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 | |||
| It is not possible to read out fault code with pulse counter | ||
| Icon for USA vehicles for actuation of CHECK-ENGINE indicator lamp | ||
| Icon for EURO3 vehicles for actuation of engine diagnosis indicator lamp (is shown in HHT as ) | ||
| The indicator lamp only lights up if an emissions-relevant fault was already stored in the last driving cycle (exception "catalyst damaging" misfire, indicator lamp immediately lights up). | ||
| Ignition: ON | ||
| Check, regulate engine, see: DMAN Engine | ||
Fault memory | |||
Fault code | Fault text | Possible cause/note | Remedy |
No fault code | No fault detected | Depending on the complaint case, perform a complete ME-SFI [ME] electrics check | |
| A Cylinder 5 misfire | ||
Compression pressure | |||
ME-SFI [ME] fault code description: Misfire | |||
| A Cylinder 6 misfire | ||
Compression pressure | |||
ME-SFI [ME] fault code description: Misfire | |||
| A Cylinder 7 misfire | ||
Compression pressure | |||
ME-SFI [ME] fault code description: Misfire | |||
| A Cylinder 8 misfire | ||
Compression pressure | |||
ME-SFI [ME] fault code description: Misfire | |||
| Right knock sensor | Connector line | |
Knock sensor | |||
ME-SFI [ME] fault code description: Knock sensor | |||
| Left knock sensor | Connector line | |
Knock sensor | |||
ME-SFI [ME] fault code description: Knock sensor | |||
| Crankshaft position sensor (L5) | ||
ME-SFI [ME] fault code description: Crankshaft position sensor | |||
| Camshaft Hall sensor (B6/1) | ||
ME-SFI [ME] fault code description: Camshaft Hall-effect sensor | |||
| Angular deviation of camshaft to crankshaft | Check basic setting for camshafts | |
| Exhaust gas recirculation malfunction (function chain) | ||
ME-SFI [ME] fault code description: Exhaust gas recirculation malfunction (function chain) | |||
| Secondary air injection malfunction (function chain) | with CODE (925) low-emission EURO3/4 | |
with CODE (925) low-emission EURO3/4 | |||
with CODE (925) low-emission EURO3/4 | |||
ME-SFI [ME] fault code description: Secondary air injection malfunction (function chain) | |||
| Right catalyst efficiency too low | Right catalytic converter | |
ME-SFI [ME] fault code description: Catalyst efficiency too low | |||
| Left catalyst efficiency too low | Left catalytic converter | |
ME-SFI [ME] fault code description: Catalyst efficiency too low | |||
| Purge system leaky (function chain) | ||
| |||
ME-SFI [ME] fault code description: Purge system leaky (function chain) | | ||
| Purging switchover valve (Y58/1) | ||
ME-SFI [ME] fault code description: Purge system leaky (function chain) | |||
| Purge system slightly leaky | | |
ME-SFI [ME] fault code description: Purge system leaky (function chain) | | ||
| Purging switchover valve (Y58/1) | ||
ME-SFI [ME] fault code description: Purge control valve | |||
| A Activated charcoal canister shutoff valve | | |
| |||
ME-SFI [ME] fault code description: Activated charcoal canister shutoff valve | | ||
| A Fuel tank pressure senor (B4/3) electrical fault | | |
Activated charcoal canister clogged | |||
ME-SFI [ME] fault code description: Fuel tank pressure sensor | | ||
| Purge system has gross leak or | | |
| |||
ME-SFI [ME] fault code description: Purge system leaky (function chain) | | ||
| Fuel level sensor | Read out IC | |
ME-SFI [ME] fault code description: Misfire | |||
| A Speed signal FRT LH | Check anti-slip control (ASR) DMAN Chassis, Index 9 | |
ME-SFI [ME] fault code description: Speed signal | |||
| Idle speed control implausible | ||
ME-SFI [ME] fault code description: Idle speed control | |||
| Cylinder shutoff oil pressure sensor | CODE (479) cylinder shutoff | See |
STAR DIAGNOSIS | |||
ME-SFI [ME] fault code description: Cylinder shutoff oil pressure sensor | |||
| Power supply at ME-SFI [ME] control unit (N3/10) | ||
ME-SFI [ME] fault code description: Control unit power supply | |||
| Variable cruise control switch (S40/4) | ||
| CAN of ESP | ||
ME-SFI [ME] fault code description: CAN malfunctioning | |||
| A ME-SFI [ME] control unit (N3/10) | N3/10 | |
| ME-SFI [ME] control unit (N3/10) | N3/10 | |
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Gear implausible or transmission leaky | |||
ME-SFI [ME] fault code description: Command shift valve jams in pressure position | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: EGS control unit | |||
ME-SFI [ME] fault code description: Valve supply voltage | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Rpm sensor function and supply voltage | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: CAN fault detection | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Negative gear comparison (multiple times) | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Torque converter lockup clutch | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Torque converter lockup pulse width solenoid valve |