K722-YL) of the machine harness to all the contacts that are used in machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
YES - Each resistance measurement is greater than 5000 ohms. The ECM has failed.Repair: It is unlikely that the ECM has failed. Exit this procedure and