ENGINE PERFORMANCE – Lexus SC 300 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.0L

3.0L, Engine Performance Wiring Diagrams (1 of 4) for Lexus SC 300 1999

List of elements for 3.0L, Engine Performance Wiring Diagrams (1 of 4) for Lexus SC 300 1999:

• (dash harn, lower right end of dash)
• (engine harn, left side of engine)
• (engine harn, right side of firewall)
• (front side of intake manifold)
• (left rear side of cylinder head)
• (top center of engine) camshaft timing oil control valve
• Acis
• Braided
• Camshaft position sensor (left rear side of engine)
• Cl+
• Cl-
• Conn e15
• Conn e16
• Crankshaft position sensor (right front of engine)
• Dash harn, right side of dash)
• E01
• E02
• E03
• E19
• E21
• E24
• Els2
• Engine control module (behind lower right side of dash)
• Evap
• Evg
• G112
• G131
• G131 (front side of intake manifold)
• G203 (right kick panel)
• Ge01
• Htl
• Htr
• I19
• I21
• I25
• I27 (dash harn, right side of dash)
• Igf
• Igniter (on left front shock tower)
• Ignition coil 1
• Ignition coil 2
• Ignition coil 3
• Igt
• Igt2
• Igt3
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Injector 5
• Injector 6
• Instrument cluster system
• Instrument cluster system (tachometer)
• Knk1
• Knk2
• Knock sensor 1 (left side of engine)
• Knock sensor 2 (left side of engine)
• Mass airflow meter (in air intake duct)
• Me01
• Ne-
• Noise filter (on left front strut tower)
• Nsw
• Ocv+
• Ocv-
• Oxl1
• Oxr1
• Power steering oil pressure switch (left front of engine)
• Red
• Tha
• Throttle control motor (on throttle body)
• Thw
• Vpa
• Vpa2
• Vsv (acis) (left side of engine)
• Vsv (evap) (left rear of engine)
• Vta
• Vta2

3.0L, Engine Performance Wiring Diagrams (2 of 4) for Lexus SC 300 1999

List of elements for 3.0L, Engine Performance Wiring Diagrams (2 of 4) for Lexus SC 300 1999:

• (1999)
• (dash harn, right side of combination meter)
• (dash harn, right side of dash)
• (engine harn, front of left shock tower) e23
• (engine harn, left fender apron)
• (engine harn, left side of engine)
• (engine harn, right side of firewall)
• Acc
• Accel position sensor (right rear side of engine)
• Am1
• Am2
• B18
• Braided
• E20
• E21
• E24
• Efi fuse 30a
• Efi relay
• Engine coolant temperature sensor (left front side of engine)
• Fpc
• Fuel pump (in fuel tank)
• Fuel pump ecu (left side of luggage compartment)
• G100 (front side of left fender)
• G112 (left rear side of cylinder head)
• G131 (front side of intake manifold)
• G308 (lower left "b" pillar)
• Heated oxygen sensor (bank 1 sensor 1) (right front side of engine, in exhaust manifold)
• Heated oxygen sensor (bank 2 sensor 1) (on right side of engine, in exhaust manifold)
• Hot at all times
• Hot w/def relay energized
• Hot w/taillight relay energized
• Htl
• Htr
• I13
• I21 (dash harn, lower right end of dash)
• I25
• I27
• Ig2
• Ign fuse 7.5a
• Ignition switch
• Instrument cluster system
• Junction block 1
• K10
• Lock
• Mirhtr fuse 10a
• Oxl1
• Oxr1
• P/n
• Park/neutral position switch (on transaxle)
• Pnk
• Red
• Relay block 2
• Short connector (behind right side of dash)
• St fuse 7.5a
• St1
• Start
• Starting/charging system
• Tail fuse 7.5a
• Throttle position sensor (on throttle body)

3.0L, Engine Performance Wiring Diagrams (3 of 4) for Lexus SC 300 1999

List of elements for 3.0L, Engine Performance Wiring Diagrams (3 of 4) for Lexus SC 300 1999:

• (dash harn, lower right end of dash) i21
• (dash harn, right end of dash)
• (dash harn, right side of dash)
• (dash harn, top center of dash) i9
• (dash harn, upper left side of dash)
• (left kick panel)
• (under center console)
• A/t indicator switch (integral to park/neutral position switch) (on transmission)
• Abs ecu (right side of dash)
• Braided
• C12
• C13
• C14
• C25
• Combination meter
• D10
• D13
• E12
• E18
• E19
• Electronically controlled transmission pattern select switch
• G112 (left rear side of cyl head)
• G131 (front side of intake manifold)
• G200
• Gauge fuse 10a
• H12
• Heated oxygen sensor (bank 1 sensor 2) (on right side of engine, in exhaust manifold)
• Heated oxygen sensor (bank 2 sensor 2) (on exhaust system, near catalytic converter)
• Hot at all times
• Hot in on or start
• Htl2
• Htr2
• I10
• I17
• I20
• I25
• I27
• Junction block 1
• Junction block 3
• Malfunction indicator light
• Obd fuse 7.5a
• Oxl2
• Oxr2
• Pnk
• Pwr
• Red
• Shift lock ecu
• Snow
• Stop fuse 15a
• Stoplight switch (on brake pedal bracket)
• Vapor pressure sensor (right front corner of engine compt)

3.0L, Engine Performance Wiring Diagrams (4 of 4) for Lexus SC 300 1999

List of elements for 3.0L, Engine Performance Wiring Diagrams (4 of 4) for Lexus SC 300 1999:

• (1999)
• (behind left side of dash) data link connector 3
• (dash harn, top center of dash)
• (engine harn, left side of engine)
• (left kick panel)
• (near left front strut tower) data link connector 1
• (on trans) o/d direct clutch speed sensor
• (on trans) vehicle speed sensor 2
• (right kick panel)
• (under left ashtray)
• (unused pins not shown)
• Acmg
• Air conditioning system
• Anti-lock brakes system
• Anti-theft
• Bat
• Batt
• Braided
• Ccs
• Code
• Conn e17
• Conn e18
• Conn e19
• Conn e20
• Cruise control system
• Data link connector 2 (1998) (left side of dash)
• E18
• E21
• E24
• Electronically controlled transmission solenoid (in transmission)
• Els1
• Eng+
• Eng-
• Engine control module (behind lower right side of dash)
• Eom
• Etcs fuse 15a
• Fpc
• G112 (left rear side of cylinder head)
• G131 (front side of intake mainfold)
• G200
• G200 (left kick panel)
• G203
• G206 (left instrument panel brace)
• G302
• Hot at all times
• Htl2
• Htr2
• I17
• I20
• I26
• I27
• Igsw
• Imld
• Junction block 1
• Junction block 3
• Key unlock warning switch (behind left side of dash)
• Ksw
• Mrel
• Nco+
• Nco-
• Neo
• Oil
• Oxl2
• Oxr2
• Pnk
• Ptnk
• Pwr
• Red
• Relay block 2
• Rspd
• Rxck
• Sil
• Sln+
• Sln-
• Slt+
• Slt-
• Slu+
• Slu-
• Snwi
• Snwo
• Sp2+
• Sp2-
• Sta
• Sti-
• Stp
• Tpc
• Transponder key amplifier (behind left side of dash)
• Trc+
• Trc-
• Txct
• Vsv (vapor pressure sensor) (right front corner of engine compt)