In the above vehicles, corrosion on a connector and/or a damaged wiring harness can adversely affect the control of the air-conditioning system.
If there are problems in controlling the temperature of the air-conditioning system (set temperature is not reached or maintained), we recommend checking the wiring of the driver side door.
The connector contacts of the door wiring harness can corrode due to water entry. In addition, the wiring harness can also be damaged by contact with the window lift mechanism.
The outside temperature sensor, whose measured values are also used to control the air-conditioning system, is located in the left side mirror. The wiring to the sensor is part of the door wiring harness. Faults in this area can also affect the control of the air-conditioning system.
Please keep this information in mind if there are complaints with regard to temperature control of the air-conditioning system.
In particular, check the wiring/plug connection in the area of the A-pillar at the driver side door and also behind the door trim panel.
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only.
Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.
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