ADVANCED ENGINE PERFORMANCE SPECIALIST TEST (L1) COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

Transcription

1 ADVANCED ENGINE PERFORMANCE SPECIALIST TEST (L1) COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET This ooklet is intended only for referene when prepring for nd tking the ASE Advned Engine Performne Speilist Test. The omposite vehile type 3 powertrin ontrol system is sed on designs ommon to mny vehile mnufturers, ut is not identil to ny tul prodution vehile.

2 This pge is left lnk on purpose.

3 GENERAL DESCRIPTION This generi four yle, V6 engine hs four overhed hin-driven mshfts, 24 vlves, distriutorless ignition, nd mss irflow-type losed-loop sequentil multiport fuel injetion system. The Engine Control Module (ECM) reeives input from sensors, lultes ignition nd fuel requirements, nd ontrols engine tutors to provide the desired driveility, fuel eonomy, nd emissions ontrol. The ECM lso ontrols the vehile s hrging system. The powertrin ontrol system hs OBD II-omptile sensors nd dignosti pilities. The ECM reeives power from the ttery nd ignition swith nd provides regulted 5 volt supply for most of the engine sensors. The engine is equipped with single exhust system nd three-wy tlyti onverter, without ny seondry ir injetion. Engine ontrol fetures inlude vrile vlve timing, eletroni throttle tutor ontrol (TAC), dt ommunitions us, vehile nti-theft immoilizer system, nd onord refueling vpor reovery (ORVR) EVAP omponents. The ontrol system softwre nd OBD II dignosti proedures stored in the ECM n e updted using ftory supplied lirtion files nd PC-sed interfe softwre, long with reprogrmming devie or sn tool tht onnets the PC to the vehile s dt link onnetor (DLC). AUTOMATIC TRANSMISSION Four-speed utomti overdrive trnsxle, with shifting ontrolled y trnsmission ontrol module (TCM). The TCM ommunites with the ECM nd other modules through the dt us. The TCM provides its own regulted 5 volt supply, performs ll OBD II trnsxle dignosti routines, nd stores trnsxle dignosti troule odes (DTCs). The ontrol system softwre nd OBD II dignosti proedures stored in the TCM n e updted in the sme wy s the ECM. Filures tht result in pending or onfirmed DTC relted to ny of the following omponents will use the TCM to defult to fil-sfe mode: rnge swith, shift solenoids, turine shft speed sensor, nd the vehile speed sensor. The TCM will lso defult to fil-sfe mode if it is unle to ommunite with the ECM. When in fil-sfe mode, mximum line pressure will e ommnded, the trnsmission will defult to 2 nd ger, nd the torque onverter luth will e disled. FUEL SYSTEM Sequentil Multiport Fuel Injetion (SFI) Returnless Fuel Supply with eletri fuel pump mounted inside the fuel tnk Fuel pressure is regulted to onstnt 50 psi (345 kp) y mehnil regultor in the fuel tnk. Minimum eptle fuel pressure is 45 psi (310 kp). The fuel system should mintin minimum of 45 psi (310 kp) for two minutes fter the engine is turned off. IGNITION SYSTEM Distriutorless Ignition (EI) with six ignition oils (oil-on-plug) Firing Order: Cylinders 1, 3, nd 5 re on Bnk 1, Cylinders 2, 4, nd 6 re on Bnk 2 Ignition timing is not djustle Timing is determined y the ECM using the rnkshft position (CKP) sensor signl The ignition oil drivers re integrted into the ECM VARIABLE VALVE TIMING Intke mshft timing is ontinuously vrile using hydruli tutor tthed to the end of eh intke mshft. Engine oil flow to eh hydruli tutor is ontrolled y mshft position tutor ontrol solenoid. Exhust mshft timing is fixed. ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 1

4 A single timing hin drives oth exhust mshfts nd oth intke mshft hydruli tutors. While vlve overlp is vrile, vlve lift nd durtion re fixed. Cm timing is determined y the ECM using the rnkshft position (CKP) sensor nd mshft position sensor (CMP 1 nd CMP 2) signls. At idle, the intke mshfts re fully retrded nd vlve overlp is zero degrees. At higher speeds nd lods, the intke mshfts n e dvned up to 40 rnkshft degrees. Eh intke mshft hs seprte mshft position sensor, hydruli tutor, nd ontrol solenoid. If little or no oil pressure is reeived y hydruli tutor (typilly t engine strtup, t idle speed, or during fult ondition), it is designed to mehnilly defult to the fully retrded position (zero vlve overlp), nd is held in tht position y spring-loded loking pin. ELECTRONIC THROTTLE CONTROL The vehile does not hve mehnil throttle le, ruise ontrol throttle tutor, or n idle ir ontrol (IAC) vlve. Throttle opening t ll engine speeds nd lods is ontrolled diretly y throttle tutor ontrol (TAC) motor mounted on the throttle ody housing. Dul elertor pedl position (APP) sensors provide input from the vehile opertor, while the tul throttle ngle is determined using dul throttle position (TP) sensors. If one APP sensor or one TP sensor fils, the ECM will turn on the mlfuntion inditor lmp (MIL) nd limit the mximum throttle opening to 35%. If ny two (or more) of the four sensors fil, the ECM will turn on the MIL nd disle the eletroni throttle ontrol. In se of filure of the eletroni throttle ontrol system, the system will defult to limp-in opertion. In limp-in mode, the spring-loded throttle plte will return to defult position of 15% throttle opening, nd the TAC vlue on the sn tool will indite 15%. This defult position will provide fst idle speed of 1400 to 1500 rpm, with no lod nd ll essories off. Norml no-lod idle rnge is 850 to 900 rpm t 5% to 10% throttle opening. No idle relern proedure is required fter omponent replement or ded ttery. DATA COMMUNICATIONS BUS The seril dt us is high-speed, non-fult tolernt, two wire twisted pir ommunitions network. It llows peer-to-peer ommunitions etween vrious eletroni modules, inluding the engine ontrol module (ECM), trnsmission ontrol module (TCM), instrument luster (inluding the MIL), immoilizer ontrol module, nd sn tool onneted to the dt link onnetor (DLC). The Dt-High iruit swithes etween 2.5 (rest stte) nd 3.5 volts (tive stte), nd the Dt- Low iruit swithes etween 2.5 (rest stte) nd 1.5 volts (tive stte). The dt us hs two 120 ohm terminting resistors: one inside the instrument luster, nd nother one inside the ECM. Any of the following onditions will use the dt ommunitions us to fil nd result in the storge of network DTCs: either dt line shorted to power, to ground, or to the other dt line. The dt us will remin opertionl when one of the two modules ontining terminting resistor is not onneted to the network. The dt us will fil when oth terminting resistors re not onneted to the network. Dt ommunition filures do not prevent the ECM from providing ignition nd fuel ontrol. IMMOBILIZER ANTI-THEFT SYSTEM When the ignition swith is turned on, the immoilizer ontrol module sends hllenge signl through the ntenn round the ignition swith to the trnsponder hip in the ignition key. The trnsponder key responds with n enrypted key ode. The immoilizer ontrol module then deodes the key ode nd ompres it to the list of registered keys. When the engine is strted, the ECM sends request to the immoilizer ontrol module over the dt us to verify the key vlidity. If the key is vlid, the immoilizer ontrol module responds with PAGE 2 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

5 vlid key messge to the ECM to ontinue norml engine opertion. If n ttempt is mde to strt the vehile with n invlid ignition key, the immoilizer ontrol module sends messge over the dt us to the instrument luster to flsh the nti-theft inditor lmp. If the ECM does not reeive vlid key messge from the immoilizer ontrol module within 2 seonds of engine strtup, the ECM will disle the fuel injetors to kill the engine. Cyling the key off nd rnking the engine gin will result in engine restrt nd stll. The immoilizer ontrol module nd ECM eh hve their own unique internl ID numers used to enrypt their messges, nd re progrmmed t the ftory to reognize eh other. If either module is repled, the sn tool must e used to progrm the replement module, using the VIN, the dte, nd ftory-ssigned PIN numer. Up to eight keys n e registered in the immoilizer ontrol module. Eh key hs its own unique internl key ode. If only one vlid key is ville, or if ll keys hve een lost, the sn tool n e used to delete lost keys nd register new keys. This proedure lso requires the VIN, the dte, nd ftory-ssigned PIN numer. Neither the ECM, TCM, nor the immoilizer ontrol module prevent opertion of the strter motor for nti-theft purposes. ON-BOARD REFUELING VAPOR RECOVERY (ORVR) EVAP SYSTEM The on-ord refueling vpor reovery EVAP system uses fuel tnk vpors to e direted to the EVAP hrol nister during refueling, so tht HC vpors do not espe into the tmosphere. The following omponents hve een dded to the trditionl EVAP system for ORVR pility: one inh I.D. fill pipe, one-wy hek vlve t the ottom of the fill pipe, fuel vpor ontrol vlve inside the fuel tnk, nd ½ inh I.D. vent hose from the vpor ontrol vlve to the nister. The fuel vpor ontrol vlve hs flot tht rises to sel the vent hose when the fuel tnk is full. It lso prevents liquid fuel from rehing the nister nd loks fuel from leking in the event of vehile roll-over. SENSORS MASS AIRFLOW (MAF) SENSOR Senses irflow into the intke mnifold. The sensor reding vries from 0.2 volts (0 gm/se) t key-on, engine-off, to 4.8 volts (175 gm/se) t mximum irflow. At se level, no-lod idle (850 rpm), the sensor reding is 0.7 volts (2.0 gm/se). Loted on the ir lener housing. MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR Senses intke mnifold solute pressure. The MAP sensor signl is used y the ECM for OBD II dignostis only. The sensor reding vries from 4.5 volts t 0 in. Hg vuum / 101 kp pressure (key on, engine off, t se level), to 0.5 volts t 24 in. Hg vuum / 20.1 kp pressure. At se level, no-lod idle with 18 in. Hg vuum (40.4 kp solute pressure), the sensor reding is 1.5 volts. Loted on the intke mnifold. ENGINE COOLANT TEMPERATURE (ECT) SENSOR A negtive temperture oeffiient (NTC) thermistor tht senses engine oolnt temperture. The sensor vlues rnge from -40 F to 248 F (-40 C to 120 C). At 212 F (100 C), the sensor reding is 0.46 volts. Loted in the engine lok wter jket. INTAKE AIR TEMPERATURE (IAT) SENSOR A negtive temperture oeffiient (NTC) thermistor tht senses ir temperture. The sensor vlues rnge from -40 F to 248 F (-40 C to 120 C). At 86 F (30 C), the sensor reding is 2.6 volts. Loted in the ir lener housing. ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 3

6 CRANKSHAFT POSITION (CKP) SENSOR A mgneti-type sensor tht genertes 35 pulses for eh rnkshft revolution. It is loted on the front engine over, with 35-tooth relutor wheel mounted on the rnkshft just ehind the lner pulley. Eh tooth is ten rnkshft degrees prt, with one spe for Amissing tooth@ loted t 60 degrees efore top ded enter of ylinder numer 1. CAMSHAFT POSITION SENSORS (CMP 1 AND CMP 2) A pir of three-wire solid stte (Hll-effet or optil-type) sensors tht generte signl one per intke mshft revolution. The leding edge of the nk 1 CMP signl ours on the ylinder 1 ompression stroke, nd the leding edge of the nk 2 CMP signl ours on the ylinder 4 ompression stroke. When the intke mshfts re fully retrded (zero vlve overlp), the signls swith t top ded enter of ylinders 1 nd 4. When the intke mshfts re fully dvned (mximum vlve overlp), the signls swith t 40 rnkshft degrees efore top ded enter. These signls llow the ECM to determine fuel injetor nd ignition oil sequene, s well s the tul intke vlve timing. Loss of one CMP signl will set DTC, nd vlve timing will e held t the fully retrded position (zero vlve overlp). If neither CMP signl is deteted during rnking, the ECM will store DTC nd disle the fuel injetors, resulting in no-strt ondition. Loted t the rer of eh vlve over, with n interrupter mounted on the intke mshfts to generte the signl. The following digrm shows the CKP nd CMP sensor signl wveforms with the mshfts t the defult (fully retrded) position. THROTTLE POSITION (TP 1 AND TP 2) SENSORS A pir of redundnt non-djustle potentiometers tht sense throttle position. The TP 1 sensor signl vries from 4.5 volts t losed throttle to 0.5 volts t mximum throttle opening (deresing voltge with inresing throttle position). The TP 2 sensor signl vries from 0.5 volts t losed throttle to 4.5 volts t mximum throttle opening (inresing voltge with inresing throttle position). Filure of one TP sensor will set DTC nd the ECM will limit the mximum throttle opening to 35%. Filure of oth TP sensors will set DTC nd use the throttle tutor ontrol to e disled, nd the spring-loded throttle plte will return to the defult 15% position (fst idle). Loted on the throttle ody. PAGE 4 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

7 ACCELERATOR PEDAL POSITION (APP 1 AND APP 2) SENSORS A pir of redundnt non-djustle potentiometers tht sense elertor pedl position. The APP 1 sensor signl vries from 0.5 volts t the relesed pedl position to 3.5 volts t mximum pedl depression (inresing voltge with inresing pedl position). The APP 2 sensor signl vries from 1.5 volts t the relesed pedl position to 4.5 volts t mximum pedl depression (inresing voltge with inresing pedl position, offset from the APP 1 sensor signl y 1.0 volt). The ECM interprets n elertor pedl position of 80% or greter s request for wide open throttle. Filure of one APP sensor will set DTC nd the ECM will limit the mximum throttle opening to 35%. Filure of oth APP sensors will set DTC nd use the throttle tutor ontrol to e disled, nd the spring-loded throttle plte will return to the defult 15% position (fst idle). Loted on the elertor pedl ssemly. EGR VALVE POSITION SENSOR A three-wire non-djustle potentiometer tht senses the position of the EGR vlve pintle. The sensor reding vries from 0.50 volts when the vlve is fully losed to 4.50 volts when the vlve is fully opened. Loted on top of the EGR vlve. KNOCK SENSOR A two-wire piezoeletri sensor tht genertes n AC voltge spike when engine virtions within speified frequeny rnge re present, inditing sprk knok. The signl is used y the ECM to retrd ignition timing when sprk knok is deteted. The sensor signl iruit normlly mesures 2.5 volts DC with the sensor onneted. Loted in the engine lok. HEATED OXYGEN SENSORS (HO2S 1/1, HO2S 2/1, AND HO2S 1/2) Eletrilly heted zironi sensors tht mesure oxygen ontent in the exhust strem. Sensor 1/1 is loted on the Bnk 1 exhust mnifold (ylinders 1, 3 nd 5). Sensor 2/1 is loted on the Bnk 2 exhust mnifold (ylinders 2, 4, nd 6). Both upstrem sensor signls re used for losed loop fuel ontrol nd OBD II monitoring. Sensor 1/2 is mounted in the exhust pipe fter the tlyti onverter (downstrem). Its signl is used for OBD II monitoring of tlyti onverter opertion. The sensor outputs vry from 0.0 to 1.0 volt. When sensor reding is less thn 0.45 volts, oxygen ontent round the sensor is high; when sensor reding is more thn 0.45 volts, oxygen ontent round the sensor is low. No is voltge is pplied to the sensor signl iruits y the ECM. With the key on nd engine off, the sensor redings re zero volts. Bttery voltge is ontinuously supplied to the oxygen sensor heters whenever the ignition swith is on. The ECM will provide the ground for oth of the upstrem oxygen sensor heters s soon s the engine strts. One the engine is strted, the ECM will then provide the ground for the downstrem oxygen sensor heter fter two minutes of ontinuous engine opertion. POWER STEERING PRESSURE (PSP) SWITCH A swith tht loses when high pressure is deteted in the power steering system. The signl is used y the ECM to djust throttle position to ompenste for the dded engine lod from the power steering pump. Loted on the P/S high pressure hose. BRAKE PEDAL POSITION (BPP) SWITCH A swith tht loses when the rke pedl is depressed (rkes pplied). The signl is used y the TCM to relese the torque onverter luth. Loted on the rke pedl. ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 5

8 A/C ON/OFF REQUEST SWITCH A swith tht is losed y the vehile opertor to request A/C ompressor opertion. Loted in the limte ontrol unit on the instrument pnel. A/C PRESSURE SENSOR A three-wire solid-stte sensor for A/C system high-side pressure. The sensor reding vries from 0.25 volts t 25 psi to 4.50 volts t 450 psi. The signl is used y the ECM to ontrol the A/C ompressor luth, rditor fn, nd to djust throttle position to ompenste for the dded engine lod from the A/C ompressor. The ECM will lso disle ompressor opertion if the pressure is elow 40 psi or ove 420 psi. Loted on the A/C high side vpor line. FUEL LEVEL SENSOR A potentiometer tht is used to determine the fuel level. The reding vries from 0.5 volts / 0% with n empty tnk to 4.5 volts / 100% with full tnk. When the fuel tnk is ¼ full, the sensor reding is 1.5 volts. When the fuel tnk is ¾ full, the sensor reding is 3.5 volts. Used y the ECM when testing the evportive emission (EVAP) system. Loted in the fuel tnk. FUEL TANK (EVAP) PRESSURE SENSOR Senses vpor pressure or vuum in the evportive emission (EVAP) system ompred to tmospheri pressure. The sensor reding vries from 0.5 volts t 1/2 psi (14 in. H 2 O) vuum to 4.5 volts t 1/2 psi (14 in. H 2 O) pressure. With no pressure or vuum in the fuel tnk (gs p removed), the sensor output is 2.5 volts. Used y the ECM for OBD II evportive emission system dignostis only. Loted on top of the fuel tnk. VEHICLE SPEED SENSOR (VSS) A mgneti-type sensor tht senses rottion of the finl drive nd genertes signl tht inreses in frequeny s vehile speed inreses. The TCM uses the VSS signl to ontrol upshifts, downshifts, nd the torque onverter luth. The TCM ommunites the VSS signl over the dt ommunitions us to the ECM to ontrol high-speed fuel utoff, nd to the Instrument Cluster for speedometer opertion. The signl is displyed on the sn tool in miles per hour nd kilometers per hour. Loted on the trnsxle housing. TRANSMISSION FLUID TEMPERATURE (TFT) SENSOR A negtive temperture oeffiient (NTC) thermistor tht senses trnsmission fluid temperture. The sensor vlues rnge from -40 F to 248 F (-40 C to 120 C). At 212 F (100 C), the sensor reding is 0.46 volts. This signl is used y the TCM to dely shifting when the fluid is old, nd ontrol torque onverter luth opertion when the fluid is hot. Loted in the trnsxle oil pn. TRANSMISSION TURBINE SHAFT SPEED (TSS) SENSOR A mgneti-type sensor tht senses rottion of the torque onverter turine shft (input / minshft) nd genertes signl tht inreses in frequeny s trnsmission input speed inreses. Used y the TCM to ontrol torque onverter luth opertion nd sense trnsmission slippge. Loted on the trnsxle housing. TRANSMISSION RANGE (TR) SWITCH A six-position swith tht indites the position of the trnsxle mnul selet lever: Prk/Neutrl, Reverse, Mnul Low (1), Seond (2), Drive (3), or Overdrive (OD). Used y the TCM to ontrol line pressure, upshifting, nd downshifting. The TR swith is NOT used to enle or disle strter motor opertion. Loted on the trnsxle housing. PAGE 6 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

9 ACTUATORS FAN CONTROL (FC) RELAY When energized, provides ttery voltge (B+) to the rditor/ondenser ooling fn motor. The ECM will turn the fn on when engine oolnt temperture rehes 210 F (99 C) nd off when oolnt temperture drops to 195 F (90 C). The ECM will lso turn the fn on when the A/C high side pressure rehes 300 psi nd off when the pressure drops to 250 psi. The rely oil resistne spe is 48 ± 6 ohms. FUEL PUMP (FP) RELAY When energized, supplies ttery voltge (B+) to the fuel pump. The rely oil resistne spe is 48 ± 6 ohms. A/C CLUTCH RELAY When energized, provides ttery voltge (B+) to the A/C ompressor luth oil. The rely oil resistne spe is 48 ± 6 ohms. THROTTLE ACTUATOR CONTROL (TAC) MOTOR A idiretionl pulse-width modulted DC motor tht ontrols the position of the throttle plte. A sn tool dt vlue of 0% indites n ECM ommnd to fully lose throttle plte, nd vlue of 100% indites n ECM ommnd to fully open the throttle plte (wide open throttle). Any throttle ontrol tutor motor iruit fult will set DTC nd use the throttle tutor ontrol to e disled, nd the spring-loded throttle plte will return to the defult 15% position (fst idle). When disled, the TAC vlue on the sn tool will indite 15%. MALFUNCTION INDICATOR LAMP (MIL) The MIL is prt of the instrument luster nd reeives ommnds from the ECM nd TCM over the dt ommunitions us. If the instrument luster fils to ommunite with the ECM nd TCM, the MIL is ontinuously lit y defult. Under norml onditions, when the ignition swith is turned on the lmp remins lit for 15 seonds for ul hek. Afterwrd, the MIL will light only for emissions relted onerns. Whenever n engine misfire severe enough to dmge the tlyti onverter is deteted, the MIL will flsh on nd off. CAMSHAFT POSITION ACTUATOR CONTROL SOLENOIDS A pir of duty yle ontrolled solenoid vlves tht inrese or derese timing dvne of the intke mshfts y ontrolling engine oil flow to the mshft position tutors. When the duty yle is greter thn 50%, the oil flow from the solenoid uses the tutor to dvne the mshft position. When the duty yle is less thn 50%, the oil flow from the solenoid uses the tutor to retrd the mshft position. When the ECM determines tht the desired mshft position hs een hieved, the duty yle is ommnded to 50% to hold the tutor so tht the djusted mshft position is mintined. The solenoid winding resistne spe is 12 ± 2 ohms. EXHAUST GAS RECIRCULATION (EGR) VALVE A duty yle ontrolled solenoid tht, when energized, lifts the spring-loded EGR vlve pintle to open the vlve. A vlue of 0% indites n ECM ommnd to fully lose the EGR vlve, nd vlue of 100% indites n ECM ommnd to fully open the EGR vlve. The solenoid is enled when the engine oolnt temperture rehes 150 F (66 C) nd the throttle is not losed or wide open. The solenoid winding resistne spe is 12 ± 2 ohms. ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 7

10 FUEL INJECTORS Eletro-mehnil devies used to deliver fuel to the intke mnifold t eh ylinder. Eh injetor is individully energized one per mshft revolution, in time with its ylinder s intke stroke. The injetor winding resistne spe is 12 ± 2 ohms. IGNITION COILS These six oils, mounted ove the sprk plugs, generte high voltge to rete sprk t eh ylinder individully. Timing nd dwell re ontrolled y the ECM. The oil primry resistne spe is 1 ±.5 ohms. The oil seondry resistne spe is 10K ± 2K ohms. GENERATOR FIELD The ECM supplies this vrile-duty yle signl to ground the field winding of the genertor (lterntor), without the use of seprte voltge regultor. Inresing the duty yle results in higher field urrent nd greter genertor (lterntor) output. EVAPORATIVE EMISSION (EVAP) CANISTER PURGE SOLENOID A duty yle ontrolled solenoid tht regultes the flow of vpors stored in the nister to the intke mnifold. The solenoid is enled when the engine oolnt temperture rehes 150 F (66 C). A duty yle of 0% loks vpor flow, nd duty yle of 100% llows mximum vpor flow. The duty yle is determined y the ECM, sed on engine speed nd lod. The solenoid is lso used for OBD II testing of the evportive emission (EVAP) system. The solenoid winding resistne spe is 48 ± 6 ohms. There is lso servie port with shrder vlve nd p instlled on the hose etween the purge solenoid nd the nister. EVAPORATIVE EMISSION (EVAP) CANISTER VENT SOLENOID When energized, the fresh ir supply hose to the nister is loked. The solenoid is only energized for OBD II testing of the evportive emission (EVAP) system. The solenoid winding resistne spe is 48 ± 6 ohms. TORQUE CONVERTER CLUTCH (TCC) SOLENOID VALVE A duty yle ontrolled solenoid vlve tht pplies the torque onverter luth y redireting hydruli pressure in the trnsxle. With duty yle of 0%, the TCC is relesed. When torque onverter luth pplition is desired, the pulse width is inresed until the luth is fully pplied. The solenoid will then mintin 100% duty yle until luth disenggement is ommnded. Then the pulse width is deresed k to 0%. If the rke pedl position swith loses, the duty yle is ut to 0% immeditely. The solenoid is enled when the engine oolnt temperture rehes 150 F (66 C), the rke swith is open, the trnsmission is in 3rd or 4th ger, nd the vehile is t ruise (stedy throttle) ove 40 mph. In ddition, whenever the trnsmission fluid temperture is 248 F (120 C) or more, the TCM will ommnd TCC lokup. The solenoid winding resistne spe is 12 ± 2 ohms. TRANSMISSION PRESSURE CONTROL (PC) SOLENOID This duty yle ontrolled solenoid ontrols fluid in the trnsmission vlve ody tht is routed to the pressure regultor vlve. By vrying the duty yle of the solenoid, the TCM n vry the line pressure of the trnsmission to ontrol shift feel nd slippge. When the duty yle is minimum (10%), the line pressure will e mximized. When the duty yle is mximum (90%), the line pressure will e minimized. The solenoid winding resistne spe is 6 ± 1 ohms. PAGE 8 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

11 TRANSMISSION SHIFT SOLENOIDS (SS 1 AND SS 2) These solenoids ontrol fluid in the trnsmission vlve ody tht is routed to the 1-2, 2-3, nd 3-4 shift vlves. By energizing or de-energizing the solenoids, the TCM n enle ger hnge. The solenoid winding resistne spe is 24 ± 4 ohms. Ger SS 1 SS 2 P, N, R, or 1 On Off 2 Off Off 3 Off On 4 (OD) On On SFI SYSTEM OPERATION AND COMPONENT FUNCTIONS STARTING MODE When the ignition swith is turned on, the ECM energizes the fuel pump rely for 2 seonds, llowing the fuel pump to uild up pressure in the fuel system. Unless the engine is rnked within this two-seond period, the fuel pump rely is de-energized to turn off the pump. The fuel pump rely will remin energized s long s the engine speed (CKP) signl to the ECM is 100 rpm or more. CLEAR FLOOD MODE When the elertor pedl is fully depressed (pedl position of 80% or greter) nd the engine speed is elow 400 rpm, the ECM turns off the fuel injetors. RUN MODE: OPEN AND CLOSED LOOP OPEN LOOP When the engine is first strted nd running ove 400 rpm, the system opertes in open loop. In open loop, the ECM does not use the oxygen sensor signls. Insted, it lultes the fuel injetor pulse width from the throttle position sensors, the oolnt nd intke ir temperture sensors, the MAF sensor, nd the CKP sensor. The system will sty in open loop until ll of these onditions re met: Both upstrem heted oxygen sensors (HO2S 1/1 nd HO2S 2/1) re sending vrying signls to the ECM. The engine oolnt temperture is ove 68 F (20 C). Ten seonds hve elpsed sine strt-up. Throttle position is less thn 80%. ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 9

12 CLOSED LOOP When the oxygen sensor, engine oolnt temperture sensor, nd time onditions re met, nd the throttle opening is less thn 80%, the system goes into losed loop. Closed loop mens tht the ECM djusts the fuel injetor pulse widths for Bnk 1 nd Bnk 2 sed on the vrying voltge signls from the upstrem oxygen sensors. An oxygen sensor signl elow 0.45 volts uses the ECM to inrese injetor pulse width. When the oxygen sensor signl rises ove 0.45 volts in response to the riher mixture, the ECM redues injetor pulse width. This feedk trims the fuel ontrol progrm tht is sed on the other sensor signls. ACCELERATION ENRICHMENT MODE During elertion, the ECM uses the inrese in mss irflow nd the rte of hnge in throttle position to lulte inresed fuel injetor pulse width. During wide open throttle opertion, the ontrol system goes into open loop mode. DECELERATION ENLEANMENT MODE During deelertion, the ECM uses the derese in mss irflow, the vehile speed vlue, nd the rte of hnge in throttle position to lulte deresed fuel injetor pulse width. FUEL CUT-OFF MODE The ECM will turn off the fuel injetors, for sfety resons, when the vehile speed rehes 110 mph, or if the engine speed exeeds 6000 rpm. OBD II SYSTEM OPERATION COMPREHENSIVE COMPONENT MONITOR The OBD II dignosti system ontinuously monitors ll engine nd trnsmission sensors nd tutors for shorts, opens, nd out-of-rnge vlues, s well s vlues tht do not logilly fit with other powertrin dt (rtionlity). On the first trip during whih the Comprehensive Component Monitor detets filure tht will result in emissions exeeding predetermined level, the ECM or TCM will store dignosti troule ode (DTC), illuminte the mlfuntion inditor lmp (MIL), nd store freeze frme. SYSTEM MONITORS The OBD II dignosti system lso tively tests some systems for proper opertion while the vehile is eing driven. Fuel ontrol nd engine misfire re heked ontinuously. Oxygen sensor response, oxygen sensor heter opertion, tlyst effiieny, EGR opertion, EVAP integrity, vrile vlve timing, nd thermostt opertion re tested one or more per trip. When ny of the System Monitors detets filure tht will result in emissions exeeding predetermined level on two onseutive trips, the ECM will store dignosti troule ode (DTC) nd illuminte the mlfuntion inditor lmp (MIL). Freeze frme dt ptured during the first of the two onseutive filures is lso stored. Fuel Control - This monitor will set DTC if the system fils to enter Closed Loop mode within 5 minutes of strtup, or the Long Term Fuel Trim is exessively high or low nytime fter the engine is wrmed up, inditing the loss of fuel ontrol. This is lwys the se when the Long Term Fuel Trim rehes its limit (+30% or -30%). Engine Misfire - This monitor uses the CKP sensor signl to ontinuously detet engine misfires, oth severe nd non-severe. If the misfire is severe enough to use tlyti onverter dmge, the MIL will link s long s the severe misfire is deteted. PAGE 10 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

13 Oxygen Sensors - This monitor heks the mximum nd minimum output voltge, s well s swithing nd response times for ll oxygen sensors. If n oxygen sensor signl remins too low or too high, swithes too slowly, or not t ll, DTC is set. Oxygen Sensor Heters - This monitor heks the urrent flow through eh oxygen sensor heter. If the urrent flow is too high or too low, DTC is set. Bttery voltge is ontinuously supplied to the oxygen sensor heters whenever the ignition swith is on. The heters re grounded through the ECM. Ctlyti Converter - This monitor ompres the signls of the two upstrem heted oxygen sensors to the signl from the downstrem heted oxygen sensor to determine the ility of tlyst to store free oxygen. If the tlyst's oxygen storge pity is suffiiently degrded, DTC is set. This monitor will only run fter the oxygen sensor heter nd oxygen sensor monitors hve run nd pssed for ll three oxygen sensors. EGR System - This monitor uses the MAP sensor signl to detet hnges in intke mnifold pressure s the EGR vlve is ommnded open nd losed. If the pressure hnges too little or too muh, DTC is set. EVAP System - This monitor first turns on the EVAP vent solenoid to lok the fresh ir supply to the EVAP nister. Next, the EVAP purge solenoid is turned on to drw slight vuum on the entire EVAP system, inluding the fuel tnk. Then the EVAP purge solenoid is turned off to sel the system. The monitor uses the Fuel Tnk (EVAP) Pressure Sensor signl to determine if the EVAP system hs ny leks. After the lek testing is ompleted, the EVAP vent solenoid is turned off to relieve the vuum. If suffiient vuum is not reted, or deys too rpidly, or does not dey quikly t the onlusion of the lek test, DTC is set. In order to run this monitor, the engine must e old (elow 86 F / 30 C) nd the fuel level must e etween ¼ nd ¾ full. Vrile Vlve Timing - This monitor ompres the desired vlve timing with the tul timing indited y the CMP sensors. If the timing is in error, or tkes too long to reh the desired vlue, DTC is set. Engine Thermostt - This monitor onfirms tht the engine wrms up fully within resonle mount of time. If the oolnt temperture remins too low for too long, DTC is set. MONITOR READINESS STATUS The monitor rediness sttus indites whether or not prtiulr OBD II dignosti monitor hs een run sine the lst time tht DTCs were lered from ECM nd TCM memory. If the monitor hs not yet run, the sttus will disply on the Sn Tool s Not Complete. If the monitor hs een run, the sttus will disply on the sn tool s Complete. This does not men tht no fults were found, only tht the dignosti monitor hs een run. Whenever DTCs re lered from memory or the ttery is disonneted, ll monitor rediness sttus inditors re reset to Not Complete. Monitor rediness sttus inditors re not needed for the Comprehensive Component, Fuel Control, nd Engine Misfire monitors euse they run ontinuously. The rediness sttus of the following system monitors n e red on the sn tool: Oxygen Sensors Oxygen Sensor Heters Ctlyti Converter EGR System EVAP System Vrile Vlve Timing Engine Thermostt ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 11

14 WARM UP CYCLE Wrm Up Cyles re used y the ECM nd TCM for utomti lering of DTCs nd Freeze Frme dt s desried elow. To omplete one wrm up yle, the engine oolnt temperture must rise t lest 40 F (22 C) nd reh minimum of 160 F (71 C). TRIP A trip is key-on yle in whih ll enle riteri for prtiulr dignosti monitor re met nd the dignosti monitor is run. The trip is ompleted when the ignition swith is turned off. DRIVE CYCLE Most OBD II dignosti monitors will run t some time during norml opertion of the vehile. However, to stisfy ll of the different Trip enle riteri nd run ll of the OBD II dignosti monitors, the vehile must e driven under vriety of onditions. The following drive yle will llow ll monitors to run on this vehile. 1. Ensure tht the fuel tnk is etween ¼ nd ¾ full. 2. Strt old (elow 86 F / 30 C) nd wrm up until engine oolnt temperture is t lest 160 F (71 C). 3. Aelerte to mph t 25% throttle nd mintin speed for five minutes. 4. Deelerte without using the rke (ost down) to 20 mph or less, nd then stop the vehile. Allow the engine to idle for 10 seonds, turn the key off, nd wit one minute. 5. Restrt nd elerte to mph t 25% throttle nd mintin speed for two minutes. 6. Deelerte without using the rke (ost down) to 20 mph or less, nd then stop the vehile. Allow the engine to idle for 10 seonds, turn the key off, nd wit one minute. FREEZE FRAME DATA A Freeze Frme is miniture snpshot (one frme of dt) tht is utomtilly stored in the ECM/TCM memory when n emissions-relted DTC is first stored. If DTC for fuel ontrol or engine misfire is stored t lter time, the newest dt re stored nd the erlier dt is lost. All prmeter ID (PID) vlues listed under Sn Tool Dt re stored in freeze frme dt. The ECM/TCM stores only one single freeze frme reord. STORING AND CLEARING DTCS & FREEZE FRAME DATA, TURNING THE MIL ON & OFF One Trip Monitors: A filure on the first trip of one trip emissions dignosti monitor uses the ECM or TCM to immeditely store onfirmed DTC nd Freeze Frme dt, nd turn on the MIL. All Comprehensive Component Monitor fults set onfirmed DTC on one trip. Two Trip Monitors: A filure on the first trip of two trip emissions dignosti monitor uses the ECM to store pending DTC nd Freeze Frme dt. For ll monitors, if the filure reurs on the next trip during whih the monitor runs, regrdless of the engine onditions, the ECM will store onfirmed DTC nd turn on the MIL. In ddition, for the misfire nd fuel ontrol monitors, if the filure reurs on the next trip during whih the monitor runs nd where onditions re similr to those experiened when the fult first ourred (engine speed within 375 rpm, engine lod within 20%, nd sme hot/old wrm-up sttus), the ECM will store onfirmed DTC nd turn on the MIL. If the seond filure does not reur s desried ove, the pending DTC nd Freeze Frme dt re lered from memory. All of the System Monitors re two trip monitors. Engine misfire whih is severe enough to dmge the tlyti onverter is two trip monitor. However, the MIL will lwys link when the severe misfire is ourring. PAGE 12 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

15 Automti Clering: When the vehile ompletes three onseutive good/pssing trips (three onseutive trips in whih the monitor tht set the DTC is run nd psses), the MIL will e turned off, ut the onfirmed DTC nd Freeze Frme will remin stored in ECM/TCM memory. For misfire nd fuel ontrol monitor fults, the three onseutive good/pssing trips must tke ple under similr engine onditions (engine speed, lod, nd wrm up ondition) s the initil fult for the MIL to e turned off. If the vehile ompletes 40 Wrm Up yles without the sme fult reurring, the DTC nd Freeze Frme re utomtilly lered from the ECM/TCM memory. Mnul Clering: Any stored DTCs nd Freeze Frme dt n e ersed using the sn tool, nd the MIL (if lit) will e turned off. Although it is not the reommended method, DTCs nd Freeze Frme dt will lso e lered if the B+ power supply for the ECM/TCM is lost, or the ttery is disonneted. SCAN TOOL DATA These re different vlues nd the minimum-to-mximum rnges for eh dt prmeter tht the OBD II sn tool is ple of displying: ECT: 248 to -40 F / 120 to -40 C / 0.0 to 5.0 v. IAT: 248 to -40 F / 120 to -40 C / 0.0 to 5.0 v. MAP/BARO: 20 to 101 kp pressure / 24 to 0 in.hg. vuum / 0.0 to 5.0 v. MAF: 0 to 175 gm/se / 0.0 to 5.0 volts TP 1: 0 to 100% / 0.0 to 5.0 v. TP 2: 0 to 100% / 0.0 to 5.0 v. APP 1: 0 to 100% / 0.0 to 5.0 v. APP 2: 0 to 100% / 0.0 to 5.0 v. CKP (engine speed): 0 to 6000 rpm Clulted Lod Vlue: 0 to 100% HO2S 1/1: 0.00 to 2.00 v. HO2S 2/1: 0.00 to 2.00 v. HO2S 1/2: 0.00 to 2.00 v. Loop: Open / Closed Vlid Ignition Key: Yes / No Fuel Enle: Yes / No Bnk 1 Injetor Pulse Width: 0 to 15 ms Bnk 2 Injetor Pulse Width: 0 to 15 ms Bnk 1 Long Term Fuel Trim: -30% to +30% Bnk 1 Short Term Fuel Trim: -30% to +30% Bnk 2 Long Term Fuel Trim: -30% to +30% Bnk 2 Short Term Fuel Trim: -30% to +30% Ignition Timing Advne: 0 to 60 BTDC Knok Sensor knok deteted: Yes / No Throttle Atutor Control: 0 to 100% Bttery Voltge: 0 to 18 v. Genertor Field: 0 to 100% Intke Cm 1 Desired Advne: 0 to 40 Intke Cm 2 Desired Advne: 0 to 40 CMP 1: 0 to 40 CMP 2: 0 to 40 EGR Vlve Opening Desired: 0 to 100% EGR Position Sensor: 0 to 100% / 0.0 to 5.0 v. Evp Purge Solenoid: 0 to 100% Evp Vent Solenoid: On / Off Fuel Tnk (EVAP) Pressure: to in.h 2 O / -0.5 psi to 0.5 psi / 0.0 to 5.0 v. Fuel Tnk Level: 0 to 100% / 0.0 to 5.0 v. P/S Swith: On / Off Brke Swith: On / Off A/C Request: On / Off A/C Pressure: 25 to 450 psi / 0.0 to 5.0 v. A/C Cluth: On / Off Fn Control: On / Off Fuel Pump: On / Off TR: P/N, R, 1, 2, 3, OD TFT: 248 to -40 F / 120 to -40 C / 0.0 to 5.0 v. VSS: 0 to 110 mph TSS: 0 to 6000 rpm SS 1: On / Off SS 2: On / Off TCC: 0 to 100% PC: 0 to 100% MIL: On / Off / Flshing Confirmed DTCs: P####, U####, et. Pending DTCs: P####, U####, et. Monitor Sttus for this trip: Disled / Not Complete / Complete Time elpsed sine engine strt: hh:mm:ss Distne trveled with MIL on: #### miles/km Distne trveled sine DTCs lered: #### miles/km Numer of wrm-up yles sine DTCs lered: ### Softwre Clirtion ID # (CAL ID) Softwre Verifition Numer (CVN) Vehile Identifition Numer (VIN) ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 13

16 Temperture Temperture Sensor F C Voltge Temperture C ECT, IAT, nd TFT Sensors Sensor Voltge Temperture F Vuum Mnifold t se level Asolute Sensor (in. Hg.) Press. (kp) Voltge Mn. As. Press. (kp) MAP Sensor MAP Sensor Voltge Vuum (in. Hg.) Mss Airflow (gm/se) Sensor Voltge Mss Airflow (gm/se) MAF Sensor MAF Sensor Voltge PAGE 14 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

17 Throttle TP 1 TP 2 Position Sensor Sensor (% open) Voltge Voltge 100 Throttle Position Sensors Throttle Position (%) TP 1 TP TP Sensor Voltge Aelertor APP 1 APP 2 Pedl Pos'n Sensor Sensor (% depressed) Voltge Voltge 100 Aelertor Pedl Position Sensors Aelertor Pedl Position (% depressed) APP 1 APP APP Sensor Voltge A/C High Side Pressure (psi) Sensor Voltge A/C High Side Pressure (psi) A/C Pressure Sensor A/C Pressure Sensor Voltge ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET PAGE 15

18 Fuel Tnk (EVAP) Pressure Sensor (in. H2O) (psi) Voltge Fuel Tnk Press. (psi) Fuel Tnk (EVAP) Pressure Sensor Fuel Tnk Pressure (in. H2O) Fuel Tnk (EVAP) Pressure Sensor Voltge -14 Fuel Level Sensor (% full) Voltge Fuel Level (% full) Fuel Level Sensor Fuel Level Sensor Voltge EGR Vlve Sensor (% open) Voltge EGR Vlve (% open) EGR Vlve Position Sensor EGR Vlve Position Sensor Voltge PAGE 16 ASE COMPOSITE VEHICLE TYPE 3 REFERENCE BOOKLET

19 Eletril Digrm 1 of 3 To B+ in Strt nd Run Fuse #2 To B+ t ll times Fuse #3 To B+ in Strt nd Run Fuse #4 d Throttle Position Sensors 1 +5 v. 18 TP 1 19 TP 2 2 Ign. ECM 3 B+ FP 4 Fuel Pump Rely d Fuel Pump A/C Cluth Crnkshft Position Sensor MAP Sensor EGR Vlve Position Sensor Knok Sensor 20 EGR Position 21 CKP + 22 CKP - 23 MAP 24 KS +5v A/C Cluth 5 Fn Control 6 Coil 1 7 Coil 3 8 Coil 5 9 A/C Cluth Rely Fn Control Rely d d Cooling Fn Motor see Digrm 2 B ECT Sensor IAT Sensor A/C Pressure Sensor Fuel Tnk Pressure Sensor Fuel Level Sensor 25 ECT 26 IAT +5v +5v 27 A/C Pressure Fuel Tnk 28 Pressure 29 Fuel Level 31 Sensor Ground Ground 32 B+ B+ Coil 2 10 Coil 4 11 Coil 6 12 TAC 14 TAC 15 Cm 1 Pos n Cm 1 16 Solenoid Cm 2 Pos n Cm 2 17 Solenoid Throttle Atutor Control Motor Bnk Bnk 2 see Digrm ASE. All rights reserved. A

20 Eletril Digrm 2 of 3 To B+ in Strt nd Run Fuse #56 50 Alertor Pedl Position Sensors 51 d 52 APP 2 e 53 f APP 1 +5v +5v ECM Gen. Field 34 Genertor (Alterntor) f see Digrm 1 A To B+ BAT O2 Sensor - Bnk 1 d O2 Sensor - Bnk 2 d O2 Sensor - Post- Ctlyst d 54 HO2S 1/ HO2S 1/1-56 HO2S 1/1 Heter 57 HO2S 2/ HO2S 2/1-59 HO2S 2/1 Heter 60 HO2S 1/ HO2S 1/2-62 HO2S 1/2 Heter EGR 35 EVAP Vent 36 EVAP Purge 37 INJ 1 38 INJ 2 39 INJ 3 40 EGR Solenoid EVAP Vent Solenoid EVAP Purge Solenoid Cyl. 1 Fuel Injetor Cyl. 2 Fuel Injetor Cyl. 3 Fuel Injetor P/S Pressure Swith 63 PSP INJ 4 41 Cyl. 4 Fuel Injetor Brke Pedl Position Swith 64 BPP INJ 5 42 Cyl. 5 Fuel Injetor A/C On/Off Request Swith 65 A/C Request INJ 6 43 Cyl. 6 Fuel Injetor Cmshft Position Sensor Bnk 1 Cmshft Position Sensor Bnk 2 66 CMP 1 67 CMP 2 +5v +5v Dt Low 46 Dt High 47 see Digrm 3 C D E see Digrm 1 B Mss Airflow Sensor 68 MAF +5v ASE. All rights reserved.

21 Eletril Digrm 3 of 3 To B+ in Strt nd Run Fuse #69 To B+ t ll times Fuse #70 To B+ in Strt nd Run Fuse #72 Trns. Fluid Temp. Sensor Vehile Speed Sensor Trns. Turine Shft Speed Sensor 80 TFT 81 VSS + 82 VSS - 83 TSS + 84 TSS - 69 Ign. +5v 85 Prk/Neutrl TCM 70 B+ TCC 72 SS 1 74 SS 2 75 PC 76 TCC Solenoid Trns. Shift Solenoid 1 Trns. Shift Solenoid 2 Trns. Pressure Control Solenoid 86 Rev d 87 1st e 88 2nd f 89 3rd Dt High 78 g To B+ in Strt nd Run Fuse #99 Trnsmission Rnge Swith 90 OD 91 Sensor Ground Ground Ign. IMMOBILIZER 96 Ant. + MODULE Dt Low 94 Dt High 95 Dt Low 79 see Digrm 2 C D E To B+ t ll times Trnsponder Key 97 Ant. - Ground 98 Fuse #74 99 Ign. 100 Dt Low 101 Dt High Fuel Level Ign Thometer Speedometer INSTRUMENT CLUSTER Temperture Ground 102 MIL Immoilizer DATA LINK CONNECTOR ASE. All rights reserved.

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24 y the Ntionl Institute for AUTOMOTIVE SERVICE EXCELLENCE (ASE) All rights reserved 101 Blue Sel Dr. S.E., Suite 101, Leesurg, VA (703) Revised 12/2006 ACT * * PEM AC