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. | |
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 | |||
| When detaching the couplings on the ME-SFI control unit, detach the center coupling first and when plugging in the couplings, plug in the center coupling D last. | ||
| Note on the measuring instrument/test connection column. The numbers entered in the circuit, e.g. in 1.0 (2A) mean: | ||
| A = coupling A in wiring diagram | ||
| 2 = bush 2 in wiring diagram | ||
| Ignition OFF | ||
| Check | ||
1 | Circuit 30 ME-SFI control unit; testing of ME-SFI gasoline injection system electrics | ||
2 | Circuit 87 ME-SFI control unit; testing of ME-SFI gasoline injection system electrics | ||
3 | Start relay; testing of ME-SFI gasoline injection system electrics | ||
4 | Hot film mass air flow sensor; testing of ME-SFI gasoline injection system electrics | ||
5 | Intake air temperature sensor electrical test, fuel injection system, ME-SFI | ||
6 | Fuel pump relay; testing of ME-SFI gasoline injection system electrics | ||
7 | Coolant temperature sensor electrical test, fuel injection system, ME-SFI | ||
8 | Rpm signal ME-SFI control unit; testing of ME-SFI gasoline injection system electrics | ||
9 | CAN data bus; testing of ME-SFI gasoline injection system electrics | ||
10 | Diagnostics line; testing of ME-SFI gasoline injection system electrics | ||
11 | Circuit 50 starter signal; testing of ME-SFI gasoline injection system electrics | ||
12 | O2 sensor signal upstream of catalytic converter; testing of ME-SFI gasoline injection system electrics | ||
13 | O2 sensor heater upstream of catalytic converter; testing of ME-SFI gasoline injection system electrics | ||
14 | Camshaft timing solenoid; testing of electrical components of ME-SFI gasoline injection system | ||
15 | Camshaft timing; testing of ME-SFI gasoline injection system electrics | ||
16 | Oil level check switch; testing of ME-SFI gasoline injection system electrics | ||
17 | Crash signal; testing of ME-SFI electrics | ||
18 | Fuel injection valve 1; testing of ME-SFI gasoline injection system electrics | ||
19 | Fuel injection valve 2; testing of ME-SFI gasoline injection system electrics | ||
20 | Fuel injection valve 3; testing of ME-SFI gasoline injection system electrics | ||
21 | Fuel injection valve 4; testing of ME-SFI gasoline injection system electrics | ||
22 | Tank vent valve; testing of ME-SFI gasoline injection system electrics | ||
23 | Vacuum control tank vent valve; testing of ME-SFI gasoline injection system electrics | ||
24 | Exhaust gas flap valve; testing of ME-SFI electrics gasoline injection system | ||
25 | Radiator fan; testing of ME-SFI gasoline injection system electrics | Engine 111.950/980 in model 638 as from 01.02.00 |
Referenced documents
- ad0000s1000az Connection and use of testing equipment
- ad0000s200003a Connecting Hand-Held Tester (HHT), reading fault memory
- ad0761p200001a Socket box connection diagram - ME-SFI - testing of electrical system
- ad0761s2000a Gasoline injection and ignition system (ME-SFI) - Diagnosis - Previous knowledge
- 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)