If there are problems with the temperature control of the heating or air conditioning in the above vehicles, a faulty evaporator temperature sensor (Fig. 1) may be responsible.
The fault can be diagnosed by reading out the event memory of the air conditioning and by querying the measured value blocks.
The evaporator temperature sensor is located on the left side in the upper area of the heating / evaporator box and is difficult to access.
You can access the sensor in the following manner from the driver’s footwell in left-hand drive vehicles:
TIP: Aids such as an optical square and flexible inspection lamp facilitate disassembly/assembly
Important safety note