PUMP GP-METERING 1923897 - Caterpillar

Illustration 1 g03398602
Schematic of the Solenoids (Prefix: XFA, TTN, FKY, RKY)
Illustration 2 g03398627
Schematic of the Solenoids (Prefix: GBJ)
Illustration 3 g03398638
Schematic of the Solenoids (Prefix: TMX)
Note: The diagram above is a simplified schematic of the Machine ECM and the Solenoids. The schematic is electrically correct. However, not all of the possible harness connectors are shown. Refer to the latest revision of Electrical System Schematic, UENR1586, "303.5E, 304E, 305E AND 305.5E EXCAVATOR ELECTRICAL SCHEMATIC" (Prefix: XFA, TTN, FKY, RKY). Electrical System Schematic, UENR1607, "308E CR EXCAVATOR ELECTRICAL SCHEMATIC"(Prefix: GBJ) Electrical System Schematic, UENR3897, "308E2 CR EXCAVATOR ELECTRICAL SCHEMATIC"(Prefix: TMX). Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
Table 2
Troubleshooting Test Steps Values Results
1. Identify Active FMI Code Associated With Solenoid Circuit
Code present. FMI 3 diagnostic code, proceed to Test Step 2.
FMI 5 diagnostic code, proceed to Test Step 3.
FMI 6 diagnostic code, proceed to Test Step 5.
Begin Process For FMI 3 Troubleshooting HERE
2. Check The Machine Harness For A Short
A. Turn the key start switch and the disconnect switch OFF.
B. Disconnect the harness connection at solenoid.
C. If the solenoid is connected to the ECM, disconnect all ECM connectors. If the solenoid is connected to the switch panel, disconnect all switch panel connectors.
D. Measure the resistance of solenoid signal contact to all ECM connectors, if the solenoid is wired directly to the ECM. If the solenoid is wired directly to the switch panel, measure resistance of solenoid contact to all switch panel connectors.
Each reading is greater than 5K Ω. OK - All resistance readings are greater than 5K Ω .
Proceed to Test Step 7.
NOT OK - One or more readings are less than 5 Ω.
Repair -A short exists between the signal contact and the circuit with the low resistance. Repair or replace the machine harness.
Note: A resistance that is greater than 5 Ω but less than 5K Ω would indicate a loose connection or a corroded connection in the circuit. A resistance measurement that is greater than 5K Ω would indicate an open in the circuit.
STOP
Begin Process For FMI 5 Troubleshooting HERE
3. Check The Solenoid.
A. Turn the key start switch and the disconnect switch OFF.
B. Disconnect the solenoid from the machine harness.
C. Place a jumper wire between contact 1 and contact 2, at the harness connector for the solenoid.
D. Turn the key start switch and the disconnect switch ON. Do not start the engine.
E. As the jumper is removed and connected to the contacts, observe any code change.
The code changes to FMI 6 after the jumper wire is installed. OK - The circuit is correct., the solenoid has failed.
Repair: Replace the solenoid.
After replacement of the solenoid , confirm the diagnostic code is