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Home >> GMC >> 2011 >> Terrain SLT, 2.4 C, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 2.4L - DTC P0010 Through P025A >> DTC P0107 or P0108 >> Component Testing
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Component Testing

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.

Erratic Signal Test

  1. Ignition OFF, remove the B74 MAP sensor.
  2. Install a 3 A fused jumper wire between the 5 V reference circuit terminal 1 and the corresponding terminal of the B74 MAP sensor.
  3. Install a jumper wire between the low reference circuit terminal 2 of the B74 MAP sensor and ground.
  4. Install a jumper wire at terminal 3 of the B74 MAP sensor.
  5. Connect a DMM between the jumper wire from terminal 3 of the B74 MAP sensor and ground.
  6. Ignition ON, with the J 23738-A:  Mityvac or the J 35555:  Metal Mityvac, slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5 V without any spikes or dropouts.
    • If the voltage reading is erratic, replace the B74 MAP sensor.
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