Lexus LS III facelift (2003-2006) gateway ecu (behind left end of dash) Wiring diagrams

1 2 4 SHB SHFL SGF 2 3 1 SHRL SHB SHG 22 23 21 24 19 SHFL 3 1 7 8 2 BAT 3 2 1 SHB SHRL SHG 3 2 1 SHG SHRR SHB ABS IG FUSE AFS OFF IND AFS OFF SWITCH BLK WIRE BLK/RED WIRE BLU (OR VIO/GRN) WIRE BLU WIRE BLU/YEL WIRE BRN WIRE COMBINATION METER DOME FUSE DRIVER SIDE J/B (AT LEFT KICK PANEL) FUSE GATEWAY ECU (BEHIND LEFT END OF DASH) GAUGE FUSE GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON OR START IG (AT LEFT SIDE OF DASH) IH (AT RIGHT SIDE OF SHIFT LEVER) II (AT RIGHT SIDE OF SHIFT LEVER) IK (AT RIGHT SIDE OF DASH) J/C 10 (BEHIND UPPER CENTER OF DASH) J/C 12, 13 (BEHIND UPPER CENTER OF DASH) J/C 16, 17 (BEHIND UPPER CENTER OF DASH) J/C 17 (BEHIND UPPER CENTER OF DASH) LEFT REAR HEIGHT CONTROL SENSOR (LEFT REAR OF LUGGAGE COMPT) LT GRN WIRE LT GRN/BLK (OR VIO/YEL) WIRE LT GRN/BLK WIRE LT GRN/RED (OR BLK) WIRE LT GRN/RED WIRE ORG/ WIRE PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PNK SHRR WIRE PNK WIRE PNK/BLU WIRE REAR HEIGHT CONTROL SENSOR (UNDER CENTER REAR OF VEHICLE) RED WIRE RIGHT END OF DASH) RIGHT REAR HEIGHT CONTROL SENSOR (RIGHT SIDE OF LUGGAGE COMPT) SHORT CONNECTOR SHRL SPEEDO- METER STEERING SENSOR (INSIDE TOP OF STEERING COLUMN) VIO WIRE VIO/GRN WIRE VIO/YEL WIRE W/ ELECTRONIC MODULATED AIR SUSPENSION W/O ELECTRONIC MODULATED AIR SUSPENSION WHT WIRE WHT/BLK WIRE YEL WIRE

16, 17 (BEHIND UPPER CENTER OF DASH) 3 2 1 +B SI GND 6 16 5 15 TXS+ TXS- TX+ TX- A/C CONTROL ASSEMBLY A/C FUSE A/C PRESSURE SENSOR (ON LEFT FRONT OF ENGINE COMPT) A/C ROOM TEMPERATURE SWITCH (DRIVER'S SIDE) A/C ROOM TEMPERATURE SWITCH (FRONT PASSENGER'S SIDE) A/C SOLAR SENSOR (FRONT) (BEHIND UPPER CENTER OF DASH) COMPRESSOR ASSEMBLY A/C SOLAR SENSOR (REAR) (IF EQUIPPED) (NEAR CENTER OF REAR BLK WIRE BLK/BLU WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND LOWER RIGHT SIDE OF DASH) BLU WIRE BLU/YEL WIRE CLOCK (W/O NAVIGATION) INSTRUMENT PANEL REGISTER COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DGS TSRR DOME FUSE DOWN DRIVER SIDE J/B DUAL DUIND+ DRGND PAGND DUIND- EB (UNDER FUSIBLE LINK BLOCK) FUSE FUSIBLE LINK BLOCK (ON RIGHT REAR OF ENGINE COMPT) HEATER FUSE GATEWAY ECU (BEHIND LEFT END OF DASH) GAUGE FUSE (AT LEFT KICK PANEL) GND TC MPX+ MPX- GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRY WIRE GRY/BLK WIRE GTX+ GTX- HEATER CONTROL SWITCH (CENTER CLUSTER INTEGRATION PANEL) (W/O NAVIGATION) HEATER CONTROL SWITCH (MULTI-DISPLAY) (W/ NAVIGATION) HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START II (AT RIGHT SIDE OF SHIFT LEVER) IND JUNCTION CONNECTOR JUNCTION CONNECTOR 14, 15 (BEHIND UPPER CENTER OF DASH) LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE MPX- BLW SOL+ SOL- RDFGR IG MPX-IG FUSE MULTI-DISPLAY ORG/ WIRE P-ACC FUSE P-IG FUSE P/SB PASSENGER SIDE J/B PNK WIRE PNK/BLK WIRE PNK/BLU WIRE PRS TAMOUT PADN PAUP DRDN DRUP RADIO, PLAYER RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE SPEAKER SHELF, AT BASE OF REAR WINDOW) SPEEDOMETER COMBINATION METER 4 5 1 9 3 8 IG+ TAMO TSDR TSPA +B TSL TSR VIO WIRE VIO/RED WIRE VIO/WHT WIRE W/ NAVIGATION W/O NAVIGATION WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE

13 24 42 D/G TS WFSE 14 13 TD SIL 16 3 TACH TC 7 8 9 10 11 12 13 14 15 16 SIL AIR SUSPENSION ECU (BEHIND RIGHT SIDE OF DASH) BLK WIRE BLK/YEL WIRE BLU/BLK WIRE BRN WIRE CG SG CANH COMBINATION METER DRIVER SIDE J/B (AT LEFT KICK PANEL) EF (ON LEFT 1 2 3 4 5 6 CYLINDER HEAD) ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE HOT AT ALL TIMES J/C 13 (BEHIND UPPER CENTER OF DASH) J/C 16, 17 (BEHIND UPPER CENTER OF DASH) J/C 3, 4 (LEFT FRONT OF ENGINE COMPT) J/C 42 (CENTER OF DASH) LT GRN/BLK WIRE MULTI-DISPLAY OBD FUSE OPA TS TC CANL WFSE BAT PNK/BLK WIRE SIL SKID CONTROL ECU W/ ACTUATOR (BEHIND LEFT SIDE OF DASH) TAC WHT WIRE WHT/BLK WIRE WHT/GRN WIRE

13 2 10 12 1 MPX- MPX+ BUBS BLK WIRE BLK/WHT WIRE BLU WIRE BM (AT LEFT REAR QUARTERPANEL) BRN WIRE COMBINATION METER DOME FUSE FUSE FUSIBLE LINK BLOCK (ON RIGHT REAR OF ENGINE COMPT) GATEWAY ECU (BEHIND LEFT END OF DASH) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY WIRE HIGH MOUNTED STOP LIGHT HOT AT ALL TIMES HOT IN ON OR START DRIVER SIDE J/B (AT LEFT KICK PANEL) II (AT RIGHT SIDE OF SHIFT LEVER) IH (AT RIGHT SIDE OF SHIFT LEVER) J/C 12 (BEHIND UPPER CENTER OF DASH) J/C 10 (BEHIND UPPER CENTER OF DASH) J/C 16, 17 (BEHIND UPPER CENTER OF DASH) J/C 24, 25 (ON LEFT REAR OF LUGGAGE COMPT LID) JC-23 LCE LP FUSE LEFT LICENSE PLATE LIGHT RIGHT LICENSE PLATE LIGHT LEFT REAR COMBINATION LIGHT LUG J/B FUSE LUGGAGE ROOM J/B (ON LEFT SIDE OF LUGGAGE COMPARTMENT) LUGGAGE ROOM J/B ECU P-GND PASSENGER SIDE J/B PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PNK WIRE RED WIRE RIGHT REAR COMBINATION LIGHT SIDE MARKER LAMP STOP, TAIL LAMP STOP, TAIL LAMP SIDE MARKER LAMP TAIL IND (CANADA) TURN LAMP VIO WIRE VIO/GRN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

AFS ECU (RIGHT SIDE OF DASH) BLK WIRE BLK/RED WIRE BLU WIRE BLU/ORG WIRE BRN WIRE COMBINATION METER COMPUTER DATA LINES SYSTEM DOME FUSE DRIVER SIDE J/B (AT LEFT KICK PANEL) EA (AT RIGHT RADIATOR SIDE SUPPORT) EC (AT LEFT RADIATOR SIDE SUPPORT) ENGINE ROOM 1 J/B (ON LEFT FRONT OF ENGINE COMPT, BEHIND HEADLIGHT) ENGINE ROOM 1 R/B ENGINE ROOM 2 R/B (ON LEFT FRONT OF ENGINE COMPT, BEHIND HEADLIGHT) FHHL HLHL HLHR FFOG FOGL FOGR FRONT CONTROLLER FRONT FOG IND FUSE GATEWAY ECU (BEHIND LEFT END OF DASH) GAUGE FUSE GRN WIRE GRY WIRE H-LP HI FUSE FR FOG FUSE H-LP L LWR FUSE H-LP R LWR FUSE HEAD IND (USA) HEAD LP RELAY HIGH BEAM IND HOT AT ALL TIMES HOT IN ON OR START II (AT RIGHT SIDE OF SHIFT LEVER) JUNCTION CONNECTOR 10 (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR 12 (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR 16, 17 (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR 36, 41 (CENTER OF DASH) LEFT FRONT FOG LIGHT LEFT HEADLIGHT CONTROL ECU (BEHIND LEFT HEADLIGHT) LEFT HIGH BEAM HEADLIGHT LT GRN WIRE MAIN FUSIBLE LINK PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PNK WIRE PNK/BLU WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT FOG LIGHT RIGHT HEADLIGHT CONTROL ECU (BEHIND RIGHT HEADLIGHT) RIGHT HIGH BEAM HEADLIGHT VIO WIRE VIO/GRN WIRE WHT WIRE WHT/BLK WIRE YEL WIRE

1 10 2 13 4 IG BATT 10 5 TX- TX+ 16 6 15 5 TXS- TXS+ TX- TX+ 2 4 MPX+ MPX- 21 9 8 20 22 10 MTX- MTX+ ATX+ ATX- UTX- UTX+ 3 2 CPU 31 14 30 MPX 8 3 MPX- MPX+ 9 10 TXM+ TXM- A/C CONTROL ASSEMBLY AIR BAG AIR BAG SENSOR ASSEMBLY (FRONT OF CENTER CONSOLE) AUDIO, REAR A/C CONTROL SWITCH (W/ REAR POWER SEAT) BLK WIRE BLK/YEL WIRE BLU WIRE BLU/YEL WIRE CENTER CLUSTER INTEGRATION PANEL (W/O NAVIGATION SYSTEM) CG GND GTX+ GTX- COMBINATION METER D-ACC FUSE DRIVER SIDE J/B (AT LEFT KICK PANEL) FRONT PASSENGER DOOR ECU (INSIDE RIGHT FRONT DOOR) FUSE GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IH (AT RIGHT SIDE OF SHIFT LEVER) J/C 10, 11 (BEHIND UPPER CENTER OF DASH) J/C 12, 13 (BEHIND UPPER CENTER OF DASH) LT GRN WIRE MARK LEVINSON EXCEPT MARK LEVINSON MOON ROOF CONTROL ECU (IF EQUIPPED) (AT FRONT OF ROOF OPENING) MPX MPX RIGHT REAR SEAT ECU (IF EQUIPPED) (BEHIND RIGHT SIDE OF REAR SEAT BACK) MPX-IG FUSE MULTI-DISPLAY NAVIGATION ECU (IF EQUIPPED) (ON LOWER RIGHT SIDE OF LUGGAGE COMPARTMENT) ORG/ WIRE OVERHEAD J/B (AT FRONT OF ROOF OPENING) PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PASSENGER SIDE J/B ECU (AT RIGHT KICK PANEL) PNK PNK WIRE PNK WIRE PNK/BLU WIRE RADIO, PLAYER RAIN SENSOR (IF EQUIPPED) (NEAR TOP CENTER OF WINDSHIELD) RED WIRE RED/BLU WIRE RIGHT REAR DOOR ECU (INSIDE RIGHT REAR DOOR) SIL STEREO COMPONENT AMPLIFIER (ON RIGHT SIDE OF LUGGAGE COMPARTMENT, BEHIND TRIM) STEREO COMPONENT TUNER (ON LOWER RIGHT SIDE OF LUGGAGE COMPARTMENT) TELEPHONE TRANSCEIVER, SPEAKER RELAY (ON LEFT SIDE OF LUGGAGE COMPARTMENT) TX+ MTX+ TX- MTX- TXD- RTX- TXD+ RTX+ VIO WIRE VIO/GRN WIRE W/ MAYDAY SYSTEM W/ NAVIGATION SYSTEM WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE

+B AUI- AUO- VOL+ VOL- REV 1 2 3 4 5 6 7 8 9 10 +B IG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 IG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 AUI+ AUO+ PNK WIRE 1 2 3 4 5 6 7 8 9 10 VR BACK BLK WIRE BLU WIRE BLU/YEL WIRE BO (AT RIGHT REAR QUARTERPANEL) BRN WIRE CANL CANH VG CG BATT CGND CB+ COMPUTER DATA LINES SYSTEM CV- CV+ D-ACC FUSE DRIVER MPX-IG SIDE J/B FUSE (AT LEFT KICK PANEL) GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE GRY WIRE GRY/BLK WIRE GTX+ SIL GTX- HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START J/C 10, 11 (BEHIND UPPER CENTER OF DASH) J/C 30 (REARWARD OF RIGHT REAR FENDERWELL) J/C 36, 37 (CENTER OF DASH) J/C 45, 47 (RIGHT SIDE OF DASH) J/C 49, 50 (RIGHT REAR OF VEHICLE) LT BLU WIRE LT GRN WIRE LUGGAGE ROOM J/B MIC - MPX NAVIGATION ECU (ON LOWER RIGHT SIDE OF LUGGAGE COMPT) NCA WIRE ORG/ WIRE PASSENGER SIDE J/B ECU (AT RIGHT KICK PANEL) PASSENGER SIDE J/B FUSE (AT RIGHT KICK PANEL) PNK/BLU WIRE RED WIRE RED/BLU WIRE RR ACC FUSE RR ECU-B FUSE RR IG FUSE SNSE SOUND SYSTEMS SYNC TEL FUSE TELEVISION CAMERA TELEVISION CAMERA ECU (RIGHT REAR OF LUGGAGE COMPT) TX+ TX- SYNC VR TX+ VG VIO WIRE VIO/GRN WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE

BLK WIRE BLU WIRE BRN WIRE CLS COMBINATION METER CTY CTY CTY DOOR LOCK CONTROL RECEIVER DATA RSSI DOWN UP OPN DRIVER DOOR ECU (INSIDE FRONT OF LEFT FRONT DOOR) DRIVER SIDE J/B (AT LEFT KICK PANEL) GAUGE FUSE DWN UP GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY WIRE HOT AT ALL TIMES HOT AT ALL TIMES DOME FUSE FUSE HOT IN ON OR START IG OPN CLS II (AT RIGHT SIDE OF SHIFT LEVER) IK (AT RIGHT SIDE OF DASH) J/C 10, 12 (BEHIND UPPER CENTER OF DASH) J/C 14 (BEHIND UPPER CENTER OF DASH) J/C 16, 17 (BEHIND UPPER CENTER OF DASH) LEFT FRONT DOOR COURTESY SWITCH (AT LEFT "B" PILLAR) LEFT REAR DOOR COURTESY SWITCH (AT LEFT "C" PILLAR) LEFT REAR DOOR ECU (INSIDE LEFT REAR DOOR) LT GRN WIRE LT GRN/RED WIRE LUGGAGE ROOM J/B (ON LEFT SIDE OF LUGGAGE COMPT) MOON ROOF CONTROL ECU (AT FRONT OF ROOF OPENING) MPX OF DASH) ORG/ WIRE OVERHEAD J/B (AT FRONT OF ROOF OPENING) IG P-IG FUSE PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PNK PNK WIRE PNK WIRE PNK/BLU WIRE RDA RSSI RED WIRE RED/BLK WIRE RED/YEL WIRE S/ROOF FUSE STEERING LOCK ECU (LEFT SIDE THEFT DETERRENT ECU (BEHIND UPPER RIGHT CENTER OF DASH) W/ SMART KEY W/O SMART KEY WHT WIRE WHT/BLK WIRE YEL WIRE

2 23 25 30 AUTO MUP MDN PWE 2 3 8 19 20 6 4 16 5 25 17 26 23 1 DN UP PLS LMT SGND BDR CPUB WLSW SIG BLK/BLU WIRE BLK/WHT WIRE BLU/WHT WIRE BRN/WHT WIRE CTY GND FRONT DOOR) FRONT PASSENGER DOOR ECU (INSIDE RIGHT FRONT DOOR) FUSE GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE GRY/GRN WIRE HOT AT ALL TIMES IR (UNDER RIGHT FRONT SEAT) JUNCTION CONNECTOR 10, 11 (BEHIND UPPER CENTER OF DASH) LMT LT BLU WIRE ORG/ WIRE P DOOR FUSE PASSENGER SIDE J/B (AT RIGHT KICK PANEL) PCT PLS PNK WIRE PNK/BLU WIRE PNK/GRN WIRE RED WIRE RED/BLU WIRE RED/GRN WIRE RIGHT FRONT DOOR COURTESY SWITCH (AT RIGHT "B" PILLAR) RIGHT FRONT POWER WINDOW CONTROL SWITCH RIGHT FRONT POWER WINDOW MOTOR (IN RIGHT VIO WIRE VIO/GRN WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 -B 6 21 GTX+ GTX- AMP P P/SEAT FUSE ATX+ MTX+ UTX+ MUTE ATX- MTX- UTX- BLK WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BO (AT RIGHT REAR QUARTERPANEL) BRN WIRE GATEWAY ECU (BEHIND LEFT END OF DASH) GRN WIRE GRY WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT WITH L-ACC RELAY ENERGIZED IJ (AT RIGHT DASH BRACE) J/C 28, 29 (REARWARD OF RIGHT REAR FENDERWELL) JUNCTION CONNECTOR 14, 15 (BEHIND UPPER CENTER OF DASH) JUNCTION CONNECTOR 28, 29 (REARWARD OF RIGHT REAR FENDERWELL) JUNCTION CONNECTOR 30 LT GRN WIRE LUGGAGE ROOM J/B (ON LEFT SIDE OF LUGGAGE COMPT) MULTI-DISPLAY NCA WIRE P-ACC FUSE PASSENGER SIDE J/B (AT RIGHT KICK PANEL) RADIO 1 FUSE PNK WIRE R- L- GND RADIO, PLAYER RED WIRE RR ACC FUSE RR ECU-B FUSE RR+ RR- RL+ RL- MUTE SG FR+ FL+ STEREO COMPONENT TUNER (ON LOWER RIGHT SIDE OF LUGGAGE COMPARTMENT) TEL FUSE TX+ TXS+ MUTE R+ L+ SGND TX- TXS- TXM- TXM+ W/ NAVIGATION WHT WIRE WHT/BLK WIRE YEL WIRE