| –
| Use hose clamps up to Ø 25 mm -3094-, for example, to pinch off the two coolant hoses between the engine and the heat exchanger on the air conditioner. |
| –
| Select the display group “007” → Chapter in the “Read measured value block” function → Chapter |
| –
| Repeat the refrigeration capacity test → Chapter. |
| –
| During the inspection, pay particular attention to the measured values for the evaporator outlet temperature sender -G263- and for the centre vent temperature sender -G191- in display group “007” |
| l
| Do the measured values in the display zones deviate from each other by less than 3 °C? |
|
↓
yes
↓ | ↓
no
↓ |
| –
| Remove the hose clamps from the two coolant hoses. |
↓ | | –
| Set the air vent direction on the operating and display unit for air conditioner/Climatronic -E87- to “dash panel vents” and to “footwell”. |
|
| –
| Check actuation of the temperature flap positioning motor -V68- → Anchor (perform final control diagnosis) |
| –
| Check the position of the temperature flaps and the relative positions of the gear wheels on the positioning motor and on the temperature flap → Chapter. |
| | –
| Select the display group “007” → Chapter in the “Read measured value block” function → Chapter |
| –
| Repeat the refrigeration capacity test → Chapter. |
| –
| Compare the measured values in display zones “1” (footwell vent temperature sender -G192-), “2” (centre vent temperature sender -G191-) and “3” (evaporator outlet temperature sender -G263-) |
| –
| Check that the sender with the measured value discrepancy has been installed correctly and check its electrical connections for contact resistance. |
| –
| Eliminate the cause of the defective measured value. Replace the defective sender, if necessary. |
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