LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Automatic Transmission Cooling System) >> Diagnostic Information and Procedures >> Transmission Overheats (5ET50) >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Fluid Leak Diagnosis .
  2. Verify airflow through the radiator is not obstructed. Refer to Radiator Cleaning .
  3. Perform the Transmission Fluid Level and Condition Check procedure.
  4. Perform the Line Pressure Check procedure.
  5. Perform the Automatic Transmission Fluid Pump Pressure High or Low procedure.
  6. Perform the Transmission Fluid Cooler Flow Test and Flushing (5ET50) .
  7. With a hand held or infra red thermometer or DT-24731  tempil stick, test for the transmission cooler supply line thermal bypass valve assembly opening at 96°C (205°F). The transmission cooler supply line temperature should be higher on the transmission side of the thermal bypass valve assembly than the cooler side until 96°C (205°F) is reached.
    • If the thermal bypass valve tests stuck closed 

      Replace the thermal bypass valve assembly.

    • If the thermal bypass valve tests normal 

      Inspect the transmission oil passages for a blockage.

    • If passages are blocked 

      Repair as necessary.

    • Go to next step: If passages are not blocked 
  8. All OK
scientia non olet · About LEMON Manuals