Climate Control Exhaust Gas Sensor: Service and Repair

Sensor For Air Quality -G238-, Removing And Installing


NOTE:







- The Sensor for air quality -G238- is a highly sensitive electronic component which can be damaged if it comes in direct contact with solvents, fuels or chemicals (e.g. impurities may enter through area -A-).
- Do not install sensors that were previously improperly stored e.g. in tool boxes etc.
- Do not store removed sensors in areas that are contaminated with solvents, fuels and certain other chemicals (fluids or gases).


Removing and installing
- Remove plenum cover.







- Disconnect harness connector -A- from sensor.
- Disengage locking mechanism -B- and push sensor -C- down.

Terminal assignment in connector -A-
1 - B+ (Terminal "15")
2 - Ground (Terminal "31")
3 - Signal wire to A/C- control head -E87- (square wave signal cannot be measured)