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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Engine Controls And Fuel - 1.6L (LWC) - DTC P0010 To DTC P0238) >> Diagnostic Information and Procedures >> DTC P0107 or P0108 >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

You must perform the Circuit/System Testing in order to verify the integrity of the MAP Sensor circuits before proceeding with the Component Testing.

Skewed Sensor Test

  1. Ignition OFF, remove the B65 Intake Manifold Pressure and Air Temperature Sensor from the engine. Connect the harness to the sensor, if disconnected.
  2. Ignition ON, apply 17 kPa (5.0 in Hg) of vacuum to the B65 Intake Manifold Pressure and Air Temperature Sensor, with the GE-23738-A  . Verify the scan tool MAP Sensor pressure parameter decreases between 13 - 21 kPa (1.8 - 3.0 PSI).
    • If the parameter does not decrease between 13 - 21 kPa (1.8 - 3.0 PSI). 

      Replace the B65 Intake Manifold Pressure and Air Temperature Sensor.

    • Go to next step: If the parameter does decrease between 13 - 21 kPa (1.8 - 3.0 PSI). 
  3. Apply 34 kPa (10.0 in Hg) of vacuum to the B65 Intake Manifold Pressure and Air Temperature Sensor, with the GE-23738-A  . Verify the scan tool MAP Sensor pressure parameter decreases between 30 - 38 kPa (4.4 - 5.5 PSI).
    • If the parameter does not decrease between 30 - 38 kPa (4.4 - 5.5 PSI). 

      Replace the B65 Intake Manifold Pressure and Air Temperature Sensor.

    • Go to next step: If the parameter does decrease between 30 - 38 kPa (4.4 - 5.5 PSI). 
  4. All OK.

Erratic Signal Test

  1. Ignition OFF, remove the B65 Intake Manifold Pressure and Air Temperature Sensor and disconnect the harness.
  2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 2 or C of the sensor and the sensor harness.
  3. Install a jumper wire between the low reference circuit terminal 3 or A of the sensor and ground.
  4. Install a jumper wire to the signal circuit terminal 4 or D of the sensor.
  5. Connect a DMM between the jumper wire and ground.
  6. Ignition ON, observe the DC voltage on the DMM. Slowly apply between 0-15 kPa (0 - 4.4 in Hg) of vacuum to the sensor with the GE-23738-A  . Verify the voltage changes, without any spikes or dropouts and is between 0.2 - 4.9 V.
    • If not between 0.2 - 4.9 V or has spikes or dropouts 

      Replace the B65 Intake Manifold Pressure and Air Temperature Sensor.

    • Go to next step: If between 0.2 - 4.9 V and there are no spikes or dropouts 
  7. All OK.
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