Navistar International DT 466 Diagnostic/Troubleshooting Manual page 416

412 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Operational Voltage Checks for EFP Sensor without Breakout Harness (Check with breakout box
connected [X1 and X2 only] to the ECM and engine harness.)
Test Point EST voltage readings:
Signal to ground
X2–3 to 0.66 V
X1–6
X2–3 to 1.65 V
X1–6
X2–3 to 3.13 V
X1–6
X2–3 to 4.1 V
X1–6
EFP Diagnostic Trouble Codes
DTC 136 = Signal voltage was < 0.039 V for more than 0.35 second
DTC 137 = Signal voltage was > 4.9 V for more than 0.35 second
DTC 371 = Engine fuel pressure is above normal operating range
DTC 372 = Engine fuel pressure is below normal operating range
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Spec
5 kPa (0.75 psi)
138 kPa (20 psi)
345 kPa (50 psi)
483 kPa (70 psi)
EGES-270-1
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Checks
Voltage with key-on engine-off.
Voltage with key-on engine-off.
Voltage with key-on engine-off.
Rated speed, full load