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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 1.4L (LUJ, LUV) - DTC P0010 To P0246 >> Diagnostic Information and Procedures >> DTC P0106: Manifold Absolute Pressure (MAP) Sensor >> Component Testing >> Erratic Signal Test

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 0-15 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 B74 Manifold Absolute Pressure Sensor.

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