FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

Inspection/Maintenance (I/M) Complete System Set Procedure



Inspection/Maintenance (I/M) Complete System Set Procedure

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 procedure 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 start-up IAT and the start-up ECT is 8°C (14.4°F) or less.
* The ECT is between 71-125°C (159-257°F).
* The IAT is between -20 to +80°C (-4 to +176°F).
* The battery voltage is between 11-18 volts.
* The fuel level is between 15-85 percent.

Test Description

Step 1 - Step 4:




Step 5 - Step 6:




The numbers below refer to the step numbers on the diagnostic table.
2. This step is to run the HO2S Heater Tests and initiate the EVAP System Test.
Preprogramming the scan tool will reduce the amount of time the oxygen sensor heaters operate while verifying the enable criteria.
3. This step is to run the EVAP, AIR and the Oxygen Sensor 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 Oxygen Sensor Tests begin once the engine is at operating temperature, in Closed Loop fuel control, and a calibrated amount of time has elapsed.
4. 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.
6. 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.