Diagnosis Codes 4EFTE/4EFE Diagnosis . - Toyota GT Turbo

Diagnosis Codes 4EFTE/4EFEDiagnosis Codes for the 4EFTE/4EFE engine.4EFET 4efte(turbo)4EFE 4efe(non turbo)cut out disconnected wires(usually check sensor plug)short circuit exposed wires(the positive and the negative) are touching each other- Anything within “{ }” is my added interpretation.- Oh and the term “goes off” means the check engine light code will turn on in the dashboard .Much thanx to Atsuka Chiga &Carl Simmonsfor help with the translation.Enjoy ,Kene- www.tercelonline.comCode #Diagnosis itemDiagnosis contentCheck/inspection/service[Terminal code/sign]① diagnosis condition-parts/regions② abnormalitystate/situation③ time of abnormality④ other12Turn Signal System 1① During cranking[NE, G1 (4E-FET) ]② G1 or NE signal connecter (G,NEaren’t on/{or being}input③ {For} More than 5signal system) Distributor Engine controlseconds13Turn Signal system 2[NE]① Engine revolutioncomputer times-more than1500 rpm{This code② NE signal isn’ton/inputWire Harness andconnecter only occurs at thisrpm or higher}Wire harness and11A, Distributor,(NE?) Engine Controlcomputer

③ {For} More than 1second14ignition signal system① During Idling[IGF, IGT]② Though IGT signalis on/ {or being} Wire harnessand connecter(Igniter B system)input, IGF is noton/{or being} input.③ {For} More than 1 Igniter, ignition coil Engine controlsecond16ECT, CPU system① IG switch is on[4E-FET A/T]② ETC, CPUcomputer Engine controlcomputerabnormality③ {For}More than 1second21O2 sensor signal system[4x]① After warming upthe engine, the O2 sensor Engine controlengine revolutioncomputertimes{are}-morethan 2500 rpm{Thiscode only occurs atthis rpm or higher}② O2 sensor-outputvoltage/pressure/tension is under0.3{volts}③ {For}More than 5secondsO2 sensor heater① IG switch is onabnormality② O2 sensor heater[4E-FET] Wire harness andconnecter (O2circuit snapped/sensor heaterparted/cut out-system)③ {For}More than 1 O2 sensor

second Engine controlcomputer22Water temperature① IG switch is onsignal system② Water temperature[THW,E2] connecter (watersignal systemtemperature sensorcircuit issystem)short-circuit or cut out③ {For} More than 1Water temperaturesensor second24Wire harness andEngine controlcomputerAbsorbing① IG switch is ontemperature signal② Absorbing Temperatureconnectersystem [THA, E2]③ {happens if for} More(absorbing wire harness andthan 5 seconds of sensortemperaturecircuit{the wires aresystem)crossed, or they are disconnected} is shortcircuit or cut outabsorbingtemperature sensor engine controlcomputer25Lean abnormalitysystem [OX]① After warming up the engine, the engineconnecter (O2revolution times-moresensor system)than 2500rpm② O2 sensor doesn’t output O2 sensor Fuel systemrich signal(injector, pressure/stress?)③ More than 60 seconds④Wire harness and2 trips{I guess if for Ignitionanything over 60 sec. thesystem( spark plug,sensor is triggered 2igniter?)times, then this code goes off?}Absorbingtemperature sensor(vacuum sensor) Engine control

computer31Vacuum sensor① IG switch is onsignal system [PIM,② Vacuum sensor circuit isVC,E2] connecter (vacuumshort circuit or cut out ③Wire harness andsensor system)For more than 1 second Vacuum sensor Engine controlcomputer33ISCV system① During idling on[RSO,RSC]② ISCV circuit is short(4E-FE) connecter (ISCVcircuit or cut out ③Wire harness andsystem)For more than 10 ISCVseconds Engine controlcomputer34?②concluding as abnormality,[4E-FTE]practice fuel cut. Wire harness andconnecter (Turbopressure sensor system) Turbo pressure sensor Turbo charger Engine controlcomputer41Throttle position① IG switch is onsensor signal②system③ Wire harness andThrottle position sensorconnecter (throttleis short circuit or cut outposition sensor system){For} More than 5 Throttle position sensorseconds Engine controlcomputer42Speed sensor signalM/T carsystem [SPD,① After warming up the engine,SP2(4E-FET9)]the engine revolutiontimes-2000 5000 and running② Speed sensor signal isn’t input(During test mode, speed signalisn’t input until TE1 is shortcircuit)③ {Code goes off if this is the case Wire harness andconnecter(O2 sensor system)

for} More than 10 secondsA/T car (4E-FE) ①(O2 sensor system)After warming up the engine,Wire harness and connecterthe engine revolutiontimes-more than 2000-3000rpmand during running, the shift isexcept P or N range②Speed sensor signal isn’t input(During test mode, speed signalisn’t input until TE1 is shortcircuit)③{Code goes off if this is the casefor} More than 10 secondsECT car {Electronically Controlled Wireless harness andTransmission-(auto)}(4E-FET)connecter (O2 sensor①system)running by more than 9km/h,the shift is except p or N②SP2 signal is input, but SP1signal is not input③The running distance is morethan about 1 km④432 tripsStarter signal system②During test mode, speed signal is[STA]not input until TE1 is short circuit Wire harness sensor andconnecter (starter signalsystem)51 Engine control computer① During test mode, confirm diag. Neutral start switch system[A/C, IDL(4E-FET)after the engine starts. But IDL A/C switch systemNSW(A/C)]point of diagnosis should be Throttle position sensor IDLSwitch signal system

done more than 3 seconds afterstarting the enginesystem Engine control computer② The shift should be except P orN (A/T car)52Knock sensor signalsystem [KNK] A/T switch is on IDL point off① After warming up the engine, Wire harness andrunning by/with the engineconnecter (O2 sensorrevolution times-1800 5000system)rpm{after warming up engine or driving the engine, this codeEngine controlcomputeronly occurs in this rev range}② Knock sensor system circuit isshort circuit or cut out{faultysensor or bad wires}③ More than 5 seconds{I guessthis code goes off if engine isknocking for more than 5seconds}53Knock (shift?)CPUsystem (4E-FTE)① Running with Engine revolution Enginetimes-500 6000rpm{I guess thiscontrolcode only occurs in this revcomputerrange}② Knock (shift?) CPU abnormality③ {Occurs if} More than 1 second

Diagnosis Codes for the 4EFTE/4EFE engine. 4EFET 4efte(turbo) 4EFE 4efe(non turbo) . - Oh and the term goes off means the check engine light code will turn on in the dashboard. Much thanx to Atsuka Chiga &Carl Simmons for help with the translation. Enjoy , Kene- www.tercelonline.com Code # Diagnosis item [Terminal code/sign] .