Description
The purpose of the I/M Complete System Set Procedure is to satisfy the enable criteria necessary to execute all of the I/M readiness diagnostics, and complete the trips for those particular diagnostics. When all diagnostic tests are completed, the I/M System Status indicators are set to YES. Perform this test when more than one or all of the I/M System Status indicators are set to NO.
Conditions for Running
| • | The intake air temperature (IAT) is at least -7°C (20°F). |
| • | The engine coolant temperature (ECT) is at least 70°C (158°F). |
| • | The vehicle is driven at a steady speed above 40 km/h (25 mph). |
| • | The battery voltage is between 10.5-16 volts. |
Diagnostic Aids
Rough road conditions may prevent some of the tests from running. Extreme high or low ambient temperatures may prevent tests such as heated oxygen (HO2S) heater and evaporative emission (EVAP) System from initiating. If a step is interrupted before completion, perform the remaining portion of the set procedures. Any portion of the set procedure that requires the engine at operating temperature may be repeated. This allows most of the diagnostics to run and the remaining tests can be performed using the individual System Set Procedures.
The scan tool can be used to monitor each of the I/M System Status indicators during the I/M Complete System Set Procedure. When all of the indicators for a test step have updated to YES, testing can move on to the next step even if the remaining portion of the test is not complete. For example, step 3 is designed to run the Catalyst Test. The procedure instructs the technician to operate the vehicle in the enable conditions for 6 minutes. If the test updates to YES within 4 minutes, it is not necessary to continue with the enable conditions and testing can advance to the next step.
Test Description
The numbers below refer to the step numbers in the diagnostic table.
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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.
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This step is to run the heated oxygen sensor (HO2S) Heater tests and evaporative emission (EVAP) System tests.
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This step is to run the Catalyst test. The Catalyst test runs during the specified cruise period.
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This step is to set up the Oxygen Sensor (O2S) tests. These tests run during the idle period immediately following a cruise period that meets a minimum calibrated RPM and time period.
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This step is to run the Oxygen Sensor tests and the EVAP Tests. These tests run during the idle period immediately following a cruise period that meets a minimum calibrated RPM and time period.
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Perform the individual system test for any of the systems that do not update to YES.
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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.
Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Did you perform the Inspection/Maintenance (I/M) System Check? | -- | Go to Step 2 | ||||||||
Important: Once the engine is started, DO NOT turn OFF the engine for the remainder of the procedure until the test is complete. Is the action complete? | 2 minutes | Go to Step 3 | -- | |||||||
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Caution: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
Important: In order for the remaining portion of this test to run, the vehicle must operate in the following conditions: Is the action complete? | -- | Go to Step 4 | -- | |||||||
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Caution: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage. In order for the next group of tests to run, the vehicle must operate in the following conditions:
Is the action complete? | -- | Go to Step 5 | -- | |||||||
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Caution: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.
Important: In order for the remaining portion of this test to run, the vehicle must operate in the following conditions: Is the action complete? | -- | Go to Step 6 | -- | |||||||
With a scan tool, observe the I/M System Status display. Did all of the I/M System Status indicators update to YES? | -- | Go to Step 7 | Go to the I/M System Set Procedure for the indicated systems | |||||||
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? | -- | System OK |
