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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P00B3 or P00B4 >> 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. Ignition/Vehicle - Off
  2. Disconnect the electrical connector:B203 Radiator Coolant Temperature Sensor
  3. Test for 42 to 78, 834 ohms between the test points:Signal terminal 1 & Low Reference terminal 2
    • If not between 42 and 78, 834 ohms 

      Replace the component:B203 Radiator Coolant Temperature Sensor

    • Go to next step: If between 42 and 78, 834 ohms 
  4. Verify the value is within the range listed in the table:Temperature Versus Resistance 
    • If not in the specified range 

      Replace the component:B203 Radiator Coolant Temperature Sensor

    • Go to next step: If in the specified range 
  5. Test for infinite resistance between the test points:Each terminal of the component & The component's housing
    • If less than infinite resistance 

      Replace the component:B203 Radiator Coolant Temperature Sensor

    • Go to next step: If infinite resistance 
  6. All OK.
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