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Autodata - Diagnostic Trouble Codes Fault locations and probable causes - 2004 edition

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I<br />

Model: 316ilCompact, 318iliSICoupelCompact, 320i, 3251 (E36) 23 1,8i<br />

518i, 520i, 525iliX (E34) 750i (E32) 850ilCSI (E31)<br />

Engine management I<br />

Accessing <strong>and</strong> erasing - scanner type<br />

The engine control module (ECM) fault memory can also be<br />

checked using diagnostic equipment connected to the data<br />

link connector (DLC).<br />

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

Scanner<br />

type<br />

I <strong>Fault</strong> location<br />

I<br />

- I No fault found<br />

I<br />

0 I Engine control module (ECM) - undefined fault I -<br />

I<br />

1 I Engine control module (ECM) - defective I ECM<br />

I<br />

I<br />

I<br />

Probable cause<br />

1 0 I Fuel pump relay - malfunction I Wiring, connector(s), fuel pump relay<br />

2 Idle speed control (ISC) actuatorlidle air control<br />

(IAC) valve - malfunction<br />

I<br />

3 I Fuel pump relay - malfunction I Wiring, connector(s), fuel pump relay<br />

3<br />

3 El<br />

3<br />

4<br />

5<br />

5<br />

6<br />

7<br />

10<br />

12<br />

15<br />

16<br />

16<br />

17<br />

18<br />

18<br />

19<br />

Injector(s), cyl. 1 & 3 or cyl. 2, 4, 6 & 8, 10, 12 -<br />

circuit malfunction<br />

Injector(s), cyl. 2 & 4 - circuit malfunction<br />

Injector(s), cyl. 1 - circuit malfunction<br />

Injector(s), cyl. 3 - circuit malfunction<br />

Evaporative emission (EVAP) canister purge<br />

valve - malfunction<br />

Injector(s), cyl. 2 - circuit malfunction<br />

Injector(s) - circuit malfunction<br />

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

sensor - incorrect signal<br />

Heated oxygen sensor (H02S) -<br />

rangelperformance problem<br />

Throttle position (TP) sensor - defective<br />

Knock sensor (KS) 1 - defective<br />

Injector(s), cyl. I, 3, 5 & 7, 9, 11 - circuit<br />

malfunction<br />

Camshaft position (CMP) sensor -<br />

rangelperformance problem<br />

Injector(s), cyl. 2, 4, 6 & 8, 10, 12 - circuit<br />

malfunction<br />

Engine control module (ECM) - unused output<br />

stage<br />

Intake manifold air control solenoid - circuit<br />

malfunction<br />

Engine control module (ECM) - unused output<br />

stage<br />

23 I Oxygen sensor heater relav - malfunction I Wiring, connector, oxyqen sensor heater relay<br />

23<br />

24<br />

24<br />

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

Engine control module (ECM)/transmasion control<br />

module (TCM) communication<br />

Ignition crcuit, cyl. 3 - defective<br />

I<br />

-<br />

Wiring, connector(s), ISC actuatorllAC valve<br />

Wiring, injector(s)<br />

Wiring, injector(s)<br />

Wiring, injector<br />

Wiring, injector<br />

Wiring, connector(s), EVAP canister purge valve<br />

Wiring, injector<br />

Wiring, injector(s)<br />

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

Wiring, intakelexhaust leak, fuel level low, fuel pressure,<br />

evaporative emission (EVAP) canister purge valve,<br />

injector@), ECM<br />

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

Wiring, connector, KS incorrectly tightened, KS<br />

Wiring, injector@)<br />

Wiring, CMP sensor<br />

Wiring, injector(s)<br />

Wiring short to earthlpositive, ignore flash code if terminal<br />

18 not connected<br />

Wiring, connector, intake manifold air control solenoid<br />

Wiring short to earthlpositive, ignore flash code if terminal<br />

18 not connected<br />

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

Wiring short to earth, TCM trouble code@) stored<br />

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

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

-

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