ENGINE CONTROL (3RZ-FE)

Transcription

1 ENGINE CONTO (3Z-FE) IF - 7 AM IG 3 I FOM POE SOUCE SYSTEM (SEE PAGE 4) AM ACC IG 7. A STA 7. A IGN 0A EFI 7. A OD 0A STOP ST 30A AM P PAK/NEUTA POSITION S 40A AM 0A AT I4 IGNITION S P N 8 IK IK3 9 (M/T) 0 C 9 CUTCH STAT S - F (M/T) 3 - O - O F IF 3 EFI EAY D 7 DATA INK CONNECTO 3 3 TC 9 - TAC FOM COMINATION METE V V V AT CG 4 IF 3A 3A 3 7 SG SI IK F J JUNCTION CONNECTO N 4 I 3 M C CICUIT OPENING EAY F 8 FUE PUMP ATTEY D E A J 9 A, J0 JUNCTION CONNECTO - IK N - - EA IE EF IG TOYOTA TACOMA (ED440U)

2 - IK IK IF S STOP IGHT S 7 G- G- 3F 3F I INJECTO NO. - I 7 INJECTO NO. - I 8 INJECTO NO. 3 - I 9 INJECTO NO P0 POE STEEING OI PESSUE S Y A A 7 A A D D 3 D 4 D SI ATT TC STP NS # 0 # 0 # 30 # 40 8 PSS E A, E ENGINE CONTO MODUE, E 7 C, E 8 D 7 IF 4 3 I4 C - G EVP V 4 VSV (EVAP) 7 C A 7 A C 4 C C G- TPC V 9 VSV (VAPO PESSUE SENSO) + - FC - STA M MASS AI FO METE - EVG G VG 4 3 Y- G THA E 8 C 9 C C P- THG E EG GAS TEMP. SENSO TH G- E 3 ENGINE COOANT TEMP. SENSO 3 IK TOYOTA TACOMA (ED440U) 79

3 ENGINE CONTO (3Z-FE) 0 A A/C CONTO ASSEMY 9 TO ADD DETECTION S [ADD ACTUATO] TO DETECTION S (TANSFE 4 POSITION) TO TACHOMETE [COM. METE] I0 IGNITION COI AND IGNITE NO. 3 I IGNITION COI AND IGNITE NO. 3 I IGNITION COI AND IGNITE NO. 3 3 I3 IGNITION COI AND IGNITE NO Y - G- (4D) G (4D A/T) - - (*) (*) IK Y 3 A 4 A 0 9 A D AC ACT 4D 4 TAC IGT 3 D IGT 0 D IGF 3 D IGT3 4 D IGT4 E A, E ENGINE CONTO MODUE, E 7 C, E 8 D IDO VTA 9 C VC C 8 PTNK E04 D SD EG D C AFHT AF+ 4 C C AF- 0 C KNK 8 D - Y - Y - - (SHIEDED) V P TO CUISE CONTO ECU 3 3 T THOTTE POSITION SENSO V 8 VAPO PESSUE SENSO 3 V 3 VSV (EG) I IDE AI CONTO VAVE D DATA INK CONNECTO + E 3 A3 AI FUE ATIO SENSO (ANK SENSO ) 3 4 (SHIEDED) K KNOCK SENSO EF TOYOTA TACOMA (ED440U)

4 FOM POE SOUCE SYSTEM (SEE PAGE 4) * : / TACHOMETE * : /O TACHOMETE FOM POE SOUCE SYSTEM (SEE PAGE 4) 0A TAI 0A GAUGE G- G- G 4 E F 3C 0 3C (SHIEDED) C CANKSHAFT POSITION SENSO G G 3 E 4 (SHIEDED) C CAMSHAFT POSITION SENSO G G- O G- O 4 3D 3D G- O F 3D 3D 7 3D - 0 A ES C 4 C C A NE+ NE- G+ SP E A, E ENGINE CONTO MODUE, E 7 C, E 8 D C0 COMINATION METE SPEEDOMETE (*) 3 (*) (*) (*) (*) CONTO CICUIT (*) MAFUNCTION INDICATO AMP OXS HTS E E0 E0 E03 0 C 3 C 7 C D 3 D D A V- G- V- - IK 4 IK7 0 IK IK IK (SHIEDED) 3 4 H 9 HEATED OXYGEN SENSO (ANK SENSO ) 7 3 G- P 3 (SHIEDED) I - 4 IK 0 IK7 9 3 V0 VEHICE SPEED SENSO EF ID 00 TOYOTA TACOMA (ED440U) 8

5 ENGINE CONTO (3Z-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 SIGNA () 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 TEMINA 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 TEMINA THA of the engine control module. (3) Heated oxygen sensor signal system The oxygen density in exhaust emissions is detected and input as a control signal to TEMINA 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). (4) PM 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 TEMINA G+ of the engine control module, and engine PM is input to TEMINA NE+. () Throttle signal system The throttle position sensor detects the throttle valve opening angle, which is input as a control signal to TEMINA VTA of the engine control module. () Vehicle speed signal system The vehicle speed sensor detects the vehicle speed and inputs a control signal to TEMINA 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 TEMINA AC of the engine control module. (8) attery signal system Voltage is constantly applied to TEMINA 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 TEMINA + 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 TEMINA 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 TEMINA 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 TEMINA 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 TEMINA KNK of the engine control module. (3) 4D signal system hether or not the vehicle is operating in 4D mode is determined, and a control signal is input to TEMINA 4D of the engine control module. (4) Air fuel ratio signal system The air fuel ratio is detected and input as a control signal into TEMINA AF+ of the engine control module TOYOTA TACOMA (ED440U)

6 . CONTO SYSTEM SFI system The SFI system monitors the engine conditions through the signals (Input signals ( to 3) ) 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 TEMINAS #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 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 TEMINAS IGT, IGT, IGT3 and IGT4 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, 8, 9, ) ) from each sensor, current is output to TEMINA HTS and controls the heater. 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. 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 (ED440U) 83

7 ENGINE CONTO (3Z-FE) SEVICE HINTS EFI EAY -3 : Closed with ignition S at ON or ST position C CICUIT OPENING EAY -3 : Closed with starter running or ignition S at ON or ST position I, I7, I8, I9 INJECTO - : Ω T THOTTE POSITION SENSO - : 4-9 kω E3 ENGINE COOANT TEMP. SENSO - : 0-0 kω (-0 C, -4 F) 4-7 kω (0 C, 3 F) - 3 kω (0 C, 8 F) kω (40 C, 04 F) kω (0 C, 40 F) kω (80 C, 7 F) E (A), E (), E7 (C), E8 (D) ENGINE CONTO MODUE Voltage at engine control module wiring connectors +-E : 9-4 volts (Ignition S on) ATT-E : 9-4 volts (Always) VC-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 : 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, 8 F) TH-E : volts (Ignition S on and coolant temp. 80 C, 7 F) SP-E : Pulse generation with vehicle moving STP-E : Volts (Stop light S on) ESISTANCE AT ECU IING CONNECTO (Disconnect wiring connector) VTA-E : kω (Throttle valve fully open) kω (Throttle valve fully closed) THA-E : - 3 kω (Intake air temp. 0 C, 8 F) TH-E : kω (Coolant temp. 80 C, 78 F) +-E : kω NE+-E : Ω : PATS OCATION Code See Page Code See Page Code See Page A3 3 (3Z-FE) E8 D 3 J9 A 33 (3Z-FE) A 34 3 (Double Cab) J0 33 (3Z-FE) F8 C 3 (3Z-FE) 37 (Except Double Cab) J 3 C 3 (3Z-FE) H9 3 K 33 (3Z-FE) C 34 I 33 (3Z-FE) M 33 (3Z-FE) C9 34 I 33 (3Z-FE) P 33 (3Z-FE) C0 34 I7 33 (3Z-FE) P0 33 (3Z-FE) D 3 (3Z-FE) I8 33 (3Z-FE) S 3 D7 34 I9 33 (3Z-FE) T 33 (3Z-FE) E 3 (3Z-FE) I4 3 V3 33 (3Z-FE) E3 3 (3Z-FE) I0 33 (3Z-FE) V4 33 (3Z-FE) E A 3 I 33 (3Z-FE) V8 33 (3Z-FE) E 3 I 33 (3Z-FE) V9 33 (3Z-FE) E7 C 3 I3 33 (3Z-FE) V0 33 (3Z-FE) TOYOTA TACOMA (ED440U)

8 : EAY OCKS Code See Page elay locks (elay lock ocation) / No. (Engine Compartment eft),,,,,, : JUNCTION OCK AND IE HANESS CONNECTO Code See Page Junction lock and ire Harness (Connector ocation) E 3 Engine oom Main ire and J/ No. (ower Finish Panel) F 3 Cowl ire and J/ No. (ower Finish Panel) I 3 Engine oom Main ire and J/ No. (ower Finish Panel) 3A 3 3C 3D 3F 4 Cowl ire and J/ No.3 (ehind the Instrument Panel eft) : CONNECTO JOINING IE HANESS AND IE HANESS Code See Page Joining ire Harness and ire Harness (Connector ocation) IF 44 Engine oom Main ire and Cowl ire (eft Kick Panel) IK IK3 44 Engine ire and Cowl ire (Above the Glove ox) IK7 N 4 (Double Cab) 48 (Except Double Cab) Frame ire and Cowl ire (Under the Driver s Seat) : GOUND POINTS Code See Page Ground Points ocation EA 4 (3Z-FE) Front eft Fender EF 4 (3Z-FE) Ignition Coil raket ID 44 eft Kick Panel IE 44 Around the ight Edge of the einforcement IG 44 Around the eft Edge of the einforcement : SPICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points E4 4 (3Z-FE) Engine ire I4 I3 44 Cowl ire I 44 Cowl ire 44 Engine ire 00 TOYOTA TACOMA (ED440U) 8