Lexus RX III (2008-2012) ecu-b 1 fuse Wiring diagrams

1 5 8 9 PNK WIRE 23 24 PNK CANH CANL WIRE 26 20 25 PNK IG WIRE AFS FUSE (ON LEFT SIDE OF ENGINE COMPT) AUTO TAIL BLK WIRE BLU WIRE BRN WIRE CANADA USA COMBINATION METER ASSEMBLY COMPUTER DATA INIT LINES SYSTEM COMPUTER DATA LINES SYSTEM D/L ALTB FUSE ECU- IG 1 FUSE ECU-ACC FUSE ECU-B 1 FUSE ECU-IG 1 3 FUSE ENGINE ROOM R/B ASSEMBLY FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HEAD HEAD CANL CANH COMPUTER DATA LINES SYSTEM HEADLIGHT DIMMER SWITCH ASSEMBLY HEADLIGHT SWIVEL ECU ASSEMBLY (LEFT END W/ DISPLAY W/O DISPLAY OF DASH) HID TYPE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START INNER REAR VIEW MIRROR ASSEMBLY INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT HEADLIGHT ASSEMBLY LH E LH- RH- SML LH+ LHM+ LIGHT CONTROL SWITCH LIN LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) OFF DRL OFF ORG/ WIRE PNK WIRE RED WIRE RH E RHM + RIGHT HEADLIGHT ASSEMBLY RIGHT REAR HEIGHT CONTROL SENSOR SUB-ASSEMBLY (AT RIGHT REAR SUSPENSION) SHB SHFL SBR SHRL SHG SHRR SMBL SMBR SMGL SMGL SMGR SMGR SML SMR SMR RH+ CANH CANL IGS IG SUSPENSION CONTROL ECU (RIGHT SIDE OF DASH) VIO WIRE W/ AIR SUSPENSION W/O AIR SUSPENSION WHT WIRE WHT/BLK WIRE YEL WIRE

ABS 1 FUSE ABS 2 FUSE BLK WIRE BLU WIRE BM CANH BRAKE PEDAL LOAD SENSING SWITCH (NEAR BRAKE PEDAL ASSEMBLY) BRN WIRE COMPUTER DATA (RIGHT FRONT LINES SYSTEM ENGINE COMPT) COMPUTER DATA LINES SYSTEM CSW STPO ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) FSW+ FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LT GRN WIRE ORG/ WIRE OUT PARKING BRAKE SWITCH ASSEMBLY (ON PARKING BRAKE ASSEMBLY) PNK RL- RL+ FR- FR+ WIRE PNK WIRE RED WIRE RELAY ENERGIZED RR- RR+ FL- FL+ SKID CONTROL BUZZER ASSEMBLY (LEFT SIDE OF DASH) SKID CONTROL ECU W/ ACTUATOR ASSEMBLY (RIGHT REAR OF ENGINE COMPT) STOP FUSE STOP LIGHT CONTROL RELAY ASSEMBLY (LEFT END OF DASH) STOP LIGHT SWITCH ASSEMBLY (ON BRAKE PEDAL BRACKET) VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

AGND ANTENNA COIL BLK WIRE BLU WIRE BRN WIRE BTH+ BTH- CODE COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECU-B 1 FUSE ELECTRONIC POWER STEERING SYSTEM ENGINE CONTROLS SYSTEM ENGINE CONTROLS SYSTEM COMPUTER DATA LINES SYSTEM ENGINE CONTROLS SYSTEM SUPPLEMENTAL RESTRAINTS SYSTEM ENGINE CONTROLS SYSTEM ENGINE ROOM J/B ASSEMBLY (LEFT SIDE OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES IMMOBI FUSE IMO IMI CCS PNK WIRE INDS INDS INDW INDW LT BLU WIRE LT GRN WIRE NCA WIRE ORG/ WIRE PNK CANH CANL WIRE PNK WIRE POWER DISTRIBUTION SYSTEM POWER MANAGEMENT CONTROL ECU (LEFT SIDE OF DASH) POWER SWITCH PSOK RED WIRE S-HORN FUSE S-HORN RELAY SECURITY HORN ASSEMBLY (LEFT FRONT OF ENGINE COMPT) SFTD SFTU SHIFT INTERLOCK SYSTEM SL/R SLP SMRG SMRP SMRB SPDI SWIL THB ABFS ETHB TRANSMISSIONS SYSTEM TXCT VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

14 13 TRLY FFGO 15 25 HRLY DRL 2 4 11 FLCY FRCY 6 5 3 2 1 CLTB CLTS CLTE 8 5 30 28 29 27 22 21 20 HF HU TAIL 9 10 8 21 CANP CANN RLEW LLEW COMPUTER DATA LINES SYSTEM AIR CONDITIONING TSR TSL SYSTEM AUTO TAIL OFF AUTOMATIC LIGHT CONTROL SENSOR (IF EQUIPPED) (TOP RIGHT SIDE OF DASH) BLK WIRE BLU WIRE BRN WIRE CANADA USA D/L ALTB FUSE DIMMER SWITCH ECU-ACC FUSE ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FOG LIGHT SWITCH FR FOG FUSE FR FOG RELAY FUSE GAUGE 2 FUSE GRN WIRE GRY WIRE HEAD HEAD FFOG CLTE CLTS CLTB PNK WIRE HEADLAMP DIMMER SWITCH ASSEMBLY HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LCTY INTERIOR LIGHTS 6 19 SYSTEM RCTY BCTY LEFT FOG LIGHT ASSEMBLY LIGHT CONTROL SWITCH LT BLU WIRE LT GRN WIRE MAIN BODY ECU (BEHIND LEFT SIDE OF DASH) ORG/ WIRE PARKING BRAKE SWITCH PD FUSE PNK WIRE RED WIRE RIGHT FOG LIGHT ASSEMBLY TAIL AUTO HEAD OFF DRL OFF DRL OFF TAIL FUSE TAIL RELAY VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

"B" PILLAR) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 IG 6 5 20 CANP CANN FUL COMPUTER DATA LINES SYSTEM 8 7 CTY BACK DOOR LOCK ASSEMBLY BACK DOOR LOCK ASSEMBLY (W/O POWER BACK DOOR) (LOWER CENTER OF BACK DOOR) BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM ECU-ACC FUSE ECU-B 1 FUSE ENGINE HOOD COURTESY SWITCH (CENTER FRONT OF ENGINE COMPT) ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) ES TX- GAUGE 1 FUSE GRN WIRE GRY WIRE HDD PNK WIRE HDU HOT AT ALL TIMES HOT IN ON OR START HUD ILD ILU ILU ILD HUDO HUDU HUDD INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) MAIN BODY ECU LCTY LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT LEFT LEFT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT LEFT REAR "C" PILLAR) LT BLU WIRE LT GRN WIRE METER MIRROR SUB-ASSEMBLY (LEFT SIDE OF DASH) ORG/ WIRE PARKING BRAKE SWITCH ASSEMBLY (LEFT END OF DASH) PNK WIRE POWER BACK DOOR UNIT ASSEMBLY (IF EQUIPPED) (LEFT REAR OF ROOF) RCTY RED WIRE RIGHT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT RIGHT "B" PILLAR) RIGHT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT RIGHT REAR "C" PILLAR) SATELLITE SWITCH SET VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

+ECU 30 13 BECU CANL 31 32 29 14 ALTB IG ACAN BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CONSOLE BOX ILLUMINATION LIGHT ASSEMBLY D/L ALT B FUSE DC/DC FUSE DISTANCE CONTROL DOOR CONTROL SWITCH ASSEMBLY ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) ENTER FRONT WIPER DEICER SWITCH FUSE GAUGE 2 FUSE GLOVE BOX LIGHT ASSEMBLY GRN WIRE GRY WIRE HAZARD WARNING SIGNAL SWITCH ASSEMBLY HEAD TAIL AUTO HEATER CONTROL PANEL (RADIO RECEIVER ASSEMBLY) ADIM HOOK HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START ILL ILL ILL- REMOTE OPERATION SWITCH LEFT STEERING PAD SWITCH LIGHT CONTROL SWITCH LT BLU WIRE LT GRN WIRE MAIN BODY ECU INSTRUMENT PANEL J/B ASSEMBLY (LEFT SIDE OF DASH) MENU MODE MONITOR MULTI INFORMATION DISPLAY ASSEMBLY MULTI- ILL DISPLAY ASSEMBLY NAVIGATION RECEIVER ASSEMBLY (W/ NAVIGATION) OFF (CANADA) DRL OFF (USA) HEADLIGHT DIMMER SWITCH ASSEMBLY PANEL FUSE PNK ADIM WIRE PNK WIRE RED WIRE SEEK SPIRAL CABLE SUB-ASSEMBLY (IN STEERING COLUMN) STEERING PAD SWITCH ASSEMBLY SWG TAIL TAIL RELAY VIO WIRE VOICE VOLUME RIGHT STEERING PAD SWITCH W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/BLK WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 LMVR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 RMVR 1 2 3 4 5 6 7 8 9 MM 10 11 12 13 14 ECI- BDR BDR CANH CANP ECI+ PNK WIRE BLK WIRE BLK/GRN WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BRN WIRE CANN CANP CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES SYSTEM COMPUTER DATA LINES SYSTEM MIRRORS SYSTEM EC+ ECI+ ECI+ MSWE BDR ECU-B 1 FUSE ECU-B 2 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) F/L DOOR FUSE F/R DOOR FUSE FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT OUTER MIRROR CONTROL ECU ASSEMBLY (IN LEFT FRONT DOOR) LEFT OUTER REAR VIEW MIRROR ASSEMBLY (IN LEFT FRONT DOOR) LMHR LM+R MR- HTR- HSSR LT BLU WIRE LT GRN WIRE MAIN BODY ECU MIRROR ADJUST SWITCH MIRROR AUTO RETRACT SWITCH MIRROR RETRACT SWITCH MIRROR SELECT SWITCH MIRRORS SYSTEM MR+ HTR+ LVC VSSR EC+ MR+ HTR+ RVC VSSR EC+ MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY ORG/ WIRE PNK WIRE RED WIRE RED/WHT WIRE RELAY ENERGIZED RIGHT OUTER MIRROR CONTROL ECU ASSEMBLY (IN RIGHT FRONT DOOR) RIGHT OUTER REAR VIEW MIRROR ASSEMBLY (IN RIGHT FRONT DOOR) RMHR RM+R MR- HTR- HSSR SEAT MEMORY SWITCH SET- SIG CPUB GND CANN CANP SIG CPUB PNK WIRE VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

2 5 4 1 RSSI DATA +5 GND 5 15 16 RCO RDA RSSI 6 9 8 4 3 2 1 13 7 CPUB CANP CANN 7 8 4 CANN CANP PBCL 9 10 CANH CANL BLK WIRE BLU WIRE BRN WIRE CANN CERTIFICATION ECU ASSEMBLY (RIGHT SIDE OF DASH) COMPUTER DATA LINES COMPUTER DATA LINES SYSTEM DOOR CONTROL RECEIVER (RIGHT "C" PILLAR) ECU ASSEMBLY (IN LEFT FRONT DOOR) ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FLCY CANP CANN FUSE GND TIM- GRN WIRE GRY WIRE HEADLAMP DIMMER SWITCH ASSEMBLY HOT AT ALL TIMES INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LEFT FRONT DOOR COURTESY LIGHT SWITCH ASSEMBLY (AT LEFT "B" PILLAR) LEFT FRONT POSITION CONTROL ECU, SWITCH ASSEMBLY LEFT FRONT SEAT INNER BELT ASSEMBLY (UNDER DRIVER'S SEAT) LEFT OUTER MIRROR CONTROL LT BLU WIRE LT GRN WIRE MAIN BODY ECU MM MSWE GND MSW MULTIPLEX TILT, TELESCOPIC ECU (AT BASE OF STEERING COLUMN) ORG/ WIRE PNK WIRE POWER TILT MOTOR (ON STEERING COLUMN) RED WIRE RELAY ENERGIZED SEAT MEMORY SWITCH SET- SYSTEM TELESCO SHORT TELESCOPIC MOTOR TELESCOPIC SENSOR TEM TES TI, TE FUSE TILT DOWN TILT UP TELESCO STRETCH TILT, TELESCOPIC SWITCH TIM TIS VCE VCI VIO WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

BLK WIRE BLU WIRE BRN WIRE CANN COMPUTER DATA LINES SYSTEM ECU-B 1 FUSE ENGINE ROOM R/B ASSEMBLY (ON LEFT SIDE OF ENGINE COMPT) FUSE GRN WIRE HEADLIGHT DIMMER SWITCH ASSEMBLY HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B (LEFT SIDE OF DASH) LT BLU WIRE LT GRN WIRE MSW MULTIPLEX TILT, TELESCOPIC ECU (AT BASE OF STEERING COLUMN) ORG/ WIRE PNK WIRE POWER TILT MOTOR (ON STEERING COLUMN) RED WIRE TELESCO SHORT TELESCO STRETCH TELESCOPIC MOTOR TELESCOPIC SENSOR TEM+ TEM- TI, TE FUSE TILT DOWN TILT UP TILT, TELESCOPIC STRETCH TIM TIS VCE TES VCI WHT WIRE WHT/BLK WIRE YEL WIRE

A/F FUSE A/F RELAY BKUP LP FUSE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE CANISTER PRESSURE SENSOR CANISTER PUMP MODULE (CENTER REAR OF VEHICLE) COMBINATION METER ASSEMBLY COMPUTER DATA LINES SYSTEM ECU-B 1 FUSE ENGINE ROOM J/B ASSEMBLY (LEFT FRONT FENDER APRON) ENGINE ROOM R/B ASSEMBLY (LEFT FRONT FENDER APRON) EXCD FUSE GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B ASSEMBLY (LEFT SIDE OF DASH) LEAK DETECTION PUMP LT BLU WIRE LT GRN WIRE ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON RIGHT SIDE OF TRANSMISSION) PNK WIRE RED WIRE STOP FUSE STOP LIGHT SWITCH ASSEMBLY (ON BRAKE PEDAL ASSEMBLY) VENT VALVE VIO WIRE VOLTAGE INVERTER ASSEMBLY WHT WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE