ENGINE CONTROL (2RZ FE)
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- Corey Simpson
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1 ENGINE CONTROL (RZ FE) IF (A/T) AM IG 6 FROM POER SOURCE SYSTEM (SEE PAGE 44) AM ACC IG ST IF. A STA F FUSE O. A IGN A EFI 0A OD A STOP I4 IGNITION S (A/T) (A/T) F 0 (M/T) Y Y V (A/T) IK3 (A/T) (M/T) 3 EFI RELAY IF Y J JUNCTION CONNECTOR 30A AM 40A AM 0A ALT P PARK/NEUTRAL POSITION S P N (A/T) IK (A/T) 6 9 (M/T) C 9 CLUTCH START S C 6 CIRCUIT OPENING RELAY 3 4 L D DATA LINK CONNECTOR 3 V V 6 ATT CG 4 SIL SG 9 N L 4 3A 3A ATTERY J 9 A, J0 JUNCTION CONNECTOR D E A IK 6 4 M N F FUEL PUMP 6 3A 6 IK IK EA IG IE E E
2 (A/T) IK * : / CRUISE CONTROL * : /O CRUISE CONTROL Y 0 IF IF Y S A, G G 6 3F 3F (A/T) I 6 INJECTOR NO. I INJECTOR NO. I INJECTOR NO. 3 R INJECTOR NO. 4 R L 9 A SIL A ATT A K A NS D D 0 D 9 D #0 #0 #30 #40 IF EVP 3 D G TPC + FC STA C A 4 D A GR G E3 VG THA E THG TH C 3 C 9 C GR R C 4 C IK V 4 VSV (EVAP) V 9 VSV (VAPOR PRESSURE SENSOR) 4 3 E EGR GAS TEMP. SENSOR E 3 ENGINE COOLANT TEMP. SENSOR Y G P STOP LIGHT S A (*) (*) A (*) (*) E A, E 6, E C, E D ENGINE CONTROL MODULE M MASS AIR FLO METER
3 ENGINE CONTROL (RZ FE) FROM POER SOURCE SYSTEM (SEE PAGE 44) A A/C AMPLIFIER L Y 3 IJ IJ L Y 3 L L TO TACHOMETER [COM. METER] (*3) (*3) IK IK3 0 3C 6 3C 3 IF 0A PANEL I IGNITION COIL AND IGNITER NO. L Y Y Y I IGNITION COIL AND IGNITER NO. A 6 A AC ACT D TAC ELS E A, E 6, E C, E D ENGINE CONTROL MODULE Y 3 D D D IGT IGF IGT IDLO VTA 4 D 0 C VCC C PTNK 0 RSO RSC EGR D 6 D C KNK C C TE O HT C D L FROM CRUISE CONTROL ECU Y R Y 3 3 T THROTTLE POSITION SENSOR V VAPOR PRESSURE SENSOR 3 V 3 VSV (EGR) I IDLE AIR CONTROL VALVE P K KNOCK SENSOR E 4 V 3 TE D DATA LINK CONNECTOR + E H 3 HEATED OYGEN SENSOR (ANK SENSOR ) R 3 4
4 FROM POER SOURCE SYSTEM (SEE PAGE 44) * : / CRUISE CONTROL * : /O CRUISE CONTROL * 3 : / TACHOMETER * 4 : /O TACHOMETER 0A GAUGE C CRANKSHAFT POSITION SENSOR 3 C CAMSHAFT POSITION SENSOR G O(*) O 4 3D 9 3D G R L Y G O(*) G O(*) G O(*) 3D 0 3D (*3) 6 3D (*4) 3D 6 NE NE O HT 3 C D R E E0 E0 E03 4 D 3 D G E A, E 6, E C, E D ENGINE CONTROL MODULE 6 D D G 4 A V R A SP G O (*) 3 A SPEEDOMETER (*4) (*4) A C0 A, C3 D COMINATION METER (*3) (*4) CONTROL CIRCUIT (*3) A A L IK 6 IK L (*3) O A (*4) D (*3) 9 V R A MALFUNCTION INDICATOR LAMP 4 P O O IK H 4 HEATED OYGEN SENSOR (ANK SENSOR ) V0 VEHICLE SPEED SENSOR P 6 E EF ID
5 ENGINE CONTROL (RZ FE) SYSTEM OUTLINE The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission, etc. An outline of engine control is given here.. INPUT SIGNAL () Engine coolant temp. signal system The engine coolant temp. sensor detects the engine coolant temp. and has a built in thermistor with a resistance which varies according to the water temp. Thus the water temp. is input in the form of a control signal to TERMINAL TH of the engine control module. () Intake air temp. signal system The intake air temp. sensor is installed inside the mass air flow meter and detects the intake air temp., which is input as a control signal to TERMINAL THA of the engine control module. (3) Heated oxygen sensor signal system The oxygen density in the exhaust emissions is detected and input as a control signal to TERMINAL O or O of the engine control module. To maintain stable detection performance by the heated oxygen sensor, a heater is used for warming the sensor. The heater is also controlled by the engine control module (HT or HT). (4) RPM signal system Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor, camshaft position is input as a control signal to TERMINAL G of the engine control module, and engine RPM is input to TERMINAL NE. () Throttle signal system The throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINAL VTA of the engine control module. (6) Vehicle speed signal system The vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINAL SP of the engine control module via the combination meter. () A/C S signal system The operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC of the engine control module. () attery signal system Voltage is constantly applied to TERMINAL ATT of the engine control module. hen the ignition S is turned to on, voltage for engine control module operation is applied via the EFI relay to TERMINAL + of the engine control module. (9) Intake air volume signal system Intake air volume is detected by the mass air flow meter and a signal is input into TERMINAL VG of the engine control module as a control signal. (0) Stop light S signal system The stop light S is used to detect whether or not the vehicle is braking and the information is input as a control signal to TERMINAL K of the engine control module. () Starter signal system To confirm that the engine is cranking, the voltage applied to the starter motor during cranking is detected and is input as a control signal to TERMINAL STA of the engine control module. () Engine knock signal system Engine knocking is detected by the knock sensor and input as a control signal to TERMINAL KNK of the engine control module.
6 . CONTROL SYSTEM SFI system The SFI system monitors the engine conditions through the signals (Input signals ( to ) ) input from each sensor to the engine control module. ased on this data and the program memorized in the engine control module, the most appropriate fuel injection timing is decided and current is output to TERMINALS #0, #0, #30 and #40 of the engine control module, causing the injectors to operate (to inject fuel). It is this system which, through the work of the engine control module, finely controls fuel injection in response to driving conditions. Electronic spark advance system The ESA system monitors the engine conditions using the signals (input signals (, 4, to, 9,, ) ) input to the engine control module from each sensor. ased on this data and the program memorized in the engine control module, the most appropriate ignition timing is decided and current is output to TERMINALS IGT and IGT of the engine control module. This output controls the igniter to produce the most appropriate ignition timing for the driving conditions. Heated oxygen sensor heater control system The heated oxygen sensor heater control system turns the heater to on when the intake air volume is low (Temp. of exhaust emissions low), and warms up the heated oxygen sensor to improve detection performance of the sensor. The engine control module evaluates the signals (Input signals (, 4,, 9, ) ) from each sensor, current is output to TERMINAL HT or HT and controls the heater. EGR cut control system The EGR cut control system controls the VSV (EGR) by evaluating the signals from each sensor input to the engine control module (Input signals (, 9) ) and by sending output to TERMINAL EGR of the engine control module. 3. DIAGNOSIS SYSTEM ith the diagnosis system, when there is a malfunction in the ECU signal system, the malfunctioning system is recorded in the memory. The malfunctioning system can then be found by reading the display (Code) of the malfunction indicator lamp. 4. FAIL SAFE SYSTEM hen a malfunction occurs in any system, if there is a possibility of engine trouble being caused by continued control based on the signals from that system, the fail safe system either controls the system by using data (Standard values) recorded in the engine control module memory or else stops the engine.
7 ENGINE CONTROL (RZ FE) SERVICE HINTS EFI RELAY [R/ NO.] 3 : Closed with ignition S at ON or ST position C6 CIRCUIT OPENING RELAY : Closed with starter running or engine running I6, I, I, I9 INJECTOR : Ω T THROTTLE POSITION SENSOR 3 :0. 0. kω with clearance between lever and stop screw 0 mm (0 in.) :4 9 kω E3 ENGINE COOLANT TEMP. SENSOR :0 0 kω ( 0 C, 4 F) 4 kω (0 C, 3 F) 3 kω (0 C, 6 F) kω (40 C, 04 F) kω (60 C, 40 F) kω (0 C, 6 F) E (A), E6 (), E (C), E (D) ENGINE CONTROL MODULE Voltage at engine control module wiring connectors + E : 9 4 volts (Ignition S on) ATT E : 9 4 volts (Always) VCC E : 4.. volts (Ignition S on ) VTA E volts (Ignition S on and throttle valve fully closed) volts (Ignition S on and throttle valve fully open) STA E : 6 volts or more (Ignition S at ST position) E : 9 4 volts (No trouble and engine running) THA E : volts (Ignition S on and intake air temp. 0 C, 6 F) TH E : 0..0 volts (Ignition S on and coolant temp. 0 C,6 F) SP E : Plus generation with vehicle moving K E :. 4 volts (Stop light S on) IGT, IGT E : Plus generator (Cranking or idling) #0, #0, #30, #40 E : 9 4 volts (Ignition S on) RESISTANCE AT ECU IRING CONNECTOR (Disconnect wiring connector) VTA E : kω (Throttle valve fully open) kω (Throttle valve fully closed) THA E : 3 kω (Intake air temp. 0 C, 6 F) TH E : kω (Coolant temp. 0 C, F) + E : kω NE E : 40 0 Ω : PARTS LOCATION Code See Page Code See Page Code See Page A 30 E D 3 J0 9 C (RZ FE) F 3 J 3 C (RZ FE) F 3 K 9 (RZ FE) C6 30 H3 (RZ FE) M 9 (RZ FE) C9 30 H4 (RZ FE) P 9 (RZ FE) C0 A 30 I 9 (RZ FE) A 3 S C3 D 30 I6 9 (RZ FE) 3 D (RZ FE) I 9 (RZ FE) T 9 (RZ FE) D 30 I 9 (RZ FE) V3 9 (RZ FE) E (RZ FE) I9 9 (RZ FE) V4 9 (RZ FE) E3 (RZ FE) I4 3 V 9 (RZ FE) E A 3 I 9 (RZ FE) V9 9 (RZ FE) E6 3 I 9 (RZ FE) V0 9 (RZ FE) E C 3 J9 A 9
8 : RELAY LOCKS Code See Page Relay locks (Relay lock Location) 9 R/ No. (Engine Compartment Left) : JUNCTION LOCK AND IRE HARNESS CONNECTOR Code See Page Junction lock and ire Harness (Connector Location) 0 Cowl ire and J/ No. (Lower Finish Panel) F 0 Engine Room Main ire and J/ No. (Lower Finish Panel) 3A 3C 3D 3F Cowl ire and J/ No.3 (ehind the Instrument Panel Left) : CONNECTOR JOINING IRE HARNESS AND IRE HARNESS Code See Page Joining ire Harness and ire Harness (Connector Location) IF 3 Engine Room Main ire and Cowl ire (Left Kick Panel) IJ 3 Cowl ire and A/C Sub ire (ehind the Glove ox) IK IK3 3 Engine ire and Cowl ire (Right Kick Panel) N 40 Frame ire and Cowl ire (Under the Driver s Seat) : GROUND POINTS Code See Page Ground Points Location EA 36 Front Left Fender E 36 Near the Throttle ody EF 36 Ignition Coil racket ID 3 Left Kick Panel IE 3 Around the Right Edge of the Reinforcement IG 3 Around the Left Edge of the Reinforcement : SPLICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points E4 36 Engine Room Main ire I9 3 Engine ire A C C C6 LACK DARK GRAY DARK GRAY C C0 (A) (w/ Tachometer) ON C0 (A) (w/o Tachometer) ON
9 ENGINE CONTROL (RZ FE) C3 (D) (w/ Tachometer) LUE D LACK 3 D E E3 LACK DARK GRAY DARK GRAY E (A) E6 () E (C) E (D) F (See Page 0) F H3, H4 I I6, I, I, I9 DARK GRAY DARK GRAY LACK LUE I I, I J9 (A) LACK GRAY J0 () J (A/T) LUE 3 4 E E E D D D (Hint : See Page ) (Hint : See Page ) (Hint : See Page ) J (M/T) LUE K DARK GRAY M LACK P GRAY (Hint : See Page )
10 S (A) (w/ Cruise Control) S () T V3 V4 (w/o Cruise Control) LACK LACK GREEN LACK 3 V V9 V0 LACK LUE LACK 3 3
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