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Trouble Godes - diagramas.diagram...

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FEngine management<br />

<strong>Trouble</strong> code identification<br />

scanner 1 Fault location<br />

type<br />

-<br />

Engine control module (ECM) - data<br />

exchange not possible<br />

Model: 3 SerieslCompact (E36) 3 Series (E46) 520i (E34)<br />

5 Series (E39) 7 Series (E38) 23<br />

Probable cause<br />

Wiring between DLC and ECM, supply voltage, engine control<br />

relay, DLC<br />

Engine control module (ECM) - undefined Disconnect ECM multi-plug for at least 10 min. - check if<br />

00<br />

fault<br />

I No fault found<br />

trouble code reappears before replacing ECM<br />

I -<br />

1 ( Ignition circuit, cyl. 1 - defective I Wiring, connector, ignition coil, ECM<br />

I MS42: Ignition circuit, cyl. 2 - defective ( Wiring, connector, ignition coil, ECM<br />

MS41: Ignition circuit, cyl. 2 - defective<br />

Wiring, connector, ignition coil, ECM<br />

Ignition circuit, cyl. 3 - defective I Wiring, connector, ignition coil, ECM<br />

I MS42: lgnition circuit, cyl. 4 - defective I Wiring, connector, ignition coil, ECM<br />

3 ( MS41: Ignition circuit, cyl. 4 - defective<br />

1 Ignition circuit, cyl. 5 - defective<br />

I Wiring, connector, ignition coil, ECM<br />

I Wiring, connector, ignition coil, ECM<br />

-<br />

MS42: Ignition circuit, cyl. 6 - defective Wiring, connector, ignition coil, ECM<br />

5<br />

MS41: Ignition circuit, cyl. 6 - defective<br />

I Injector, cyl. 6 - circuit malfunction I Wiring, injector<br />

( MS42: Injector, cyl. 2 - circuit malfunction I Wiring, injector<br />

MS41: Injector, cyl. 2 - circuit malfunction<br />

Injector, cyl. 4 - circuit malfunction<br />

I MS42: Injector, cyl. 1 - circuit malfunction I Wiring, injector<br />

8 I MS41: Injector, cyl. 1 - circuit malfunction I Wiring, injector<br />

10<br />

11<br />

12<br />

Mass air flow (MAF) sensorlvolume air flow<br />

(VAF) sensor - circuit malfunction<br />

AC control modulelECM communication -<br />

malfunction<br />

Wiring, connector, ignition coil, ECM<br />

Wiring, injector<br />

Wiring, injector<br />

MS42: Engine coolant temperature (ECT) Wiring, connector(s), ECT sensor<br />

sensor - malfunction<br />

14 MS41: Throttle position (TP) sensor -<br />

defective<br />

16<br />

MS42: Engine coolant temperature (ECT)<br />

sensor - malfunction<br />

MS41142: Engine coolant temperature (ECT)<br />

sensor - malfunction<br />

Evaporative emission (EVAP) pressure<br />

sensor - malfunction<br />

Vehicle speed sensor (VSS) - incorrectho<br />

signal<br />

ECMltransmission control module (TCM)<br />

communication - short to earth<br />

MS42: Intake air temperature (IAT) sensor -<br />

malfunction<br />

MS41: intake air temperature (IAT) sensor -<br />

malfunction<br />

Wiring, connector(s), MAF sensorNAF sensor<br />

Wiring, AC control module<br />

Wiring, connector(s), ECT sensor<br />

Wiring, connector(s), ECT sensor<br />

Wiring, EVAP pressure sensor<br />

Wiring, instrument panel, VSS<br />

I Wiring, connector(s), TP sensor<br />

Wiring, ECM, TCM<br />

Wiring, connector(s), IAT sensor<br />

Wiring, connector(s), IAT sensor<br />

Wiring, AC condenser blower motor relay, AC refrigerant<br />

high pressure switch, AC refrigerant low pressure switch,<br />

AC control module

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