ENGINE CONTROL MR2 (EWD498U) R W R W R W B 7 IC1 I10 IGNITION SW R W W R W R 40A MAIN ST 5 AM2 C/OPN RELAY 7. 5A RELAY B Y B Y B L B R G R B Y

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1 ENGINE CONTRO 5 M IG 6 R IC R 7 R 0 R R IC I0 IGNITION S ST 4 R 7 IC R R M 40 MIN ST REY 7. 5 ST C/OPN REY 3 3 R F FUE PUMP R 4 5 Y (*) Y (*) 0 I3 Y (*) F MIN. 0 C 9 CUTCH STRT S M TTERY (*) I K Y (*) MR (ED498U)

2 7 7 R * : SEQUENTI MNU TRNSMISSION * : M/T R 7. 5 EFI R 5 C R R R R R R FROM POER SOURCE SYSTEM (SEE PGE 46) Y R 5 EFI 5 IG Y Y R R 9 R 0 C 5 EFI MIN REY 5 IG REY R R 3 3 E GR R 8 C R R I 6 INJECTOR NO. R I 7 INJECTOR NO. R I 8 INJECTOR NO. 3 R I 9 INJECTOR NO. 4 R R E 3 R N NOISE FITER (IGNITION) R R R R R R R GR Y (*) E Y (*) 003 MR (ED498U) 57

3 ENGINE CONTRO R R 5 C (*) R R (*) (*) R R R Y R R Y V VSV (CNISTER COSED VVE) V VSV (EVP) V 4 VSV (PRESSURE SITCHING VVE) R 3 G VISC DUTY (*) GND I IDE IR CONTRO VVE Y G FROM FN NO. 3 REY FROM FN NO. REY FROM /C COMP REY TO /C MGNETIC CUTCH ND OCK SENSOR R TO /C DU PRESSURE S D 4 C IGS TT + ST CCV EVP 3 8 D TP RSO 3 4 CF FN 8 8 CMG CKI PRE E, E 3 ENGINE CONTRO MODUE, E 4 C, E 5 D # 40 # 30 #0 # 0 IGT IGT IGT3 4 D 3 D D D 0 D D D IGT4 3 D IGF 5 D Y Y Y Y 0 Y Y Y Y R I IGNITION COI ND IGNITER NO. R 4 I 3 IGNITION COI ND IGNITER NO. R 4 I 4 IGNITION COI ND IGNITER NO. 3 R 4 I 5 IGNITION COI ND IGNITER NO. 4 R R R E 4 R GR Y (*) EC GR Y (*) MR (ED498U)

4 R R R R (*) (*) M MSS IR FO METER R 5 + E R (*) E T THROTTE POSITION SENSOR R (*) R V 3 VPOR PRESSURE SENSOR VT VC EG TH VG VCC PTNK E T THROTTE POSITION SENSOR 4 3 R (*) * : SEQUENTI MNU TRNSMISSION * : M/T * 3 : SHIEDED 8 CCE POSITION SENSOR R R R (*) Y G (*) Y (*) R (*) (*) R (*) R G R Y G (*) 0 (*) R (*) 6 C3 R R R Y V R (*) R (*) 0 R (*) 0 R (*) G C C C 3 C C 3 C 0 C 9 C 4 EVG TH VG VT VC VT VP VP PTNK E, E 3 ENGINE CONTRO MODUE, E 4 C, E 5 D MRE FC STD R MOPS OCV+ OCV F/PS 3 0 C D 4 D 3 D 8 C+ 0 D C 7 D M+ 9 D M 9 D GE0 PS PSCT 9 D 5 9 GR Y (*) Y Y R 5 IC S 5, S 6 SHORT CONNECTOR (SRS NO. ) Y R (*) (*) R (*) G (*) GR (*) 0 O 4 I3 5 I3 O G G 6 G GENERTOR O OI PRESSURE S C CMSHFT TIMING OI CONTRO VVE 3 GS C 5 CENTER IRG SENSOR SSEMY 3 4 IDUP EFI P 7 POER STEERING ECU GR Y (*) T 7 THROTTE CONTRO MOTOR 003 MR (ED498U) 59

5 ENGINE CONTRO R R (*) R FROM POER SOURCE SYSTEM (SEE PGE 46) G R E ENGINE COONT TEMP. SENSOR R 5 ETCS 3 5 STOP F D G J 3, J 4 JUNCTION CONNECTOR R R R R H HETED OXYGEN SENSOR (NK SENSOR ) H HETED OXYGEN SENSOR (NK SENSOR ) R S 7 STOP IGHT S 7 IJ G Y 4 C G 3 C C 8 C 9 C HT OX HT OX E, E 3 ENGINE CONTRO MODUE, E 4 C, E 5 D S 6 NE+ NE G KNK 6 C 4 C 5 C 7 D 0 E R Y G 6 STP E03 6 C R R R Y R (*) R R R 5 C3 (*) R (*) (*) R Y (*) 4 C 8 C TH E 6 D +M CN+ CN NEO CSMT 4 D 6 D 5 D 30 D ME0 8 D (*) Y(*) R (*) P (*) I3 R Y 9 TR S SKID CONTRO ECU ITH CTUTOR C 3 CRNKSHFT POSITION SENSOR C CMSHFT POSITION SENSOR K KNOCK SENSOR (*) O(*) CN+ CN NEO CSMT T 9 TRNSMISSION CONTRO ECU EC * : SEQUENTI MNU TRNSMISSION * : M/T * 3 : SHIEDED MR (ED498U)

6 FROM POER SOURCE SYSTEM (SEE PGE 46) 7. 5 OD R R 4 3 H 3 HETED OXYGEN SENSOR (NK SENSOR ) 3 5R R (*) R V Y R R 7 IC V 8 IC V Y R 0 IC IC IC Y R 5 C C HT OX TCH SPD MPX MPX E, E 3 ENGINE CONTRO MODUE, E 4 C, E 5 D E 7 C E0 NS E0 TC SI 3 D 7 D 5 R R R 0 R R R 4 (*) C3 (*) N 3 NEUTR STRT S 4 P P P 3 IC3 6F 6E TC G 5 IC3 G 6F 6E G D DT INK 7 CONNECTOR 3 6 SI T (*) R R R (*) 4 CG SG J 5 JUNCTION CONNECTOR 0 (*) R R R R C IC E IE 003 MR (ED498U) 6

7 ENGINE CONTRO FROM POER SOURCE SYSTEM (SEE PGE 46) * 4 : MFUNCTION INDICTOR MP V Y R R 7. 5 GUGE 3 5 C C 0 8 R (*4) Y R V R SPEEDOMETER TCHOMETER C0, C, C C COMINTION METER IE MR (ED498U)

8 SYSTEM OUTINE This system utilizes an engine control module and maintains overall control of the engine and so on. n outline of the engine control is explained here.. INPUT SIGNS () Engine coolant temp. signal circuit The engine coolant temp. sensor detects the engine coolant temp. and has a built in thermistor with a resistance which varies according to the engine coolant temp. The engine coolant temp. is input into TERMIN TH of the engine control module as a control signal. () Intake air temp. signal circuit The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a control signal to TERMIN TH of the engine control module. (3) Oxygen sensor signal circuit The oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensors (ank sensor, bank sensor, bank sensor ) to TERMINS OX, OX, OX of the engine control module. To stabilize detection performance by the heated oxygen sensors, the heated oxygen sensors are warmed. This heater is also controlled by the engine control module (HT, HT, HT). (4) RPM signal circuit Camshaft position is detected by the camshaft position sensor and its signal is input to TERMIN G of the engine control module as a control signal. lso, the engine RPM is detected by the crankshaft position sensor installed in the cylinder block and the signal is input into TERMIN NE+ of the engine control module as a control signal. (5) Throttle signal circuit The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMIN VT, VT of the engine control module. (6) Vehicle speed circuit The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into TERMIN SPD of the engine control module. (7) /C S signal circuit The operating voltage of the /C magnetic clutch is detected and the signal is input into TERMIN CMG of the engine control module as a control signal. (8) attery signal circuit Voltage is constantly applied to TERMIN TT of the engine control module. ith the ignition S turned on, Voltage for engine control module start up power supply is applied to TERMIN + of the engine control module via the EFI MIN relay. (9) Intake air volume signal circuit Intake air volume is detected by the mass air flow meter and the signal is input to TERMIN VG of the engine control module as a control signal. (0) Stop light S signal circuit The stop light S is used to detect whether or not the vehicle is braking and the signal is input into TERMIN STP of the engine control module as a control signal. () Starter signal circuit To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the signal is input into TERMIN ST of the engine control module as a control signal. () Engine knock signal circuit Engine knocking is detected by knock sensor and the signal is input into TERMIN KNK as a control signal. 003 MR (ED498U) 63

9 ENGINE CONTRO. CONTRO SYSTEM SFI system The SFI system monitors the engine condition through the signals input from each sensor to the engine control module. The best fuel injection timing is decided based on this data and the program memorized by the engine control module, and the control signal is output to TERMINS #0, #0, #30 and #40 of the engine control module to operate the injector (Inject the fuel). The sequential multiport fuel injection (Electronic fuel injection) system controls the fuel injection operation by the engine control module in response to the driving conditions. ES system The ES system monitors the engine condition through the signals input to the engine control module from each sensor. The best ignition timing is decided according to this data and the memorized data in the engine control module, and the control signal is output to TERMINS IGT, IGT, IGT3 and IGT4. This signal controls the igniter to provide the best ignition timing for the driving conditions. Heated oxygen sensor heater control system The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaust emissions is low), and warms up the heated oxygen sensors (ank sensor, bank sensor, bank sensor ) to improve detection performance of the sensors. The engine control module evaluates the signals from each sensor, and outputs current to TERMINS HT, HT, HT to control the heater. 3. DIGNOSIS SYSTEM ith the diagnosis system, when there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in the memory. The malfunctioning system can be found by reading the code displayed by the malfunction indicator lamp. 4. FI SFE SYSTEM hen a malfunction has occurred 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 MR (ED498U)

10 SERVICE HINTS E (), E3 (), E4 (C), E5 (D) ENGINE CONTRO MODUE TT E : lways volts + E : volts (Ignition S at ON position) VC E : volts (Ignition S at ON position) VT E : volts (Ignition S ON and throttle valve fully closed) volts (Ignition S ON and throttle valve open) VT E : volts (Ignition S ON and throttle valve fully closed) volts (Ignition S ON and throttle valve open) TH E : 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) ST E : volts (Engine cranking) E : volts (No trouble and engine running) STP E : volts (rake pedal depress) RSO E : volts (Ignition S at ON position) IGT, IGT, IGT3, IGT4 E : 0.8. volts (Engine cranking or idling) #0, #0, #30, #40 E0, E0 : volts (Ignition S at ON position) RESISTNCE OF ECU IRING CONNECTORS (Disconnect wiring connector) VT E : kω (Throttle valve fully open) kω (Throttle valve fully closed) VT E : kω (Throttle valve fully open) kω (Throttle valve fully closed) VC E : kω TH E : kω (Intake air temp. 0 C, 68 F) TH E : kω (Coolant temp. 80 C, 76 F) RSO E : Ω C/OPN REY 5 3 : Closed with the starter cranking and engine running EFI MIN REY 3 5 : Closed with the ignition S at ON or ST position E ENGINE COONT TEMP. SENSOR : kω ( 0 C, 4 F) k Ω (0 C, 3 F) kω (0 C, 68 F) kω (40 C, 04 F) kω (60 C, 40 F) kω (80 C, 76 F) 003 MR (ED498U) 65

11 ENGINE CONTRO : PRTS OCTION Code See Page Code See Page Code See Page 8 30 H 30 M 3 C 30 H 30 N 3 C 30 H3 30 N3 3 C3 30 I 30 O 3 C5 3 I 30 P7 35 C9 3 I3 30 S5 33 C0 3 I4 30 S6 33 C 3 I5 30 S7 33 C C 3 I6 30 S 35 D 3 I7 30 T 3 E 30 I8 30 T7 3 E 34 I9 30 T9 35 E3 34 I0 33 V 3 E4 C 34 J3 33 V 3 E5 D 34 J4 33 V3 35 F 34 J5 35 V4 35 G 30 K 3 : REY OCKS Code See Page Relay locks (Relay lock ocation) Fusible ink lock (Engine Compartment eft) 3 Engine Room R/ (eft Side of Room Partition Panel) 3 4 R/ No.3 (eft Side of Instrument Panel),,,,,, : JUNCTION OCK ND IRE HRNESS CONNECTOR Code See Page Junction lock and ire Harness (Connector ocation) 6E 6F 6 Instrument Panel ire and J/ No.6 (Instrument Panel race H) : CONNECTOR JOINING IRE HRNESS ND IRE HRNESS Code See Page Joining ire Harness and ire Harness (Connector ocation) E 36 Engine No.4 ire and Engine ire (Near the Generator) I3 38 Engine Room Main ire and uggage Room ire (eft Kick Panel) IC IC 38 Engine Room Main ire and Instrument Panel ire (eft Kick Panel) IC3 IJ 40 Floor ire and Instrument Panel ire (Right Kick Panel) 4 Engine Room Main ire and Floor ire (Right Side of Room Partition Panel) 4 Engine Room No.4 ire and Engine Room Main ire (eft Side of Room Partition Panel) C C 4 Engine ire and Engine Room Main ire (Quarter Panel H) C3 : GROUND POINTS Code See Page Ground Points ocation E 36 Suspension Tower Rear H E EC 36 Engine lock H IE 38 eft Kick Panel I 4 Suspension Tower Front RH K 4 Under the Center Pillar RH MR (ED498U)

12 : SPICE POINTS Code See Page ire Harness with Splice Points Code See Page ire Harness with Splice Points E 9 4 Engine Room Main ire E3 36 Engine ire 0 E4 4 Engine ire 7 4 Engine Room Main ire 003 MR (ED498U) 67