Note | The start/stop system is used for reducing fuel consumption by automatically switching off the engine when the vehicle is stationary and automatically starting it when the driver wants the vehicle to move on. The start/stop mode is automatically activated when, after moving on, the vehicle is driven for about 4 seconds at a minimum speed of 3 km/h. |
| Fault detection and fault display: |
| The start/stop system as a function is integrated in the engine control unit -J623- software. |
| The engine control unit -J623- features self-diagnosis to facilitate fault finding. |
| For fault finding, use the systems described in chapter „Vehicle diagnosis, testing and information system“ in „Guided Fault Finding“ mode → Chapter. |
| Battery recharging or jump start on vehicles with start/stop system: |
| For recharging or jump starting vehicles with start/stop system, note the following: using charging cable, first connect battery positive terminals, then body earth. This ensures that the battery sensor is not bridged. The direct charging of the battery on the negative terminal clamp means that the battery sensor is shunted and the battery data are not registered by the sensor while charging. Then, the values concerning the battery state and saved in the data bus diagnostic interface would not correspond to the values of the charged battery. |
| Replacing battery on vehicles with start/stop system: |
| Because of its higher deep-cycle resistance, only a special starter battery is used in vehicles with a start/stop system. |
| When renewing the starter battery, note correct part designation in → ETKA. Starter batteries for use in vehicles with a start/stop system are marked with „AGM“ (Absorbent Glass Mat) or „EFB“ (Enhanced Flooded Battery). |
| Following components are involved in the start/stop system: |
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| Clutch pedal switch -F36- |
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| Start/stop operation switch -E693- |
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| Coolant temperature sender -G62- |
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| Accelerator position sender -G79- |
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| Gearbox neutral position sender -G701- |
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| Control unit for ABS with EDL -J104- |
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| Climatronic control unit -J255- |
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| Control unit with display in dash panel insert -J285- |
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| Battery monitoring control unit -J367- |
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| Convenience system central control unit -J393- |
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| Power steering control unit -J500- |
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| Onboard supply control unit -J519- |
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| Voltage stabiliser -J532- |
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| Data bus diagnostic interface -J533- |
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| Engine control unit -J623- |
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