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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Engine Controls And Fuel - 1.4L (LUJ LUV) - DTC P0010 To DTC P0246) >> Diagnostic Information and Procedures >> DTC P0107 or P0108: Manifold Absolute Pressure (MAP) Sensor >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2015 Chevrolet Trax and 2015 Buick Encore. 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 Check the integrity of the MAP sensor circuits before proceeding with the Component Testing.

Skewed Sensor Test

  1. Ignition OFF, remove the B74 Manifold Absolute Pressure sensor from the engine. Connect the harness to the sensor, if disconnected.
  2. Ignition ON, apply 17 kPa (5.0 inHg) of vacuum to the B74 Manifold Absolute Pressure sensor, with the GE-23738-A  Vacuum Pump . Verify the scan tool MAP pressure parameter decreases between 13 and 21 kPa (1.8 and 3.0 PSI).
    • If the parameter does not decrease between 13 and 21 kPa (1.8 and 3.0 PSI). 

      Replace the B74 Manifold Absolute Pressure sensor.

    • If the parameter does decrease between 13 and 21 kPa (1.8 and 3.0 PSI). 
  3. Apply 34 kPa (10.0 inHg) of vacuum to the B74 Manifold Absolute Pressure sensor, with the GE-23738-A  Vacuum Pump . Verify the scan tool MAP pressure parameter 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 B74 Manifold Absolute Pressure sensor.

    • If the parameter does decrease between 30 and 38 kPa (4.4 and 5.5 PSI). 
  4. All OK.

Erratic Signal Test

  1. Ignition OFF, remove the B74 Manifold Absolute Pressure sensor and disconnect the harness.
  2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 of the sensor and the sensor harness.
  3. Install a jumper wire between the low reference circuit terminal 2 of the sensor and ground.
  4. Install a jumper wire to the signal circuit terminal 3 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 and 15kPa of vacuum to the sensor with the GE-23738-A  Vacuum Pump. Verify the voltage changes, without any spikes or dropouts, between 0.2 and 4.9 V.
    • If not between 0.2 and 4.9 V or has spikes or dropouts 

      Replace the B74 Manifold Absolute Pressure sensor.

    • If between 0.2 and 4.9 V and there are no spikes or dropouts 
  7. All OK.
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