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Home >> Chevrolet >> 2021 >> Blazer L >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 9T50 (M3D), 9T60 (M3T) Or 9T65 (M3V) - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0601-P0604, P0606, P062F, P16F3, or P16FB >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0602 is not set.
    • If the DTC is set 
    1. Perform all necessary programming and setup procedures for the control module: K71 Transmission Control Module
    2. Verify the DTC does not set.
      • If the DTC sets - Replace the component: K71 Transmission Control Module
      • Go to next step: If the DTC does not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. Ignition/Vehicle & All vehicle systems - Off
  4. Disconnect the electrical connector: K71 Transmission Control Module
  5. Verify a condition does not exist with the component: K71 Transmission Control Module @ Wiring Harness Connector - Defective/Loose/Poor Connection/Visible Damage
    • If a condition exists 

      Repair or replace as necessary

    • Go to next step: If no condition exists 
  6. Connect the electrical connector: K71 Transmission Control Module
  7. Ignition - On / Vehicle - In Service Mode
  8. Clear the DTCs.
  9. Ignition/Vehicle & All vehicle systems - Off
  10. Ignition - On / Vehicle - In Service Mode
  11. Verify DTC P0601, P0603, P0604, P0606, P062F, P16F3, P16FB is not set.
    • If the DTC is set 

      Replace the component: K71 Transmission Control Module

    • Go to next step: If the DTC is not set 
  12. All OK.
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