Display zone | Significance | Explanatory notes |
4 | –
| Fresh air blower -V2- stiff or blocked |
| l
| Remove fresh air blower -V2- and check for foreign matter |
l
| Replace fresh air blower -V2- with fresh air blower control unit -J126- |
|
| –
| Fresh air blower -V2- stiff or blocked |
–
| Short circuit in fresh air blower control unit -J126- or fresh air blower -V2- |
| l
| Remove fresh air blower -V2- and check for foreign matter |
l
| Replace fresh air blower -V2- with fresh air blower control unit -J126- |
|
| –
| No actuation signal from operating and display unit, Climatronic control unit -J255- being applied to fresh air blower control unit -J126- (e.g. air conditioner switched off) |
| l
| Activate actuation of fresh air blower -V2- at operating and display unit, Climatronic control unit -J255- |
l
| Check for open circuit in wiring between fresh air blower control unit -J126- and operating and display unit, Climatronic control unit -J255- |
|
| –
| Implausible signal from fresh air blower control unit -J126- (signal frequency outside permissible tolerance) |
| –
| Fresh air blower control unit -J126- defective, replace fresh air blower -V2- with fresh air blower control unit -J126- |
|
| –
| No signal from fresh air blower control unit -J126- |
| l
| Check for short to positive in wiring between fresh air blower control unit -J126- and operating and display unit, Climatronic control unit -J255- |
l
| Fresh air blower control unit -J126- defective, replace fresh air blower -V2- with fresh air blower control unit -J126- |
|