Danger | Risk of death. Death may occur if body parts are drawn into rotating vehicle parts. | Do not insert your hand into rotating parts. Wear closed and snug-fitting work clothes. Secure area of rotating vehicle components against unauthorized access. | |
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 | ||
Connecting hand-held tester (HHT), reading fault memory | |||
Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge | |||
| Reading out the fault code with the pulse counter is not possible | ||
| Characters for USA vehicles for actuation of the CHECK-ENGINE indicator lamp | ||
| Characters for EURO3 vehicles for actuation of the engine diagnosis indicator lamp (displayed as in the HHT) | ||
| The indicator lamp only lights up if an emissions-relevant fault was already stored in the last driving cycle (exception: Misfires "harmful to the CAT", indicator lamp lights up immediately). | ||
| Ignition: ON | ||
| Check, regulate engine, see: Engine DMAN | ||
Fault memory | |||
Fault code | Fault text | Possible cause/note | Remedy |
No fault code | No fault detected | Depending on complaint, perform complete ME-SFI electrics test | |
| Hot film MAF sensor (B2/5) | ||
Hot film mass air flow sensor fault code description, ME-SFI | |||
| Pressure sensor (B28) | | |
Pressure sensor fault code description, ME-SFI | |||
| Intake air temperature sensor (in hot film mass air flow sensor B2/5) | ||
Intake air temperature sensor | |||
| Coolant temperature sensor (B11/4) | ||
Coolant temperature sensor fault code description, ME-SFI | |||
| Actual value potentiometer in throttle valve actuator (M16/6) | ||
Actual value potentiometer in the throttle valve actuator fault code description, ME-SFI | |||
| A right lambdasensor upstream of CAT (G3/4) | ||
Lambdasensor signal fault code description, ME-SFI | |||
| A right lambdasensor upstream of CAT (G3/4) aging correction variable exceeded | ||
Aging of lambdasensor upstream of CAT fault code description, ME-SFI | |||
| Lambdasensor heater of right lambdasensor upstream of CAT (G3/4) | ||
Lambdasensor heater fault code description, ME-SFI | |||
| Right lambdasensor downstream of CAT (G3/6) | with CODE (925) low-pollutant EURO3 | |
Lambdasensor signal fault code description, ME-SFI | |||
| Right lambdasensor upstream of CAT (G3/4) | ||
Lambdasensor signal fault code description, ME-SFI | |||
| Lambdasensor heater of right lambdasensor downstream of CAT (G3/6) | with CODE (925) low-pollutant EURO3 | |
Lambdasensor heater fault code description, ME-SFI | |||
| A left lambdasensor upstream of CAT (G3/3) | ||
Lambdasensor signal fault code description, ME-SFI | |||
| A left lambdasensor upstream of CAT (G3/3) aging correction variable exceeded | ||
Aging of lambdasensor upstream of CAT fault code description, ME-SFI | |||
| Lambdasensor heater of left lambdasensor upstream of CAT (G3/3) | ||
Lambdasensor heater fault code description, ME-SFI | |||
| Left lambdasensor downstream of CAT (G3/5) | with CODE (925) low-pollutant EURO3 | |
Lambdasensor signal fault code description, ME-SFI | |||
| Left lambdasensor downstream of CAT (G3/5) | with CODE (925) low-pollutant EURO3 | |
Lambdasensor signal fault code description, ME-SFI | |||
| Lambdasensor heater of left lambdasensor downstream of CAT (G3/5) | with CODE (925) low-pollutant EURO3 | |
Lambdasensor heater fault code description, ME-SFI | |||
| A self-adjustment of right cylinder bank "partial load" mixture formation to limit value of ME-SFI [ME] control unit (N3/10) | Unmetered air, injection valve diaphragm pressure regulator, wear on engine | |
Self-adjustment of mixture formation to limit value fault code description, ME-SFI | |||
| A self-adjustment of left cylinder bank "partial load" mixture formation to limit value of ME-SFI [ME] control unit (N3/10) | Unmetered air, injection valve diaphragm pressure regulator, wear on engine | |
Self-adjustment of mixture formation to limit value fault code description, ME-SFI | |||
| Injection valve (Y62y1) cylinder 1 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y2) cylinder 2 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y3) cylinder 3 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y4) cylinder 4 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y5) cylinder 5 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y6) cylinder 6 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y7) cylinder 7 | ||
Injection valves fault code description ME-SFI | |||
| Injection valve (Y62y8) cylinder 8 | ||
Injection valves fault code description ME-SFI | |||
| A misfire | ||
Compression pressure | |||
Misfire fault code description ME-SFI | |||
| A misfire cylinder 1 | ||
Compression pressure | |||
Misfire fault code description ME-SFI | |||
| A misfire cylinder 2 | ||
Compression pressure | |||
Misfire fault code description ME-SFI | |||
| A misfire cylinder 3 | ||
Compression pressure | |||
Misfire fault code description ME-SFI | |||
| A misfire cylinder 4 | ||
Compression pressure | |||
Misfire fault code description ME-SFI |