Danger | Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC) | Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines. | |
Danger | Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel. | No fires, sparks, open flames or smoking. Pour fuels into suitable and appropriately marked containers only. | |
Topical note | Notes on avoiding damage to ignition system | Motor 104 mit Benzin-Einspritz- und Zündsystem HFM | |
Fuel injection and ignition system (HFM-SFI) diagnosis, advanced information | |||
Troubleshooting | |||
Complaint | Possible cause | Notes | Remedy |
Engine starts reluctantly and is reluctant to speed up | Fuel injection valves (Y62), actuation and injection duration | ||
Engine fails to start | Power supply of the overvoltage protection relay (K1/2) is missing | ||
) | |||
) | |||
Engine has rough idling | Exhaust gas recirculation valve | ||
Engine has rough idling and poor output | Camshaft timing | ||
Referenced documents
- ad0751p2000b Fuel injection and ignition system (HFM-SFI) diagnosis, advanced information
- ad0751p2000b
- ah1510p000201d Notes on avoiding damage to ignition system
- as0000z003501a Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)
- as4700z000101a Risk of explosion caused by fuel igniting, risk of poisoning caused by inhaling and swallowing fuel as well as risk of injury to eyes and skin caused by contactwith fuel.