PUMP GP-PS- 1986040 - Caterpillar

Illustration 1 g06074210
All the electrical connectors may not be shown. Refer to the schematic for more detail.
Note: Refer to Troubleshooting, "Electrical Connectors" for an Illustration of the ECM and Connectors.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Connect Cat® Electronic Technician (ET) to the service tool connector.
B. Determine if a code is active or logged.
Codes
Result: An 18-7, 18-11, 18-12, 1076-7, 1076-11, or 1076-12 code is present.
Repair: A failed FCV has been detected.
1. Release the pressure in the high-pressure rail by loosening the end plug on one of the last two fuel accumulators. Refer to Testing and Adjusting, "Fuel Rail Pressure - Release" for instructions on how to release the pressurized fuel.
2. Verify the "Fuel Rail Pressure" reading in ET is 0 8 MPa (0 1160 psi) prior to servicing the fuel system.
3. Replace the FCV.
Proceed to Test Step 9.
Result: An 18-8 or 1076-8 code is present.
Proceed to Test Step 2.
Result: A 1028-6 or 3597-6 code is active.
Proceed to Test Step 5.
2. Check the Wiring Between the ECM and the FCV for an Open Circuit
A. Turn the keyswitch to OFF.
B. Disconnect the fuel control valve from the wiring harness.
C. Disconnect the ER-C2 ECM connector from the engine ECM.
D. Measure the resistance between pin 51 on the ER-C2 ECM connector and pin 11 on the FCV connector.
Open Circuit
Results: Less than 10 ohms of resistance between pin 51 on the ER-C2 engine ECM connector and pin 11 on the FCV