Function check using actual values with HHT (testing idle speed)
Actual value no. | Actual value | Specified value |
| Coolant temperature | > 80 °C |
| Engine speed | 750 50 rpm |
| Lambda control (in the event of complaint the Lambda control must be measured at idle speed and at 2500 rpm with the purge line (to engine) disconnected and sealed) | 0 10 % |
| Ignition advance angle (the ignition advance angle is also used to stabilize idle speed and therefore in an extreme case the ignition advance angle may briefly deviate 10 ° from the specified value) | 5 5 ° CKA before TDC |
| Idle speed contact (accelerator pedal not operated) | Display: ON |