Allison HD 4560 User Manual

TS2470EN
Printed in the U.S.A. Copyright © 1998 General Motors Corp.
Troubleshooting
Manual
Division of General Motors Corporation
P.O. Box 894 Indianapolis, Indiana 46206-0894
May 1998
Revision 1, 199910
Allison Transmission
MD/HD/B Series Transmissions
WTEC II Controls
(Pre-TransID and TID 1)
MD 3060/MD 3066/MD 3560(P)(R)
MD 3070PT
HD 4060/HD 4560(P)(R)
B 300/B 400/ B 500(P)(R)

Allison HD 4560 Specifications

General

Brand	Allison
Model	HD 4560
Category	Microphone system
Language	English

Summary

SECTION 1. GENERAL DESCRIPTION

1 1. TRANSMISSION

Describes the overall transmission system and its electronic control components.

1 2. ELECTRONIC CONTROL UNIT (ECU)

Details the Electronic Control Unit (ECU) as the brain of the control system.

1 7. WIRING HARNESSES

Explains the function and types of wiring harnesses in the WTEC II system.

SECTION 4. WIRE CHECK PROCEDURES

4 1. CHECKING OPENS, SHORTS BETWEEN WIRES, AND SHORTS-TO-GROUND

Details procedures for checking wires for opens, shorts between wires, and shorts-to-ground.

SECTION 6. DIAGNOSTIC CODES

6 1. DIAGNOSTIC CODE MEMORY

Explains how diagnostic codes are logged and stored in memory.

6 2. CODE READING AND CODE CLEARING

Describes methods for reading and clearing diagnostic codes via shift selector or Pro-Link®.

6 5. DIAGNOSTIC CODE LIST AND DESCRIPTION

Provides a comprehensive list of WT Series diagnostic codes and their descriptions.

SECTION 8. GENERAL TROUBLESHOOTING OF PERFORMANCE COMPLAINTS

Table 8 1. Troubleshooting Performance Complaints

Lists common performance issues, probable causes, and suggested remedies.

APPENDICES

Appendix A — IDENTIFICATION OF POTENTIAL CIRCUIT PROBLEMS

Discusses common circuit problems and methods for finding intermittent faults.

Appendix E — CONNECTOR PART NUMBERS, TERMINAL PART NUMBERS, TOOL PART NUMBERS, AND REPAIR INSTRUCTIONS

Lists connector, terminal, and tool part numbers for wiring harness repair.

Appendix F — THROTTLE POSITION SENSOR ADJUSTMENT

Details the procedure for adjusting the throttle position sensor (TPS).