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Trouble Godes - diagramas.diagram...

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Mel: 440/460/ VOLVO<br />

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

Flash type<br />

Fault locattbn<br />

No fault found<br />

Engine control module (ECM)<br />

lnjector(s) - faulty sianai<br />

Manifold absolute pressure (MAP) sensor - signal error<br />

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

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

Battery voltage<br />

Knock sensor (KS) - signal errorlsignal absent<br />

Mixture adjustment resistor - B18EP<br />

Heated oxygen sensor (H02S) - signal emr/signal<br />

absent<br />

Crankshaft position (CKP) sensor - early models<br />

Engine control relay - no voltage to ECM pin 20<br />

Idle air control (IAC) valve, MPt - signal em/signal<br />

absent<br />

Idle speed control (ISC) actuator, TBI - signal emr/signel<br />

absent<br />

Heated oxygen sensor (H02S) - signal emr, part load<br />

range<br />

Heated oxygen sensor (H02S) - signal error, idting<br />

Throttle position (TP) sensor - signal error<br />

Knock sensor (KS) - ignition control limit reached<br />

Vehicle speed sensor (VSS)<br />

Throttle position (TP) sensor - signal error<br />

ThroMe position (TP) sensor - signal to multi-function<br />

control module<br />

Probable cause<br />

Engine management<br />

/Autodata aEng~ne management 793<br />

-<br />

ECM<br />

Wiring open circuit<br />

Wiring, vacuum hose blockedlsplit, MAP sensor<br />

Wiring, IAT sensor<br />

Wiring, ECT sensor<br />

Wiring, engine control relay, alternator, battery<br />

Wiring, KS<br />

Wiring openlshort circuit, mixture adjustment<br />

resistor<br />

Wiring, fuses, oxygen sensor heater, injector(s),<br />

fuel pressure<br />

Wiring, CKP sensor<br />

Wiring, engine control relay, ECM<br />

Wiring shotdopen circuit<br />

Wiring shotdopen circuit<br />

Wiring, fuses, oxygen sensor heater, injector(s),<br />

fuel pressure<br />

Wiring, fuses, oxygen sensor heater, injectorts),<br />

fuel pressure<br />

Wiring, accelerator cable adjustment, TP sensor,<br />

ECM<br />

Wiring, KS, fuel quality, combustion fault<br />

Wiring, VSS<br />

Wiring, accelerator cable adjustment, TP sensor,<br />

ECM<br />

Wiring, TP sensor, ECM<br />

ca

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