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Trouble Godes - diagramas.diagram...

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Model: Cherokee 2,514,O Grand Cherokee 4,015,215,9 Wrangler 2,514,O<br />

Hex type Fault location<br />

Probable cause<br />

lnjector 4 - circuit malfunction<br />

Heated oxygen sensor (H02S) 1, bank 1 - high voltage<br />

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

Injector 5 - circuit malfunction<br />

lnjector 6 - circuit malfunction<br />

--<br />

Engine management/transmission 1-1<br />

Wiring, injector<br />

Wiring short circuit to positive, fuel pressure, injector<br />

control, EVAP canister purge valve, air filter blocked,<br />

H02S<br />

Wiring, injector<br />

Wiring, injector<br />

Transmission fluid temperature (TFT) sensor - low input Wiring short circuit to earth, TFT sensor, ECM<br />

Transmission fluid temperature (TFT) sensor - high<br />

input<br />

lnjector 7 - circuit malfunction<br />

lnjector 8 - circuit malfunction<br />

Cruise control<br />

Wiring short circuit to positive, TFT sensor, ECM<br />

Wiring, injector<br />

Wiring, injector<br />

Wiring, cruise control vacuum switching valve<br />

Cruise control master switch - high voltage Wiring, cruise control master switch<br />

Cruise control master switch - low voltage Wiring, cruise control master switch<br />

Fuel pump relay<br />

Heated oxygen sensor (H02S) 1, bank 1 - slow<br />

response<br />

Heated oxygen sensor (H02S) 1, bank 1 -<br />

heater control - circuit malfunction<br />

Heated oxygen sensor (H02S) 2, bank 1, heater<br />

control - circuit malfunction<br />

- -- - --<br />

Wiring open circuitlshort circuit, fuel pump relay<br />

Wiring, heating inoperative, H02S<br />

Wiring, H02S<br />

Wiring, H02S<br />

Random/multiple cylinder(s) - misfire detected Wiring, spark plug(s), HT lead(s), injector(s), ignition<br />

coil(s), low compression<br />

Cylinder 1 - misfire detected Wiring, engine mechanical fault, ignitionlfuel system,<br />

injector<br />

Cylinder 2 - misfire detected Wiring, engine mechanical fault, ignitionlfuel system,<br />

injector<br />

Cylinder 3 - misfire detected Wiring, engine mechanical fault, ignitionlfuel system,<br />

injector<br />

Cylinder 4 - misfire detected Wiring, engine mechanical fault, ignitionlfuel system,<br />

injector<br />

Catalytic converter system, bank 1 - efficiency below<br />

threshold<br />

Evaporative emission (EVAP) system - incorrect flow<br />

detected<br />

Parklneutral position (PNP) switch - input circuit<br />

malfunction<br />

Wiring, H02S 2, catalytic converter<br />

Hose connection(s), intake leak, EVAP canister purge<br />

valve<br />

Wiring, PNP switch, ECMITCM<br />

System too rich Wiring, intake blocked, EVAP canister purge valve,<br />

fuel pressure, EGR system, injector(s), air filter<br />

blocked, ignition system, H02S<br />

System too lean Wiring, intakelexhaust leak, MAP sensor,<br />

fuel pressurelpump, EVAP canister purge valve,<br />

injector(s), H02S<br />

Heated oxygen sensor (H02S) 2, bank 1 - high voltage Wiring short circuit to positive, catalytic converter,<br />

H02S

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