VACUUM HOSE CHECK
- Using the VACUUM HOSE ROUTING diagram as a guide, check that the vacuum hoses are correctly connected.
- Check the connection of the vacuum hoses, (removed, loose, etc.) and confirm that there are no sharp bends or damage.
MASS AIRFLOW SENSOR CHECK
To inspect these parts, refer to DIAGNOSTIC TROUBLE CODE CHART .
BAROMETRIC PRESSURE SENSOR CHECK
To inspect the sensor, refer to DIAGNOSTIC TROUBLE CODE CHART .
ENGINE COOLANT TEMPERATURE SENSOR CHECK
To inspect the sensor, refer to DIAGNOSTIC TROUBLE CODE CHART .
INTAKE AIR TEMPERATURE SENSOR CHECK
To inspect the sensor, refer to DIAGNOSTIC TROUBLE CODE CHART .
FUEL TANK DIFFERENTIAL PRESSURE SENSOR CHECK
To inspect the sensor, refer to FUEL TANK DIFFERENTIAL PRESSURE SENSOR CHECK .
EVAPORATIVE EMISSION VENTILATION SOLENOID CHECK
Refer to EVAPORATIVE EMISSION VENTILATION SOLENOID CHECK .
EGR VALVE (STEPPER MOTOR) CHECK
Required Special Tool
MB991658: Test Harness Set
EGR VALVE (STEPPER MOTOR) CLEANING
Note. DO not use solvents or other cleaning agents, which will enter the motor and cause a malfunction.
Remove the EGR valve and make sure that it is not stuck and does not have any carbon deposits. If there are any carbon deposits, use a wire brush to clean it.
To inspect these parts, refer to DIAGNOSTIC TROUBLE CODE CHART .
To inspect the sensor, refer to DIAGNOSTIC TROUBLE CODE CHART .
CRANKSHAFT POSITION SENSOR CHECK
To inspect the sensor, refer to DIAGNOSTIC TROUBLE CODE CHART .
