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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 P0707, P0708, P2802, P2803, or P2805 >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P2805 is not set.
    • If the DTC is set 

      Replace the component: B303 Transmission Range Sensor

    • Go to next step: If the DTC is not set 
  3. Verify DTC P0641, P0651, P0697, P06A3 is not set.
    • Go to next step: If no DTC is set 
  4. Verify the condition does not exist: Incorrect adjustment - Refer to Range Selector Lever Cable Adjustment
    • If a condition exists 

      Repair or replace as necessary

    • Go to next step: If no condition exists 
  5. Operate the component: S3 Transmission Shift Lever - Select each position

    Verify the scan tool parameter: Transmission Range Sensor 1, 2 = The value should be within the range listed in the table: Transmission Range Sensor Duty Cycles

    • If not in the specified range 

      Refer to: Circuit/System Testing

    • Go to next step: If in the specified range 
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

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