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Home >> Pontiac >> 2006 >> Vibe Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Engine Control System - 1.8L (LNK) - Troubleshooting & Diagnosis) >> Inspection/Maintenance (I/M) Heated Oxygen Sensor (HO2S) Heater System Set Procedure >> Diagnostic Aids >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

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

  1. 1:  Make sure you perform the I/M System Check before performing this test. Failure to do so may result in difficulty updating the status to YES.
  2. 2:  Preprogramming the scan tool will reduce the amount of time the oxygen sensor heaters operate while verifying the enable criteria. The HO2S Heater Tests may not complete when initiated from a cold start and may require running under a load in order to complete the tests.
  3. 3:  This step is to identify a first failure of a type B DTC. A DTC only appears on the I/M System Status display when the DTC becomes a MIL illuminating DTC. This occurs on the second failure of a type B DTC. A first failure of a type B DTC will not allow the I/M System Status to update to YES. Refer to Diagnostic Aids .
  4. 4:  This step is to help identify any unique or unusual criteria required to run the diagnostic test in the event the universal set procedure does not. This information is located in the service information under Conditions for Running the DTC.
  5. 5:  The I/M System Status only reports on whether or not a diagnostic has run, not what the outcome of the test was. If any emission related DTC sets after the tests are complete, the DTC will require diagnosis.
Inspection/Maintenance (I/M) Heated Oxygen Sensor (HO2S) Heater System Set Procedure

Step Action Value(s) Yes No
1  Did you perform the Inspection/Maintenance (I/M) System Check? - Go to Step 2  Go to Inspection/Maintenance (I/M) System Check 
2 
    IMPORTANT: Once the engine is started, DO NOT turn OFF the engine for the remainder of the procedure until the test is complete.
  1. Start and idle the engine.
  2. Ensure the vehicle is within the Conditions for Running specified in the supporting text.
  3. Set the vehicle parking brake.
  4. Verify the transmission is in Park for automatic transmissions and Neutral for manual transmissions.
  5. Turn OFF all of the accessories, e.g., A/C, blower fan, etc.
  6. Start and idle the engine.
  7. Idle the engine until the engine reaches operating temperature of at least 70°C (158°F). This may be up to 8-10 minutes depending on the start up coolant temperature.
    8. CAUTION: Refer to ROAD TEST CAUTION in Cautions and Notices.
    IMPORTANT: In order for the remaining portion of this test to run, the vehicle must operate in the following conditions:
  8. Acceleration at part throttle to 48-80 km/h (30-50 mph).
  9. Speed maintained for 2 minutes or until the I/M System Status indicator updates to YES
Did the HO2S Heater System Status update to YES?		 2 minutes Go to Step 5  Go to Step 3 
3  With a scan tool, observe the DTC information.
Does the scan tool indicate any failed DTCs?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information Go to Step 4 
4 
  1. Refer to Inspection/Maintenance (I/M) System DTC Table  to determine which DTCs are required to run in order to complete this test.
  2. Operate the vehicle within the Conditions for Running the DTC, located in the supporting text for the diagnostic table of the DTC.
  3. Repeat the procedure until the scan tool indicates the diagnostic test has run.
  4. With a scan tool, observe the I/M System Status display.
Did the HO2S Heater System Status update to YES?		 - Go to Step 5  Go to Diagnostic Aids
5  With a scan tool, observe the Emission Related DTC portion of the I/M System Status display.
Does the scan tool indicate any Emission Related DTCs set?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information System OK
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