Navistar INTERNATIONAL DT 466 User Manual

7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS 411
Figure 440 EFP circuit diagram
Operational Voltage Checks for EFP Sensor with Breakout Harness (Check with breakout harness
connected to sensor and engine harness.)
Test Point
EST voltage readings:
Signal to ground
Spec Comment
3 (Green) to 1 (Black)
0.66 V
5kPa(0.75psi)
3 (Green) to 1 (Black)
1.65 V
138kPa(20psi)
3 (Green) to 1 (Black)
3.13 V
345kPa(50psi)
3 (Green) to 1 (Black)
4.1 V
483kPa(70psi)
Voltage with key-on engine-off.
Operational Voltage Checks for EFP Sensor with Breakout Box (Check with breakout box connected
[X1 and X2 only] to the ECM and engine harness.)
X2–3 to X1–6 0.66 V
5kPa(0.75psi)
X2–3 to X1–6 1.65 V
138kPa(20psi)
X2–3 to X1–6 3.13 V
345kPa(50psi)
X2–3 to X1–6 4.1 V
483kPa(70psi)
Voltage with key-on engine-off.
EFP Diagnostic Troubl
e Codes
DTC 136 = Signal voltage was < 0.039 V for more than 0.35 second
DTC 137 = Signal voltage w as > 4. 9 V for more than 0.35 second
DTC 371 = Measured f
uel pressure was greater than expected pressure by 100 kPa (15 psi) for more
than 60 seconds.
DTC 372 = Measured fuel pressu re was greater than expected pressure by 103 kPa (15 psi) for more
than 30 seconds.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.

Navistar INTERNATIONAL DT 466 Specifications

General

Brand	Navistar
Model	INTERNATIONAL DT 466
Category	Engine
Language	English