ENGINE CONTROL (2RZ − FE) 2 1 30A AM2 2 2 IF1 17 IF1 25 7. 5A STA 1 2 3E 21 3E 20 3E 22 2 1 P N 6 5 IK3 8 B − R (A/T) IK2 17 3E 8 3E 5 3E 9 7. 5A IGN 1F 15 2 3 1 5 2 2 2 2 15A EFI FROM POWER SOURCE SYSTEM (SEE PAGE 44) 2 2 10A OBD 2 15A STOP 2 2 2 IE EB EB IF1 12 IK2 6 IK2 22 I 9 3A 16 3A 15 3A 14 BN1 9 5 4 IG L L W − B W − B 1 4 5 EA B D A E SG CG BATT SIL 16 2 3 4 5 FUEL PUMP F 8 FUSE BOX F 5 W B − W W − R B − W B − W B − W B − W W − B G − Y BATTERY (M/T) (A/T) W − B W − B CIRCUIT OPENING RELAY C 6 W − R B B − R B IGNITION SW B − R(A/T) PARK/NEUTRAL POSITION SW P 1 CLUTCH START SW C 9 B − R B − R(A/T) G − Y B − R B − W B − Y B − Y V B − Y W W − R W − R W − B W − R W − R V W V EFI RELAY 7 DATA LINK CONNECTOR 3 D 7 (SHIELDED) W − B BR BR W − B W − B BR BR G − Y B − W IK2 5 G − Y G − Y B − W (A/T) BN1 6 I14 40A AM1 2 80A ALT 7 2 6 1 AM1 AM2 ACC IG2 IG1 ST1 W 1 2 2 1 B B JUNCTION CONNECTOR J11 J 9 JUNCTION CONNECTOR B A , J10 B − R (M/T) B − R (A/T) (A/T) B − R M B − R (M/T) IK2 8 IF1 20 IF1 15 3E 4 3E 3 3E 1 3E 2 IF1 7 IK2 16 A 19 SIL A 2 BATT BK A 21 3F 7 3F 6 A 22 # 10 #20 #30 #40 1 2 1 2 1 2 1 2 D 11 D 12 D 10 D 9 I 9 NSW D 3 1 2 1 2 I 9 C 8 A 12 D 14 A 11 EVP STA FC +B B 7 C 2 C 3 C 9 1 2 1 2 C 11 C 4 I 9 I 9 I 9 I 9 TPC VG E3 THA E2 THG THW G − Y B − W W − R W − R W B − Y G − Y B − R B − R(A/T) I 9 I 9 I 9 B − R B − R B − R G − Y B − Y B − R(A/T) W − R W R R − L B − R B − R B − R B − R G − Y G − W G − W INJECTOR NO. 1 I 6 INJECTOR NO. 2 I 7 INJECTOR NO. 3 I 8 INJECTOR NO. 4 I 9 VSV (EVAP) V 4 VSV (VAPOR PRESSURE SENSOR) V 9 ENGINE COOLANT TEMP. SENSOR E 3 EGR GAS TEMP. SENSOR E 1 4 5 2 3 1 W − R W − R W − R W − R W − R W − R W − G GR − G W − R G − Y B − W BR − W GR − R Y − G BR − B P G − R BR − B BR − B BR − B BR − B W − R W − R W − R W − R W − R W − R W − R BR − B BR − B BR − B W − R STOP LIGHT SW B − R B − R * 2 : W/O CRUISE CONTROL * 1 : W/ CRUISE CONTROL MASS AIR FLOW METER M 1 B − R B 2 (* 2) A 2 (* 1) A 1 (* 1) B 1 (* 2) (SHIELDED) E 5 ENGINE CONTROL MODULE B A , E 6 C E 7 , D E 8 , B S 5 , A ENGINE CONTROL (2RZ − FE) D 4 C 10 ACT AC1 A 7 A 6 FROM CRUISE CONTROL ECU C 1 I 9 I 9 B 10 I 9 D 7 D 6 RSO RSC EGR C 15 2 1 I 9 1 C 12 B B VSV (EGR) V 3 C 7 I 9 I 9 KNK PTNK VCC VTA IDLO IJ1 3 IJ1 2 D 23 D 22 D 17 IGT1 IGT2 IGF 3 8 A/C AMPLIFIER A12 L − Y L − B L − B L − Y 12 3 1 2 1 3 3 2 2 1 3 8 LG − R G − Y G − Y G − Y Y R − Y B − R B P − B BR − B BR − B W − R W − R V − W W − R BR BR − B W − R W − R W − R W − R BR W − R W − R THROTTLE POSITION SENSOR T 1 VAPOR PRESSURE SENSOR V 8 IDLE AIR CONTROL VALVE I 1 BR TE1 +B E1 TE1 DATA LINK CONNECTOR 1 D 1 HT1 OX1 C 5 D 2 HEATED OXYGEN SENSOR (BANK 1 SENSOR 1) H 3 3 1 4 2 W R − B BR W − R (SHIELDED) I 9 I 9 1 4 1 4 2 3 3 2 B − L B − Y B − Y BR − Y BR B − R BR B − R BR B − R BR B − R B − R B − Y IGNITION COIL AND IGNITER NO. 1 I17 IGNITION COIL AND IGNITER NO. 2 I18 E 4 BR (SHIELDED) KNOCK SENSOR 1 K 1 I 9 W − R BR D 15 7 IK2 B B (*3) (*3) TO TACHOMETER [COMB. METER] TAC E 5 ENGINE CONTROL MODULE B A , E 6 C , E 7 D , E 8 10A PANEL FROM POWER SOURCE SYSTEM (SEE PAGE 44) 2 B 2 ELS IK3 7 G − R IF1 8 G − R 3 3C 16 3C 20 G − R G − R 1 OX2 HT2 C 13 D 1 I 9 EB D 13 D 24 I 9 BR BR D 26 I 9 D 25 W A 4 B 6 B 12 I 9 B 11 I 9 A 8 10A GAUGE FROM POWER SOURCE SYSTEM (SEE PAGE 44) 1B 5 3D 19 3D 4 3D 5 3E 14 3E 16 ID 3 1 2 4 2 1 2 1 BR G R Y G − O(* 1) G − O(* 2) G − O(* 2) G − O B − O G − O(* 1) BR B − O (* 1) CRANKSHAFT POSITION SENSOR C 2 CAMSHAFT POSITION SENSOR C 1 NE − SP1 G NE (*3) (* 4) (*4) CONTROL CIRCUIT SPEEDOMETER MALFUNCTION INDICATOR LAMP B R − W BR BR V − R BR BR BR W − R BR BR BR BR BR BR V − R BR BR W − R BR BR E01 E1 E02 E03 HEATED OXYGEN SENSOR (BANK 1 SENSOR 2) H 4 (SHIELDED) (SHIELDED) (SHIELDED) * 2 : W/O CRUISE CONTROL * 1 : W/ CRUISE CONTROL * 3 : W/ TACHOMETER * 4 : W/O TACHOMETER 3 B 5 L BR G − EF BR BR D 1 (* 3) A 5 (* 4) A 3 A 9 A 7 I 9 3D 3D 16 20 (*3) (*4) A 8 A 2 IK2 25 IK2 26 2 3 L G − R L G − R 3D 17 IK2 24 1 VEHICLE SPEED SENSOR V10 P B − O B − O P (*3) (*3) (* 4) E 5 ENGINE CONTROL MODULE B A , E 6 C E 7 , D E 8 , C10 COMBINATION METER D A , C13 BR BR ENGINE CONTROL (2RZ − FE) The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission, etc. An outline of engine control is given here. 1. INPUT SIGNAL (1) 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 THW of the engine control module. (2) 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 OX1 or OX2 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 (HT1 or HT2). (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. (5) 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 SP1 of the engine control module via the combination meter. (7) A/C SW signal system The operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1 of the engine control module. (8) Battery signal system Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned to on, voltage for engine control module operation is applied via the EFI relay to TERMINAL +B 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. (10) Stop light SW signal system The stop light SW is used to detect whether or not the vehicle is braking and the information is input as a control signal to TERMINAL BK of the engine control module. (11) 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. (12) 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. SYSTEM OUTLINE 2. CONTROL SYSTEM ∗ SFI system The SFI system monitors the engine conditions through the signals (Input signals (1 to 12) ) input from each sensor to the engine control module. Based 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 #10, #20, #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 (1, 4, 5 to 7, 9, 11, 12) ) input to the engine control module from each sensor. Based 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 IGT1 and IGT2 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 (1, 4, 8, 9, 11) ) from each sensor, current is output to TERMINAL HT1 or HT2 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 (1, 9) ) and by sending output to TERMINAL EGR of the engine control module. 3. DIAGNOSIS SYSTEM With 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 When 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. ENGINE CONTROL (2RZ − FE) EFI RELAY [R/B NO.2] 5 − 3 : Closed with ignition SW at ON or ST position C6 CIRCUIT OPENING RELAY 1 − 2 : Closed with starter running or engine running I6, I7, I8, I9 INJECTOR 1 − 2 : 13.4 − 14.2 Ω T1 THROTTLE POSITION SENSOR 3 − 1 : 0.2 − 0.8 k Ω with clearance between lever and stop screw 0 mm ( 0 in.) 2 − 1 : 4 − 9 k Ω E3 ENGINE COOLANT TEMP. SENSOR 1 − 2 : 10 − 20 k Ω ( − 20 ° C, − 4 ° F) 4 − 7 k Ω ( 0 ° C, 32 ° F) 2 − 3 k Ω ( 20 ° C, 68 ° F) 0.9 − 1.3 k Ω ( 40 ° C, 104 ° F) 0.4 − 0.7 k Ω ( 60 ° C, 140 ° F) 0.2 − 0.4 k Ω ( 80 ° C, 176 ° F) E5 (A), E6 (B), E7 (C), E8 (D) ENGINE CONTROL MODULE Voltage at engine control module wiring connectors +B − E1 : 9 − 14 volts (Ignition SW on) BATT − E1 : 9 − 14 volts (Always) VCC − E2 : 4.5 − 5.5 volts (Ignition SW on ) VTA − E2 0.3 − 0.8 volts (Ignition SW on and throttle valve fully closed) 3.2 − 4.9 volts (Ignition SW on and throttle valve fully open) STA − E1 : 6 volts or more (Ignition SW at ST position) W − E1 : 9 − 14 volts (No trouble and engine running) THA − E2 : 0.5 − 3.4 volts (Ignition SW on and intake air temp. 20 ° C, 68 ° F) THW − E2 : 0.2 − 1.0 volts (Ignition SW on and coolant temp. 80 ° C, 176 ° F) SP1 − E1 : Plus generation with vehicle moving BK − E1 : 7.5 − 14 volts (Stop light SW on) IGT1, IGT2 − E1 : Plus generator (Cranking or idling) #10, #20, #30, #40 − E1 : 9 − 14 volts (Ignition SW on) RESISTANCE AT ECU WIRING CONNECTOR (Disconnect wiring connector) VTA − E2 : 3.3 − 10 k Ω (Throttle valve fully open) 0.2 − 0.8 k Ω (Throttle valve fully closed) THA − E2 : 2 − 3 k Ω (Intake air temp. 20 ° C, 68 ° F) THW − E2 : 0.2 − 0.4 k Ω (Coolant temp. 80 ° C, 178 ° F) +B − E1 : 0.2 − 0.4 k Ω NE − E1 : 140 − 180 Ω : PARTS LOCATION Code See Page Code See Page Code See Page A12 30 E8 D 31 J0 B 29 C1 28 (2RZ − FE) F5 31 J11 31 C2 28 (2RZ − FE) F8 32 K1 29 (2RZ − FE) C6 30 H3 28 (2RZ − FE) M1 29 (2RZ − FE) C9 30 H4 28 (2RZ − FE) P1 29 (2RZ − FE) C10 A 30 I1 29 (2RZ − FE) S5 A 31 C13 D 30 I6 29 (2RZ − FE) B 31 D1 28 (2RZ − FE) I7 29 (2RZ − FE) T1 29 (2RZ − FE) D7 30 I8 29 (2RZ − FE) V3 29 (2RZ − FE) E1 28 (2RZ − FE) I9 29 (2RZ − FE) V4 29 (2RZ − FE) E3 28 (2RZ − FE) I14 31 V8 29 (2RZ − FE) E5 A 31 I17 29 (2RZ − FE) V9 29 (2RZ − FE) E6 B 31 I18 29 (2RZ − FE) V10 29 (2RZ − FE) E7 C 31 J9 A 29 SERVICE HINTS : RELAY BLOCKS Code See Page Relay Blocks (Relay Block Location) 2 19 R/B No.2 (Engine Compartment Left) : JUNCTION BLOCK AND WIRE HARNESS CONNECTOR Code See Page Junction Block and Wire Harness (Connector Location) 1B 20 Cowl Wire and J/B No.1 (Lower Finish Panel) 1F 20 Engine Room Main Wire and J/B No.1 (Lower Finish Panel) 3A 22 Cowl Wire and J/B No.3 (Behind the Instrument Panel Left) 3C 3D 3E 3F : CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS Code See Page Joining Wire Harness and Wire Harness (Connector Location) IF1 38 Engine Room Main Wire and Cowl Wire (Left Kick Panel) IJ1 38 Cowl Wire and A/C Sub Wire (Behind the Glove Box) IK2 38 Engine Wire and Cowl Wire (Right Kick Panel) IK3 BN1 40 Frame Wire and Cowl Wire (Under the Driver’s Seat) : GROUND POINTS Code See Page Ground Points Location EA 36 Front Left Fender EB 36 Near the Throttle Body EF 36 Ignition Coil Bracket ID 38 Left Kick Panel IE 38 Around the Right Edge of the Reinforcement IG 38 Around the Left Edge of the Reinforcement : SPLICE POINTS Code See Page Wire Harness with Splice Points Code See Page Wire Harness with Splice Points E4 36 Engine Room Main Wire I9 38 Engine Wire 3 X 8 1 2 1 2 3 4 5 2 1 3 1 2 9 8 7 3 2 X 9 8 7 5 X 3 2 X X A12 BLACK DARK GRAY DARK GRAY (w/ Tachometer) BROWN C9 (w/o Tachometer) BROWN C1 C2 C6 C10 (A) C10 (A) ENGINE CONTROL (2RZ − FE) 16 X X X X X X X X 7 X 5 4 X X X 2 1 X 2 X 4 X 6 7 8 X X 11 12 X X X X X X 19 X 21 22 X 2 X X 5 6 7 X X 10 11 12 1 2 3 4 5 X 7 8 9 10111213 X 15 X 1 2 3 4 X 6 7 X 9 10 11 12 13 14 15 X 17 X X X X 2223 24 25 26 X 4 5 1 2 2 1 3 4 1 2 3 1 2 1 2 X 6 7 X (See Page 20) X X 1 1 1 2 3 4 5 1 2 3 4 E E E D D D X 5 6 X X 3 X X X 8 X X 12 X X X X X X X X X X B B B X X X B B B (w/ Tachometer) BLUE BLACK BLACK DARK GRAY DARK GRAY E6 (B) E8 (D) E7 (C) DARK GRAY DARK GRAY BLACK BLUE I14 E5 (A) F5 C13 (D) D1 D7 E1 E3 F8 H3, H4 I1 I6, I7, I8, I9 DARK GRAY BLACK BLACK GRAY J10 (B) (Hint : See Page 7) (Hint : See Page 7) P1 I17, I18 J9 (A) K1 M1 GRAY J11 J11 (A/T) BLUE (M/T) BLUE (Hint : See Page 7) (Hint : See Page 7) 1 X 2 X 1 2 3 1 2 3 1 2 1 2 1 2 3 1 2 1 2 (w/o Cruise Control) BLACK BLACK GREEN BLUE BLACK BLACK BLACK S5 (B) T1 V3 V4 V8 V9 V10 (w/ Cruise Control) S5 (A)