FOREWORD-How to Use This Manual Welcome to the TS3989EN Troubleshooting Manual.

Allison Transmission Incorporated strives to make every effort to keep our service information current and accurate. Because of the time lag involved with writing and printing processes, the Transmission Control Module (TCM) may report a Diagnostic Trouble Code (OTC) that has not yet been added to this document. If you encounter a OTC that is not yet in this publication, please call Allison Transmission at 1-800-252-5283. This manual provides troubleshooting information for the 3000 and 4000 Product Families Transmissions. Service Manuals SM4013EN and SM4014EN, plus Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual. This manual includes: • Description of the 3000 and 4000 Product Families Allison 4th Generation Electronic Control system.

• Description of the electronic control system components.

• Description of Diagnostic Trouble Codes (DTCs), system responses to faults, and troubleshooting steps for active DTCs.

• Wire, terminal, and connector repair information.

• System schematics.

• System wiring diagrams.

• Troubleshooting complaints without DTCs.

• lnpuUOutput Wiring Diagrams.

Instructions for using the service tools used to troubleshoot active DTCs and make connector repairs are included in this manual. Refer to the appropriate service manuals for procedures and instructions to service tools used to overhaul the transmission. 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 review all SI Ls to obtain up-to-date information concerning Allison Transmission products.


Allison Transmission Allison

4th Generation Controls

3000 and 4000 Product Families

3000 EVS 3000 HS 3000 MH 3000 PTS 3000 RDS 3000 TRV 3200 SP * Not a current model 3200 TRV 3500 EVS 3500 RDS 3500 SP 3700 SP 4000 EVS 4000 HS 4000 MH 4000 RDS 4000 TRV 4500 EVS 4500 HS 4500 RDS 4500 SP 4500 TRV* 4700 EVS 4700 OFS 4700 RDS 4800 EVS B 300PR B 500 B SOOP B 500PR B 500R T 425 T 450


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