VALVE G 0692260 - Caterpillar

Illustration 1 g03676938
Schematic of the brake accumulator oil pressure sensor for brake application and alert indicatorThis diagnostic code is associated with the brake accumulator oil pressure sensor for brake application and alert indicator. The sensor is connected to one input of the Power Train ECM. The contact is open during proper operation.The FMI 04 means that the ECM has determined that the normally open circuit is grounded.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 1612 FMI 04 is active before performing this procedure.Test Step 1. CHECK THE SENSOR
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness from the sensor.
Turn the key start switch and the disconnect switch to the ON position.Expected Result:The CID 1612 FMI 04 has been replaced by CID 1612 FMI 03.Results:
YES - The CID 1612 FMI 04 has been replaced by CID 1612 FMI 03. The machine harness and the ECM are correct. Proceed to Test Step 3.
NO - The CID 1612 FMI 04 is still active. Proceed to Test Step 2.Test Step 2. CHECK THE HARNESS
Turn the disconnect switch and the key start switch to the OFF position.
The machine harness remains disconnected from the sensor.
Disconnect the machine harness connector\s from the ECM.
Measure the resistance between contacts J2-50 (wire X779-GY) 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 5 ohms.Results:
YES - Each resistance measurement is greater than 5 ohms. Proceed to Test Step 3
NO - One or more of the resistance measurements are less than 5 ohms. The harness has failed. The short is between J2-50 (wire X779-GY) and the circuit with the lowest resistance.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE OPERATION OF THE SENSOR
The machine harness remains disconnected from the sensor.
Measure the resistance between contact C and contact D of the harness connector for the sensor.
Measure the resistance between contact C and contact B of the harness connector for the sensor.Expected Result:The resistance from contact