LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 2.0L (LSY) - Diagnostic Information And Procedures (1 Of 2)) >> Diagnostic Information and Procedures >> DTC P0236, P0237, or P0238 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.

Dynamic Test - Using Vehicle Harness

    NOTE:

    Circuit/System Testing must be performed before proceeding with Component Testing.

  1. Ignition/Vehicle - Off
  2. Remove the component: B111 Turbocharger Boost Sensor - Leave the electrical connector connected.
  3. Install EN-23738-A Vacuum Pump @ B111 Turbocharger Boost Sensor
  4. Use the tool to achieve a gauge reading between -13 and -21 kPa (-0.13 and -0.21 bar, -3.8 and -6.2 in Hg).

    Verify the scan tool parameter: Boost Pressure Sensor = Decreases between 13 and 21 kPa (1.9 and 3.0 PSI)

    • If the parameter does not decrease between 13 and 21 kPa (1.9 and 3.0 PSI) 

      Replace the component: B111 Turbocharger Boost Sensor

    • Go to next step: If the parameter decreases between 13 and 21 kPa (1.9 and 3.0 PSI) 
  5. Use the tool to achieve a gauge reading between -30 and -38 kPa (-0.3 and -0.38 bar, -8.8 and -11.2 in Hg).

    Verify the scan tool parameter: Boost Pressure Sensor = Decreases between 30 and 38 kPa (4.4 and 5.5 PSI)

    • If the parameter does not decrease between 30 and 38 kPa (4.4 and 5.5 PSI) 

      Replace the component: B111 Turbocharger Boost Sensor

    • Go to next step: If the parameter decreases between 30 and 38 kPa (4.4 and 5.5 PSI) 
  6. All OK.

Dynamic Test - Using Jumper Wires

  1. Ignition/Vehicle - Off
  2. Remove the component: B111 Turbocharger Boost Sensor
  3. Connect a 3 A fused jumper wire between the test points: 5 V Reference terminal 1 & 5 V
  4. Connect a jumper wire between the test points: Low Reference terminal 2 & Ground
  5. Connect a DMM between the test points: Signal terminal 3 @ B111 Turbocharger Boost Sensor & Ground
  6. Install EN-23738-A Vacuum Pump @ B111 Turbocharger Boost Sensor
  7. Use the tool to achieve a gauge reading between 0 and -15 kPa (0 and -0.15 bar, 0 and -4.4 in Hg).

    Verify the DMM displays between 0.2 and 4.9 V. - The value should not spike or drop out.

    • If not between 0.2 and 4.9 V or has spikes or drops out 

      Replace the component: B111 Turbocharger Boost Sensor

    • Go to next step: If between 0.2 and 4.9 V and there are no spikes or drops out 
  8. All OK.