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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 367 (Engine Controls Self-Diagnostics - 3.1L Engine) >> Diagnostic Tests >> DTC P0102: MAF Sensor Circuit - Low Frequency (Century & Grand PRIX) >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

  1. 5  - This step will determine if any mechanical faults have caused this DTC to set.
  2. 7  - This voltage drop test will determine if high resistance has caused this DTC to set.
  3. 9  - This step verifies the voltage signal from the PCM to the MAF sensor connector.
  4. 10  - This step tests the signal circuit of the MAF sensor for a short to another 5-volt reference circuit.
  5. 11  - This step will determine if the PCM is able to process the frequency signal that it receives from the MAF sensor.
  6. 14  - This step will determine which portion of the circuit or which component is shorted to ground.
  7. 17  - This step verifies that the signal circuit is not shorted to any other PCM circuit.
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