Automatic Transmission Diagnostic Procedures

• Introduction
  • Notes
  • System Coverage
  • Six-Step Troubleshooting Procedure
• Identification Of System
• System Description And Functional Operation
  • General Description
  • Functional Operation
    • Notes
    • Transmission Operation And Shift Scheduling At Various Oil Temperatures
    • Line Pressure Control
    • Drive Learn Procedure
      • Procedure To Learn A Smooth 1st Neutral To Drive Shift
      • Procedure To Learn A Smooth Neutral To Drive Garage Shift
      • Procedure To Learn The 1st 2-3 Shift After A Restart Or Shift To Reverse
      • Procedure To Learn A Smooth 2-3 And 3-4 Upshift
      • Procedure To Learn A Smooth 4-3 Coastdown And Part Throttle 4-3 Kickdown
      • Procedure To Learn A Smooth 1-2 Upshift and 3-2 Kickdown
      • Procedure To Learn A Smooth Manual 2-1 Pulldown Shift As Well As A Neutral To Reverse Shift
      • Procedure To Learn A Smooth Neutral To Reverse Shift
      • Procedure To Learn A Smooth 4-5 Upshift for 545RFE
  • Diagnostic Trouble Codes
    • Notes
    • Hard Code
    • One Trip Failures
    • Intermittent Code
    • Starts Since Set Counter
    • Trouble Code Erasure
    • List Of Diagnostic Trouble Codes (Detailed Descriptions Follow List)
    • DTC Descriptions
    • EATX DTC Event Data
    • Quick Learn
    • Clutch Volumes
  • Using The DRBIII®
  • DRBIII® Error Messages
    • Notes
    • DRBIII® Does Not Power Up (Blank Screen)
    • Display Is Not Visible
    • Some Display Items Read "-"
  • Transmission Simulator (Miller Tool # 8333) And Electronic Transmission Adapter Kit (Miller Tool #8333-1A)
• Disclaimers, Safety, And Warnings
  • Disclaimers
  • Safety
    • Technician Safety Information
    • Vehicle Preparation For Testing
    • Servicing Sub-Assemblies
    • DRBIII® Safety Information
  • Warnings
    • Vehicle Damage Warnings
    • Road Testing A Complaint Vehicle
    • Electronic Pinion Factor Warnings (If Applicable)
    • Bulletins And Recalls
• Required Tools And Equipment
• Glossary Of Terms
  • Acronyms
  • Definitions
• Diagnostic Information And Procedures
  • Communication
    • Symptom: *NO RESPONSE FROM TRANSMISSION CONTROL MODULE - GAS ONLY
  • Transmission - RFE
    • Notes
    • P0122-TPS/Apps Low
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0123-TPS/Apps High
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0124-TPS/Apps Intermittent
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0218-High Temperature Operation Activated
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0604-Internal TCM
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0605-Internal TCM
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0613-Internal TCM
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0706-Check Shifter Signal
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0711-Transmission Temperature Sensor Performance
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0712-Transmission Temperature Sensor Low
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0713-Transmission Temperature Sensor High
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0714-Transmission Temperature Sensor Intermittent
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0715-Input Speed Sensor Error
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0720-Output Speed Sensor Error
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0725-Engine Speed Sensor Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0725-Engine Speed Sensor Circuit - Diesel
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0731-Gear Ratio Error In 1ST
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0732-Gear Ratio Error In 2ND
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0733-Gear Ratio Error In 3RD
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0734-Gear Ratio Error In 4TH
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0735-Gear Ratio Error 4TH Prime
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0736-Gear Ratio Error In Reverse
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0740-Torque Converter Clutch Control Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0750-LR Solenoid Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0755-2C Solenoid Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0760-Od Solenoid Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0765-UD Solenoid Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0770-4C Solenoid Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0841-LR Pressure Switch Sense Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0845-2C Hydraulic Pressure Test Failure
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0846-2C Pressure Switch Sense Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0868-Line Pressure Low
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0869-Line Pressure High
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0870-Od Hydraulic Pressure Test Failure
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0871-Od Pressure Switch Sense Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0875-UD Hydraulic Pressure Test Failure
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0876-UD Pressure Switch Sense Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0884-Power Up At Speed
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0888-Relay Output Always Off
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0890-Switched Battery
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0891-Transmission Relay Always On
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0932-Line Pressure Sensor Circuit Fault
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0934-Line Pressure Sensor Low
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0935-Line Pressure Sensor High
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0944-Loss Of Prime
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0987-4C Hydraulic Pressure Test Failure
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P0988-4C Pressure Switch Sense Circuit
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1684-Battery Was Disconnected
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1694-Bus Communication With Engine Module
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1715-Restricted Port In T3 Range
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1736-Gear Ratio Error In 2ND Prime
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1775-Solenoid Switch Valve Latched In TCC Position
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1776-Solenoid Switch Valve Latched In LR Position
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1790-Fault Immediately After Shift
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P1793-TRD Link Communication Error
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Test
    • P1794-Speed Sensor Ground Error
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2700-Inadequate Element Volume LR
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2701-Inadequate Element Volume 2C
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2702-Inadequate Element Volume Od
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2703-Inadequate Element Volume UD
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2704-Inadequate Element Volume 4C
      • When Monitored:
      • Set Condition:
      • Possible Causes:
      • Diagnostic Procedure
    • P2706-Ms Solenoid Circuit
      • Monitor Conditions
      • Set Conditions
      • possible causes
      • Diagnostic Procedure
    • Symptom: *BACKUP LAMPS COME ON WHILE SHIFTER IS NOT IN REVERSE POSITION
    • Symptom: *BACKUP LAMPS INOPERATIVE
    • Symptom: *BUMP FELT SHORTLY AFTER STOP WITH NO DTC'S PRESENT
    • Symptom: *BUMP FELT WHILE COASTING IN NEUTRAL WITH NO DTC'S PRESENT
    • Symptom: *CHECKING PARK/NEUTRAL SWITCH OPERATION
    • Symptom: *POOR SHIFT QUALITY
    • Symptom: *TRANSMISSION NOISY WITH NO DTC'S PRESENT
    • Symptom: *TRANSMISSION SHIFTS EARLY WITH NO DTC'S
    • Symptom: *TRANSMISSION SHIFTS ROUGH AFTER TCM REPLACEMENT OR REFLASH
    • Symptom: *TRANSMISSION SIMULATOR WILL NOT POWER UP
    • Symptom: *VEHICLE IS SLUGGISH WITH NO DTC'S PRESENT
  • Verification Tests
    • Verification Tests
• Component Locations
  • Crankshaft Position Sensor
  • Transmission Component Locations
  • Transmission Control Module
  • Transmission Line Pressure Sensor
• Connector Pin Outs
• Schematic Diagrams
  • Circuit Schematic
• Charts And Graphs
  • Pressure Switch States
  • Shift Lever Error Codes
  • Transmission Range Sensor Switch States