Mike's Workshop Manuals: Service manuals for every vehicle
Home >> GMC >> 2021 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 308 (Engine Heating System And Cooling System) >> Diagnostic Information and Procedures >> DTC P00B2 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2023 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On/Vehicle - In Service Mode
  2. Verify there are no DTCs set, except DTC P00B2, related to the following system/component: B203 Radiator Coolant Temperature Sensor
    • Go to next step: If a related DTC is not set 
  3. Verify there are no DTCs set related to the following component/system:
    • B9 Ambient Air Temperature Sensor
    • B34 Engine Coolant Temperature Sensor
    • B36 Engine Oil Temperature Sensor
    • B65 Intake Manifold Pressure and Air Temperature Sensor
    • Go to next step: If a related DTC is not set 
  4. Ignition/Vehicle - Off - For greater than 8 h
  5. Ignition - On/Vehicle - In Service Mode
  6. Verify the scan tool parameters listed below are within 15.8°C (28°F) of the following parameter: Start-Up Radiator Coolant Temperature Sensor
    • Start-Up ECT
    • Start-Up IAT
    • If the scan tool parameter is not within 15.8°C (28°F) of the other parameters 
    1. Ignition/Vehicle - Off
    2. Disconnect the electrical connector: B203 Radiator Coolant Temperature Sensor
    3. Disconnect the appropriate electrical connector: K20 Engine Control Module
    4. Test for less than 2 ohms between the test points: Low Reference circuit terminal 2/B@Component harness & The other end of the circuit@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 ohms
    5. Test for less than 2 ohms between the test points: Signal circuit terminal 1/A@Component harness & The other end of the circuit@Control module harness
      • If 2 ohms or greater - Repair the open/high resistance in the circuit.
      • Go to next step: If less than 2 ohms
    6. Test or replace the component: B203 Radiator Coolant Temperature Sensor
    • Go to next step: If the scan tool parameter is within 15.8°C (28°F) of the other parameters 
  7. 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 

      Repeat the procedure starting at step 1

    • Go to next step: If the DTC is not set 
  8. All OK.
scientia non olet · About Mike's Workshop Manuals