ENGINE CONTROL (2RZ-FE) SYSTEM OUTLINE
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- Terence Riley
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1 ENGINE CONTRO (RZ-FE) 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. SIGNA SYSTEM THE ENGINE COOANT TEMP. SENSOR DETECTS THE ENGINE COOANT TEMP. AND HAS A UIT-IN THERMISTOR ITH A RESISTANCE HICH VARIES ACCORDING TO THE ATER TEMP. THUS THE ATER TEMP. IS INPUT IN THE FORM OF A CONTRO SIGNA TO TERMINA TH OF THE ENGINE CONTRO MODUE. () INTAKE AIR TEMP. SIGNA SYSTEM THE INTAKE AIR TEMP. SENSOR DETECTS THE INTAKE AIR TEMP., HICH IS INPUT AS A CONTRO SIGNA TO TERMINA THA OF THE ENGINE CONTRO MODUE. () HEATED OYGEN SENSOR SIGNA SYSTEM THE OYGEN DENSITY IN THE EHAUST EMISSIONS IS DETECTED AND INPUT AS A CONTRO SIGNA TO TERMINA O OR O OF THE ENGINE CONTRO MODUE. TO MAINTAIN STAE DETECTION PERFORMANCE Y THE HEATED OYGEN SENSOR, A HEATER IS USED FOR ARMING THE SENSOR. THE HEATER IS ASO CONTROED Y THE ENGINE CONTRO MODUE (HT OR HT). (4) RPM SIGNA SYSTEM CRANKSHAFT POSITION AND ENGINE RPM ARE DETECTED Y THE PICK-UP COI INSIDE THE DISTRIUTOR, THEN CRANKSHAFT POSITION AND ENGINE RPM SIGNAS ARE INPUT TO TERMINAS NE AND NE-. (5) THROTTE SIGNA SYSTEM THE THROTTE POSITION SENSOR DETECTS THE THROTTE VAVE OPENING ANGE, HICH IS INPUT AS A CONTRO SIGNA TO TERMINA VTA OF THE ENGINE CONTRO MODUE, OR HEN THE VAVE IS FUY COSED, TO TERMINA ID. (6) VEHICE SPEED SIGNA SYSTEM THE VEHICE SPEED SENSOR, INSTAED INSIDE THE COMINATION METER, DETECTS THE VEHICE SPEED AND INPUTS A CONTRO SIGNA TO TERMINA SP OF THE ENGINE CONTRO MODUE. (7) A/C S SIGNA SYSTEM THE OPERATING VOTAGE OF THE A/C MAGNETIC CUTCH IS DETECTED AND INPUT IN THE FORM OF A CONTRO SIGNA TO TERMINA AC OF THE ENGINE CONTRO MODUE. (8) ATTERY SIGNA SYSTEM VOTAGE IS CONSTANTY APPIED TO TERMINA ATT OF THE ENGINE CONTRO MODUE. HEN THE IGNITION S IS TURNED TO ON, VOTAGE FOR ENGINE CONTRO MODUE OPERATION IS APPIED VIA THE EFI REAY TO TERMINA + OF THE ENGINE CONTRO MODUE. (9) INTAKE AIR VOUME SIGNA SYSTEM INTAKE AIR VOUME IS DETECTED Y THE MASS AIR FO METER AND A SIGNA IS INPUT INTO TERMINA VG OF THE ENGINE CONTRO MODUE AS A CONTRO SIGNA. (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 TERMINAS K OF THE ENGINE CONTRO MODUE. () STARTER 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. () ENGINE KNOCK SIGNA SYSTEM ENGINE KNOCKING IS DETECTED Y THE KNOCK SENSOR AND INPUT AS A CONTRO SIGNA TO TERMINA KNK OF THE ENGINE CONTRO MODUE. 87
2 . CONTRO SYSTEM MFI SYSTEM THE MFI SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNAS EACH SENSOR (INPUT SIGNAS ( TO )) INPUTS TO THE ENGINE CONTRO MODUE. ASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ENGINE CONTRO MODUE, THE MOST APPROPRIATE FUE INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINAS #0 AND #0 OF THE ENGINE CONTRO MODUE. CAUSING THE INJECTORS TO OPERATE (TO INJECT FUE). IT IS THIS SYSTEM HICH, THROUGH THE ORK OF THE ENGINE CONTRO MODUE FINEY CONTROS FUE INJECTION IN RESPONSE TO DRIVING CONDITIONS. EECTRONIC SPARK ADVANCE SYSTEM THE ESA SYSTEM MONITORS THE ENGINE CONDITIONS USING THE SIGNAS (INPUT SIGNAS (, 4, 5 TO 7, 9,, )) INPUT TO THE ENGINE CONTRO MODUE FROM EACH SENSOR. ASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ENGINE CONTRO MODUE, THE MOST APPROPRIATE IGNITION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINA IGT OF THE ENGINE CONTRO MODUE. THIS OUTPUT CONTROS THE IGNITER TO PRODUCE THE MOST APPROPRIATE IGNITION TIMING FOR THE DRIVING CONDITIONS. HEATED OYGEN SENSOR HEATER CONTRO SYSTEM THE HEATED OYGEN SENSOR HEATER CONTRO SYSTEM TURNS THE HEATER TO ON HEN THE INTAKE AIR VOUME IS O (TEMP. OF EHAUST EMISSIONS O), AND ARMS UP THE HEATED OYGEN SENSOR TO IMPROVE DETECTION PERFORMANCE OF THE SENSOR. THE ENGINE CONTRO MODUE EVAUATES THE SIGNAS FROM EACH SENSOR (INPUT SIGNAS (, 4, 8, 9, )), CURRENT IS OUTPUT TO TERMINA HT OR HT AND CONTROS THE HEATER. EGR CUT CONTRO SYSTEM THE EGR CUT CONTRO SYSTEM CONTROS THE VSV (EGR) Y EVAUATING THE SIGNAS FROM SENSOR INPUT TO THE ENGINE CONTRO MODUE (INPUT SIGNA (, 9)) AND Y SENDING OUTPUT TO TERMINA EGR OF THE ENGINE CONTRO MODUE.. DIAGNOSIS SYSTEM ITH THE DIAGNOSIS SYSTEM, HEN THERE IS A MAFUNCTION IN THE 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. 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 MEMORY OR ESE STOPS THE ENGINE. THE ENGINE CONTRO SYSTEM UTIIZES A MICROCOMPUTER AND MAINTAINS OVERA CONTRO OF THE ENGINE, TRANSMISSION, ETC. AND OUTINE OF ENGINE CONTRO IS GIVEN HERE. 88
3 ENGINE CONTRO (RZ-FE) - R I 6 - R 7 IF - R I 4 7 I4 IGNITION S AM AM ACC IG ST IG 6 ST - R STARTER REAY 5 E - - R 7 5 F F A IGN EFI REAY 6 IF FROM POER SOURCE SYSTEM (SEE PAGE 50) 8 G- R IF 0A PANE - Y G- R 9 G- R D D - - R E 40A AM 80A AT 0A AM 7. 5A STA IF IRCUIT OPENING EAY C R C N 5 E 7 - IF E 4 E E - G - G - IF V 4 VSV (EVAP) - J JUNCT ION CONNE CTOR N 6 IK - G ATTERY E 4 E E 6 F F 8 FUE PUMP M 7 F 9 F EA IE ID 89
4 * : / CRUISE CONTRO * : /O CRUISE CONTRO - R 8 IK - R FROM POER SOURCE SYSTEM (SEE PAGE 50) T THROTTE POSITION SENSOR 4 - Y G- R - Y 5 IF - Y 5A EFI Y - - I0 I0 I0 + E VG RSC RSO EGR SP A 6 C C 9 D 0 D 6 D 9 A - GR- R - R Y P- G- O (*) FROM CRUISE CONTRO ECU I0 E ENGINE COOANT TEMP. SENSOR G- R E EGR GAS TEMP. SENS OR P - I INTAKE AIR TEMP. SEN SOR Y- G 9 A ES A A C C C 4 C C 9 C 7 C ATT NS VCC VTA ID TH THG E THA E 5 A, E 7 C, E 8 D ENGINE CONTRO MODUE PRG D - G M MASS AIR FO METER I ID E AIR CONTRO VAVE V VSV(EGR) -R 7 E 6 E G- O (*) G- O (*) - G 6 IK I0 I0 I0 C C0 A, C VEHICE SPEED SENSOR [COM. METER] 0 C A D 0 D ID 90
5 ENGINE CONTRO (RZ-FE) - R - R - R E 5 FROM POER SOURCE SYSTEM (SEE PAGE 50) - R - R - R - R E 5 E 7 E 7 - R - R - R 5A STOP I0 I0 S 5 A STOP IGHT S D D 0 A 5 A #0 #0 K V FC 4 A STA ACT AC TE O HT A 5 C 6 C D V-, 0A GAUGE I 6 INJECTOR NO. I 8 INJECTOR NO. I 7 INJECTOR NO. I 9 INJECTOR NO. 4 0 IF A (*) (*) A (*) (*) G- 5 C 4 C C0 A MAFUNCTION INDICATOR AMP [COM. METER] 5 - O 7 D 9 D - O 5 A 6 A G- 8 A 0 A E 5 A, E 7 C, E 8 D P- G ENGINE CONTRO MODUE Y IJ IJ - - Y 8 A A/C AMPIFIER D DATA INK CONNECTOR 8 TE + E R R - 4 H HE ATED OYGEN SENSO R ( ANK SENSOR ) I0 I
6 * : / CRUISE CONTRO * : /O CRUISE CONTRO - R - R I0 FROM POER SOURCE SYSTEM (SEE PAGE 50) TO TACHOMETER [COM. METER] 0A OD I IGNITER - R R C- NE G+ G- D 6 DISTRIUTOR C CRANKSHAFT POSITION SENSOR G NE- NE R E I0 V IF - Y - IGF IGT Y G D 0 D 5 D 8 D 7 D 4 D 7 A G- SD I 9 G - E 5 A, E 7 C, E 8 D O HT KNK E EO EO EO 5 C 5 D C 4 D 5 D 6 D D 6 IK I0 4 I0 I0 NE- NE V 6 SD ATT D 7 DATA INK CONNECTOR SG CG 5 4 ENGINE CONTRO MODUE R- I0 H 4 HEATED OYGEN SENSOR (ANK SENSOR ) K KNOCK SENSOR I0 IK - I0 E 9
7 SERVICE HINTS ENGINE CONTRO (RZ-FE) EFI REAY () 5- () : COSED ITH IGNITION S AT ON OR ST POSITION C 6 CIRCUIT OPENING REAY - : COSED ITH STARTER RUNNING I 6, I 7, I 8, I 9 INJECTOR - :.4-4. Ω T THROTTE POSITION SENSOR -4 : KΩ ITH CEARANCE ETEEN EVER AND STOP SCRE 0 MM (0 IN.) -4 :. KΩ OR ESS ITH CEARANCE ETEEN EVER AND STOP SCRE 0.50 MM (0.097 IN.) INFINITY ITH CEARANCE ETEEN EVER AND STOP SCRE 0.77 MM (0.00 IN.) -4 :.-0 KΩ ITH THROTTE VAVE FUY OPEN -4 : 4-9 KΩ E ENGINE COOANT TEMP. SENSOR - : 0-0 KΩ (-0 C, -4 F) 4-7 KΩ (0 C, F) - KΩ (0 C, 68 F) KΩ (40 C, 04 F) KΩ (60 C 40 F) KΩ (80 C, 76 F) E 5 (A), (D), E 6 (E), E 7 (),(F), E 8 (C),(G) ENGINE CONTRO MODUE VOTAGE AT ENGINE CONTRO MODUE IRING CONNECTORS +-E : 9-4 VOTS (IGNITION S ON) ATT-E : 9-4 VOTS (AAYS) VCC-E : 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 : PUSE GENERATION (CRANKING OR IDING) STA-E : 6 VOTS OR MORE (IGNITION S AT ST POSITION) -E : 9-4 VOTS (NO TROUE AND ENGINE RUNNING) THA-E : VOTS (IGNITION S ON AND INTAKE AIR TEMP. 0 C, 68 F) TH-E : VOTS (IGNITION S ON AND COOANT TEMP. 80 C, 76 F) SP-E : PUSE GENERATION ITH VEHICE MOVING K-E : VOTS (STOP IGHT S ON) #0, #0-E : 9-4 VOTS (IGNITION S ON) RESISTANCE AT ECU IRING CONNECTOR (DISCONNECT IRING CONNECTOR) ID-E : INFINITY (THROTTE VAVE OPEN) 0-00 (THROTTE VAVE FUY COSED) VTA-E :.-0 KΩ (THROTTE VAVE FUY OPEN) KΩ (THROTTE VAVE FUY COSED) THA-E : - KΩ (INTAKE AIR TEMP. 0 C, 68 F) TH-E : KΩ (COOANT TEMP. 80 C, 78 F) +-E : KΩ NE-E : Ω 9
8 : PARTS OCATION CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE A 8 E 7 C 9 I 7 C 6 E 8 D 9 I4 9 C 6 8 F 8 0 J 7 C0 A 8 H 6 K 7 C C 8 H 4 6 M 7 D 6 I 7 A 9 S5 D 6 6 I 7 9 D 7 8 I 6 7 T 7 E 8 I 7 7 V 7 E 6 I 8 7 V 4 7 E 5 A 9 I 9 7 : REAY OCKS CODE SEE PAGE REAY OCKS (REAY OCK OCATION) 9 R/ NO. (ENGINE COMPARTMENT EFT),,,,,, : JUNCTION OCK AND IRE HARNESS CONNECTOR CODE SEE PAGE JUNCTION OCK AND IRE HARNESS (CONNECTOR OCATION) 0 CO IRE AND J/ NO. (EFT KICK PANE) F 0 ENGINE ROOM MAIN IRE AND J/ NO. (EFT KICK PANE) C D E F CO IRE AND J/ NO. (EHIND THE INSTRUMENT PANE CENTER) : CONNECTOR JOINING IRE HARNESS AND IRE HARNESS CODE SEE PAGE JOINING IRE HARNESS AND IRE HARNESS (CONNECTOR OCATION) IF 6 ENGINE ROOM MAIN IRE AND CO IRE (EFT KICK PANE) IJ 6 CO IRE AND A/C SU IRE (EHIND THE GOVE O) IK IK 6 ENGINE IRE AND CO IRE (RIGHT KICK PANE) N 8 FRAME IRE AND CO IRE (UNDER THE DRIVER S SEAT) : GROUND POINTS CODE SEE PAGE GROUND POINTS OCATION EA 4 (RZ-FE) FRONT EFT FENDER E 4 (RZ-FE) NEAR THE THROTTE ODY ID 6 EFT KICK PANE IE 6 AROUND THE RIGHT EDGE OF THE REINFORCEMENT : SPICE POINTS CODE SEE PAGE IRE HARNESS ITH SPICE POINTS CODE SEE PAGE IRE HARNESS ITH SPICE POINTS E E E 5 E 7 4 (RZ-FE) ENGINE ROOM MAIN IRE 4 (RZ-FE) ENGINE IRE I 4 I 6 6 CO IRE I 9 I0 6 ENGINE IRE 94
9 ENGINE CONTRO (RZ-FE) A C DARK GRAY C 6 DARK GRAY C0 A ON C C UE D ACK D 6 ACK D 7 ACK E DARK GRAY E DARK GRAY E 5 A (M/T) E 5 A E 7 C E 8 D (ETRA CA) F 8 DARK GRAY (REGUAR CA) F 8 DARK GRAY H, H 4 DARK GRAY I ACK I ACK I 6, I 7, I 8, I 9 UE I ACK I
10 J K DARK GRAY M ACK (/ CRUISE CONTRO) S 5 A (HINT : SEE PAGE 7) (/O CRUISE CONTRO) S 5 ACK T ACK V GREEN V 4 ACK 4 96
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