Allison Transmission – 3000 and 4000 Electronic Controls


Troubleshooting Manual


Allison Transmission :

This manual provides troubleshooting information for the 3000 and 4000 Product Families Transmissions. Service Manuals SM2148EN and SM2457EN. plus Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual.

This manual includes:
• Description of the WTEC III electronic control system.
• Description of the electronic control system components.
• Description of diagnostic codes, system responses to faults, and troubleshooting.
• Wire, terminal, and connector repair information.

Specific instructions for using many of the available or required service tools and equipment are not included in this manual. The service tool manufacturer will furnish instructions for using the tools or equipment.

Additional information may be published from time to time in Service Information Letters (SIL) and will be included in future revisions of this and other manuals. Please use these SILs to obtain up-to-date information concerning Allison Transmission products.

This publication is revised periodically to include improvements, new models, special tools, and procedures. A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. Check with your Allison Transmission service outlet for the currently applicable publication. Additional copies of this publication may be purchased from authorized Allison Transmission service outlets. Look in your telephone directory under the heading of Transmissions—Truck. Tractor, etc.

Take time to review the Table of Contents and the manual. Reviewing the Table of Contents will aid you in quickly locating information.

3000 HS, 3500 RDS, B 300(P)(R)
3000 RDS, 3500 EVS, B 400(P)(R)
3000 EVS, T200
3000 MH, T300
3000 PTS
3000 TRV
3200 SP 3500 SP 3700 SP
3200 TRV
MD 3060, MD 3560, MD 3070PT
MD 3066
4000 EVS, 4500 EVS, 4700 EVS, 4800 EVS, B500
4000 HS, 4500 HS, 4700 RDS
4000 MH, 4500 RDS
4000 RDS, 4500 SP
4000 TRV, 4500 TRV
HD 4060, HD4560, HD 4070, HD 4076, B500P
HD 4060P, HD 4560P, HD 4070P, B500R
HD 4060R, HD 4560R, HD 4070R, B 500PR
HD 4060PR, HD 4560PR, HD 4070PR, T425, T450