Allison 3000 and 4000 Troubleshooting Manual – 4th Generation Controls

Description

Allison 3000 and 4000 Troubleshooting Manual covering the 3000 and 4000 Product Families fitted with Allison 4th Generation electronic controls. This factory publication provides diagnostic and troubleshooting information for the listed vocational transmission models, including electronic control components, diagnostic codes, circuit checks, hydraulic diagnosis and transmission performance complaints.

Produced for professional transmission technicians, vehicle workshops and fleet maintenance departments, the manual explains the control system before setting out structured fault-finding procedures. It covers interaction between the transmission control module, shift selector, speed sensors, throttle input, electro-hydraulic control module, wiring harnesses and vehicle interface components.

This is a troubleshooting publication rather than a complete mechanical overhaul manual. Allison service manuals SM4013EN and SM4014EN and parts catalogues PC2150EN and PC2456EN are referenced by the publication for use alongside it where mechanical service or parts identification is required.

ELECTRONIC CONTROL SYSTEM

The manual describes the principal components and operating features of the Allison 4th Generation electronic control system. Confirmed subjects include:

• Transmission Control Module, or TCM
• Pushbutton and lever shift selectors
• Throttle position sensor and electronic throttle data
• Engine, turbine and output speed sensors
• Electro-hydraulic control module
• Internal and external wiring harnesses
• Vehicle Interface Module
• Autodetect and TransID features
• Optional retarder controls
• Oil level and temperature sensor inputs

DIAGNOSTIC CODES AND FAULT RESPONSES

A substantial part of the publication is devoted to electronic diagnosis. It explains how faults are recorded, displayed and cleared, together with the transmission system response to active conditions.

• Diagnostic code memory
• Code reading and clearing
• Diagnostic code responses
• Shift-selector displays for active codes
• Diagnostic code lists and descriptions
• Code-specific troubleshooting procedures
• Solenoid locations
• Diagnostic code schematics
• TCM diagnostic procedure
• Allison DOC diagnostic tool information

WIRING AND CONNECTOR TESTING

Electrical checks include procedures for identifying circuit defects in transmission control wiring. The information supports systematic testing instead of indiscriminate component replacement.

• Testing wiring for open circuits
• Testing for shorts between wires
• Testing for short circuits to ground
• Transmission feedthrough connector checks
• Internal harness circuit checks
• Wire and connector charts
• Connector and terminal part numbers
• Terminal and connector repair information
• Solenoid resistance charts
• Externally generated electronic interference

TESTING AND ADJUSTMENT

The Allison 3000 and 4000 Troubleshooting Manual includes supporting checks and adjustment information used when confirming electronic or hydraulic faults.

• Electronic fluid-level readings through the shift selector
• Fluid-level checks using Allison DOC for PC
• Throttle position sensor adjustment
• Clutch and retarder pressure measurement
• Solenoid and clutch application chart
• Input and output function checks
• Thermistor troubleshooting information
• SAE J1939 communication-link diagnosis
• Hydraulic operation during electrical interruption

TROUBLESHOOTING AND SCHEMATICS

The publication brings together electronic, electrical and hydraulic information required to trace control-system and performance complaints. It includes general performance troubleshooting as well as reference material for individual circuits and hydraulic functions.

• Structured troubleshooting process
• System overview and required basic knowledge
• Identification of potential circuit problems
• Hydraulic system diagnostic tree
• Hydraulic schematics
• 3000 and 4000 Product Families wiring schematic
• Input and output function references
• Performance complaint troubleshooting
• Welding precautions for the vehicle and interface module

ALLISON 3000 AND 4000 TROUBLESHOOTING MANUAL MODEL COVERAGE

3000 vocational models:

• 3000 HS, 3000 RDS, 3000 EVS, 3000 MH, 3000 PTS and 3000 TRV
• 3200 SP and 3200 TRV
• 3500 RDS, 3500 EVS and 3500 SP
• 3700 SP
• B 300(P)(R), B 400(P)(R), T 200 and T 300

4000 vocational models:

• 4000 EVS, 4000 HS, 4000 MH, 4000 RDS and 4000 TRV
• 4500 EVS, 4500 HS, 4500 RDS, 4500 SP and 4500 TRV
• 4700 EVS, 4700 RDS and 4700 OFS
• 4800 EVS
• B 500, B 500P, B 500R and B 500PR
• T 425 and T 450

MANUAL DETAILS

• Manufacturer: Allison Transmission, Inc.
• Manual type: Factory troubleshooting manual
• Control generation: Allison 4th Generation Controls
• Publication number: TS3989EN
• Edition: December 2005, Revision 1 March 2006, Revision 2 October 2006
• Copyright: 2007
• Language: English
• Pages: 747

This Allison 3000 and 4000 Troubleshooting Manual is particularly useful where a workshop must diagnose control-system faults, interpret transmission codes, test harness circuits or investigate hydraulic and performance complaints. Its schematics, charts and diagnostic procedures provide a factory reference for methodical transmission fault finding.

Model applicability should always be confirmed against the transmission identification and control generation before beginning diagnosis. Vehicle-manufacturer and body-builder safety information must also be observed where other vehicle systems interact with the Allison transmission.