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Troubleshooting Manual JustAnswer
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W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L. FOREWORD How to Use This Manual, This manual provides troubleshooting information for Allison Transmission Division MD HD B Series. Transmissions Service Manuals SM2148EN and SM2457EN and Parts Catalogs PC2150EN and PC2456EN may. be used in conjunction with this manual,This manual includes. Description of the WTEC II 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 letter suffix added to the publication number 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, NOTE Allison Transmission is providing for service of WTEC II wiring harnesses and wiring harness. components as follows See Service Information Letter 1 WT 97 for further information. Repair parts for the internal wiring harness and for wiring harness components attached to the shift selector. will be available through the Allison Transmission Parts Distribution Center PDC Use the P N from your. appropriate parts catalog or from Appendix E in this manual Allison Transmission is responsible for. warranty on these parts, Since January 1998 all WTEC II external harnesses and external harness components must be obtained. from St Clair Technologies Inc SCTI SCTI provides parts to any Allison customer or OEM and is. responsible for warranty on these parts SCTI recognizes ATD manufacturers and SCTI part numbers. SCTI provides a technical HELPLINE at 519 627 1673 Wallaceburg SCTI has parts catalogs available. The SCTI addresses and phone numbers for parts outlets are. St Clair Technologies Inc St Clair Technologies Inc St Clair Technologies Inc. 1050 Old Glass Road 1111 Mikesell Street c o Mequilas Tetakawi. Wallaceburg Ontario Canada N8A 3T2 Charlotte Michigan 48813 Carr Internationale KM 1969. Phone 519 627 1673 Phone 517 541 8166 Guadalajara Nogales KM2. Fax 519 627 4227 Fax 517 541 8167 Empalme Sonora Mexico. Phone 011 52 622 34661,Fax 011 52 622 34662,ii Copyright 1998 General Motors Corp. W T E C I I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L. IMPORTANT SAFETY NOTICE, IT IS YOUR RESPONSIBILITY to be completely familiar with the warnings and cautions. used in this manual These warnings and cautions advise against using specific service. procedures that can result in personal injury equipment damage or cause the equipment to. become unsafe These warnings and cautions are not exhaustive Allison Transmission could. not possibly know evaluate or advise the service trade of all conceivable procedures by which. service might be performed or of the possible hazardous consequences of each procedure. Consequently Allison Transmission has not undertaken any such broad evaluation. Accordingly ANYONE WHO USES A SERVICE PROCEDURE OR TOOL WHICH IS NOT. RECOMMENDED BY ALLISON TRANSMISSION MUST first be thoroughly satisfied. that neither personal safety nor equipment safety will be jeopardized by the service proce. dures used, Also be sure to review and observe WARNINGS CAUTIONS and NOTES provided by the.
vehicle manufacturer and or body builder before servicing the Allison transmission in that. Proper service and repair is important to the safe and reliable operation of the equipment The. service procedures recommended by Allison Transmission and described in this manual are. effective methods for performing troubleshooting operations Some procedures require using. specially designed tools Use special tools when and in the manner recommended. The WARNINGS CAUTIONS and NOTES in this manual apply only to the Allison transmission. and not to other vehicle systems which may interact with the transmission Be sure to review and. observe any vehicle system information provided by the vehicle manufacturer and or body builder. at all times the Allison transmission is being serviced. WARNINGS CAUTIONS AND NOTES, Three types of headings are used in this manual to attract your attention. Is used when an operating procedure practice etc which if not correctly followed. WARNING could result in injury or loss of life, Is used when an operating procedure practice etc which if not strictly observed could. CAUTION result in damage to or destruction of equipment. NOTE Is used when an operating procedure practice etc is essential to highlight. Copyright 1998 General Motors Corp iii, W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L. TRADEMARKS USED IN THIS MANUAL, The following trademarks are the property of the companies indicated. LPS Cleaner is a registered trademark of LPS Laboratories. VCI 10 is the registered trademark for a vapor phase rust preventive manufactured by Daubert Chemical. Company Chicago Illinois VCI 10 is covered by Military Specifications MIL L 46002 ORD and. MIL I 23310 WEP under the designation of Nucle Oil. Biobor JF is the registered trademark for a biological inhibitor manufactured by Hammonds Fuel Additives. Corporation, Loctite is a registered trademark of the Loctite Corporation.
Teflon is a registered trademark of the DuPont Corporation. Pro Link is a registered trademark of MicroProcessor Systems Inc. SHIFT SELECTOR TERMS AND DISPLAY INDICATIONS, Shift selector terms and displays are represented in this manual as follows. Button Names DISPLAY MODE MONITOR SELECT etc, Transmission Ranges D Drive N Neutral 1 First R Reverse etc. Displays OL OK etc,iv Copyright 1998 General Motors Corp. WTEC I I EII,WTEC L EELECTRONIC,C T RO N I C CCONTROLS. O N T RO L S TROUBLESHOOTING,T RO U B L E S H O OT I NMANUAL.
G M A N UA L,TABLE OF CONTENTS,Foreword i,SAFETY INFORMATION. Important Safety Notice iii,Warnings Cautions and Notes iii. Trademarks Used in This Manual iv,Shift Selector Terms and Display Indications iv. SECTION 1 GENERAL DESCRIPTION,1 1 TRANSMISSION 1 1. 1 2 ELECTRONIC CONTROL UNIT ECU 1 3,1 3 SHIFT SELECTOR 1 3.
A Pushbutton Shift Selector 1 3,B Lever Shift Selector 1 4. 1 4 THROTTLE POSITION SENSOR 1 4,1 5 SPEED SENSORS 1 5. 1 6 CONTROL MODULE 1 6,1 7 WIRING HARNESSES 1 7,A External Wiring Harness 1 7. B Internal Wiring Harness 1 8,1 8 VEHICLE INTERFACE MODULE 1 10. 1 9 TRANSID FEATURE 1 10,SECTION 2 DEFINITIONS AND ABBREVIATIONS.
2 1 DO NOT SHIFT LIGHT 2 1,2 2 DIAGNOSTIC DATA READER 2 1. 2 3 ABBREVIATIONS 2 2,SECTION 3 BASIC KNOWLEDGE,3 1 BASIC KNOWLEDGE REQUIRED 3 1. 3 2 USING THE TROUBLESHOOTING MANUAL 3 1,3 3 SYSTEM OVERVIEW 3 2. 3 4 IMPORTANT INFORMATION IN THE TROUBLESHOOTING PROCESS 3 2. 3 5 BEGINNING THE TROUBLESHOOTING PROCESS 3 3,SECTION 4 WIRE CHECK PROCEDURES. 4 1 CHECKING OPENS SHORTS BETWEEN WIRES,AND SHORTS TO GROUND 4 1.
4 2 CHECKING AT TRANSMISSION CONNECTOR AND THE INTERNAL HARNESS. FOR OPENS SHORTS BETWEEN WIRES AND SHORTS TO GROUND 4 2. Copyright 1998 General Motors Corp v,WTEC I I EII,WTEC L EELECTRONIC. C T RO N I C CCONTROLS,O N T RO L S TROUBLESHOOTING. T RO U B L E S H O OT I NMANUAL,G M A N UA L,T A B L E O F C O N T E N T S C o n t d. SECTION 5 OIL LEVEL SENSOR Page, 5 1 ELECTRONIC FLUID LEVEL CHECK SHIFT SELECTOR 5 1. A Fluid Level Check Procedure 5 1, 5 2 ELECTRONIC FLUID LEVEL CHECK PRO LINK 9000 5 4.
A Fluid Level Check Procedure 5 4,SECTION 6 DIAGNOSTIC CODES. 6 1 DIAGNOSTIC CODE MEMORY 6 1,6 2 CODE READING AND CODE CLEARING 6 1. 6 3 DIAGNOSTIC CODE RESPONSE 6 3, 6 4 SHIFT SELECTOR DISPLAYS RELATED TO ACTIVE CODES 6 3. 6 5 DIAGNOSTIC CODE LIST AND DESCRIPTION 6 4,6 6 DIAGNOSTIC CODE TROUBLESHOOTING 6 17. A Beginning the Troubleshooting Process 6 17,B Solenoid Locations 6 17.
C Diagnostic Code Schematics 6 18,D Diagnostic Code 13 and 35 Schematics 6 18. SECTION 7 INPUT AND OUTPUT FUNCTIONS,7 1 INPUT FUNCTIONS 7 1. 7 2 OUTPUT FUNCTIONS 7 3, SECTION 8 GENERAL TROUBLESHOOTING OF PERFORMANCE COMPLAINTS. 8 1 GENERAL NOTES 8 1,8 2 TROUBLESHOOTING PERFORMANCE COMPLAINTS 8 2. APPENDICES, A IDENTIFICATION OF POTENTIAL CIRCUIT PROBLEMS A 1.
B CHECKING CLUTCH PRESSURES B 1,C SOLENOID AND CLUTCH CHART C 1. D WIRE CONNECTOR CHART D 1,E CONNECTOR PART NUMBERS TERMINAL PART NUMBERS. TOOL PART NUMBERS AND REPAIR INSTRUCTIONS E 1,F THROTTLE POSITION SENSOR ADJUSTMENT F 1. G MISCELLANEOUS ITEMS G 1,H HYDRAULIC SCHEMATICS H 1. J WT WIRING SCHEMATICS J 1,K SOLENOID AND TEMPERATURE CHARTS K 1.
L EXTERNALLY GENERATED ELECTRONIC INTERFERENCE L 1. M DIAGNOSTIC TREE WT SERIES HYDRAULIC SYSTEM M 1, N PRO LINK 9000 DIAGNOSTIC DATA READER INFORMATION N 1. P INPUT OUTPUT FUNCTION WIRING SCHEMATICS P 1,vi Copyright 1998 General Motors Corp. W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L. SECTION 1 GENERAL DESCRIPTION,1 1 TRANSMISSION, The World Transmission Electronic Controls WTEC II system features closed loop clutch control to provide. superior shift quality over a wide range of operating conditions MD 3000 except 3070 HD 4000 and B Series. configurations can be programmed to have up to six forward ranges neutral and one reverse range The MD 3070. has seven forward ranges and one reverse range Figures 1 1 and 1 2 show electronic control unit components. WTEC II Electronic Controls consist of the following components. Basic or Max Feature Electronic Control Unit ECU, Pushbutton or Lever Shift Selectors remote or integral to the ECU. Optional Secondary Shift Selector,Engine Turbine and Output Speed Sensors.
Throttle Position Sensor TPS or electronic engine throttle signal or PWM signal. Control Module Electro Hydraulic Valve Body,Wiring Harnesses. Vehicle Interface Module VIM,Optional Retarder Controls. TransID Feature, NOTE Model Year 94 and earlier WT Series Electronic Controls operate on 12VDC Vehicles with a 24VDC. system require a voltage equalizer or converter to supply 12V to the electronic control system Model. Year 95 and later transmissions operating on 24VDC require a 24V VIM and a 24V wiring harness. which includes shielding for the turbine and output speed sensors. INTEGRAL ECU,SHIFT SELECTORS,MD B 300 B 400 REMOTE. RETARDER CONNECTOR ECU,INCLUDES OUTPUT,SPEED SENSOR ELECTRONIC.
VEHICLE RETARDER CONTROL,MD 3070 INTERFACE MODULATION UNIT. TRANSFER CASE MODULE REQUEST RMR ECU,CONNECTOR VIM SENSOR CONNECTOR CONNECTORS. DIAGNOSTIC,VEHICLE DATA READER DDR,INTERFACE CONNECTOR. HD B 500 WIRING,RETARDER VIW PRO LINK,TEMPERATURE CONNECTOR DIAGNOSTIC TOOL. SENSOR J 38538 A,CONNECTOR OPTIONAL,BULKHEAD OPTIONAL x.
DEUTSCH DDR,HD MD B RETARDER CONNECTOR 7,ACCUMULATOR H CONNECTOR 1. OUTPUT SPEED REMOTE SERIAL,TRANSMISSION CONNECTOR,WIRING INTERFACE. CONNECTOR HARNESS,TPS LEVER SHIFT,CONNECTOR SELECTOR. ENGINE REMOTE,SPEED PUSHBUTTON SHIFT,SENSOR SELECTOR. CONNECTOR SENSOR,RETARDER K CONNECTOR,CONNECTOR THROTTLE STRIP PUSHBUTTON.
NOTE Illustration is not to scale HD B 500 SHIFT SELECTOR. All HD B 500 models SENSOR,All Non Retarder MD B 300 B 400 models V01634. Figure 1 1 WTEC II Electronic Control Components Units Produced Before 9 94. Copyright 1998 General Motors Corp 1 1, W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L. GENERAL DESCRIPTION,INTEGRAL ECU,SHIFT SELECTORS,MD B 300 B 400 REMOTE. RETARDER CONNECTOR ECU,INCLUDES OUTPUT,SPEED SENSOR ELECTRONIC. VEHICLE RETARDER CONTROL,MD 3070 INTERFACE MODULATION UNIT.
TRANSFER CASE MODULE REQUEST RMR ECU,CONNECTOR VIM SENSOR CONNECTOR CONNECTORS. VEHICLE DIAGNOSTIC,INTERFACE DATA READER DDR,HD B 500 WIRING CONNECTOR. RETARDER VIW PRO LINK,TEMPERATURE CONNECTOR DIAGNOSTIC TOOL. SENSOR J 38538 A,CONNECTOR OPTIONAL,BULKHEAD OPTIONAL x. DEUTSCH DDR,HD MD B RETARDER CONNECTOR 7,ACCUMULATOR H CONNECTOR 1.
OUTPUT SPEED REMOTE SERIAL,TRANSMISSION CONNECTOR,WIRING INTERFACE. CONNECTOR HARNESS,TPS LEVER SHIFT,CONNECTOR SELECTOR. ENGINE TURBINE,PUSHBUTTON SHIFT,SPEED SPEED SELECTOR. SENSOR SENSOR,RETARDER K CONNECTOR,CONNECTOR CONNECTOR HD B 500 STRIP PUSHBUTTON. THROTTLE SHIFT SELECTOR, NOTE Illustration is not to scale HD B 500 POSITION.
All HD B 500 models SENSOR,All Non Retarder MD B 300 B 400 models V01587. Figure 1 2 WT Electronic Control Unit Components Units Produced 9 94 12 97. This manual provides troubleshooting information for Allison Transmission Division MD HD B Series Transmissions Service Manuals SM2148EN and SM2457EN and Parts Catalogs PC2150EN and PC2456EN may be used in conjunction with this manual This manual includes Description of the WTEC II electronic control system Description of the electronic control system components Description

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