Lexus·Rc300·2018 Lexus RC300·Wiring
Wiring diagram

2018 Lexus RC300 — power distribution

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Power distribution

1 2 2 1 A 50A Q P 50A ALT K H E C B 15A 15A 10A 40A 30A 80A 30A 20A 10A 50A 100A 80A 50A 30A 120A A 50A 80A 80A 50A 120A 150A 50A ENGINE ROOM J/B ASSEMBLY 1 ENGINE ROOM R/B ASSEMBLY 1 BATTERY INSTRUMENT PANEL J/B ASSEMBLY STARTER ASSEMBLY ENGINE ROOM J/B ASSEMBLY 2 SEMICONDUCTOR POWER INTEGRATION ECU ENGINE ROOM R/B ASSEMBLY 2 I1 H1 1F A1 1E C31 D32 B30 C32 1B 1D 1C 1A BLK BLK BLK (OR BLK) BLU LT GRN BLK BLK BLU BLK BLK/ BLK BLK GRN RED BLK LT GRN BLU RED LT GRN LT GRN BLK BLK WHT BLK WHT RED BLK DK GRN BLK/ BLU BLK BLK BLK BLK RED BLK BLK J/B LH-AM FUSE ALT FUSE ENG-AM FUSE P/I-B FUSE D/C CUT FUSE FUEL PMP FUSE MPX-B 1 FUSE PTC HTR 1 FUSE PTC HTR 2 FUSE P/I- AM FUSE J/B LH-B FUSE EPS FUSE ABS 2 FUSE FAN 2 FUSE ENG-B FUSE ABS 1 FUSE HTR FUSE IG1- MAIN FUSE NOISE FILTER FUSE H-LP CLN FUSE FAN 1 FUSE FAN FUSE MIR HTR FUSE STRG HTR FUSE (RIGHT REAR CORNER OF ENGINE COMPT) (RIGHT REAR CORNER OF ENGINE COMPT) (RIGHT REAR CORNER OF ENGINE COMPT) (LEFT END OF DASH) (LEFT SIDE OF ENGINE COMPT) (LEFT SIDE OF ENGINE COMPT) fA (2.0L TURBO) 3.5L 2.0L TURBO (3.5L) (2.0L TURBO) TO INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 5 OF 5) TO ENGINE ROOM J/B ASSEMBLY 2 (DIAGRAM 1 OF 5) TO ENGINE ROOM J/B ASSEMBLY 2 (DIAGRAM 3 OF 5) STARTING/ CHARGING SYSTEM TO EPS-B FUSE (DIAGRAM 2 OF 5) COOLING FANS SYSTEM ENGINE CONTROLS SYSTEM ANTI-LOCK BRAKES SYSTEM ANTI-LOCK BRAKES SYSTEM TO INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 4 OF 5) AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM ELECTRONIC POWER STEERING SYSTEM FROM ENGINE ROOM J/B ASSEMBLY 1 (DIAGRAM 1 OF 5) DOOR LOCKS, ANTI-THEFT, MEMORY, INSTRUMENT CLUSTER, INTERIOR LIGHTS, ELECTRONIC POWER STEERING, COMPUTER DATA LINES, TRANSMISSIONS, ELECTRONIC SUSPENSION, AIR CONDITIONING, NAVIGATION, STARTING/ CHARGING & SOUND SYSTEMS MEMORY SYSTEMS DOOR LOCKS SYSTEM TO HORN FUSE (DIAGRAM 2 OF 5) TO ENGINE ROOM R/B ASSEMBLY 2 (DIAGRAM 3 OF 5) TO ENGINE ROOM R/B ASSEMBLY 2 (DIAGRAM 3 OF 5) WIPER/WASHER SYSTEM AIR CONDITIONING & COOLING FANS SYSTEMS SEATS SYSTEM DEFOGGER SYSTEM
R 10A Q 5A 15A 10A 10A 20A 5A 30A 30A 80A P 40A 30A 5A ENGINE ROOM R/B ASSEMBLY 2 ENGINE ROOM R/B ASSEMBLY 1 INSTRUMENT PANEL J/B ASSEMBLY J/C 1 (A65) J/C 16 (W16) J/C 10 (W13) 9 3 1 7 2 10 8 10 4 12 11 6 5 14 OW1 6 8 10 11 C10 B32 A52 VIO PNK PNK VIO PNK VIO VIO VIO VIO (OR PNK) (OR PNK) VIO VIO VIO VIO VIO VIO VIO VIO VIO GRY GRY GRY PNK PNK WHT GRY BLK WHT PNK BLU BLK BLK RED WHT GRY H-LP MAIN RH FUSE H-LP MAIN LH FUSE EPS-B FUSE VGRS FUSE ST 1 FUSE DRS FUSE DCM FUSE ETCS FUSE STOP FUSE HORN FUSE INJ FUSE S-HORN FUSE IG1 3 FUSE (RIGHT REAR CORNER OF ENGINE COMPT) (LEFT SIDE OF ENGINE COMPT) (LEFT END OF DASH) (LEFT SIDE OF ENGINE COMPT) (LEFT "A" PILLAR) (UNDER FRONT PASSENGER'S SEAT) LATE PRODUCTION EARLY PRODUCTION FROM ENGINE ROOM J/B ASSEMBLY 2 (DIAGRAM 1 OF 5) FROM FUEL PMP FUSE (DIAGRAM 1 OF 5) STARTING/ CHARGING SYSTEM ELECTRONIC POWER STEERING SYSTEM HEADLIGHTS SYSTEM ELECTRONIC POWER STEERING SYSTEM ANTI-THEFT & DOOR LOCKS SYSTEMS HORNS SYSTEM ENGINE CONTROLS SYSTEM NAVIGATION SYSTEM DOOR LOCKS, ANTI-THEFT, EXTERIOR LIGHTS, ENGINE CONTROLS, CRUISE CONTROL & TRANSMISSIONS SYSTEMS FROM IG1 3 RELAY (DIAGRAM 5 OF 5) SEATS SYSTEM ENGINE CONTROLS, TRANSMISSIONS & CRUISE CONTROL SYSTEMS AIR CONDITIONING, SEATS, NAVIGATION, SOUND, DEFOGGER, TRANSMISSIONS, ANTI-LOCK BRAKES & CRUISE CONTROL SYSTEMS POWER TOPS SYSTEM POWER TOPS SYSTEM NAVIGATION SYSTEM NAVIGATION SYSTEM MIRRORS SYSTEM MIRRORS SYSTEM NAVIGATION SYSTEM WIPER/ WASHER SYSTEM WIPER/ WASHER SYSTEM
D F IG BATT G 10A 10A 15A 20A 25A 15A E 15A 20A 5A 5A 25A 5A 20A 10A C B ENGINE ROOM R/B ASSEMBLY 2 J/C 1 (A65) GROUND J/C 1 (A68) ENGINE ROOM J/B ASSEMBLY 2 SEMICONDUCTOR POWER INTEGRATION ECU A/F RELAY H-LP LH-LO RELAY H-LP RH-LO RELAY EFI-MAIN RELAY D11 17 18 F2 G4 G3 F4 E1 B1 1 3 5 2 3 1 2 GRN GRN BLU BLK BLK BLK GRN GRN BLU GRN BLK LT GRN WHT BLK BLU BLU RED WHT/ BLK BLK WHT/ RED RED WHT/ BLK BLK WHT/ GRN GRN IG1 MAIN RELAY AVS FUSE WASHER FUSE RADAR-IG FUSE ENG-IG 1 FUSE WIPER FUSE EPS-IG FUSE ENG-IG 2 FUSE WIRING HARNESS CONDENSER ASSEMBLY 1 H-LP RH-LO FUSE EFI-MAIN FUSE IG2-MAIN FUSE H-LP LH-LO FUSE A/F FUSE IG2 RELAY IG2 FUSE P INJ FUSE (LEFT SIDE OF ENGINE COMPT) (LEFT SIDE OF ENGINE COMPT) (RIGHT REAR OF ENGINE COMPT) (LEFT REAR CORNER OF ENGINE COMPT) (RIGHT REAR CORNER OF ENGINE COMPT) (LEFT SIDE OF ENGINE COMPT) AC AF FROM NOISE FILTER FUSE (DIAGRAM 1 OF 5) FROM IG1- MAIN FUSE (DIAGRAM 1 OF 5) ELECTRONIC SUSPENSION SYSTEM WIPER/ WASHER SYSTEM COOLING FANS SYSTEM ELECTRONIC POWER STEERING SYSTEM CRUISE CONTROL SYSTEM FROM INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 5 OF 5) WIPER/WASHER SYSTEM FROM ENGINE ROOM J/B ASSEMBLY 1 (DIAGRAM 1 OF 5) TO INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 4 OF 5) ENGINE CONTROLS & TRANSMISSIONS SYSTEMS ENGINE CONTROLS & TRANSMISSIONS SYSTEMS FROM INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 5 OF 5) ENGINE CONTROLS SYSTEM
J M L BECU O O N 10A 30A 30A 20A 7.5A 30A 30A 30A 15A 10A 10A 5A 15A 15A 7.5A 20A 5A H 7.5A 7.5A 7.5A 7.5A SS2 SS1 ACCD IG1D AGND G SSW2 SSW1 +B INSTRUMENT PANEL J/B ASSEMBLY MAIN BODY ECU DOME CUT RELAY CERTIFICATION ECU ENGINE SWITCH INSTRUMENT PANEL J/B ASSEMBLY D DR UNLOCK RELAY ALL DR LOCK RELAY FUEL LOCK RELAY L/D DR UNLOCK RELAY 31 C19 A8 A28 A27 A44 A43 C9 A53 D30 A15 A31 A11 A13 A14 A1 D4 D5 A56 A32 B15 D27 A21 A30 A50 A10 A3 F1 O6 9 3 5 6 1 A22 12 A13 O6 18 16 10 C2 BLK WHT BLK YEL BLU LT VIO BLK LT GRN BLK BLK BLU WHT VIO ORG LT BLU BLK GRN BLK GRN LT BLU BLU GRN GRN BLK ORG BLK PNK VIO GRY LT GRN BLU LT GRN BLU GRY ORG WHT STRG LOCK FUSE IGN 1 FUSE HAZ FUSE AM2 FUSE AMP 1 FUSE A/BAG-IG2 FUSE D/L FUSE RADIO FUSE J/B-B FUSE ODS FUSE ECU-B FUSE SMART FUSE AMP 2 FUSE IGN 2 FUSE METER FUSE DOME FUSE DOOR F/R FUSE P/SEAT F/R FUSE J/B-AM FUSE OBD FUSE TI & TE FUSE (LEFT END OF DASH) (LEFT END OF DASH) (NOT USED) (NOT USED) FROM ENGINE ROOM R/B ASSEMBLY 1 (DIAGRAM 1 OF 5) FROM ENGINE ROOM J/B ASSEMBLY 2 (DIAGRAM 3 OF 5) TO ALL DR LOCK RELAY (DIAGRAM 4 OF 5) SUPPLEMENTAL RESTRAINTS SYSTEM SHIFT INTERLOCK SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM NAVIGATION & SOUND SYSTEMS NAVIGATION SYSTEM SHIFT INTERLOCK SYSTEM INTERIOR LIGHTS SYSTEM ELECTRONIC POWER STEERING SYSTEM SOUND & NAVIGATION SYSTEMS INSTRUMENT CLUSTER SYSTEM INSTRUMENT CLUSTER & EXTERIOR LIGHTS SYSTEMS COMPUTER DATA LINES SYSTEM ANTI-THEFT SYSTEM ENGINE CONTROLS SYSTEM CRUISE CONTROL & EXTERIOR LIGHTS SYSTEMS TO INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 5 OF 5) TO INSTRUMENT PANEL J/B ASSEMBLY (DIAGRAM 5 OF 5) FROM ECU-ACC FUSE (DIAGRAM 5 OF 5) FROM ACC RELAY (DIAGRAM 5 OF 5) FROM D/L FUSE (DIAGRAM 4 OF 5) MEMORY & ELECTRONIC POWER STEERING SYSTEMS SEATS SYSTEM MEMORY SYSTEMS WARNING SYSTEMS POWER WINDOWS SYSTEM COMPUTER DATA LINES SYSTEM
R J F D M GND 1 L TRLY 7.5A 15A IG ACC E B N 20A K 15A 7.5A 30A 30A 7.5A 7.5A 5A 7.5A 10A 10A 10A 15A 5A 15A 10A INSTRUMENT PANEL J/B ASSEMBLY MAIN BODY ECU BKUP LP RELAY TRUNK OPN RELAY MAIN BODY ECU 11 A23 A42 A19 A55 C5 D19 14 A12 C17 D29 C21 D28 A39 32 D34 A54 C3 C12 C13 D14 D15 30 B13 B12 D21 C20 D13 3 1 B1 C11 B19 B7 A33 C23 A49 C22 E1 A35 D6 A16 VIO BLK GRN GRN RED VIO GRN LT GRN BLK BLU RED RED WHT BLK BLU YEL ORG GRN RED RED GRN BLK LT BLU GRN BLK BLK BLU BLK WHT/ BLK WHT/ BLK LT GRN VIO PNK BLK WHT/ BLK WHT/ BLK IG1 1 RELAY IG1 2 RELAY IG1 3 RELAY ECU-IG1 1 FUSE S/HTR F/R FUSE IG1 1 FUSE S/HTR F/L FUSE IG1 2 FUSE BKUP LP FUSE WIPER SW-IG FUSE ECU-IG1 2 FUSE TAIL RELAY ECU-ACC FUSE P/OUTLET 1 FUSE TRUNK OPN FUSE DOOR F/L FUSE P/W FUSE A/C FUSE P/SEAT F/L FUSE S/ROOF FUSE P/OUTLET RELAY ACC RELAY PANEL FUSE TAIL FUSE POWER OUTLET SOCKET ASSEMBLY 1 (LEFT END OF DASH) (RIGHT KICK PANEL) (LEFT KICK PANEL) OC OA (NOT USED) 3.5L (NOT USED) (NOT USED) FROM CERTIFICATION ECU (DIAGRAM 4 OF 5) TO ENGINE ROOM J/B ASSEMBLY 2 (DIAGRAM 3 OF 5) TO ENGINE ROOM R/B ASSEMBLY 2 (DIAGRAM 3 OF 5) FROM ENGINE ROOM J/B ASSEMBLY 1 (DIAGRAM 1 OF 5) TO IG1 3 FUSE (DIAGRAM 2 OF 5) ANTI-LOCK BRAKES SYSTEM NAVIGATION SYSTEM SEATS, PASSIVE RESTRAINTS, WARNING & MEMORY SYSTEMS SHIFT INTERLOCK SYSTEM WIPER/ WASHER SYSTEM SEATS SYSTEM HEADLIGHTS & WIPER/ WASHER SYSTEMS TRANSMISSIONS SYSTEM ANTI-LOCK BRAKES & ELECTRONIC POWER STEERING SYSTEMS AIR CONDITIONING SYSTEM AIR CONDITIONING, MEMORY, SEATS, NAVIGATION, ELECTRONIC POWER STEERING & SOUND SYSTEMS COMPUTER DATA LINES, NAVIGATION, CRUISE CONTROL & WARNING SYSTEMS TO TI & TE FUSE (DIAGRAM 4 OF 5) TO L/D DR UNLOCK RELAY (DIAGRAM 4 OF 5) INTERIOR LIGHTS & INSTRUMENT CLUSTER SYSTEMS AIR CONDITIONING & DEFOGGER SYSTEMS MEMORY SYSTEMS POWER WINDOWS, MIRRORS & MEMORY SYSTEMS EXTERIOR LIGHTS SYSTEM INTERIOR LIGHTS TRANSMISSIONS SYSTEM SEATS SYSTEM POWER WINDOWS SYSTEM FROM CERTIFICATION ECU (DIAGRAM 4 OF 5) NAVIGATION & SOUND SYSTEMS POWER TOPS SYSTEM