Charge Air Pressure Sensor - G31-, Checking: General Description

The Charge Air Pressure Sensor -G31- is located in the inlet to the intake manifold. The Engine/Motor Control Module -J623- uses the sensor signal to regulate the charge air pressure. There is no substitute function in the event of signal failure. If charge air pressure monitoring is shut off, this may lead to a significant reduction in engine output.

Special tools and workshop equipment required 

• Multimeter.
• Wiring Diagram.
• Scan Tool.

Test requirements 

• Fuses OK.
• Battery voltage OK.
• Switch OFF all electrical and electronic accessories.
• Vehicles with automatic transmission, ensure the selector lever position is in "P".
• Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake applied.
• Observe all safety precautions: SAFETY PRECAUTIONS .
• View clean working conditions: CLEAN WORKING CONDITIONS .