ENGINE CONTROL (22R E)

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1 ENGINE CONTRO (R E) I5 IGNITION S STARTER REAY [R/ NO. ] P N AM ST 5 IG 7 7 C 5 E 4 Y C (FOOR SHIFT) 80A AT P PARK/NEUTRA POSITION S AM (COUMN SHIFT) (NEUTRA START S) I4 C FUSE OX [R/ NO. ] 5 7 I C Y Y 7. 5A IGN G 5 7 EFI MAIN REAY 4 G Y G Y C 5A EFI I I4 G C CIRCUIT OPENING REAY E : A/T, M/T ADD E0 : M/T, 4 C C G 0 G C A E D 5 C E 5 E7 A,, E8 C, D, E9 E, F ENGINE CONTRO MODUE (ENGINE AND EECTRONIC CONTROED TRANSMISSION ECU, ENGINE ECU ) A C A 0 C C C 9 C 5 F F F 9 F C 5 E 4 E 0 E E I FC E5 E V VC VS THA V8 VOUME AIR FO (AIR FO METER) E5 ATT # 0 I8 INJECTOR NO. E + VC VS THA E G Y I0 INJECTOR NO. Y G E E E I9 INJECTOR NO. E E E D E #0 E A F C I5 I INJECTOR NO. 4 (4D A/T) (4D M/T) (D) (4D A/T) (4D M/T) (D) E0 : A/T M/T 4D E : M/T D Y M F FUE PUMP 7 I I I5 I5 Y TO COD START INJECTOR START INJECTOR TIME S Y Y A E 4

2 5A STOP 0A GAUGE C 9 INTEGRATION REAY G R S8 STOP IGHT S G 5 C G V C V 9 D G 4 A 9 C0 A, C MAFUNCTION INDICATOR AMP (CHECK ENGINE ARNING IGHT) [COM. METER] A 5 A (4D A/T) 8 (4D M/T) C 0 C (D) THG TH ID VTA VCC NS STA STJ STP E7 A,, E8 C, D, E9 E, F ENGINE CONTRO MODUE (ENGINE AND EECTRONIC CONTROED TRANSMISSION ECU, ENGINE ECU ) C 4 C (4D A/T) C C C A E 9 E 0 E 8 E 9 A F 4 F (4D M/T) F 0 F F 5 D D D 9 D 0 D D E E (D) 9 E 7 E 8 E E E 5 E 5 C C 5 C C AS FPU EGR SPD G E EGR GAS TEMP. (CAIFORNIA) G G G E4 ENGINE COOANT TEMP. (EFI ATER TEMP. E Y Y G Y 4 ID VTA VCC Y R Y I5 TO COD START INJECTOR, START INJECTOR TIME S V VSV (AS) G R V5 VSV (FPU) G V4 VSV (EGR, CAIFORNIA) P 0 C G A C A,C COMINATION METER E : A/T ADD E0 : EX. A/T ADD C T THROTTE POSITION I5 Y E0 E E0 Y E 5

3 ENGINE CONTRO (R E) I IGNITION COI AND IGNITER TO TACHOMETER [COM. METER] I5 IGNITER K KNOCK 4 DISTRIUTOR O Y (SHIEDED) TE 4 C 7 7 C T DG 4 E E 0 E (4D A/T) 4 D E F 7 E NE IGF IGT VF D (4D M/T) E (D) E7 A,,E8 C, D,E9 E, F ENGINE CONTRO MODUE (ENGINE AND EECTRONIC TRANSMISSION ECU, ENGINE ECU ) OX HT 7 C 4 F C 0 A 8 C (4D A/T) 5 C 5 E C E 4 E E E F 8 F (4D M/T) 5 F 4 F F 4 D D D C C (D) E 4 E 0 E E 4 E E E OX HT KNK E E0 E0 V G V V Y R G P G 7 9 T 7 TE DG VF IG 8 D DATA INK CONNECTOR (CHECK CONNECTOR) + FP E 8 E9 OX OX 4 E E H5 HEATED OXYGEN (OXYGEN ) SU R G H4 HEATED OXYGEN (OXYGEN ) MAIN OX + HT E OX 4 4 P G (SHIEDED) HT + E E0 I5 (SHIEDED) E9 : A/T, M/T ADD E : M/T, E0 : A/T ADD E E E0 C

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5 ENGINE CONTRO (R E) SYSTEM OUTINE THE ENGINE CONTRO SYSTEM UTIIZES A MICROCOMPUTER AND MAINTAINS OVERA CONTRO OF THE ENGINE, TRANSMISSION, ETC.. AN OUTINE OF ENGINE CONTRO IS GIVEN HERE.. INPUT SIGNA () ENGINE COOANT TEMP. (ATER TEMP.) SIGNA SYSTEM THE ENGINE COOANT TEMP. (ATER TEMP. ) DETECTS THE ENGINE COOANT TEMP. AND HAS A UIT IN THERMISTOR ITH A RESISTANCE HICH VARIES ACCORDING TO THE ENGINE COOANT TEMP. (ATER TEMP.). THUS THE ENGINE COOANT TEMP. (ATER TEMP.) IS INPUT IN THE FORM OF A CONTRO SIGNA TO TERMINA TH OF THE ENGINE CONTRO MODUE (ENGINE AND EECTRONIC CONTROED TRANSMISSION ECU, ENGINE ECU ). () INTAKE AIR TEMP. SIGNA SYSTEM THE INTAKE AIR TEMP. IS INSTAED INSIDE THE VOUME AIR FO (AIR FO METER) AND DETECTS THE INTAKE AIR TEMP., HICH IS INPUT AS A CONTRO SIGNA TO TERMINA THA OF THE ENGINE CONTRO MODUE (ECU). () OXYGEN SIGNA SYSTEM THE OXYGEN DENSITY IN THE EXHAUST EMISSIONS IS DETECTED AND INPUT AS A CONTRO SIGNA TO TERMINA OX OF THE ENGINE CONTRO MODUE (ECU). TO MAINTAIN STAE DETECTION PERFORMANCE Y THE OXYGEN, A HEATER IS USED FOR ARMING THE. THE HEATER IS ASO CONTROED Y THE ENGINE CONTRO MODUE (ECU) (HT). (4) RPM SIGNA SYSTEM THE CRANKSHAFT POSITION AND ENGINE SPEED ARE DETECTED Y THE PICK UP COI INSTAED INSIDE THE DISTRIUTOR, AND ARE INPUT AS CONTRO SIGNAS TO TERMINA NE OF THE ENGINE CONTRO MODUE (ECU). (5) THROTTE SIGNA SYSTEM THE THROTTE POSITION DETECTS THE THROTTE VAVE OPENING ANGE, HICH IS INPUT AS A CONTRO SIGNA TO TERMINA VTA OF THE ENGINE CONTRO MODUE (ECU), OR HEN THE VAVE IS FUY COSED, TO TERMINA ID. () VEHICE SPEED SIGNA SYSTEM THE VEHICE SPEED (SPEED ), INSTAED INSIDE THE COMINATION METER, DETECTS THE VEHICE SPEED AND INPUT A CONTRO SIGNA TO TERMINA SPD OF THE ENGINE CONTRO MODUE (ECU). (7) PARK/NEUTRA POSITION S (NEUTRA START S) SIGNA SYSTEM THE PARK/NEUTRA POSITION S (NEUTRA START S) DETECTS HETHER THE SHIFT POSITION IS IN NEUTRA OR NOT, AND INPUTS A CONTRO SIGNA TO TERMINA NS OF THE ENGINE CONTRO MODUE (ECU). (8) ATTERY SIGNA SYSTEM VOTAGE IS CONSTANTY APPIED TO TERMINA ATT OF THE ENGINE CONTRO MODUE (ECU). HEN THE IGNITION S IS TURNED TO ON, VOTAGE FOR ENGINE CONTRO MODUE (ECU) OPERATION IS APPIED VIA THE EFI MAIN REAY TO TERMINAS + AND OF THE ENGINE CONTRO MODUE (ECU). (9) INTAKE AIR VOUME SIGNA SYSTEM INTAKE AIR VOUME IS DETECTED Y THE POTENTIOMETER INSTAED INSIDE THE VOUME AIR FO (AIR FO METER) AND IS INPUT AS A CONTRO SIGNA TO TERMINA VS OF THE ENGINE CONTRO MODUE (ECU). INSIDE THE VOUME AIR FO (AIR FO METER) THERE IS ASO A S FOR FUE PUMP OPERATION, AND HEN THE MEASURING PATE OPENS (AIR INTAKE OCCURS), THIS S TURNS ON AND CURRENT FOS TO THE FUE PUMP TO OPERATE IT. (0) STOP IGHT S SIGNA SYSTEM THE STOP IGHT S IS USED TO DETECT HETHER OR NOT THE VEHICE IS AKING AND THE INFORMATION IS INPUT AS A CONTRO SIGNA TO TERMINA STP OF THE ENGINE CONTRO MODUE (ECU). () STA SIGNA SYSTEM TO CONFIRM THAT THE ENGINE IS CRANKING, THE VOTAGE APPIED TO THE STARTER MOTOR DURING CRANKING IS DETECTED AND IS INPUT AS A CONTRO SIGNA TO TERMINA STA OF THE ENGINE CONTRO MODUE (ECU). () ENGINE KNOCK SIGNA SYSTEM ENGINE KNOCKING IS DETECTED Y THE KNOCK AND INPUT AS A CONTRO SIGNA TO TERMINA KNK OF THE ENGINE CONTRO MODUE (ECU). () 4D SIGNA SYSTEM HETHER OR NOT THE VEHICE IS OPERATING IN 4D MODE IS DETERMINED, AND A CONTRO SIGNA IS INPUT TO TERMINA 4D OF THE ENGINE CONTRO MODUE (ECU). 8

6 . CONTRO SYSTEM * MFI (MUTIPORT FUE INJECTION) (EFI) SYSTEM THE MFI (EFI) SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNAS EACH (INPUT SIGNAS ( TO, )) INPUTS TO THE ENGINE CONTRO MODUE (ECU). ASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ENGINE CONTRO MODUE (ECU), THE MOST APPROPRIATE FUE INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINAS #0 AND #0 OF THE ENGINE CONTRO MODUE (ECU). CAUSING THE INJECTORS TO OPERATE IT (TO INJECT FUE). IT IS THIS SYSTEM HICH, THROUGH THE ORK OF THE ENGINE CONTRO MODUE (ECU), FINEY CONTROS FUE INJECTION IN RESPONSE TO DRIVING CONDITIONS. * ESA (EECTRONIC SPARK ADVANCE) SYSTEM THE ESA SYSTEM MONITORS THE ENGINE CONDITIONS USING THE SIGNAS (INPUT SIGNAS (, TO 8, 0, )) INPUT TO THE ENGINE CONTRO MODUE (ECU) FROM EACH. ASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ENGINE CONTRO MODUE (ECU), THE MOST APPROPRIATE IGNITION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINA IGT OF THE ENGINE CONTRO MODUE (ECU). THIS OUTPUT CONTROS THE IGNITER TO PRODUCE THE MOST APPROPRIATE IGNITION TIMING FOR THE DRIVING CONDITIONS. * FUE PRESSURE UP SYSTEM THE FUE PRESSURE UP SYSTEM CAUSES THE VSV (FOR FUE PRESSURE UP) TO COME ON FOR HIGH TEMP. STARTS AND FOR AOUT 0 SECONDS AFTER STARTING IN ORDER TO INCREASE THE FUE PRESSURE, IMPROVE STARTAIITY AT HIGH TEMPERATURES AND PROVIDE STAE IDING. THE ENGINE CONTRO MODUE (ECU) EVAUATES THE INPUT SIGNAS FROM EACH (,, 4 AND ), OUTPUTS CURRENT TO TERMINA FPU AND CONTROS THE VSV. * OXYGEN HEATER CONTRO SYSTEM THE OXYGEN HEATER CONTRO SYSTEM TURNS THE HEATER TO ON HEN THE INTAKE AIR VOUME IS O (TEMP. OF EXHAUST EMISSIONS O), AND ARMS UP THE HEATED OXYGEN (OXYGEN ) TO IMPROVE DETECTION PERFORMANCE OF THE. THE ENGINE CONTRO MODUE (ECU) EVAUATES THE SIGNAS FROM EACH (INPUT SIGNAS (,, 9, 0, )), CURRENT IS OUTPUT TO TERMINA HT AND CONTROS THE HEATER. * AS CONTRO SYSTEM THE AS CONTRO SYSTEM TURNS ON THE VSV (FOR AS) HEN THE ENGINE IS COD AND DURING DECEERATION, PREVENTING OVERHEATING OF THE TC (THREE AY CATAYTIC CONVERTER) AND REDUCING HC AND CO EMISSIONS. THE ENGINE CONTRO MODUE (ECU) EVAUATES THE SIGNAS FROM EACH (INPUT SIGNAS (, 4, 5, 0)), THEN SENDS OUTPUT TO TERMINA AS AND CONTROS THE VSV. * EGR CUT CONTRO SYSTEM (FOR CAIFORNIA) THE EGR CUT CONTRO SYSTEM CONTROS THE VSV (FOR EGR) Y EVAUATING THE SIGNAS FROM EACH INPUT TO THE ENGINE CONTRO MODUE (ECU) (INPUT SIGNAS (, 9)) AND Y SENDING OUTPUT TO TERMINA EGR OF THE ENGINE CONTRO MODUE (ECU).. DIAGNOSIS SYSTEM ITH THE DIAGNOSIS SYSTEM, HEN THERE IS A MAFUNCTION IN THE ENGINE CONTRO MODUE (ECU) SIGNA SYSTEM, THE MAFUNCTIONING SYSTEM IS RECORDED IN THE MEMORY. THE MAFUNCTIONING SYSTEM CAN THEN E FOUND Y READING THE DISPAY (CODE) OF THE MAFUNCTION INDICATOR AMP (CHECK ENGINE ARNING IGHT). 4. FAI SAFE SYSTEM HEN A MAFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIIITY OF ENGINE TROUE EING CAUSED Y CONTINUED CONTRO ASED ON THE SIGNAS FROM THAT SYSTEM, THE FAI SAFE SYSTEM EITHER CONTROS THE SYSTEM Y USING DATA (STANDARD VAUES) RECORDED IN THE ENGINE CONTRO MODUE (ECU) MEMORY OR ESE STOPS THE ENGINE. 9

7 ENGINE CONTRO (R E) SERVICE HINTS V8 VOUME AIR FO (AIR FO METER) : OPEN ITH MEASURING PATE COSED COSED ITH MEASURING PATE OPEN 4 : : : (MEASURING PATE FUY COSED) 0 00 (MEASURING PATE FUY OPEN) 7 : 0 0 K ( 0 C, 4 F) 4 7 K (0 C, F) K (0 C, 8 F) 0.9. K (40 C, 04 F) K (0 C, 40 F) C CIRCUIT OPENING REAY : THROTTE POSITION E4 ENGINE COOANT TEMP. (EFI ATER TEMP. ) : 0 0 K ( 0 C, 4 F) 4 7 K (0 C, F) K (0 C, 8 F) 0.9. K (40 C, 04 F) K (0 C, 40 F) K (80 C, 7 F) I8, I9, I0, I INJECTOR : APPROX P PARK/NEUTRA POSITION S (NEUTRA START S) : COSED ITH A/T SHIFT EVER IN P OR N POSITION T THROTTE POSITION : K ITH CEARANCE ETEEN EVER AND STOP SCRE 0 MM (0 IN.) :. K OR ESS ITH CEARANCE ETEEN EVER AND STOP SCRE 0.57 MM (0.04 IN.) INFINITY ITH CEARANCE ETEEN EVER AND STOP SCRE 0.85 MM (0.05 IN.) :.. K ITH THROTTE VAVE FUY OPEN 4 : K E7(A), (), E8(C), (D), E9(E), (F) ENGINE CONTRO MODUE (ENGINE AND EECTRONIC CONTROED TRANSMISSION ECU, ENGINE ECU ) VOTAGE AT ENGINE CONTRO MODUE (ECU) CONNECTORS + E : 9 4 VOTS (IGNITION S ON) ATT E: 9 4 VOTS (AAYS) VCC E : 4 VOTS (IGNITION S ON) ID E : 9 4 VOTS (IGNITION S ON AND THROTTE VAVE OPEN) VTA E : VOTS (IGNITION S ON AND THROTTE VAVE FUY COSED). 4.9 VOTS (IGNITION S ON AND THROTTE VAVE FUY OPEN) IGT E : VOTS (CRANKING OR IDING) STA E : VOTS (IGNITION S AT ST POSITION) #0 E0, #0 E0 :9 4 VOTS (IGNITION S ON) E : 9 4 VOTS (NO TROUE AND ENGINE RUNNING) VS E : VOTS (IGNITION S ON AND MEASURING PATE FUY COSED) VOTS (IGNITION S ON AND MEASURING PATE FUY OPEN)..8 VOTS (IDING) THA E : VOTS (IGNITION S ON AND INTAKE AIR TEMP. 0 C, 8 F) TH E : 0..0 VOTS (IGNITION S ON AND COOANT TEMP. 80 C, 7 F) VC E : VOTS (IGNITION S ON) STP E : VOTS (STOP IGHT S ON) STJ E : 9 4 VOTS (IGNITION S AT ST POSITION COOANT TEMP. 80 C, 7 F) RESISTANCE AT ENGINE CONTRO MODUE (ECU) IRING CONNECTOR (DISCONNECT IRING CONNECTOR) ID E : INFINITY (THROTTE VAVE OPEN) 0 00 (THROTTE VAVE FUY COSED) VTA E :. 0 K (THROTTE VAVE FUY OPEN) K (THROTTE VAVE FUY COSED) THA E : K (INTAKE AIR TEMP. 0 C, 8 F) TH E : K (COOANT TEMP. 80 C, 78 F) + E :. 0.4 K VS E : K (MEASURING PATE FUY COSED) K (MEASURING PATE FUY OPEN) NE E :

8 : PARTS OCATION CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE C E K 5 E9 C0 A F P 5 C A F 7 S 8 C H 4 5 T 5 D 5 H 5 5 V 5 E 4 I 5 V 4 5 E 4 4 I 8 5 V 5 5 E7 A I 9 5 V 8 5 I0 5 E8 C I 5 D I5 : REAY OCKS CODE SEE PAGE REAY OCKS (REAY OCK OCATION) 9 R/ NO. (ENGINE COMPARTMENT RIGHT) : JUNCTION OCK AND IRE HARNESS CONNECTOR CODE SEE PAGE JUNCTION OCK AND IRE HARNESS (CONNECTOR OCATION) C D 0 CO IRE AND J/ NO. (EFT KICK PANE) : CONNECTOR JOINING IRE HARNESS AND IRE HARNESS CODE SEE PAGE JOINING IRE HARNESS AND IRE HARNESS (CONNECTOR OCATION) A 4 0 (R E) CO IRE AND ENGINE ROOM MAIN IRE (R/ NO.) C ENGINE IRE AND CO IRE (RIGHT KICK PANE) I 4 FRAME IRE AND CO IRE (UNDER PASSENGER S SEAT) : GROUND POINTS CODE SEE PAGE GROUND POINTS OCATION A 0 (R E) EFT FENDER C 0 (R E) INTAKE MANIFOD E EFT KICK PANE : SPICE POINTS CODE SEE PAGE IRE HARNESS ITH SPICE POINTS CODE SEE PAGE IRE HARNESS ITH SPICE POINTS E 9 E5 0 (R E) ENGINE IRE E0 I E 0 (R E) ENGINE IRE I CO IRE E I4 E I5 ENGINE IRE 7

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