Lexus IS I (1999-2005) body ecu (behind lower left end of dash, integral with driver side j/b) Wiring diagrams

1 2 4 5 6 7 PRG RDA LSR RCTY DCTY LGCY 2 6 12 BECU BACK DOOR COURTESY SWITCH BLK/RED WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BSUB BZR DOOR FUSE DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE FLASHER RELAY GRN/WHT WIRE GROUND GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START J/C 12 (ABOVE LEFT LEFT REAR WHEELWELL) J/C 17 (ABOVE LEFT REAR FENDERWELL) JUNCTION CONENCTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) JUNCTION CONNECTOR 16 (ABOVE RIGHT REAR FENDERWELL) JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH, FORWARD OF INSTRUMENT CLUSTER) KEYLESS BUZZER (NEAR TOP OF LEFT FRONT WHEELWELL, INSIDE FENDER) LEFT FRONT DOOR COURTESY SWITCH LEFT REAR DOOR COURTESY SWITCH LEFT REAR DOOR LOCK DETECTION SWITCH LUGGAGE COMPT DOOR COURTESY SWITCH ORG/ WIRE PCTY HAZ LSWP RADIO 2 FUSE RED/BLK WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR COURTESY SWITCH RIGHT REAR DOOR COURTESY SWITCH SEDAN SEDAN WAGON TAIL RELAY WAGON WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 PRG RDA DBKL LSR RCTY DCTY LGCY TR+ RLU RLD 1 2 3 4 5 6 7 BSUB BECU IG 8 9 ILE ACT+ ANTI-THEFT SYSTEM BLK/RED WIRE BLK/YEL WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN/WHT WIRE BZR PU PD COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DFG DOOR FUSE DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE FE FR GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START HOT W/ TAIL RELAY ENERGIZED INSTRUMENT CLUSTER SYSTEM INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM INTERIOR LIGHTS SYSTEM DOOR LOCKS SYSTEM EXTERIOR LIGHTS SYSTEM JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) KSW PML PCTY PMUL HAZ DCLP PCLP BDSU LSWP MPX-B FUSE ORG/ WIRE PANEL FUSE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK/BLK WIRE POWER WINDOWS SYSTEM POWER WINDOWS SYSTEM ENGINE CONTROLS SYSTEM POWER WINDOWS SYSTEM POWER TOPS SYSTEM RADIO 2 FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE TAIL RRU RRD TRUNK, TAILGATE, FUEL DOORS SYSTEM WAGON WARNING SYSTEM DOOR LOCKS SYSTEM WHT WIRE WHT/BLK WIRE YEL/BLK WIRE YEL/RED WIRE

16 20 22 3 TACH 19 3 12 TC LA SIL A/C CONTROL ASSEMBLY BK (AT RIGHT FRONT FLOOR PANEL) BLK WIRE BLK/YEL WIRE BLU WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN WIRE CENTER AIR BAG SENSOR ASSEMBLY (BELOW CENTER OF DASH, ON TRANSMISSION TUNNEL) CG SG A/B SIL COMBINATION METER D/G DATA LINK CONNECTOR 3 (BEHIND LOWER LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EB (AT CENTER LEFT SIDE OF INTAKE MANIFOLD) ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) HOT AT ALL TIMES OBD FUSE IH (AT RIGHT SIDE OF FIREWALL) J/C 16 (SEDAN) (ABOVE RIGHT REAR FENDERWELL) LT GRN WIRE MPX MPX+ MPX- MULTI-DISPLAY ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) POWER WINDOW MASTER SWITCH RED/WHT WIRE SIL SKID CONTROL ECU TAC TC TS WFSE BAT THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) VIO WIRE WAGON WFSE TC WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL/RED WIRE

1 2 7 5 4 6 PRG RDA LGCY RCTY LSR DCTY 13 19 5 12 11 1 7 9 14 8 BDSU 3 4 1 IG BACKDOOR OPENER SWITCH (WAGON) BK (AT RIGHT FRONT FLOOR PANEL) BL (AT LEFT REAR QUARTERPANEL) BK (AT RIGHT FRONT FLOOR PANEL) BLK WIRE BLK/RED WIRE BLU WIRE BLU/RED WIRE BLU/YEL WIRE BN (AT RIGHT UPPER SIDE OF BACK PANEL) BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN WIRE BSUB DOME FUSE DOOR FUSE DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EB (AT CENTER LEFT SIDE OF INTAKE MANIFOLD) ECU-IG FUSE GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START ID (AT LEFT SIDE OF FIREWALL) IGNITION KEY CYLINDER LIGHT IH (AT RIGHT SIDE OF FIREWALL) J/C 15 (BEHIND LEFT FENDERWELL) J/C 16 (ABOVE RIGHT REAR FENDER- WELL) J/C 16 (ABOVE RIGHT REAR FENDERWELL) J/C 5 (ABOVE DRIVER SIDE J/B) J/C 7 (BEHIND UPPER RIGHT SIDE OF DASH) LEFT FRONT DOOR COURTESY LIGHT LEFT FRONT DOOR COURTESY SWITCH LEFT REAR DOOR LOCK DETECTION SWITCH LT GRN WIRE LT GRN/BLK WIRE MPX-B FUSE ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PCLP DCLP PML PMUL LSWP PCTY RADIO 2 FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT DOOR LOCK CONTROL SWITCH RIGHT FRONT DOOR COURTESY LIGHT RIGHT FRONT DOOR COURTESY SWITCH RIGHT FRONT DOOR LOCK DETECTION SWITCH RIGHT REAR DOOR LOCK DETECTION SWITCH SEDAN SIL CG SG SRS-B FUSE 7.5 WAGON WHT WIRE WHT/BLK WIRE YEL WIRE YEL/RED WIRE

BLK WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN WIRE COMBINATION METER DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EC (AT LEFT FENDER APRON) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPARTMENT) ER EL FLASHER RELAY GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/YEL WIRE HAZARD SWITCH (A/C CONTROL ASSEMBLY) HAZD HOT AT ALL TIMES HOT IN ON IH (AT RIGHT SIDE OF FIREWALL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER ID SIDE J/B) JUNCTION CONNECTOR 7 (BEHIND UPPER RIGHT SIDE OF DASH) LEFT FRONT PARKING LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT FRONT SIDE TURN SIGNAL LIGHT RIGHT FRONT TURN SIGNAL LIGHT LEFT FRONT TURN SIGNAL LIGHT LEFT TURN SIGNAL IND RIGHT TURN SIGNAL IND PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK WIRE RIGHT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT RIGHT FRONT SIDE TURN SIGNAL LIGHT RIGHT LEFT TURN SIGNAL SWITCH (COMBINATION SWITCH) TURN, HAZ FUSE WHT WIRE YEL WIRE

BLK WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN WIRE COMBINATION METER DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EC (AT LEFT FENDER APRON) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPARTMENT) ER EL FLASHER RELAY GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/YEL WIRE HAZARD SWITCH (A/C CONTROL ASSEMBLY) HAZD HOT AT ALL TIMES HOT IN ON IH (AT RIGHT SIDE OF FIREWALL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ID ABOVE DRIVER SIDE J/B) JUNCTION CONNECTOR 7 (BEHIND UPPER RIGHT SIDE OF DASH) LEFT FRONT PARKING LIGHT LEFT FRONT SIDE MARKER LIGHT LEFT FRONT SIDE TURN SIGNAL LIGHT RIGHT FRONT TURN SIGNAL LIGHT LEFT FRONT TURN SIGNAL LIGHT LEFT TURN SIGNAL IND RIGHT TURN SIGNAL IND PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK WIRE RIGHT FRONT PARKING LIGHT RIGHT FRONT SIDE MARKER LIGHT RIGHT FRONT SIDE TURN SIGNAL LIGHT RIGHT LEFT TURN SIGNAL SWITCH (COMBINATION SWITCH) TURN, HAZ FUSE WHT WIRE YEL WIRE

2 9 10 11 12 13 14 20 21 22 TAIL CLTB IG 4 5 6 7 LSR RCTY DCTY LGCY ANTI-THEFT SYSTEM AUTOMATIC LIGHT CONTROL SENSOR (ON TOP LEFT SIDE OF DASH) BL (AT LEFT REAR QUARTERPANEL) BLK/RED WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BN (AT RIGHT UPPER SIDE OF BACK PANEL) BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN WIRE BSUB CLTB CLTE CLTS CLTS CLTE COMBINATION SWITCH COMPUTER DATA LINES SYSTEM DIMMER SWITCH DIODE (FOG LIGHT) DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) DOOR FUSE FOGLIGHT SWITCH FUSE GRN WIRE GRN/ORG WIRE GRN/YEL WIRE HEAD HIGH HIGH LOW FLASH FLASH LOW HOT AT ALL TIMES HOT IN ACC OR RUN HOT W/ TAIL RELAY ENERGIZED JUNCTION CONNECTOR 15 (BEHIND LEFT FENDERWELL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) LEFT REAR FOG LIGHT (LEFT REAR COMBINATION LIGHT) LIGHT CONTROL SWITCH MPX-B FUSE OFF ON OFF ON ORG/ WIRE PANEL FUSE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PCTY LSWP RADIO 2 FUSE REAR FOG LIGHT SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT REAR FOG LIGHT (RIGHT REAR COMBINATION LIGHT) SEDAN SOLID STATE TAIL TAIL HEAD HEAD AUTO OFF OFF AUTO THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) W/ REAR FOG LIGHT W/O REAR FOG LIGHT WAGON WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE

1 2 4 5 6 7 8 PRG RDA LSR RCTY DCTY LGCY TR+ 2 6 12 BECU ABOVE DRIVER SIDE J/B) ID (AT LEFT SIDE BACK DOOR OPENER SWITCH (WAGON) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BSUB BZR DOOR FUSE DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE FENDERWELL) FLASHER RELAY FORWARD OF INSTRUMENT CLUSTER) GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START JUNCTION CONNECTOR 16 (ABOVE RIGHT REAR JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH, KEYLESS BUZZER (NEAR TOP OF LEFT FRONT WHEELWELL, INSIDE FENDER) KSW PML PCTY PMUL HAZ BDSU LSWP LEFT FRONT DOOR COURTESY SWITCH LEFT REAR DOOR COURTESY SWITCH LEFT REAR DOOR LOCK MOTOR, DOOR LOCK DETECTION SWITCH LOCK DETECTION OF FIREWALL) ORG/ WIRE RADIO 2 FUSE RED/BLK WIRE RED/BLU WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR COURTESY SWITCH RIGHT REAR DOOR COURTESY SWITCH UNLOCK WARNING SWITCH WAGON SEDAN WHT WIRE WHT/BLK WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 PWR PWL 6 10 9 DCTY RLD RLU BLK WIRE BLK/BLU WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN/WHT WIRE BSUB COMPUTER DATA LINES SYSTEM D FR P/W FUSE D RR P/W FUSE DCTY DOOR FUSE DOWN DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/YEL WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START JUNCTION CONNECTOR 15 (ON LEFT SIDE OF LUGGAGE COMPT, BEHIND LEFT FENDERWELL) JUNCTION CONNECTOR 16 (ABOVE RIGHT REAR FENDERWELL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) LEFT FRONT DOOR COURTESY SWITCH LEFT FRONT POWER WINDOW MOTOR LEFT REAR POWER WINDOW CONTROL SWITCH LEFT REAR POWER WINDOW MOTOR LIMIT SW ORG/ WIRE P FR P/W FUSE MPX-B FUSE P RR P/W FUSE P/W RELAY PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) POWER WINDOW MASTER SWITCH PULSE SENSOR PW BDM RADIO 2 FUSE RED WIRE RED/GRN WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT POWER WINDOW CONTROL SWITCH RIGHT REAR POWER WINDOW CONTROL SWITCH RIGHT REAR POWER WINDOW MOTOR RIGIHT FRONT POWER WINDOW MOTOR RRD RRU PU PD SEDAN WAGON SGND PLS LMT WHT WIRE WHT/BLK WIRE WHT/GRN WIRE YEL WIRE YEL/BLK WIRE YEL/RED WIRE

3 6 DBKL DCTY A/C CONTROL ASSEMBLY BJ (AT LEFT FRONT FLOOR PANEL) BJ (AT LEFT FRONT FLOOR PANEL) BEHIND LEFT FENDERWELL) BL BK (AT RIGHT FRONT FLOOR PANEL) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BODY ECU (BEHIND LOWER LEFT END OF DASH, INTEGRAL WITH DRIVER SIDE J/B) BRN/WHT WIRE BSUB BUZZER CENTER) IE COMBINATION METER COMPUTER DATA LINES SYSTEM DOOR FUSE DOOR IND DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT) GAUGE FUSE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START J/C 13 (ABOVE LEFT REAR FENDERWELL) J/C 15 (ON LEFT SIDE OF LUGGAGE COMPT) J/C 5 (BEHIND LEFT SIDE OF DASH, ABOVE DRIVER SIDE J/B) J/C 6 (BEHIND LEFT SIDE OF DASH) LEFT BUCKLE SWITCH LEFT FRONT DOOR COURTESY SWITCH LT GRN WIRE LT GRN/BLK WIRE MPX MPX-B FUSE SRS-B FUSE ORG/ WIRE P-S/B PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK WIRE PNK/BLK WIRE PNK/GRN WIRE RADIO 2 FUSE RED WIRE RED/BLU WIRE RED/GRN WIRE RED/YEL WIRE RIGHT BUCKLE SWITCH, SEAT BELT WARNING OCCUPANT DETECTION SENSOR SEAT BELT IND THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) UNLOCK WARNING SWITCH W/ POWER SEAT W/ POWER SEATS W/O POWER SEATS WAGON SEDAN WHT WIRE WHT/BLK WIRE YEL WIRE