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 and using test equipment | |||
Connecting hand-held tester (HHT), reading fault memory | |||
Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge | |||
Socket box connection diagram - ME-SFI - testing of electrical system | Plug with red marking is not yet required at present, as no function is available in the ME-SFI [ME] control unit as yet | ||
| When disconnecting the couplings on the ME-SFI [ME] control unit, disconnect the center coupling first and reconnect the center coupling D last when reconnecting. | ||
| Measuring instrument/test connection column: | ||
| The numbers entered in brackets, such as e.g. in 1.0 (2A) mean: | ||
| A = coupling A in the wiring diagram | ||
| 2 = connection 2 in the wiring diagram | ||
| Ignition OFF | ||
| Check | ||
1 | ME-SFI [ME] control unit terminal 30, electrics test, gasoline injection system ME-SFI | ||
2 | ME-SFI [ME] control unit terminal 87, electrics test, gasoline injection system ME-SFI | ||
3 | Starter relay, electrics test, gasoline injection system ME-SFI | Models 170, 208, model 202 as of 1.6.97, model 210 as of 1.6.98 | |
4 | Hot film mass air flow sensor, electrics test, gasoline injection system ME-SFI | ||
5 | Intake air temperature sensor electrical test, fuel injection system, ME-SFI | ||
6 | Pressure sensor, electrics test, gasoline injection system ME-SFI | | |
7 | Fuel pump relay, electrics test, gasoline injection system ME-SFI | ||
8 | Coolant temperature sensor electrical test, fuel injection system, ME-SFI | ||
9 | ME-SFI [ME] control unit rpm signal, electrics test, gasoline injection system ME-SFI | ||
10 | O2 sensor signal upstream of CAT, electrics test, gasoline injection system ME-SFI | ||
11 | O2 sensor heater upstream of CAT, electrics test, gasoline injection system ME-SFI | ||
12 | O2 sensor signal downstream of CAT, electrics test, gasoline injection system ME-SFI | | |
13 | O2 sensor heater downstream of CAT, electrics test, gasoline injection system ME-SFI | | |
14 | Fuel injection valve (Y62/1), electrics test, gasoline injection system ME-SFI | ||
15 | |||
16 | Fuel injection valve (Y62/3), electrics test, gasoline injection system ME-SFI | ||
17 | Fuel injection valve (Y62/4), electrics test, gasoline injection system ME-SFI | ||
18 | Air injection relay, electrics test, gasoline injection system ME-SFI | 111.974 with CODE 494 (USA version) with CODE 807 (model year 1997) with CODE 808 (model year 1998) | |
19 | Air pump switchover valve, electrics test, gasoline injection system ME-SFI | Model 170 with code 923 (low-emission D3), model 202 model 202 with code 923 (low-emission D3) | |
20 | Model 170 with code 923 (low-emission D3), model 202 model 202 with code 923 (low-emission D3) | ||
21 | 111.974 | ||
22 | EGR switchover valve vacuum control, electrics test, gasoline injection system ME-SFI | 111.974 | |
23 | Exhaust gas recirculation valve, electrics test, gasoline injection system ME-SFI | 111.974 | |
24 | Camshaft timing adjustment solenoid, electrics test, gasoline injection system ME-SFI | ||
25 | Camshaft timing, electrics test, gasoline injection system ME-SFI | ||
26 | Purge control valve actuation, electrics test, gasoline injection system ME-SFI | ||
27 | Purge control valve vacuum control, electrics test, gasoline injection system ME-SFI | ||
28 | Purge system, electrics test, gasoline injection system ME-SFI | Model 170 model 202 as of 09/97 | |
29 | Activated charcoal canister shutoff valve, electrics test, gasoline injection system ME-SFI | Model 170 model 202 as of 09/97 | |
30 | Tank pressure sensor, electrics test, gasoline injection system ME-SFI | Model 170 model 202 as of 09/97 | |
31 | Purge monitoring pressure sensor, electrics test, gasoline injection system ME-SFI | 111.921/944/945/974/975 up to 31.8.97 | |
32 | CAN bus, electrics test, gasoline injection system ME-SFI | ||
33 | Oil level indicator switch, electrics test, gasoline injection system ME-SFI | ||
34 | Diagnostics line, electrics test, gasoline injection system ME-SFI | ||
35 | Compressor function, electrics test, gasoline injection system ME-SFI | Compressor | |
36 | Compressor magnetic clutch, electrics test, gasoline injection system ME-SFI | Compressor | |
37 | Air flap change-over actuator/air filter for compressor, electrics test, gasoline injection system ME-SFI | Compressor | |
38 | Suction fan control unit, electrics test, gasoline injection system ME-SFI | CODE 580 (air conditioning system) or with TEMPMATIC | |
39 | Refrigerant compressor shutoff, electrics test, gasoline injection system ME-SFI | Model 170 with M111.946 as of 6/98, model 202 with M111.921/945 as of 6/98, model 208 with M111.945 as of 6/98, model 210 with M111.942 as of 6/98 with CODE 580 (air conditioning system) or with TEMPMATIC | |
40 | Clutch pedal switch for starter release, electrics test, gasoline injection system ME-SFI | Model 170 with M111.973 with manual transmission | |
41 | Crash signal, electrics test, gasoline injection system ME-SFI | As of 06/98 |
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