Section 5.10
PID 94, FMI 0, Flash Code 47, Fuel Pressure High
The fuel pressure is high due to a faulty sensor connection, a faulty sensor or problem in the fuel system.
Section 5.10.1
Troubleshooting PID 94, FMI 0, Flash Code 47
Troubleshoot as follows:
- Check wire 905 (yellow, Fuel Pressure Sensor) in the Engine Sensor Harness (ESH) 30–pin connector (see Figure
"Engine Sensor Harness 30–pin Connector"
). If there is a short or an open wire, repair or replace the wire(s), pins, and sockets.
Figure 1. Engine Sensor Harness 30–pin Connector
- If PID 94, FMI 0, Flash Code 47 is still active, go to step .
- If PID 94, FMI 0, Flash Code 47 is not active, refer to "5.10.2 Verification" .
- Check the Fuel Pressure Sensor (FPS) using the DDEC Sensor Tester J 37164 (see Figure
"DDEC Sensor Tester J 37164"
).
Figure 2. DDEC Sensor Tester J 37164
- Disconnect the sensor. On Series 60G and 50G engines with a high pressure fuel system, the FPS is installed in a tee at the inlet to the low pressure regulator (see Figure
"Fuel Pressure Sensor Location"
).
Figure 3. Fuel Pressure Sensor Location
- Disengage the locking tang on the three-wire connector. Grasp the body of the connector and gently pull it free of the FPS.
- Use the appropriate wrench on the hex end of the FPS to unscrew it from the inlet tee.
- Connect the sensor to the tester at the correct connector.
- Clip the power leads to the 12 volt power source.
- Plug in a volt OHM meter. The tester will power up the sensor.
- If the sensor should be replaced, refer to "5.10.1.1 Replacing the Fuel Pressure Sensor" .
- If the sensor does not need to be replaced, refer to "5.10.1.2 Checking the Fuel System" .
Section 5.10.1.1
Replacing the Fuel Pressure Sensor
The FPS is non-servicable and should be replaced as a unit. No adjustment is required.
Replace the FPS as follows:
Note: The FPS is an electrical device. Use care on installation.
- On the replacement FPS, use Loctite® Pipe Sealant with Teflon, PT-7260, or equivalent on all but the first two threads of the FPS to prevent leaks.
- Screw FPS into the regulator inlet tee.
- Engage locking tang of the three wire connector to the FPS.
- Turn the ignition to the ON position. Observe the DDR for any diagnostic code(s).
- If PID 94, FMI 0, Flash Code 47 is still active, call Detroit Diesel Technical Service.
- If PID 94, FMI 0, Flash Code 47 is not active. Refer to "5.10.2 Verification" .
Section 5.10.1.2
Checking the Fuel System
Check the fuel system and repair if necessary. When the check and/or repairs are finished:
- If the code is still active, call Detroit Diesel Technical Service.
- If the code is no longer active, refer to "5.10.2 Verification"
Section 5.10.2
Verification
Verify troubleshooting as follows:
- Check the DDR to see if PID 94, FMI 0, Flash Code 47 is still active.
- If the code is still active, go to step 2.
- If the code is not active, troubleshooting is complete.
- If the code is still active, call Detroit Diesel Technical Service.
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Series 50G and 60G Troubleshooting Guide - 6SE482 |
Generated on 10-13-2008 |