Navistar International DT 466 Diagnostic/Troubleshooting Manual page 510

506 7 ELECTRONIC CONTROL SYSTEMS DIAGNOSTICS
Figure 487 MAP circuit diagram
Operational Voltage Checks for MAP Sensor with Breakout Harness (Check with breakout harness
connected to sensor and engine harness.)
Test Point
3 (Green) to 1 (Black) 0.92 V
3 (Green) to 1 (Black) 1.73 V
3 (Green) to 1 (Black) 2.72 V
3 (Green) to 1 (Black) 3.71 V
3 (Green) to 1 (Black) See appropriate performance specification
Operational Voltage Checks for MAP Sensor with Breakout Box (Check with breakout box connected
[X1 and X2 only] to the ECM and engine harness.)
X2–3 to X1–6
X2–3 to X1–6
X2–3 to X1–6
X2–3 to X1–6
X2–3 to X1–6
"DT 466 Performance Specifications" – Appendix A (page 595)
"DT 570 and HT 570 Performance Specifications – Appendix B (page 619)
MAP Diagnostic Trouble Codes
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
EST voltage readings:
Signal to ground
below.
0.92 V
1.73 V
2.72 V
3.71 V
See appropriate performance specification
below.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
Spec
0 kPa (psi)
55 kPa (8 psi)
129 kPa (18 psi)
193 kPa (28 psi)
0 kPa (psi)
55 kPa (8 psi)
129 kPa (18 psi)
193 kPa (28 psi)
EGES-270-1
Comment
Voltage with key-on engine-off.
Atmospheric pressure dependent
on altitude and BAP pressure.
Rated speed, full load
Voltage with key-on engine-off.
Atmospheric pressure dependent
on altitude and BAP pressure.
Rated speed, full load