Description
The purpose of the Inspection/Maintenance (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
Cold Start
| • | The barometric pressure (BARO) is more than 74 kPa. |
| • | The start-up engine coolant temperature (ECT) is between 4-30°C (39-86°F). |
| • | The start-up intake air temperature (IAT) is between 4-30°C (39-86°F). |
| • | The difference between the startup IAT and the startup ECT is 8°C (14.4°F) or less. |
| • | The battery voltage is between 9-18 volts. |
| • | The fuel level is between 15-85 percent. |
| • | The Evaporative Emission (EVAP) System requires the above conditions along with the following: |
| - | Three or more drive cycles with a minimum of 17 hours between cycles |
| - | The estimated ambient temperature at the end of this drive cycle is between 2-32°C (36-89°F). |
| - | The shutdown ECT is 70°C (158°F) or higher. |
| - | A refueling event is not detected. |
Test Description
The numbers below refer to the step numbers on the diagnostic table.
-
This step is to run the heated oxygen sensor (HO2S) heater diagnostics and initiate the EVAP System diagnostic.
-
This step is to run the EVAP, AIR and the oxygen sensor diagnostics. 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 oxygen sensor diagnostics begin once the engine is at operating temperature, in Closed Loop fuel control, and a calibrated amount of time has elapsed.
-
This step is to run 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 | -- | |||||||
|
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 | -- | |||||||
|
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 | -- | |||||||
5 |
Important: If only one test status indicates No, go to the I/M System DTC Table for the I/M System Set Procedure for the indicated system. 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 | |||||||
6 | 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 |
