Volvo Workshop Manuals
V70 XC AWD L5-2.4L Turbo VIN 56 B5254T (1998)
Relays and Modules > Relays and Modules - HVAC > Control Module HVAC > Component Information > Technical Service Bulletins > A/C - Service Manual Update > Page 213
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
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 lower the value, the less the control module compensates for the intensity of the sun. However, low compensation may lead to too high
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