966G Wheel Loader and 972G Wheel Loader Power Train Caterpillar

CID 0363 FMI 03 Solenoid Valve (Ride Control) Voltage Above Normal - Test

Usage:

972G 1EW

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Illustration 1	g00434866
Ride Control Solenoid Valve Schematic

CID 0363 FMI 03 service code is recorded when the power train electronic control module (ECM) reads the voltage of the solenoid circuit as above normal (short to +battery).

Note: Ensure that the service code CID 0363 FMI 03 for the solenoid is active.

Before performing this procedure, refer to table 1 in order to determine the connector contact number and the wire number that corresponds to the failed circuit.

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Table 1
Solenoid Valve Information
Fault	Connector Contact No. ⁽¹⁾	Wire No.
Ride Control Solenoid	J1-18	976-OR

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^( 1 )

Connector contact Number of the power train ECM.

Note: All solenoid return lines are joined to connect to contacts J1-7 and J2-3 (wire 975-WH) of the power train ECM.

Note: The approximate coil resistance of the solenoid valve is 20 to 60 ohms.

Check the solenoid signal circuit for a short to the +battery.
1. Turn the key start switch and the disconnect switch to the OFF position.
1. Disconnect the machine harness from the suspected solenoid.
1. Disconnect the machine harness connectors J1 and J2 from the power train ECM.
1. At the machine harness connector J1 and J2, measure the resistance from the solenoid signal contact (refer to table 1) to all possible sources of +battery. The possible sources of positive voltage are connector J1 contacts: 1, 4, 6, 8, 10, 11, 12, 17, 18 and 40. For connector J2, the positive voltage contacts are 1, 2, 7, 8, 13, 19 and 37.
  Expected Result: Each resistance should be greater than 5000 ohms.
  Results:
  - OK - The machine harness is correct. Proceed to next step.
  - NOT OK - There is a short in the machine harness. The short is between the solenoid signal contact (refer to table 1) and the circuit with low resistance measurement. Repair the machine harness or replace the machine harness. STOP.

Check if the fault is still present.
1. Inspect the contacts and clean the contacts of the harness connectors.
1. Reconnect all the harness connectors.
1. Turn the disconnect switch and the key start switch to the ON position.
1. Enter the Service Mode of the Caterpillar Monitoring System. Clear all inactive faults.
1. Attempt to operate the machine in all gears. All gears may not be available.
1. Stop the machine and engage the parking brake.
1. Check to see if CID 0363 FMI 03 service code for the solenoid is active.
  Expected Result: The CID 0363 FMI 03 service code for the solenoid is active.
  Results:
  - YES - The fault has not been corrected. It is unlikely that the power train ECM is faulty. Perform the previous steps again. If the cause of the fault is not found, replace the power train ECM. Refer to Testing and Adjusting, "Electronic Control Module (Power Train) - Replace" for more information on replacing the power train ECM. STOP.
  - NO - Fault is NOT active. The fault does not exist at this time. The initial fault was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation. STOP.