WHEEL-INTERNAL 5062959 - Caterpillar

Illustration 1 g01037835
Schematic of the solenoid valve for the two speedTest Step 1. CHECK FOR A SHORT TO + BATTERY IN THE WIRE HARNESS
Turn the key start switch to the OFF position.
Remove the floorplate in order to get to the ECM.
Disconnect the wire harness from the ECM.
Measure the resistance from contact 5 (wire P981-PU) to the following contacts of the wiring harness: contact 1, contact 24, contact 40, contact 42 and contact 58.Expected Result:The resistances should be greater than 5000 Ohms.Results:
OK - The resistances were greater than 5000 Ohms.Repair: The ECM is very unlikely to have failed. Reconnect all connections and visually inspect the wire harness. Verify that the values that are present on the machine configuration screen match the machine's options. Verify that the values that are present on the machine configuration screen are installed correctly. Verify that the diagnostic code still exists. If the diagnostic code still exists perform the test steps again.Replace the ECM, if the cause of the diagnostic code was not found after the second attempt. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Stop.
NOT OK - The resistance was less than 5000 Ohms on one of the readings.Repair: There is a short in the wire harness. Locate the short. Repair the wire harness or replace the wire harness. Stop.