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 of the I/M System Status indicators are set to NO.
Conditions for Running
| • | The barometric pressure (BARO) is more than 74 kPa. |
| • | The start-up engine coolant temperature (ECT) is more than 5°C (41°F). |
| • | The start-up ECT is less than 30°C (86°F). |
| • | The start-up intake air temperature (IAT) is more than 5°C (41°F). |
| • | The start-up IAT is less than 30°C (86°F). |
| • | The difference between the start-up ECT and the start-up IAT is less than 8°C (14.4°F). |
| • | The battery voltage is between 11-18 volts. |
| • | The fuel level is between 16-84 percent. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
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This step runs the HO2S Heater Tests and initiate the EVAP System Test.
Preprogramming the scan tool will reduce the amount of time the oxygen sensor (O2S) heaters operate while verifying the enable criteria.
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This step runs the evaporative emission (EVAP), secondary air injection (AIR) and the O2S tests. The EVAP test begins once the engine coolant reaches a calibrated temperature. The AIR test, if equipped, begins shortly after Closed Loop and the indicated speed is achieved. The O2S 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 runs the exhaust gas recirculation (EGR) tests. The EGR tests are run during a gradual deceleration with a closed throttle. The vehicle speed is required in order to maintain a high, steady manifold absolute pressure (MAP) signal.
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This step runs the catalyst tests. This test runs during the idle period immediately following a cruise period that meets a minimum calibrated RPM and time period.
Step | Action | Value(s) | Yes | No | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Did you perform the Inspection/Maintenance (I/M) System Check? | -- | Go to Step 2 | |||||||||||||
Important: Whenever the ignition is turned ON, ignition positive voltage is supplied to the heated oxygen sensor (HO2S) heaters. After verifying the enable criteria, turn OFF the ignition for approximately 5 minutes to allow the sensors to cool before continuing with the test. Once the engine is started, DO NOT turn the engine OFF for the remaining portion of the set procedure. Is the action complete? | 2 minutes | Go to Step 3 | -- | |||||||||||||
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Caution: Refer to Road Test Caution in the Preface section. 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 | -- | |||||||||||||
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Caution: Refer to Road Test Caution in the Preface section. 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: Refer to Road Test Caution in the Preface section. 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 | -- | |||||||||||||
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 7 | Go to the I/M System Set Procedure for the indicated systems that have not updated to YES | ||||||||||||
7 | 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 |
