Display group 50 - Speed control - Operating condition
| Display group 50 - Speed control - Operating condition | ||||||
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| Read measured value block 50 | → | Indicated on display | ||||
| xxxx rpm | xxxx rpm | Text | Text | |||
| 1 | 2 | 3 | 4 | Display zones | Specification | Evaluation |
| Air conditioning compressor operating condition (Compr. ON / Compr. OFF) | Compr. ON or Compr. OFF | --- | ||||
| Air conditioning operating condition (A/C-High / A/C-Low) | A/C-High or A/C-Low | --- | ||||
| Engine speed (specified idle speed) | 700 rpm | --- | ||||
| Engine speed (actual idle speed) | 640...720 rpm | Evaluating display group 1, display zone 1 - Engine speed (idle speed) | ||||
NOTE:
- Notes on display zones 1 and 2:
- The rpm in display zone 1 (measured rpm) is the actual engine speed.
- The rpm in display zone 2 (specified rpm) is theoretical engine speed calculated by the Motronic Engine Control Module (ECM) J220. at idle, the Motronic Engine Control Module (ECM) J220 always tries to adapt the actual engine speed to the specified engine speed.
NOTE:
- Notes on display zones 3 and 4:
- A/C-High = Air conditioner demands high heating or cooling performance. A/C-Low = Air conditioner not turned on.
- "Compr. OFF" is always displayed on vehicles with no air conditioner.
- Check signals to and from air conditioning → A/C compressor signal, checking .