ENGINE CONTROL (2RZ FE)

Transcription

1 ENINE CONTRO (RZ FE) 7 IF Y R(A/T) 7 AM I 6 I FROM POER SOURCE SYSTEM (SEE PAE ) AM ACC I 7. A STA 7. A IN 0A EFI 7. A OD 0A STOP ST I INITION S 6 0 Y R E E Y R(A/T) O O I Y Y Y O Y Y 0A AM P PARK/NEUTRA POSITION S 0A AM P N IK 8 (A/T) (A/T) Y R IK Y (A/T) 6 (A/T) (M/T) C 9 CUTCH START S E Y R (M/T) EFI REAY O IF J JUNCTION CONNECTOR D 7 DATA INK CONNECTOR C C Y TC 6 IF AT C J JUNCTION CONNECTOR 7 SI S 0A AT 8 E E A R N7 6 A IK M F 8 FUE PUMP R ATTERY J 9 A, J0 JUNCTION CONNECTOR D E A O C 6 CIRCUIT OPENIN REAY N7 EA IE EF I 9 00 TOYOTA TACOMA (ED7U)

2 Y R(A/T) IK I I I Y Y IF Y Y S STOP IHT S 7 6 F F Y R(A/T) I 6 INJECTOR NO. I 7 INJECTOR NO. I 8 INJECTOR NO. R I 9 INJECTOR NO. R P0 POER STEERIN OI PRESSURE S 9 Y Y IK A A 7 A A D D D D SI ATT TC STP NS # 0 # 0 # 0 #0 8 PSS E A, E 6, E 7 C, E 8 D ENINE CONTRO MODUE + EP TP FC STA E THA E TH 6 A 6 C 7 C 6 7 A C C C 8 C C IK6 R Y R E E E 7 IF E I S (EAP) 6 N7 S (PRESSURE SITCHIN AE) M MASS AIR FO METER E ENINE COOANT TEMP. SENSOR IK N7 I I I I I 00 TOYOTA TACOMA (ED7U) 9

3 ENINE CONTRO (RZ FE) FROM POER SOURCE SYSTEM (SEE PAE ) 0A TAI 0 A A/C CONTRO ASSEMY 9 TO TACHOMETER [COM. METER] Y Y I Y (*) R A A D D 0 D 6 E R 6 C FROM CRUISE CONTRO ECU I0 INITION COI AND INITER NO. I INITION COI AND INITER NO. I INITION COI AND INITER NO. R Y I INITION COI AND INITER NO. Y Y Y I 0 C R Y 0 A AC ACT TAC ES IDO IT IT IF D IT D IT E A, E 6, E 7 C, E 8 D ENINE CONTRO MODUE TA C PTNK E0 RSD CC AFHT AF+ AF KNK 9 C C 8 6 D D C C C 0 C 8 D Y I 8 IK6 R Y R R (SHIEDED) P T THROTTE POSITION SENSOR N7 R Y N7 8 APOR PRESSURE SENSOR I IDE AIR CONTRO AE A AIR FUE RATIO SENSOR (ANK SENSOR ) I K KNOCK SENSOR R R S (CANISTER COSED AE) (SHIEDED) I I IK N7 R I R EF TOYOTA TACOMA (ED7U)

4 * : / TACHOMETER * : /O TACHOMETER FROM POER SOURCE SYSTEM (SEE PAE ) I R 0A AUE C CRANKSHAFT POSITION SENSOR R E C CAMSHAFT POSITION SENSOR O (SHIEDED) (SHIEDED) R O R D 9 D D 0 D 7 D I I I 6 C C 0 C OXS C R 7 C R D C A NE+ NE + SP IK IK ENINE CONTRO MODUE (SHIEDED) E A, E 6, E 7 C, E 8 D R HTS E E0 E0 E0 (SHIEDED) H 9 HEATED OXYEN SENSOR (ANK SENSOR ) D D 6 A R R SPEEDOMETER O (*) (*) R (*) CONTRO CIRCUIT R 0 IK 6 IK R C0 COMINATION METER (*) MAFUNCTION INDICATOR AMP (*) (*) R IK R IK IK I 7 0 EHICE SPEED SENSOR R R R 9 R I R I R R R EF ID 00 TOYOTA TACOMA (ED7U) 97

5 ENINE CONTRO (RZ FE) SYSTEM OUTINE 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 SINA () 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 engine coolant temp. is input in the form of a control signal to TERMINA 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 TERMINA THA of the engine control module. () Heated oxygen sensor signal system The oxygen density in the exhaust emissions is detected and input as a control signal to TERMINA OXS 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 (HTS). () 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 TERMINA + of the engine control module, and engine RPM is input to TERMINA NE. () Throttle signal system The throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TERMINA TA of the engine control module. (6) ehicle speed signal system The vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINA SP of the engine control module via the combination meter. (7) 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 TERMINA AC of the engine control module. (8) attery signal system oltage is constantly applied to TERMINA 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 TERMINA + 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 TERMINA 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 TERMINA STP 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 TERMINA 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 TERMINA KNK of the engine control module. () Air fuel ratio signal system The air fuel ratio is detected and input as a control signal into TERMINA AF+ of the engine control module TOYOTA TACOMA (ED7U)

6 . CONTRO 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 TERMINAS #0, #0, #0 and #0 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 (,, to 7, 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 TERMINAS IT, IT, IT and IT 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 (,, 8, 9, ) ) from each sensor, current is output to TERMINA HT and controls the heater.. DIANOSIS 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.. FAI 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. 00 TOYOTA TACOMA (ED7U) 99

7 ENINE CONTRO (RZ FE) SERICE HINTS EFI REAY : Closed with ignition S at ON or ST position C6 CIRCUIT OPENIN REAY : Closed with starter running or ignition S at ON or ST position I6, I7, I8, I9 INJECTOR :.. Ω T THROTTE POSITION SENSOR : 9 kω E ENINE COOANT TEMP. SENSOR : 0 0 kω ( 0 C, F) 7 kω (0 C, F) kω (0 C, 68 F) 0.9. kω (0 C, 0 F) kω (60 C, 0 F) kω (80 C, 76 F) E (A), E6 (), E7 (C), E8 (D) ENINE CONTRO MODUE oltage at engine control module wiring connectors + E : 9 volts (Ignition S on) ATT E : 9 volts (Always) C E :.. volts (Ignition S on ) TA E volts (Ignition S on and throttle valve fully closed)..9 volts (Ignition S on and throttle valve fully open) STA E : 6 volts or more (Ignition S at ST position) E : 9 volts (No trouble and engine running) THA E : 0.. volts (Ignition S on and intake air temp. 0 C, 68 F) TH E : 0..0 volts (Ignition S on and coolant temp. 80 C,76 F) SP E : Plus generation with vehicle moving STP E : 7. volts (Stop light S on) IT, IT E : Plus generator (Cranking or idling) #0, #0, #0, #0 E : 9 volts (Ignition S on) RESISTANCE AT ECU IRIN CONNECTOR (Disconnect wiring connector) TA E :. 0 kω (Throttle valve fully open) kω (Throttle valve fully closed) THA E : kω (Intake air temp. 0 C, 68 F) TH E : kω (Coolant temp. 80 C, 78 F) + E : kω NE+ E : 0 80 Ω : PARTS OCATION Code See Page Code See Page Code See Page A (RZ FE) F8 7 (Except Double Cab) J0 (RZ FE) A H9 J C (RZ FE) I (RZ FE) K (RZ FE) C (RZ FE) I6 (RZ FE) M (RZ FE) C6 I7 (RZ FE) P (RZ FE) C9 I8 (RZ FE) P0 (RZ FE) C0 I9 (RZ FE) S D7 I T (RZ FE) E (RZ FE) I0 (RZ FE) (RZ FE) E A I (RZ FE) 8 7 (Except Double Cab) E6 I (RZ FE) 0 (RZ FE) E7 C I (RZ FE) (RZ FE) E8 D J9 A (RZ FE) 7 (Except Double Cab) TOYOTA TACOMA (ED7U)

8 : REAY OCKS Code See Page Relay locks (Relay lock ocation) R/ No. (Engine Compartment eft),,,,,, : JUNCTION OCK AND IRE HARNESS CONNECTOR Code See Page Junction lock and ire Harness (Connector ocation) E Engine Room Main ire and J/ No. (ower Finish Panel) Cowl ire and J/ No. (ower Finish Panel) I Engine Room Main ire and J/ No. (ower Finish Panel) A C D E F Cowl ire and J/ No. (ehind the Instrument Panel eft) : CONNECTOR JOININ IRE HARNESS AND IRE HARNESS Code See Page Joining ire Harness and ire Harness (Connector ocation) IF Engine Room Main ire and Cowl ire (eft Kick Panel) IK IK Engine ire and Cowl ire (Above the love ox) IK6 N7 8 (Except Double Cab) Frame ire and Cowl ire (Under the Driver s Seat) : ROUND POINTS Code See Page round Points ocation EA (RZ FE) Front eft Fender EF (RZ FE) Ignition Coil raket ID eft Kick Panel IE Around the Right Edge of the Reinforcement I Around the eft Edge of the Reinforcement : SPICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points E (RZ FE) Engine ire I I Cowl ire I Cowl ire I Engine ire 00 TOYOTA TACOMA (ED7U) 0