Lexus CT I (2010-2014) (behind left end of dash) Wiring diagrams

+ECU 10 18 9 PNK WIRE 3 2 1 12 13 14 PNK PNK SHB SHRR SHG WIRE 5 15 PRST SPDR RHT LHT SHRL 7 8 SIL LVL 8 3 4 LHIG LH T LH E 8 3 4 RHIG RH T RH E BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY ECU- IG 1 FUSE ENGINE ROOM J/B ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FUSE GAUGE FUSE GND 2 GRN WIRE HDLP HEAD HEADLAMP DIMMER SWITCH ASSEMBLY HEADLIGHT HEADLIGHT BEAM LEVEL CONTROL IND HEADLIGHT LEVELING ECU (BEHIND RIGHT END OF DASH) HL 4 HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IG 1 INIT WNG INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) INTEGRATION RELAY LEFT HEADLIGHT ASSEMBLY LEVELING LIGHT CONTROL SWITCH AUTO LT BLU WIRE LT GRN WIRE MAIN BODY ECU MET FUSE MOTOR P/I 2 FUSE PNK WIRE RED WIRE RH LH RH+ LH+ SBR RIGHT HEADLIGHT ASSEMBLY RIGHT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY (LEFT SIDE OF REAR BUMPER) SGR TAIL OFF VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

+S +1 +S WLVL CALH CANL +SM +SSW IG -1 +2 2 4 +B +2 BLK WIRE BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECU-IG 2 FUSE ES AUTO SIG FRONT WASHER SWITCH FRONT WIPER AUTO SWITCH GRN WIRE HIGH LOW +1 AUTO OFF MIST HIGH LOW AUTO HIGH LOW AUTO +S OFF MIST INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LEVEL WARNING SWITCH ASSEMBLY (HEADLIGHT ASSEMBLY) LT GRN WIRE OFF MIST ORG/ WIRE PNK WIRE RAIN SENSOR (REAR VIEW MIRROR ASSEMBLY) RED WIRE SIG VIO WIRE WASHER FUSE WHT WIRE WHT/BLK WIRE WIG WINDSHIELD WASHER MOTOR, PUMP ASSEMBLY (IN WASHER FLUID RESERVOIR) WINDSHIELD WIPER MOTOR ASSEMBLY (LEFT REAR OF ENGINE COMPT) WINDSHIELD WIPER RELAY ASSEMBLY (FRONT OF FLOOR CONSOLE) WINDSHIELD WIPER SWITCH ASSEMBLY WIP FUSE YEL WIRE

BRAKE BOOSTER PUMP ASSEMBLY BRN WIRE COMPRESSOR ASSEMBLY W/ MOTOR COOLING FAN 1 MOTOR ENG W/P ENGINE FAN 2 IGCT RELAY RELAY RELAY FRONT WIPER DEICER (WINDSHIELD GLASS) FUEL SENDER GAUGE ASSEMBLY HALOGEN TYPE HEADLIGHT LEVELING ECU ASSEMBLY HOOD COURTESY SWITCH INVERTER ASSEMBLY W/ CONVERTER LEFT FRONT FOG LIGHT ASSEMBLY LEFT FRONT SPEED SENSOR SHIELD LEFT HEADLIGHT ASSEMBLY LEFT REAR SPEED SENSOR SHIELD NCA WIRE P CON MTR RELAY RELAY RIGHT FRONT FOG LIGHT ASSEMBLY RIGHT FRONT SPEED SENSOR SHIELD RIGHT REAR SPEED SENSOR SHIELD SKID CONTROL ECU W/ ACTUATOR ASSEMBLY TRANSMISSION CONTROL ECU ASSEMBLY WATER PUMP ASSEMBLY W/ MOTOR WHT WIRE WHT/BLK WIRE WINDSHIELD WIPER MOTOR ASSEMBLY

11 10 9 SWIL CANL CANH 17 18 PNK WIRE ALTB BECU IG TRLY BLK WIRE BLU WIRE BRN WIRE CERTIFICATION ECU (BEHIND RIGHT SIDE OF DASH) COMBINATION METER ASSEMBLY COMBINATION SWITCH ASSEMBLY COMPUTER DATA LINES SYSTEM DC/DC FUSE DOOR 1 FUSE ECU-ACC FUSE ECU-B FUSE ECU-IG 2 FUSE ENGINE ROOM J/B (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START ILL+ TC IMAN ECOD INSTRUMENT PANEL J/B LIGHT CONTROL RHEOSTAT LT BLU WIRE MAIN BODY ECU ORG/ WIRE PANEL FUSE MET FUSE PNK WIRE POWER SWITCH RED WIRE REV SWIL TAIL FUSE TAIL RELAY VIO WIRE WHT WIRE WHT/BLK WIRE

22 23 15 16 PCON PPOS 22 28 PCON PPOS 6 5 23 MREL BATT HRNH HRNL HLPR HLPL BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DOOR 2 FUSE ECU-B FUSE ENGINE ROOM J/B (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE HEADLIGHTS SYSTEM HNSW HORNS SYSTEM HOT AT ALL TIMES IGCT 2 FUSE IGCT FUSE IGCT RELAY IMI IMO INDS INDW INTEGRATION RELAY LT BLU WIRE LT GRN WIRE ORG/ WIRE P/I 2 FUSE PNK WIRE POWER MANAGEMENT CONTROL ECU (BEHIND RIGHT SIDE OF DASH) RED WIRE SHIFT LEVER POSITION SENSOR (BEHIND CENTER OF DASH) SHIFT LEVER POSITION SENSOR 2 (UNDER CENTER CONSOLE) TRANSMISSION CONTROL ECU TRANSMISSION SHIFT MAIN SWITCH (LEFT SIDE OF CENTER CONSOLE) VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

ACTG BK/DR RELAY BLK WIRE BLU WIRE BRN WIRE BUZZER CAN MASTER IND I/F COMBINATION METER ASSEMBLY COMBINATION SWITCH ASSEMBLY COMPUTER DATA LINES SYSTEM D/L SOURCE RELAY ECU- ECU- IG 1 FUSE FUSE FUSE LEFT END OF DASH) EFII EFIO GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (BEHIND LEFT STOP FUSE END OF DASH) HOT IN HOT AT ON OR ALL TIMES INSTRUMENT PANEL DOOR J/B (BEHIND HOT IN ON OR HOT IN ON OR START ID CODE BOX (BEHIND LEFT SIDE OF DASH) LT BLU WIRE MAIN BODY ECU MET FUSE GAUGE FUSE MULTI-INFORMATION DISPLAY PNK WIRE RED WIRE SECURITY IND TO D/L RELAY (DIAGRAM 3 OF 5) VIO WIRE WHT/BLK WIRE YEL WIRE

+B PGND 1 2 3 4 5 6 7 8 9 10 MOR- MOR+ MOL+ MOL- 1 2 3 4 5 6 7 8 CAN H CAN L 38 16 17 39 5 LRRD LRDD 5 4 3 2 1 IGB LRRD LRDD SGND 8 4 3 BLK WIRE BLU WIRE BRN WIRE CANH CANL PNK 32 31 WIRE COMBINATION METER COMPUTER DATA LINES SYSTEM CONSOLE) (BEHIND LEFT CENTER OF DASH) DRIVING SUPPORT ECU ASSEMBLY (BEHIND RIGHT SIDE OF DASH) ECU-IG 2 FUSE GRN WIRE HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) MET FUSE LEFT FRONT SEAT OUTER BELT ASSEMBLY LT BLU WIRE LT GRN WIRE MILLIMETER WAVE RADAR SENSOR ASSEMBLY (BEHIND CENTER OF FRONT GRILLE) ORG/ WIRE PBSW PCS IND PRE-COLLISION SYSTEM CANCEL SWITCH ASSEMBLY (LEFT SIDE OF DASH) PSB FUSE RED WIRE RIGHT FRONT SEAT OUTER BELT ASSEMBLY SEAT BELT CONTROL ECU (BEHIND RIGHT SIDE OF DASH) SKID CONTROL ECU W/ ACTUATOR ASSEMBLY VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 CLSW SPD TC TACH IND 1 4 2 5 RDA GND RSSI BLU WIRE BRN WIRE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ENGINE ROOM R/B GND SIL PNK WIRE GRN WIRE HOT AT ALL TIMES ECU-B FUSE HOT IN ON OR START HOT IN ON OR START ECU-IG 2 FUSE INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LT BLU WIRE LT GRN WIRE MET FUSE ORG/ WIRE RED WIRE SWITCH (LEFT SIDE OF DASH) TIRE PRESSURE IND TIRE PRESSURE WARNING ANTENNA, RECEIVER (LEFT "C" PILLAR) TIRE PRESSURE WARNING ECU (BEHIND RIGHT SIDE OF DASH) TIRE PRESSURE WARNING RESET TIRE) VIO WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 MWA MVA BATT +B RA BLK WIRE BLU WIRE BMA BRN WIRE COMPUTER DATA LINES SYSTEM DASH) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) P CON MAIN FUSE IND INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LT BLU WIRE LT GRN WIRE MUA MVA MWA P CON MTR FUSE PCON MTR RELAY PCON PPOS LIN PNK WIRE RED WIRE RVC STOP FUSE STP+ TRANSMISSION CONTROL ECU (BEHIND RIGHT SIDE OF DASH) TRANSMISSION SHIFT MAIN SWITCH VC RB VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

+BWP 12 11 9 10 8 7 13 1 2 3 4 6 5 GRFG GRF GCSG GCS GSNG GSN PNK WIRE 22 28 PCON PPOS 6 23 18 19 26 34 35 27 MREL STP ACCELERATOR PEDAL SENSOR (ON ACCELERATOR PEDAL ASSEMBLY) AMD BLK WIRE BLU WIRE BRN WIRE COMBINATION SWITCH ASSEMBLY DC/DC FUSE DC/DC-S FUSE ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) EV MODE EVSW FUSE GCS GCSG GRF GRFG GRN WIRE GRY WIRE GSN GSNG HOT AT ALL TIMES IGCT 2 FUSE IGCT 3 FUSE IGCT FUSE IGCT RELAY INVERTER ASSEMBLY W/ CONVERTER LT GRN WIRE MCS MOTOR GENERATOR 1 (LEFT FRONT OF ENGINE COMPT) MOTOR GENERATOR 2 (LEFT FRONT OF ENGINE COMPT) MRF MRF MRFG MSN MSNG MCS MSCG MRFG MSCG MSN MSNG ORG/ WIRE PCU FUSE PNK WIRE POWER MANAGEMENT CONTROL ECU (BEHIND RIGHT SIDE OF DASH) RED WIRE VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE