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 engine coolant temperature (ECT) is more than 4°C (39°F) and less than 55°C (131°F). |
| • | The intake air temperature (IAT) is more than 4°C (39°F) and less than 65°C (149°F). |
| • | The fuel level is between 10-90 percent. |
| • | Battery voltage is between 10-16 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 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.
If the vehicle has recently run, start this procedure at step 3. This will allow the tests that require the engine at operating temperature to run. Using this method allows shorter cool down periods if the tests requiring a cold start do not initiate.
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 EVAP and heated oxygen (HO2S) tests. The procedure instructs the technician to operate the vehicle in the enable conditions for 6 minutes. If all tests have updated 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 on the diagnostic table.
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Ensure 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 initiate the EVAP System Test.
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This step is to run the EVAP and the oxygen sensor (O2S) tests. The EVAP Test begins once the engine coolant reaches a calibrated temperature. The Oxygen Sensor Tests begin once the engine is at operating temperature, in Closed Loop Fuel Control, and a calibrated amount of time has elapsed.
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This step is to run the Catalyst and HO2S Heater Tests.
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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 | ||||||||||
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. 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 4 | -- | |||||||||
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 6 | -- | |||||||||
Observe the I/M System Status display with a scan tool. Did all of the I/M System Status indicators update to YES? | -- | Go to Step 6 | Go to the I/M System Set Procedure for the indicated systems | |||||||||
Observe the Emission Related DTC portion of the I/M System Status display with a scan tool. Does the scan tool indicate any Emission Related DTCs set? | -- | System OK |
