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

4 3 IG BLK WIRE BLU WIRE ECU-IG 2 FUSE GRN WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) STRG HTR FUSE LT BLU WIRE PNK IN WIRE PNK WIRE R/B 3 (BEHIND LEFT END OF DASH) RELAY ENERGIZED SPIRAL CABLE SUB-ASSEMBLY (STEERING COLUMN) STEERING HEATER STEERING WHEEL HEATER CONTROL ASSEMBLY STRG HTR RELAY VIO WIRE WHT WIRE WHT/BLK WIRE

2 38 37 18 4 PNK WIRE 31 29 32 ALTB BLK WIRE BLU WIRE BRN WIRE BUZZER CLS CLOSE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM DOOR 1 FUSE DOWN DOWN ECU- IG 1 FUSE ECU-ACC FUSE ECU-B FUSE ECU-IG 2 FUSE ENGINE ROOM R/B (LEFT SIDE GRN WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LEFT "B" PILLAR) LT BLU WIRE M- M+ MAIN BODY ECU MAP LIGHT ASSEMBLY MASTER IND MET FUSE OF ENGINE COMPT) OPN OPN DWN CLS UP ORG/ WIRE PNK CANH WIRE PNK LIN IG WIRE PNK WIRE RED WIRE S/ROOF FUSE SLIDING ROOF CONTROL ECU (CENTER OF ROOF) SLIDING ROOF CONTROL SWITCH UP UP VIO WIRE WHT WIRE WHT/BLK WIRE

+ECU 31 29 32 30 ALTB 9 10 3 CANP CANN BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CONTROL CIRCUIT DOOR 1 FUSE DOOR R/L FUSE DOOR R/R FUSE DRIVER SIDE AUTO SWITCH DRIVER SIDE DOWN SWITCH DRIVER SIDE UP SWITCH DRIVER'S DOOR FRONT PASSENGER SIDE CONTROL SWITCH FUSE GRN WIRE HOT AT ALL TIMES HOT AT ALL TIMES ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) ECU-B FUSE HOT AT ALL TIMES INSTRUMENT PANEL J/B D FR DOOR FUSE (BEHIND LEFT END OF DASH) HOT IN ACC OR ON HOT IN ON OR START IG BECU LIN 2 FLCY INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LED LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (LEFT "B" PILLAR) LEFT REAR SIDE CONTROL SWITCH MAIN BODY ECU MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY P FR DOOR FUSE PNK WIRE POWER WINDOW INDICATOR RED WIRE RIGHT REAR SIDE CONTROL SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WINDOW LOCK SWITCH WINDOW LOCK SWITCH INDICATOR YEL WIRE

BACKUP BATTERY (MAYDAY BATTERY) BBO- BLK WIRE BLU WIRE BRN WIRE CB+ CGND COMPUTER DATA LINES SYSTEM PNK WIRE CV+ GRN WIRE GRY WIRE GVIF HOT IN ON OR START ECU-IG 2 FUSE INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LT GRN WIRE MACC MAP LIGHT ASSEMBLY MCO- MICROPHONE, MICROPHONE AMPLIFIER NCA WIRE ORG/ WIRE PARKING ASSIST ECU (W/ BACK GUIDE MONITOR) (BEHIND RIGHT SIDE OF DASH) PNK WIRE REAR TELEVISION CAMERA ASSEMBLY RED WIRE SOS SWITCH VIO WIRE W/ BACK GUIDE MONITOR W/ LEXUS ENFORM W/O BACK GUIDE MONITOR W/O LEXUS ENFORM WHT WIRE WHT/BLK WIRE

BACKUP BATTERY (MAYDAY BATTERY) BBO- BLK WIRE BLU WIRE BRN WIRE GRN WIRE GRY WIRE LEFT FRONT SPEAKER ASSEMBLY 2 LEFT FRONT SPEAKER ASSEMBLY 3 LT BLU WIRE LT GRN WIRE MAP LIGHT ASSEMBLY MICROPHONE, MICROPHONE AMPLIFIER NCA WIRE PNK WIRE RED WIRE RIGHT FRONT SPEAKER ASSEMBLY 2 RIGHT FRONT SPEAKER ASSEMBLY 3 SOS SWITCH VIO WIRE W/ SAFETY CONNECT W/O SAFETY CONNECT WHT WIRE WHT/BLK WIRE YEL WIRE

BACKUP BATTERY (MAYDAY BATTERY) BBO- BLK WIRE BLU WIRE BRN WIRE GRN WIRE GRY WIRE GRY/BLK WIRE LEFT STEERING PAD SWITCH MAP LIGHT ASSEMBLY MICROPHONE, MICROPHONE AMPLIFIER MODE NCA WIRE OFF HOOK ON HOOK PNK WIRE RED WIRE RIGHT STEERING PAD SWITCH SEEK SOS SWITCH SPIRAL CABLE SUB-ASSEMBLY (STEERING COLUMN) STEERING PAD SWITCH ASSEMBLY VIO WIRE VOICE VOLUME- W/ SAFETY CONNECT W/O SAFETY CONNECT WHT WIRE WHT/BLK WIRE

12 11 LBE- LBE+ 13 12 FSR- FSR+ 13 14 CANL CANH 22 13 CANL CANH 32 31 PNK CANH CANL COMPUTER DATA LINES SYSTEM WIRE 5 9 8 4 PNK WIRE AIR BAG SENSOR ASSEMBLY (UNDER LOWER CENTER CONSOLE) BGND BSW FSR+ FSR- BLK WIRE BLU WIRE BRAKE LEVER) BRN WIRE BUCKLE SWITCH LEFT FRONT SEAT INNER BELT ASSEMBLY (UNDER DRIVER'S SEAT) BUZZER COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECU-B FUSE ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) GRN WIRE HOT AT ALL TIMES HOT IN ON OR START IGN FUSE INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LEFT FRONT DOOR COURTESY LIGHT SWITCH LT GRN WIRE MAIN BODY ECU MET FUSE OCCUPANT DETECTION ECU (UNDER FRONT PASSENGER'S SEAT) PARKING BRAKE SWITCH (BASE OF PARKING PNK WIRE RED WIRE SEAT BELT IND VIO WIRE WHT WIRE WHT/BLK WIRE

4 5 6 7 8 9 10 11 12 FSR- BGND BLK WIRE BLU WIRE BRN WIRE CAN L CAN H EP CAN P CAN-N COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM DIA ECU-B FUSE ECU-IG 2 FUSE OF DASH) END OF DASH) ENGINE ROOM R/B (LEFT SIDE OF ENGINE COMPT) FRONT IN WEIGHT DETECTOR SENSOR SUB ASSEMBLY FRONT OUT WEIGHT DETECTOR SENSOR SUB ASSEMBLY FSR+ BSW GRN WIRE GRY WIRE GSW HOT AT ALL TIMES HOT IN ON OR START IGN FUSE INSTRUMENT PANEL J/B (BEHIND LEFT INSTRUMENT PANEL J/B (BEHIND LEFT END LT BLU WIRE LT GRN WIRE MAIN BODY ECU MET FUSE OCCUPANT DETECTION ECU (UNDER FRONT ORG/ WIRE PASSENGER'S SEAT) PNK WIRE REAR IN WEIGHT DETECTOR SENSOR SUB-ASSEMBLY REAR OUT WEIGHT DETECTOR SENSOR SUB-ASSEMBLY RED WIRE SRS IND 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

BACK DOOR LOCK ASSEMBLY (CENTER REAR OF LUGGAGE COMPT) BACK DOOR OPENER SWITCH ASSEMBLY BK/DR RELAY BLK WIRE BLU WIRE BRN WIRE CERTIFICATION ECU (BEHIND RIGHT SIDE OF DASH) COMPUTER DATA LINES SYSTEM DOOR 1 FUSE FUEL LID LOCK MOTOR (LEFT REAR OF VEHICLE NEAR FUEL FILLER) FUEL LID OPENER SWITCH FUEL OPEN FUSE FUEL OPN RELAY GRN WIRE GRY WIRE HOT AT ALL TIMES IIL (-) INSTRUMENT PANEL J/B (BEHIND LEFT END OF DASH) LEFT "C" PILLAR) LOCK LT BLU WIRE LT GRN WIRE MAIN BODY ECU RED WIRE TR+ BCTY WHT WIRE WHT/BLK WIRE YEL WIRE