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

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Model 316ilCornpact, 318iliSICoupelCornpact, 320i, 3251 (E36) 23 1,8i<br />

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

BMW<br />

P<br />

Engine management<br />

Scanner<br />

type<br />

67<br />

70<br />

73<br />

76<br />

77<br />

78<br />

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

Crankshaft position (CKP) sensorlengine speed<br />

(RPM) sensor - incorrectho signal<br />

Heated oxygen sensor (H02S) - circuit<br />

malfunction<br />

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

Mixture adjustment resistor - signal too lowlhigh<br />

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

Engine coolant temperature (ECT) sensor -<br />

malfunction<br />

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

module communication - malfunction<br />

Engine control module (ECM)lalarm system<br />

control module communication - alarm system<br />

active<br />

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

communication, traction control system (TCS)<br />

Engine control module (ECM), electronic throttle<br />

system (ETS) - overrun torque control<br />

Throttle control, traction control system (TCS) -<br />

defective<br />

Engine control module (ECM) - acceleration skid<br />

control (ASR) defective<br />

Air conditioning (AC) control modulelengine<br />

control module (ECM) communication -<br />

malfunction<br />

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

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

Heated oxygen sensor (H02S) - range1<br />

performance problem<br />

Engine control module (ECM) - internal fault<br />

Ignition circuit - primary circuit<br />

Engine control module (ECM) - acceleration skid<br />

control (ASR)loverrun torque control defective<br />

Knock control circuit - defective<br />

Knock control circuit - rangelperformance<br />

problem<br />

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

active<br />

Engine control module (ECM) - engine cannot be<br />

started<br />

Probable cause<br />

Wiring, CKP sensorlRPM sensor<br />

Wiring, connector(s), H02S<br />

Wiring, instrument panel, VSS<br />

Wiring, mass air flow (MAF) sensor<br />

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

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

Wiring, electrical interference, immobilizer control<br />

module, ECM<br />

Wiring short to positive, alarm system control module<br />

Wiring, ABS trouble code(s) stored, ECM<br />

Wiring short to positive, ECM<br />

Wiring, connector(s), throttle control system<br />

Wiring short to positive, ECM<br />

Wiring, AC control module<br />

Wiring, ECM controlled components<br />

Disconnect ECM multi-plug for at least 10 min. - check if<br />

trouble code reappears before replacing ECM<br />

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

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

injector(s), H02S, ECM<br />

Disconnect ECM multi-plug for at least 10 min. - check if<br />

trouble code reappears before replacing ECM<br />

Wiring, ignition coil(s)<br />

Wiring, trouble code(s) stored in other system(s)<br />

Wiring, connector, knock sensor (KS), ECM<br />

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

knock sensor (KS)<br />

lncorrecffdamaged key, incorrectly coded,<br />

ECMlimmobilizer replacement without coding, wiring,<br />

immobilizer defective<br />

Wiring, engine speed (RPM) sensor, mass air flow (MAF)<br />

sensorlvolume air flow (VAF) sensor, fuel pump relay,<br />

ignition system, injector(s), fuel pressure, throttle control<br />

system<br />

Motronic MI .711.7.2/1.7.3/3.1<br />

Motronic MI .2<br />

Motronic MI .7.3<br />

rn Motronic M3.1<br />

Motronic MI .7.2/1.7.3<br />

Motronic MI .7, V12<br />

/<strong>Autodata</strong> I<br />

Eng~ne management 163

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