Series 50G/60G Troubleshooting – Section 5.12 PID 94, FMI 3, Flash Code 37, Fuel Pressure Sensor Input Voltage High

Section 5.12
PID 94, FMI 3, Flash Code 37, Fuel Pressure Sensor Input Voltage High

Input voltage from the Fuel Pressure Sensor is high due to a short.‪

Section 5.12.1
Troubleshooting PID 94, FMI 3, Flash Code 37

Troubleshoot as follows:‪

1. Check wire 905 (yellow, Fuel Pressure Sensor) cavity M-1 for a short to wire 416 (gray, sensor supply, 5VDC) cavity W-1 in the Engine Sensor Harness (ESH) 30–pin connector (see Figure "Engine Sensor Harness 30–pin Connector" ). Also check pin C (fuel pressure) and pin B (sensor supple, +5VDC) in the Fuel Pressure Sensor connector. If there is a short, repair or replace the wire(s), pins, and sockets.
   

   Figure 1. Engine Sensor Harness 30–pin Connector

   1. If the code is still active, go to step .
   2. If the code is on longer active, refer to "5.12.2 Verification" .
2. Check wire 905 (yellow, Fuel Pressure Sensor) cavity M-1 in the ESH 30–pin connector for a short to +12V/24V (see Figure "Engine Sensor Harness 30–pin Connector" ). Also check pin C (fuel pressure) in the Fuel Pressure Sensor connector. If there is a short, repair or replace the wire(s), pins, and sockets.
   1. If the code is still active, call Detroit Diesel Technical Service.
   2. If the code is on longer active, refer to "5.12.2 Verification" .

Section 5.12.2
Verification

Verify troubleshooting as follows: ‪

1. Check the DDR to see if PID 94, FMI 3, Flash Code 37 is still active.
   1. If the code is still active, go to step 2.
   2. If the code is not active, troubleshooting is complete.
2. If the code is still active, call Detroit Diesel Technical Service.