LIGHTING GP-ROADING 7V8474 - Caterpillar

Illustration 1 g02711219
Connections of the Hydrostatic Pump Solenoid #2This diagnostic code is associated with the hydrostatic pump solenoid #2. The FMI 06 means that the Transmission ECM has determined that the current of the solenoid is above normal.The possible causes of this diagnostic code are:
The energize circuit of the solenoid is shorted to ground or the coil resistance is too low.
The solenoid has failed.
The ECM has failed. The ECM failing is unlikely.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 1762 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.
Disconnect the machine harness from the pump control B solenoid.
At the machine harness connector for the solenoid, place a jumper wire from connector contact 1 (wire A769-GY) to connector contact 2 (wire H801-PU).Expected Result:The CID 1762 FMI 06 diagnostic code changes to a CID 1762 FMI 05 diagnostic code.Results:
OK - The CID 1762 FMI 06 diagnostic code changes to a CID 1762 FMI 05 diagnostic code. The solenoid has failed.Repair: Replace the solenoid.STOP
NOT OK - The CID 1762 FMI 06 diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE ENERGIZE CIRCUIT FOR A SHORT TO GROUND
Turn the key start switch and the disconnect switch to the OFF position.
Remove the jumper wire fitted in the previous Test Step.
Disconnect the machine harness connector from the ECM.
At the machine harness connector, measure the resistance from connector contact J1-49 (wire A769-GY) to all possible sources of ground.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 less than 5 ohms. There is a short in the machine harness. The short is between J1-49 (wire A769-GY) and the circuit with the low resistance measurement.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE IS STILL ACTIVE
Insure the key start switch and the disconnect switch are in the OFF position.
Remove all jumper wires previously installed on any connector.
Inspect the contacts and clean the contacts of the harness connectors.
Reconnect all disconnected machine harness connectors. Ensure that all the connectors are fully seated. Observe that the clips for each connector are securely fastened.
Turn the key start switch and the disconnect switch to the ON position.
Clear all inactive diagnostic codes.
Operate the machine.
Check the status of the CID 1762 FMI 06 diagnostic code.Expected Result:The CID 1762 FMI 06 diagnostic code is not active.Results:
OK - The CID 1762 FMI 06 diagnostic code is not active. The problem does not