4L60E/65E/70E- 4L80E/85E DIAGNOSTIC CODE BOOK INTRODUCTION The GM 4L60E/65E/70E-4L80E/85E Diagnostic Code Book is designed to provide the technician with a step by step diagnostic approach to each and every transmission code available from 1991 to the 2007 model year. This manual can be used in collusion with any type of scanner utilized in retrieving these codes from the computer. As an aid to the technician, component location is recognized throughout the manual. Complete diagnostics are included as well as a wealth of tips and tricks discovered over the years by the ATSG tech team. This manual was compiled with the professional technician in mind, therefore a basic electrical knowledge is necessary, especially when it comes to vehicles equipped with a hybrid system. A special thanks to all the technicians who offered feedback on fixes that helped in the compilation of this manual. Portions of materials contained herein have been reprinted under license from General Motors Corp, Service & Operations License Agreement Number 0510718. The information and part numbers contained in this booklet have been carefully compiled from industry sources known for their reliability, bur ATSG does not guarantee its accuracy. Information Compiled by Pete Luban Copyright © ATSG 2007 JIM DIAL WAYNE COLONNA TECHNICAL CONSULTANT TECHNICAL CONSULTANT JERRY GOTT PETE LUBAN TECHNICAL CONSULTANT TECHNICAL CONSULTANT DAVID CHALKER GERALD CAMPBELL TECHNICAL CONSULTANT TECHNICAL CONSULTANT ED KRUSE JON GLATSTEIN TECHNICAL CONSULTANT TECHNICAL CONSULTANT GREGORY LIPNICK ROLAND ALVAREZ TECHNICAL CONSULTANT TECHNICAL CONSULTANT MIKE SOUZA RICHARD GRAHAM TECHNICAL CONSULTANT TECHNICAL CONSULTANT AUTOMATIC TRANSMISSION SERVICE GROUP 18635 SW 107 Ave. MIAMI, FL 33157 Telephone (305) 670-4161 - Fax (305) 670-4162 - www.atsg.biz 1 Technical Service Information 4L60E/65E/70 E - 4L80E/85E CODE BOOK INDEX Preliminary Electrical Checks......................................................................................................................... 3 Vehicle Identification....................................................................................................................................... 5 Scan Tips.......................................................................................................................................................... 7 Data Link Connector Terminal Identification.................................................................................................. 10 OBD-I Codes & Definitions............................................................................................................................ 11 OBD-II Codes & Definitions........................................................................................................................... 13 Code Criteria.................................................................................................................................................... 17 Computer Locations......................................................................................................................................... 18 Computer Connector Configurations............................................................................................................... 19 Engine RPM Sensor - Loss of Signal.............................................................................................................. 26 Engine Coolant Temperature Sensor................................................................................................................ 31 Transmission Input Speed Sensor.................................................................................................................... 36 Loss of Vehicle Speed Signal (2 Wheel Drive)............................................................................................... 40 Loss of Vehicle Speed Signal (4 Wheel Drive)............................................................................................... 49 Four Wheel Drive Low Electrical Circuit Fault.............................................................................................. 54 Throttle Position Sensor................................................................................................................................... 56 Accelerator Pedal Position Sensor (Diesel)..................................................................................................... 59 Malfunction Indicator/Service Throttle Soon Lamp Circuit Fault.................................................................. 64 Throttle Actuator Control (Gasoline)............................................................................................................... 66 Transmission Fluid Pressure Switch Fault....................................................................................................... 78 Transmission Range Switch Error................................................................................................................... 83 Transmission Fluid Temp Sensor Fault........................................................................................................... 87 Torque Convertor Stator Temperature Switch Fault........................................................................................ 92 Brake Switch Circuit Malfunction................................................................................................................... 95 Torque Converter Clutch “Stuck Off”............................................................................................................. 97 Torque Converter Clutch “Stuck On”.............................................................................................................. 101 TCC Enable Solenoid Electrical Circuit Fault................................................................................................. 106 Pressure Control Solenoid Electrical Circuit Fault.......................................................................................... 108 TCC PWM Solenoid Electrical Circuit Fault.................................................................................................. 112 3-2 Solenoid Electrical Circuit Fault............................................................................................................... 116 1-2/2-3 Shift Solenoids Electrical Circuit Fault.............................................................................................. 119 1-2/2-3 Shift Solenoids Performance Malfunction.......................................................................................... 125 Undefined Gear Ratio/Incorrect Gear Ratio.................................................................................................... 131 Transmission Component Slipping.................................................................................................................. 138 Maximum Shift Adapt Exceeded..................................................................................................................... 145 Top Dead Center Offset Error.......................................................................................................................... 150 System Voltage Malfunctions.......................................................................................................................... 153 PCM/TCM Control Module Faults.................................................................................................................. 160 Traction Control Circuit Active....................................................................................................................... 162 Transmission Preference Switch (Tow/Haul) Circuit Input Low..................................................................... 163 Auxiliary Transmission Fluid Pump Relay Circuit Fault................................................................................ 165 Shift Stabilization............................................................................................................................................ 170 Second Gear Start Switch................................................................................................................................ 171 Performance Mode Switch.............................................................................................................................. 174 Cruise Control Input........................................................................................................................................ 176 “U” Codes Definitions..................................................................................................................................... 178 Diagnostic Tips................................................................................................................................................ 181 Acronyms/Diagnostic Equipment Manufactures/Electrical Values................................................................. 182 Electrical Equations......................................................................................................................................... 184 2 AUTOMATIC TRANSMISSION SERVICE GROUP Technical Service Information PRELIMINARY ELECTRICAL CHECKS STEP 1 STEP 3 When diagnosing an electrically generated problem, the Next, charging system voltage should be verified to diagnostic procedure should always begin with verifying manufacturers specs to insure proper alternator output the vehicles