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 | |
112.942 in MODEL 163.154 up to 31.5.98 | |||
| 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 | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Modulating pressure control solenoid valve | |||
ME-SFI [ME] fault code description: Shift pressure control solenoid valve | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Shift 1–2/4–5 solenoid valve | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Shift 2–3 solenoid valve | |||
| Read out EGS control unit (N15/3) fault memory | ||
ME-SFI [ME] fault code description: Shift 3–4 solenoid valve | |||
| Engine/air conditioning electric suction fan (M4/3) | ||
| Variable intake manifold switchover valve (Y22/6) | ||
| Angular deviation of camshaft to crankshaft | Check basic setting for camshafts | |
| CAN of electronic ignition lock control unit (EZS) | ||
| Lambda sensors upstream of catalytic converter (G3/3 and G3/4) mixed up | Check connectors | |
| Oil sensor (oil level/temperature/quality) (B40): Oil temperature implausible | ||
| Oil sensor (oil level/temperature/quality) (B40): Oil level implausible | ||
| Oil sensor (oil level/temperature/quality) (B40): Oil quality implausible | ||
| Oil sensor (oil level/temperature/quality) (B40): Oil temperature too high | ||
| Engine/air conditioning electric suction fan (M4/3) | ||
| Oil sensor (oil level/temperature/quality) (B40): Water in oil | ||
| Safety fuel shutoff detected | ||
Throttle valve actuator sluggish/jams | |||
Check intake tract for residues | |||
| Variable intake manifold switchover valve (Y22/6) | ||
| Throttle valve actuator (M16/6) jams (iced up) | Actuator | |
| Knock control of ME-SFI [ME] control unit (N3/10) at control stop | Increased tendency to knock due to low-quality fuel, carbonized combustion chambers or mechanical damage | |
ME-SFI [ME] control unit (N3/10) | |||
ME-SFI [ME] fault code description: Knock control in ME-SFI [ME] control unit hardware fault | |||
| EGR pressure transducer (Y31/1) | ||
ME-SFI [ME] fault code description: EGR pressure transducer | |||
| Air pump switchover valve (Y32) | with CODE (925) low-emission EURO3 | |
ME-SFI [ME] fault code description: Secondary air injection | |||
| Air pump relay | with CODE (925) low-emission EURO3 | |
ME-SFI [ME] fault code description: Secondary air injection | |||
| Refrigerant pressure in air conditioning too high | Check air conditioning system | |
| Pedal value sensor (B37) | Signal 1 | |
Signal 2 | |||
ME-SFI [ME] fault code description: Pedal value sensor | |||
| Start enable of DAS not sent | ||
Incorrect operation | |||
Check control units and part no. | |||
| Throttle valve actuator (M16/6) | ||
ME-SFI [ME] fault code description: Throttle valve actuator | |||
| Stop lamp switch | Check anti-slip control (ASR) DMAN Chassis, Index 9 | |
| CAN of electronic ignition lock control unit (EZS) | ||
| Rough road detection signal (via comparison of wheel speeds) | Check anti-slip control (ASR) DMAN Chassis, Index 9 | |
| ME-SFI [ME] control unit incorrectly coded (coded for manual transmission, vehicle has automatic transmission) | ||
| ME-SFI [ME] control unit incorrectly coded (coded for automatic transmission, vehicle has manual transmission) | ||
| Transmission variant cannot be tested due to undervoltage at EGS control unit (N15/3) | ||
| Crash signal implausible | As of 06/98 | |
| A CAN fault: Transmission protection malfunction of EGS control unit (N15/3) | ||
Check IC DMAN Communication, Index 1 | |||
ME-SFI [ME] fault code description: CAN malfunctioning |