Lexus IS I (1999-2005) ih (at right side of firewall) Wiring diagrams

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 SRLR ABS 1 FUSE ABS 2 FUSE ABS MTR RELAY ABS SOL RELAY AST SRLH SFRR BLK WIRE BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE EC (AT LEFT FENDER APRON) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM 2 R/B (ON RIGHT REAR OF ENGINE COMPT) FL- FL+ FR+ FR- FSS MT GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES ID (AT LEFT SIDE OF FIREWALL) IH (AT RIGHT SIDE OF FIREWALL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) LEFT FRONT ABS SPEED SENSOR LT GRN WIRE MR MRF LBL NCA WIRE ORG/ WIRE PRESSURE SENSOR RED/YEL WIRE RELAY RIGHT FRONT ABS SPEED SENSOR SFLH SFLR SRRH SRRR SR SFRH SKID CONTROL ECU (LEFT SIDE OF DASH) VIO WIRE WHT/BLK WIRE WHT/BLU WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 WA 2 3 1 SE A/C CONTROL ASSEMBLY A/T A/T M/T ABS IND. BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRAKE IND BRAKE PEDAL LOAD SENSING SWITCH BRL ENG+ TS TRC+ BRN WIRE COMBINATION METER COMPUTER DATA LINES SYSTEM D/G DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ENG ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) FRO FSW- FSW+ GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES STOP FUSE HOT IN ON OR START ECU-IG FUSE HOT IN ON OR START GAUGE FUSE IH (AT RIGHT SIDE OF FIREWALL) IND JUNCTION CONNECTOR JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH, FORWARD OF INSTRUMENT CLUSTER) LEFT REAR ABS SPEED SENSOR LT GRN WIRE LT GRN/RED WIRE M/T MPX- SNOW NEO PARKING BRAKE SWITCH (AT BASE OF PARKING BRAKE LEVER) PNK ENG- WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT REAR ABS SPEED SENSOR RR- RR+ SKID CONTROL ECU (LEFT SIDE OF DASH) SLIP IND SNOW SPEED- DOMETER STOPLIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) STP WT TRAC OFF TRAC OFF IND TRAC OFF SWITCH, SNOW SWITCH TRC+ TRC- PKB RL+ RL- VEHICLE SPEED SENSOR (M/T) (ON LEFT REAR OF TRANSMISSION) WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL/GRN WIRE YEL/RED WIRE

+BI MR MRF LBL- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 SRLR ABS 1 FUSE (ON RIGHT REAR OF ENGINE COMPT) ABS 2 FUSE ABS MTR RELAY ABS SOL RELAY AST SRLH SFRR BLK WIRE BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN/WHT WIRE EC (AT LEFT FENDER APRON) ENGINE ROOM 1 R/B ENGINE ROOM 2 R/B (ON RIGHT REAR OF ENGINE COMPT) FL- FL+ FR+ FR- FSS MT FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE HOT AT ALL TIMES ID (AT LEFT SIDE OF FIREWALL) IH (AT RIGHT SIDE OF FIREWALL) JUNCTION CONNECTOR 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) LEFT FRONT ABS SPEED SENSOR LT GRN WIRE NCA WIRE ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PMC PRESSURE SENSOR 1 PRESSURE SENSOR 2 RED WIRE RED/YEL WIRE RELAY RIGHT FRONT ABS SPEED SENSOR SFLH SFLR SRRH SRRR SR SFRH SKID CONTROL ECU (LEFT SIDE OF DASH) VCM VIO WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 VYS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 WA ABS IND. BAT TRIG BJ (AT LEFT FRONT FLOOR PANEL) BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE BRAKE IND BRAKE PEDAL LOAD SENSING SWITCH BRL ENG+ TS TRC+ BRN WIRE BRN/WHT WIRE COMBINATION METER COMPUTER DATA LINES SYSTEM D/G DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECU-IG FUSE ENG ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) FRO VSCW RR- RR+ GAUGE FUSE GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRY WIRE GSS GYAW HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN ON OR START IE (AT LEFT FRONT FLOOR PANEL CENTER) IH (AT RIGHT SIDE OF FIREWALL) JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE OF DASH, FORWARD OF INSTRUMENT CLUSTER) JUNCTION CONNECTOR 7 (BEHIND UPPER RIGHT SIDE OF DASH) LEFT REAR ABS SPEED SENSOR LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE NCA WIRE NEO PARKING BRAKE SWITCH (AT BASE OF PARKING BRAKE LEVER) PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK ENG- WIRE PNK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT REAR ABS SPEED SENSOR SKID CONTROL ECU (LEFT SIDE OF DASH) SLIP IND SPEED- DOMETER STEERING SENSOR (AT BASE OF STEERING COLUMN) STOP FUSE STOPLIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) STP WT BZ IND TRAC OFF IND TRAC OFF SWITCH TRC+ TRC- PKB RL+ RL- +BO VSC IND VSC WARNING BUZZER VYS WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YAW RATE SENSOR YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE YSS FSW- FSW+ TRIG CSW

5 18 9 6 15 10 BDM TX ALT FUSE BK (AT RIGHT FRONT FLOOR PANEL) BLK WIRE BLK/ WHT WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/BLK WIRE BLU/RED WIRE BLU/YEL WIRE DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EFI FUSE EFI RELAY ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM 2 R/B (ON RIGHT REAR OF ENGINE COMPT) GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE HEAD LP RELAY HEADLIGHTS SYSTEM HORN FUSE HORN RELAY HORN SYSTEM HOT AT ALL TIMES IH (AT RIGHT SIDE OF FIREWALL) J/C 12 (ABOVE LEFT REAR FENDERWELL) J/C 17 (ABOVE LEFT REAR FENDERWELL) (SEDAN) JUNCTION CONNECTOR 15 (ON LEFT SIDE OF LUGGAGE COMPT, BEHIND LEFT FENDERWELL) JUNCTION CONNECTOR 16 (ABOVE RIGHT REAR FENDERWELL) KL KUL LSWD LEFT FRONT DOOR KEY LOCK, UNLOCK SWITCH, DOOR LOCK DETECTION SWITCH LOCK DETECT LUGGAGE COMPARTMENT DOOR KEY UNLOCK SWITCH MAIN FUSE ORG/ WIRE POWER WINDOW MASTER SWITCH RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RIGHT FRONT DOOR LOCK DETECTION SWITCH RIGHT REAR DOOR LOCK DETECTION SWITCH SEDAN UNLK LOCK WAGON WHT WIRE WHT/BLK WIRE YEL/RED WIRE

1 2 3 4 (5-6 NOT USED) 7 8 (9-11 NOT USED) 12 1 4 11 13 17 30 31 EOM BATT KSW MREL IGSW IMLD CODE A/C CONTROL ASSEMBLY BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BRN WIRE CODE COMBINATION METER DATA LINK CONNECTOR 3 (BEHIND LOWER LEFT SIDE OF DASH) DOME FUSE MPX-B FUSE DOOR DL FUSE DSWH LUG NAVI EC (AT LEFT FENDER APRON) ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE HOOD COURTESY SWITCH (ON FRONT CENTER OF ENGINE COMPT, NEAR HOOD LATCH) FUSE GRN WIRE GRN/BLK WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND HOT AT ALL TIMES HOT IN ON OR START IGN FUSE IH (AT RIGHT SIDE OF FIREWALL) IND IND SECURITY J/C 3 (NEAR ENGINE CONTROL MODULE) J/C 5 (ABOVE DRIVER SIDE J/B) J/C 6 (BEHIND LEFT SIDE OF DASH, FORWARD OF INSTRUMENT CLUSTER) J/C 7 (BEHIND UPPER RIGHT SIDE OF DASH) MPX MULTI- DISPLAY DR ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RXCK SH- SH HORN SIL CG THEFT DETERRENT ECU (BEHIND LEFT END OF DASH) THEFT DETERRENT HORN (ON LEFT SIDE OF ENGINE COMPT, ON STRUT TOWER) TRANSPONDER KEY AMPLIFIER (ON STEERING COLUMN, NEAR IGNITION SWITCH) TXCT TXCT RXCK UNLOCK WARNING SWITCH VIO WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 HAZD AIF AOD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 MPX- 1 2 M+ M- 16 25 18 ACMG PRE TAM 3 2 1 +B SI GND A/C AMBIENT TEMPERATURE SENSOR (BEHIND LEFT A/C COMP RELAY A/C CONDENSER FAN MOTOR A/C CONTROL ASSEMBLY A/C DIODE (BEHIND RIGHT END OF DASH) A/C FUSE A/C MAGNETIC CLUTCH, LOCK SENSOR (ON LEFT FRONT OF ENGINE, ON A/C COMPRESSOR) A/C THERMISTOR A/C TRIPLE PRESSURE AIR INLET CONTROL SERVO MOTOR (BEHIND UPPER RIGHT SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (BEHIND UPPER RIGHT CENTER OF DASH) AIR VENT MODE CONTROL SERVO MOTOR (BEHIND UPPER RIGHT CENTER OF DASH) AT RIGHT SIDE OF FIREWALL) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND LOWER RIGHT END OF DASH) BLOWER MOTOR CONTROLLER (BEHIND UPPER RIGHT CENTER OF DASH) BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CENTER OF FRONT BUMPER FASCIA) CONNECTOR 3 DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) DUAL ECU-IG FUSE ENGINE COMPT, NEAR ENGINE CONTROL MODULE) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM 3 R/B (ON LEFT SIDE OF ENGINE COMPT) FAN FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY FRONT WIPER MOTOR (IN ENGINE COMPT, BELOW LOWER +2 LEFT SIDE OF WINDSHIELD) GRN WIRE GRN/WHT WIRE GRY WIRE GRY/BLU WIRE GRY/RED WIRE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START HR WIP BLW SNOW ILL- ILL+ IG HTR RELAY IG (AT RIGHT DASH REINFOR- CEMENT) IH (AT RIGHT SIDE OF FIREWALL) INSTRUMENT CLUSTER SYSTEM JUNCTION CONNECTOR JUNCTION CONNECTOR 10 (BEHIND UPPER RIGHT SIDE OF DASH) JUNCTION CONNECTOR 19 JUNCTION CONNECTOR 2 (ON LEFT SIDE OF JUNCTION CONNECTOR 8 (BEHIND UPPER RIGHT SIDE OF DASH) LT GRN/RED WIRE MPX+ AIR AOF AMC AMH TP TPI TR MPX-B FUSE ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PKB PWR P-S/B PNK WIRE PNK/BLK WIRE PNK/BLU WIRE PNK/GRN WIRE RADIATOR FAN MOTOR RADIO 2 FUSE RDI FAN FUSE CDS FAN FUSE RED WIRE RED/WHT WIRE RED/YEL WIRE SINGLE SWITCH (ON LEFT FRONT OF ENGINE COMPT, BEHIND BUMPER FASCIA) TRANSMISSIONS SYSTEM TRANSMISSIONS SYSTEM INTERIOR LIGHTS SYSTEM TS TPM TE VIO WIRE VIO/WHT WIRE WARNING SYSTEM WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE YEL/GRN 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

18 8 16 7 1 GND +B IG A/C CONDENSER FAN MOTOR A/C CONTROL ASSEMBLY A/C DIODE (BEHIND RIGHT END OF DASH) A/C SINGLE PRESSURE SWITCH ACMG BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CDS FAN FUSE DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EC (AT LEFT FENDER APRON) ECU-IG FUSE ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM R/B 3 (ON LEFT SIDE OF ENGINE COMPT) FAN FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY GRY WIRE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IH (AT RIGHT SIDE OF FIREWALL) INSTRUMENT CLUSTER SYSTEM JUNCTION CONNECTOR 10 (BEHIND UPPER RIGHT SIDE OF DASH) JUNCTION CONNECTOR 19 JUNCTION CONNECTOR 3 (ON LEFT SIDE OF ENGINE COMPT, NEAR ENGINE CONTROL MODULE) MPX MPX-B FUSE ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) RADIATOR FAN MOTOR RADIO 2 FUSE RDI FAN FUSE RED WIRE RED/YEL WIRE WATER TEMPERATURE SWITCH (ON RIGHT SIDE OF RADIATOR) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE

+B +BM STT- MREL IGSW 1 2 4 5 6 7 8 13 17 EOM EC BATT 3 4 13 14 20 21 31 32 33 34 35 TC STP D/CLSW 4 A/T BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE CL CL+ COMPUTER DATA LINES SYSTEM CRUISE CONTROL CLUTCH SWITCH DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EA (AT FRONT OF INTAKE MANIFOLD) EC (AT LEFT FENDER APRON) EFI RELAY ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE ROOM 1 R/B (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM 2 R/B (ON RIGHT REAR OF ENGINE COMPT) ETCS FUSE EFI FUSE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON OR START HOT IN ON OR START GAUGE FUSE ECU- IG FUSE IH (AT RIGHT SIDE OF FIREWALL) J/C 4 (ON LEFT SIDE OF ENGINE COMPT, NEAR ENGINE CONTROL MODULE) JUNCTION CONNECTOR 1, 2 JUNCTION CONNECTOR 1, 2 (NEAR ENGINE CONTROL MODULE) JUNCTION CONNECTOR 6 (BEHIND LEFT SIDE LT GRN/BLK WIRE M- M+ M/T NCA WIRE OF DASH, FORWARD OF INSTRUMENT CLUSTER) ORG/ WIRE PARK/NEUTRAL POSITION SWITCH (ON RIGHT SIDE OF TRANSMISSION) PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) IGN FUSE PASSENGER SIDE J/B (BEININD LOWER RIGHT END OF DASH) PNK/BLU WIRE RED WIRE RED/BLU WIRE RED/WHT WIRE STOP FUSE STOPLIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) TRANSMISSION CONTROL SWITCH (SHIFT LOCK CONTROL ECU) WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/RED WIRE