Navistar T444 Electronic Diagnostics Manual 1993-1997

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Navistar T444 Electronic Diagnostics Manual 1993-1997

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• Model Years:  1993-1997
• Serial numbers: 000500 thru 634233

Coverage includes:

Section 1

• Fuel Supply System Injection
• Control Pressure System Injector Operation
• Exhaust Back Pressure Device
• Electronic Control Module
• Injector Drive Module
• Sensor Operation
• Vehicle Features
• Diagnostic Software
• Self-test Operation

Section 2

• Diagnostic Forms
• Hard Start / No Start Diagnostics
• Performance Diagnostics
• Performance Specifications

Section 3

• Electronic Control System Diagnostics
• Electronic Control System Diagnostic Flash Codes
• Circuit Index Sensor and Actuator Locations
• Sensor and Actuator Diagnostic Procedures
• Circuit Function and Diagnostics

1. Accelerator Pedal Position Sensor / Idle Validation Switch
2. Barometric Pressure Sensor
3. Brake Switch / Relay Circuits
4. Camshaft Position Sensor
5. Data Communication Links
6. Exhaust Bach Pressure Sensor
7. Engine Crank Inhibit
8. Engine Coolant Level System for Engine Protection
9. Electronic Control Module Self Diagnostics
10. ECM/IDM Communications
11. Electronic Control Module Power Supply
12. Engine Coolant Temperature Sensor
13. Engine Data Line Circuits w/ Allison AT/MT Transmissions
14. Engine Oil Pressure Sensor
15. Engine Oil Temperature Sensor
16. Exhaust Back Pressure Regulator
17. Glow Plug Control
18. Intake Air Temperature Sensor
19. Injection Control Pressure Sensor
20. Injector Driver Module Power Circuits
21. Injector Drive Circuits
22. Injector Pressure Regulator
23. Keep Alive Memory Power
24. Manifold Absolute Pressure Sensor
25. Speed Control Command Switches and PTO Controls
26. Self Test Input Switch and Engine Warning Light
27. Tachometer Input Circuits
28. Two Speed Axle Circuit
29. Voltage Reference Circuits
30. Vehicle Personality Module Fuel/Hour Meter and Odometer
31. Vehicle Speed Signal
32. Connector End Views and Pin-Outs

Section 4 Supplemental Diagnostic Analysis

Section 5 Diagnostic Tool Use Section

Section 6 Connector and Harness Repair Section

Section 7 Vehicle and Component Illustrations

Section 8 Glossary of Technical Terms

Manufacturer reserves the right to make changes without prior notice.

While this is a factory manual, we are not representing to be an agent of this manufacturer

Navistar T444 Electronic Diagnostics Manual 1993-1997

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