Workshop Manual

4B2–1
DRIVE LINE CONTROL SYSTEM (TOD)
AXIOM
DRIVELINE/AXLE
DRIVELINE CONTROL SYSTEM (TOD)
CONTENTS
Service Precaution 4B2–1. . . . . . . . . . . . . . . . . . . . . .
General Description 4B2–2. . . . . . . . . . . . . . . . . . . . .
Transfer Position and Drive Mode 4B2–2. . . . . . . .
TOD Control 4B2–3. . . . . . . . . . . . . . . . . . . . . . . . . .
TOD Indicator Control 4B2–3. . . . . . . . . . . . . . . . . .
Abbreviations 4B2–3. . . . . . . . . . . . . . . . . . . . . . . . .
System Components 4B2–4. . . . . . . . . . . . . . . . . . . .
Parts Location 4B2–4. . . . . . . . . . . . . . . . . . . . . . . .
Front and Rear Speed Sensors 4B2–5. . . . . . . . . .
Electromagnetic Coil 4B2–5. . . . . . . . . . . . . . . . . . .
Multi Plate Disk Clutch Pack 4B2–5. . . . . . . . . . . .
Mechanical Lock Sleeve 4B2–5. . . . . . . . . . . . . . . .
High-Low Planetary Gear Set 4B2–6. . . . . . . . . . .
4H and 4L Switch 4B2–6. . . . . . . . . . . . . . . . . . . . . .
Transfer Connector (12-pin type) 4B2–6. . . . . . . .
Transfer Connector (8-pin type) 4B2–6. . . . . . . . .
TOD Indicator Lamps
(on the instrument panel) 4B2–7. . . . . . . . . . . . . .
Check Lamp 4B2–7. . . . . . . . . . . . . . . . . . . . . . . . . .
TOD ECU 4B2–8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Low Shift Motor 4B2–9. . . . . . . . . . . . . . . . . . .
Motor Position and Encoder Position Code 4B2–10
Encode Position Plate 4B2–10. . . . . . . . . . . . . . . . . .
Shift High Range and Low Range 4B2–10. . . . . . . .
Functions of TOD Switch and Indicator
Lamp 4B2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOD Switch and Indication of Drive Mode 4B2–11.
Check Lamp 4B2–13. . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis 4B2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Information Diagnosis 4B2–14. . . . . . . . . .
Self-diagnosis 4B2–14. . . . . . . . . . . . . . . . . . . . . . . . .
Precautions on Diagnosis 4B2–16. . . . . . . . . . . . . . .
Basic Diagnostic Flow Chart 4B2–18. . . . . . . . . . . . . .
Parts Location 4B2–19. . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Diagram 4B2–20. . . . . . . . . . . . . . . . . . . . . . . . .
Connector List 4B2–24. . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Failed Pin 4B2–26. . . . . . . . . . . . . . . . . . . . .
Connector Pin Assignment 4B2–26. . . . . . . . . . . . . .
Reference 4B2–28. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Failed TOD Control Unit Pin 4B2–30. . . . .
Tech 2 Scan Tool 4B2–32. . . . . . . . . . . . . . . . . . . . . .
Getting Started 4B2–33. . . . . . . . . . . . . . . . . . . . . . . .
Operating Procedure 4B2–33. . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Codes 4B2–35. . . . . . . . . . . . . . . .
Diagnosis from Trouble Codes 4B2–36. . . . . . . . . . . .
Trouble Diagnosis Depending on The Status
of TOD Indicator 4B2–67. . . . . . . . . . . . . . . . . . . . . . . .
Diagnosis from Symptom 4B2–102. . . . . . . . . . . . . . . . .
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
SECTION