V70 XC AWD L5-2.4L Turbo VIN 56 B5254T (1998)
Checking the sun sensor programming
No diagnostic trouble codes (DTCs) stored.
The fault is permanent.
The sun sensor sensitivity in the ECC control module is programmed too high or too low.
The passenger compartment temperature does not correspond to the set value.
The passenger compartment temperature is not reduced when sun intensity is high.
Airflow may vary.
Programming ECC solar sensor
Check the programming of the ECC sun sensor sensitivity
The intensity of the sun affects the temperature in the passenger compartment. To maintain an even temperature in the passenger compartment
irrespective of the intensity of the sun, the ECC control module compensates the temperature setting depending on the signal from the sun sensor.
The degree of sensitivity can be programmed so that the calculation of the ECC control module can be adapted. This allows some account to be taken
of the driver's wishes for the climate settings in the car. The sensitivity can be set in 7 different steps. from -4 to +2.
The higher the value, the more the control module compensates for the intensity of the sun. However if compensation is high. drafts may be felt as
the fan speed increases.
The lower the value, the less the control module compensates for the intensity of the sun. However, low compensation may lead to too high
temperature in the passenger compartment when the intensity of the sun is high. Value -4 results in no compensation. The value should only be
changed if there is no doubt that the customer complaint is due to sun compensation.