ENGINE PERFORMANCE – Lexus RX 300 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.0L

3.0L, Engine Performance Wiring Diagram (1 of 4) for Lexus RX 300 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (1 of 4) for Lexus RX 300 2003:

• (dash harn, right side of dash) i11
• (engine harn, e5 right side of engine)
• (front side of engine) counter gear speed sensor
• (left rear of engine) left camshaft timing oil control valve
• (right rear of engine) right camshaft timing oil control valve
• Aci1
• Acis
• Afl+
• Afl-
• Afr+
• Afr-
• Braided
• Crankshaft position sensor (front side of engine)
• Dsl
• E01
• E02
• E03
• E04
• E05
• E2g
• E6 (engine harn, rear of engine)
• Eb (at right of surge tank)
• Ec (rear side of surge tank)
• Electronically controlled transmission solenoid (in transaxle)
• Engine control module (behind right side of dash)
• Evp1
• Fuel injectors
• Hafl
• Hafr
• I11
• Idle air control valve (on top right rear of engine)
• Igf
• Ignition coils & ignitors
• Igt1
• Igt2
• Igt3
• Igt4
• Igt5
• Igt6
• J/c 10 (behind right side of dash)
• Knkl
• Knkr
• Knock sensor 1 (top right side of engine)
• Knock sensor 2 (top left side of engine)
• Left vvt sensor (left rear of engine)
• Mass airflow meter (near air cleaner housing, on air duct)
• Nc+
• Nc-
• Ne+
• Ne-
• Noise filter (near air cleaner housing)
• Oc1+
• Oc1-
• Oc2+
• Oc2-
• Power steering oil pressure switch (right rear of engine compt)
• Red
• Right vvt sensor (right rear of engine)
• Rso
• Sl1+
• Sl1-
• Sl2+
• Sl2-
• Tha
• Tho
• Thw
• Vta1
• Vv1+
• Vv2+

3.0L, Engine Performance Wiring Diagram (2 of 4) for Lexus RX 300 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (2 of 4) for Lexus RX 300 2003:

• (behind left side of dash) r/b 1
• (dash harn, left side of dash)
• (engine harn, rear of engine)
• (in engine room j/b) r/b 2
• A/f heater relay
• A/f htr fuse 25a
• Acc
• Air fuel ratio sensor (bank 1, sensor 1) (right exhaust manifold)
• Air fuel ratio sensor (bank 2, sensor 1) (left exhaust manifold)
• Am2
• Bi (above left rear axle housing)
• Braided
• Circuit opening relay
• Ec (at rear of surge tank)
• Efi fuse 20a
• Efi relay
• Engine room j/b (on left side of engine compt)
• Fuel pump & sender (on top of fuel tank)
• Heated oxygen sensor (bank 1, sensor 2) (in exhaust, rear of catalytic converter)
• Hot at all times
• Ig2
• Ign fuse 7.5a
• Ignition switch
• Instrument panel j/b (behind left side of dash)
• J/c 10 (behind right side of dash)
• J/c 12 (in left side of luggage compt)
• J/c 2 (in left front of engine compt, behind headlight)
• J/c 3, j/c 4 (behind j3 left kick panel)
• Lock
• P/n
• Park/neutral position switch (on transaxle)
• Red
• St2
• Start
• Starter fuse 7.5a

3.0L, Engine Performance Wiring Diagram (3 of 4) for Lexus RX 300 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (3 of 4) for Lexus RX 300 2003:

• (dash harn, right side of dash)
• (under left side of dash) data link connector 3
• A10
• Bat
• C12
• C14
• Combination meter
• Computer data lines system
• E10
• E11
• Ec (at rear of surge tank)
• Engine coolant temperature sensor (top front of engine)
• Heater fuse 15a
• Hot at all times
• Hot in on or start
• I11
• I12
• I6 (engine harn, rear of engine)
• Instrument panel j/b (behind left side of dash)
• J/b 3 (behind upper center of dash)
• J/b 5 (behind upper left side of dash)
• J/c 10 (behind right side of dash)
• K12
• K13
• Malf ind lamp
• Mpx1
• Mpx2
• O/d off ind
• Obd fuse 7.5a
• Ptnk
• Sil
• Spd
• Stop fuse 20a
• Stoplight switch
• Tac
• Tach
• Throttle position sensor (on throttle body)
• Vapor pressure sensor (under center rear of vehicle)
• Vss
• Vsv (acis 1) (on top center of engine)
• Vsv (acis 2) (on top center of engine)
• Vsv (acm) (on right front center of engine compt)
• Vsv (canister closed valve) (left rear of engine compt)
• Vsv (evap) (on top center of engine)
• Vsv (pressure switching valve) (under center rear of vehicle)

3.0L, Engine Performance Wiring Diagram (4 of 4) for Lexus RX 300 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (4 of 4) for Lexus RX 300 2003:

• (behind left side of dash) cruise control ecu
• (behind upper center of dash) j/b 3
• (behind upper left side of dash) j/c 7
• (dash harn, center of dash) i6
• (dash harn, right side of dash)
• (on left front corner of engine) oil pressure switch
• (on transaxle) turbine speed sensor
• A/c system
• A/t indicator switch (integral to park/neutral position switch) (on transaxle)
• A39
• A40
• Abs & ba & trac & vsc ecu (behind right side a40 of dash)
• Abs & ba & trac & vsc ecu (behind right side of dash)
• Acm1
• Acmg
• Batt
• Body ecu (behind left side of dash)
• Ccv
• Code
• Computer data lines system
• Cooling fans system
• Ect
• Efi+
• Efi-
• Electronically controlled transmission solenoid (in transaxle)
• Eng+
• Eng-
• Engine control module (behind right side of dash)
• Gauge fuse 7.5a
• Generator
• Hot in on or start
• Hts
• I11
• Idl
• Idlo
• If (behind center of dash)
• Igsw
• Ih (right dash brace)
• Imld
• Instrument panel j/b (behind left side of dash)
• J/c 8 (behind right side of dash)
• Ksw
• Lcki
• Mops
• Mpx1
• Mpx2
• Mrel
• Neo
• Nsw
• Nt+
• Nt-
• O/d main switch
• Od1
• Odlp
• Odms
• Oxs
• Pnk
• Pre
• Ptnk
• Red
• Rxck
• Sil
• Slt+
• Slt-
• Spd
• Sta
• Stp
• Tach
• Tbp
• Transponder key amplifier (in steering column)
• Trc+
• Trc-
• Txct
• Unlock warning switch