The GM  4L60E / 4L65E / 4L70E - 4L80E / 4L85E Diagnostic Code Book is designed to provide the technician with a step by step diagnosis to each and every transmission code available from 1991 to 2007 model years.

Contents:

• Preliminary Electrical Checks
• Vehicle Identification
• Scan Tips
• Data Link Connector Terminal Identification
• OBD-I Codes & Definitions
• OBD-II Codes & Definitions
• Code Criteria
• Computer Locations
• Computer Connector Configurations
• Engine RPM Sensor - Loss of Signal
• Engine Coolant Temperature Sensor
• Transmission Input Speed Sensor
• Loss of Vehicle Speed Signal (2 and 4 Wheel Drive)
• Four Wheel Drive Low Electrical Circuit Fault
• Throttle Position Sensor
• Accelerator Pedal Position Sensor (Diesel)
• Malfunction Indicator / Service Throttle Soon Lamp Circuit Fault
• Throttle Actuator Control (Gasoline)
• Transmission Fluid Pressure Switch Fault
• Transmission Range Switch Error
• Transmission Fluid Temp Sensor Fault
• Torque Converter Stator Temperature Switch Fault
• Brake Switch Circuit Malfunction
• Torque Converter Clutch - "Stuck on" / "Stuck off"
• TCC Enable Solenoid Electrical Circuit Fault
• Pressure Control Solenoid Electrical Circuit Fault
• TCC PWM Solenoid Electrical Circuit Fault
• 3-2 Solenoid Electrical Circuit Fault
• 1-2 / 2-3 Shift Solenoids Electrical Circuit Fault / Performance Malfunction
• Undefined Gear Ratio / Incorrect Gear Ratio
• Transmission Component Slipping
• Maximum Shift Adapt Exceeded
• Top Dead Center Offset Error
• System Voltage Malfunctions
• PCM / TCM Control Module Faults
• Traction Control Circuit Active
• Transmission Preference Switch (Tow / Haul) Circuit Input Low
• Auxiliary Transmission Fluid Pump Relay Circuit Faults
• Shift Stabilization
• Second Gear Start Switch
• Performance Mode Switch
• Cruise Control Input
• "U" Codes Definitions
• Diagnostic Tips
• Acronyms / Diagnostic Equipment Manufacturers / Electrical Values
• Electrical Equations