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Trouble Godes - diagramas.diagram...

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Engine management<br />

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

Flash type<br />

Fault location<br />

Model: 240 2,012,3 740 2,012,3 7401760 2,012,3 Turbo 850 2,012,5<br />

940 2,OITurbo 9401960 2,012,3ITurbo 940 2,3 LPT<br />

Probable cause<br />

No fault found<br />

-<br />

Engine control module (ECM)<br />

ECM<br />

Fuel trim (FT) - too weaklrich<br />

Intake leaklblockage, excessive fuel in engine oil,<br />

fuel pressure, wiring, MAF sensor, H02S<br />

Fuel trim (FT) - too weak Intake leak, fuel pressure low, wiring, MAF sensor,<br />

H02S<br />

Mass air flow (MAF) sensor<br />

Wiring, MAF sensor<br />

Engine coolant temperature (ECT) sensor Wiring, ECT sensor<br />

Ignition control module (ICM) - engine RPM signal Wiring<br />

Engine speed (RPM) sensor - no signal Wiring, air gap, RPM sensor<br />

-<br />

--<br />

Engine control module (ECM) - supply voltage lowlhigh Battery, alternator<br />

Throttle position (TP) switch - CTP contacts<br />

TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

lgnition control module (ICM) ICM<br />

Knock sensor (KS) 1 Wiring, KS<br />

Engine control module (ECM) - load signal Wiring, ECM<br />

Exhaust gas recirculation (EGR) system - excessive flow Wiring, EGR valve, EGR control module, engine<br />

detected<br />

coolant thermostat<br />

Heated oxygen sensor (H02S)<br />

Wiring, heating inoperative, MAF sensor, H02S<br />

Throttle position (TP) switch - WOT contacts<br />

TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

Engine speed (RPM) sensor - intermittent signal Wiring, flywheelldrive plate damaged, air gap,<br />

RPM sensor<br />

Fuel trim (FT), part load - too weak lntakelexhaust leak, fuel pressure, wiring,<br />

MAF sensor, H02S<br />

Idle air control (IAC) valve Wiring, IAC valve<br />

Engine coolant temperature (ECT) sensor Wiring, ECT sensor<br />

Fuel trim (FT), part load - too weakkich lntakelexhaust leak, fuel pressure, excessive fuel in<br />

engine oil, injector(s), EVAP canister purge valve,<br />

wiring, MAF sensor, ECT sensor, H02S<br />

Fuel trim (FT), part load - too rich Fuel pressure high, excessive fuel in engine oil,<br />

injector(s), EVAP canister purge valve, wiring,<br />

MAF sensor, ECT sensor, H02S<br />

Fuel trim (FT), idling - weak/rich lntakelexhaust leak, fuel pressure, excessive fuel in<br />

engine oil, injector(s), EVAP canister purge valve,<br />

wiring, MAF sensor, ECT sensor, H02S<br />

Throttle position (TP) switch - CTP contacts TP switch adjustment, accelerator cable adjustment,<br />

wiring, TP switch<br />

Exhaust gas recirculation (EGR) system - insufficient Hose leaklblockage, wiring, EGR valve, EGR control<br />

flow detected<br />

module, EGRT sensor, engine coolant thermostat<br />

Turbocharger (TC) wastegate regulating valve<br />

Wiring, TC wastegate regulating valve<br />

Vehicle speed sensor (VSS)<br />

Wiring, speedometer, VSS<br />

lgnition control module (ICM) - KS signal missing Wiring, ICM<br />

Camshaft position (CMP) sensor - nolincorrect signal Wiring, CMP sensor<br />

Mass air flow (MAF) sensor - no filament burn-off s~gnal Wiring, ECM

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