Lexus IS III (2013-2016) engine room Wiring diagrams

1 2 3 +B SI GND 13 14 CANL CANH 13 26 38 26 49 48 PRE 30 31 COMPUTER MPX+ MPX- DATA LINES SYSTEM A/C AMPLIFIER (BEHIND RIGHT SIDE OF DASH) A/C PRESSURE SENSOR (LEFT SIDE OF RADIATOR) BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLING FAN ECU (BEHIND LEFT RADIATOR COOLING FAN MOTOR) COOLING FAN ECU 2 (BEHIND RIGHT RADIATOR COOLING FAN MOTOR) COOLING FAN MOTOR 1 (LEFT FRONT OF ENGINE COMPT) COOLING FAN MOTOR 2 (RIGHT FRONT OF ENGINE COMPT) ECM (ENGINE CONTROL MODULE) (LEFT FRONT OF ENGINE COMPT) EFI ENGINE COOLANT TEMPERATURE SENSOR (TOP OF ENGINE) ENGINE ROOM FAN 1 FAN 2 J/B 1 FUSE FUSE (RIGHT REAR OF ENGINE COMPT) FAN RELAY 1 FAN RELAY 2 GRN/YEL WIRE HOT AT ALL TIMES HOT W/ LH-IG 1 RELAY ENERGIZED LEFT COWL SIDE J/B LH-IG (LEFT FUSE END OF DASH) JUNCTION CONNECTOR PNK SG-2 WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RFC VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/GRN WIRE

+BM 17 12 13 CCHG 21 13 14 15 TC CANL CANH CCS 24 16 SPD LGND 29 20 23 28 21 22 1 VPA EPA VCPA 56 34 PNK WIRE 6 7 PNK WIRE 8 7 SFTU SFTD BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM ECM (ENGINE CONTROL MODULE) (LEFT FRONT OF ENGINE COMPT) EFI FUSE EFI MAIN RELAY ENGINE ROOM ENGINE ROOM J/B 2 (LEFT SIDE OF ENGINE COMPT) ETCS FUSE R/B 2 (LEFT SIDE OF ENGINE COMPT) GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT W/ LH-IG 1 RELAY ENERGIZED IGN FUSE JUNCTION JUNCTION CONNECTOR LEFT COWL SIDE J/B LH-IG FUSE (LEFT END OF DASH) LT GRN WIRE M- M+ ETA NCA WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (TRANSMISSION ASSEMBLY) PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RELAY ENERGIZED STOP LIGHT SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) STOP SW FUSE THROTTLE BODY ASSEMBLY (TOP OF ENGINE) VCTA VTA VIO WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

1 2 3 4 5 LGND SGND LRDD LRRD IGB BLK WIRE BLK/BLU WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BRN WIRE CIRCUIT COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM CRUISE IND DISTANCE CONTROL ECU (BEHIND LEFT SIDE OF DASH) DOME +B ENGINE ROOM GRN/RED WIRE GRY WIRE HOT AT ALL TIMES IGB INPUT CIRCUIT J/C JUNCTION JUNCTION CONNECTOR LCD (MULTI) LRDD LRRD LT GRN WIRE MICRO COMPUTER MILLIMETER WAVE RADAR SENSOR (BEHIND CENTER OF FRONT GRILLE) MODE MPX MPX-B FUSE R/B 1 (RIGHT REAR OF ENGINE COMPT) ORG/ WIRE PNK WIRE RED WIRE RED/BLK WIRE RELAY ENERGIZED RIGHT COWL SIDE J/B (RIGHT END OF DASH) GAUGE FUSE RIGHT COWL SIDE J/B (RIGHT END OF DASH) SGND SPEEDOMETER STEERING SENSOR (UNDER LEFT SIDE OF DASH) SUPPLY POWER VIO WIRE WHT WIRE WHT/BLK WIRE YAW RATE SENSOR (UNDER CENTER CONSOLE) YEL/GRN WIRE

+BM 21 13 14 15 TC CANL CANH CCS 29 20 23 28 21 22 1 VPA EPA VCPA BLK WIRE BLK/RED WIRE BLK/WHT WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM ECM (ENGINE CONTROL MODULE) (LEFT FRONT OF ENGINE COMPT) EFI FUSE EFI MAIN RELAY ENGINE ROOM ENGINE ROOM J/B 2 (LEFT SIDE OF ENGINE COMPT) ETCS FUSE R/B 2 (LEFT SIDE OF ENGINE COMPT) GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT W/ LH-IG 1 RELAY ENERGIZED HOT W/ RH-IG 1 RELAY ENERGIZED IGN FUSE JUNCTION JUNCTION CONNECTOR LEFT COWL SIDE J/B LH-IG FUSE (LEFT END OF DASH) LT GRN WIRE M- M+ ETA NCA WIRE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (TRANSMISSION ASSEMBLY) PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RELAY ENERGIZED RH-IG FUSE RIGHT COWL SIDE J/B (RIGHT END OF DASH) SFTD SFTU STOP LIGHT SWITCH (TOP OF BRAKE PEDAL ASSEMBLY) STOP SW FUSE THROTTLE BODY ASSEMBLY (TOP OF ENGINE) VCTA VTA VIO WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

BLK WIRE BRN WIRE CIRCUIT COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM CRUISE CONTROL MAIN SWITCH CRUISE CONTROL SWITCH CRUISE IND DOME +B ENGINE ROOM GRN/RED WIRE GRY WIRE HOT AT ALL TIMES INPUT CIRCUIT JUNCTION JUNCTION CONNECTOR LCD (MULTI) LEFT PADDLE SHIFT SWITCH LT GRN WIRE MICRO COMPUTER MPX MPX-B FUSE R/B 1 (RIGHT REAR OF ENGINE COMPT) ON OFF ORG/ WIRE PADDLE SHIFT SWITCH PNK WIRE RED WIRE RED/BLK WIRE RELAY ENERGIZED RIGHT COWL SIDE J/B (RIGHT END OF DASH) GAUGE FUSE RIGHT COWL SIDE J/B (RIGHT END OF DASH) RIGHT PADDLE SHIFT SWITCH SPEEDOMETER SPIRAL CABLE (UNDER STEERING WHEEL) STEERING PAD SWITCH ASSEMBLY SUPPLY POWER TRANSMISSION FLOOR SHIFT ASSEMBLY VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/GRN WIRE

1 3 2 SIG ES MPX 21 39 36 37 40 23 IG GND MPX AUTO BLK WIRE BLU WIRE BLU/ORG WIRE BRN WIRE CIRCUIT INPUT COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM WINDSHIELD WASHER MOTOR, PUMP ASSEMBLY (WASHER ENGINE ROOM ENGINE ROOM R/B 1 (RIGHT REAR OF ENGINE COMPT) FR WIP FUSE FRONT CONTROLLER GAUGE FUSE GRN WIRE GRN/RED WIRE GRY WIRE HEAD HEADLAMP WASHER CIRCUIT HOT AT ALL TIMES HOT IN ON OR START IG+ 12 13 POWER SUPPLY ES J/B 2 (LEFT SIDE OF ENGINE COMPT) LEFT COWL SIDE J/B (LEFT END OF DASH) LEFT MAIN BODY ECU LEVEL WARNING SWITCH LH ECU-IG FUSE LH-IG 2 RELAY LT GRN WIRE MICRO COMPUTER MIST MPX+ MPX- 6 18 MPX-B FUSE OFF ORG/ WIRE OVERHEAD MODULE (CENTER FRONT OF ROOF) PNK WIRE POWER SOURCE CONTROL ECU (BEHIND RIGHT SIDE OF DASH) (UNDER CENTER CONSOLE) RAIN SENSOR (TOP CENTER OF FRONT WINDSHIELD) RED/BLU WIRE RESERVOIR) RH ECU-IG FUSE RH-IG 1 RELAY RIGHT COWL SIDE J/B (RIGHT END OF DASH) S/S +2 S/M SWITCH VIO WIRE WASH RELAY WASHER WASHER FUSE WHT WIRE WHT/BLK WIRE WIG WINDSHIELD WIPER MOTOR ASSEMBLY (BELOW LOWER LEFT SIDE OF WINDSHIELD) WINDSHIELD WIPER SWITCH ASSEMBLY WIPER SWITCH YEL WIRE

ABS 2 FUSE AIR ANTI-LOCK CONDITIONING BRAKES SYSTEM SYSTEM AIR CONDITIONING SYSTEM ALT ALT FUSE ALT-S FUSE ANTI-LOCK BRAKES SYSTEM ANTI-THEFT, DOOR LOCKS SYSTEMS BATTERY BLK WIRE BLU WIRE D/C CUT FUSE MPX-B 2 FUSE DCM DK GRN WIRE DOOR LOCKS SYSTEM ELECTRONIC POWER STEERING SYSTEM ENG-AM FUSE ENG-B FUSE FUSE ENGINE ROOM ENGINE ROOM J/B 1 ENGINE ROOM R/B 1 ENGINE ROOM R/B 2 (LEFT SIDE OF ENGINE COMPT) EPS-B ETCS S-HORN FUSE FUSE FROM ENGINE ROOM J/B 1 (DIAGRAM 1 OF 4) FUEL P/I-AM FUSE GRN WIRE GRY WIRE H-LP CLN FAN FUSE FUSE FUSE HORN FUSE HORNS SYSTEM INSTRUMENT PANEL J/B (LEFT END OF DASH) J/B 2 (LEFT SIDE OF ENGINE COMPT) MIR HTR FUSE NOISE FILTER FUSE STRG HTR FUSE J/B HTR LH-B FUSE FUSE J/B LH-AM FUSE LT GRN WIRE MEMORY SYSTEMS MPX-B 1 FUSE NAVIGATION SYSTEM P/I-B FUSE PNK WIRE PTC ST HTR 1 FUSE FUSE FUSE PTC VGRS EPS ABS 1 PMP HTR 2 FUSE FUSE FUSE FUSE FUSE RED WIRE SEATS DEFOGGER SYSTEM SYSTEM SEMI CONDUCTOR POWER INTEGRATION ECU STARTER ASSEMBLY STARTING/ CHARGING SYSTEM STARTING/ CHARGING SYSTEM AIR CONDITIONING SYSTEM STOP INJ FUSE FUSE TO ENGINE ROOM COOLING R/B 2 FANS (DIAGRAM SYSTEM 2 OF 4) TO ENGINE ROOM J/B 2 (DIAGRAM 1 OF 4) TO ENGINE ROOM J/B 2 (DIAGRAM 2 OF 4) TO ENGINE ROOM R/B 2 (DIAGRAM 2 OF 4) TO INSTRUMENT PANEL J/B (DIAGRAM 3 OF 4) TO INSTRUMENT PANEL J/B (DIAGRAM 4 OF 4) WHT WIRE WIPER/WASHER SYSTEM XA (RIGHT REAR OF ENGINE COMPT)

1 21 2 22 20 39 IG PNK WIRE BLK WIRE BLU WIRE BRN WIRE DOME FUSE R/B 1 (RIGHT REAR OF ENGINE COMPT) ECU-IG LH FUSE ENGINE ROOM GARAGE DOOR OPENER GRN WIRE HOT AT ALL TIMES HOT W/ LH-IG 2 RELAY ENERGIZED INNER REAR VIEW MIRROR ASSEMBLY JUNCTION JUNCTION CONNECTOR LEFT COWL SIDE J/B (LEFT END OF DASH) LEFT OUTER ECI- ECI+ MIRROR CONTROL ECU EC- EC+ (LEFT FRONT DOOR) LEFT OUTER REARVIEW MIRROR ASSEMBLY LT GRN WIRE ORG/ WIRE OVERHEAD MODULE (CENTER FRONT OF ROOF) PNK 6 1 4 5 2 +B IG EC+ EC- 4 3 2 1 WIRE RED WIRE RIGHT COWL SIDE J/B (RIGHT END OF DASH) RIGHT OUTER ECI- ECI+ MIRROR CONTROL ECU EC- EC+ (RIGHT FRONT DOOR) RIGHT OUTER REARVIEW MIRROR ASSEMBLY VIO WIRE W/ GARAGE DOOR OPENER W/O GARAGE DOOR OPENER WHT WIRE WHT/BLK WIRE

1 2 3 4 5 6 7 USB USBG VOT+ USBV VOT- VOR- VOR+ BLK WIRE BLU WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DCM TELEMATICS TRANSCEIVER (RIGHT SIDE OF DASH) ENGINE ROOM FUSE GPS ANTENNA GRN WIRE GRY WIRE HOT AT ALL TIMES HOT W/ ACC RELAY ENERGIZED IGN FUSE ILL+ GSW SIL SIG- INSTRUMENT CLUSTER SYSTEM LT BLU WIRE LT GRN WIRE MACC MCO- MIC - MICROPHONE MIN MULTI-MEDIA MODULE RECEIVER ASSEMBLY MUTE MCO+ MCO- NCA WIRE ORG/ WIRE OVERHEAD MODULE (CENTER FRONT OF ROOF) PNK WIRE RADIO RECEIVER ASSEMBLY RED WIRE RELAY ENERGIZED RIGHT COWL SIDE J/B (RIGHT END OF DASH) RIGHT FRONT SPEAKER ASSEMBLY 1 RIGHT FRONT SPEAKER ASSEMBLY 3 SGND SHIELD SHIELD SGND MCVD MCI+ MCI- SHIELD SHIELD 11 2 3 10 8 SLED SLED SPDP SOS SWITCH SPO+ SPO- TEL FUSE R/B 2 (LEFT SIDE OF ENGINE COMPT) TELEPHONE ANTENNA TMUT TWR+ USB USBG USBV VIO WIRE VOR- VOT+ WHT WIRE WHT/BLK WIRE