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Home >> Pontiac >> 2007 >> Vibe Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - DTC P0010 To DTC P0128 >> DTC P0103 >> Test Description
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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 1:  The Diagnostic System Check - Vehicle prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool, if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
  2. 2:  This step checks for a high input signal from the MAF sensor.
DTC P0103

Step Action Values Yes No
Schematic Reference: Engine Controls Schematics
Connector End View Reference: Powertrain Control Module Connector End Views or Engine Controls Connector End Views
1  Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2  Select the MAF sensor parameter on the scan tool.
Is the MAF sensor value more than or equal to the specified value?		 185 g/s Go to Step 4  Go to Step 3 
3
  1. Clear the DTC Information with the scan tool.
  2. Operate the vehicle within the Freeze Frame conditions as specified.
Does a DTC P0103 set?		 - Go to Step 4  Go to Intermittent Conditions
4
  1. Turn OFF the ignition.
  2. Disconnect the mass air flow (MAF) sensor electrical connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Connect a test lamp from B+ to the MAF signal low circuit.
Does the test lamp illuminate?		 - Go to Step 5  Go to Step 6 
5 Measure the voltage of the MAF signal high circuit at the MAF sensor connector with a DMM connected to ground.
Is the MAF signal high circuit voltage more than the specified value?		 0.2 V Go to Step 7  Go to Step 9 
6
  1. Test for an open in the MAF sensor signal low circuit.
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 12  Go to Step 8 
7
  1. Test for a short to voltage in the MAF signal high circuit.
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 12  Go to Step 11 
8
  1. Test for an intermittent or a poor electrical connection at the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 12  Go to Step 11 
9
  1. Test for an intermittent or a poor electrical connection at the MAF sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
  2. Repair as necessary. Refer to Wiring Repairs .
Did you find and correct a condition?		 - Go to Step 12  Go to Step 10 
10 Replace the MAF sensor. Refer to Mass Airflow Sensor Replacement .
Did you complete the replacement?		 - Go to Step 12  -
11 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?		 - Go to Step 12  -
12
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC run and pass?		 - Go to Step 13  Go to Step 2 
13 With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
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