Lexus IS I (1999-2005) engine controls system Wiring diagrams

+B IGSW +BM SIL STA 13 4 1 2 5 6 17 7 26 12 MREL BATT EOM EC 24 26 27 32 1 2 3 THW EVG VG THA 4 34 20 3 22 21 5 6 STP A/C CONTROL ASSEMBLY A/T SHIFT MAIN SWITCH (INTEGRAL TO COMBINATION SWITCH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DATA LINK CONNECTOR 3 (BEHIND LOWER LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EA (FRONT OF INTAKE MANIFOLD) EB (CENTER SIDE OF INTAKE MANIFOLD) EC (LEFT FRONT FENDER APRON) EFI FUSE EFI RELAY ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (ON LEFT FRONT OF ENGINE) ENGINE ROOM R/B 1 (ON RIGHT REAR OF ENGINE COMPT) ENGINE ROOM R/B 2 (ON RIGHT REAR OF ENGINE COMPT) ETCS FUSE EVG GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRY/GRN WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN OR START IGN FUSE IH (BEHIND RIGHT KICK PANEL) IH (RIGHT SIDE OF FIREWALL) J/C 3 (NEAR ECM) J/C 7 (BEHIND UPPER RIGHT SIDE OF DASH) LT GRN WIRE MASS AIRFLOW METER (RIGHT SIDE OF ENGINE COMPT, BEHIND AIR BOX) MPX ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PWR RED WIRE RED/WHT WIRE SFTD SFTU SIL SNOW SNOW PWR STARTING/ CHARGING SYSTEM STOP FUSE STOPLIGHT SWITCH (ABOVE BRAKE PEDAL, ON BRACKET) TC WFSE THA WFSE WHT WIRE WHT/BLK WIRE

16 2 13 TACH 4 VPA ACCEL POSITION SENSOR (ON CENTER REAR OF ENGINE, ON THROTTLE BODY) BLK WIRE BLK/RED WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRAIDED BRN WIRE COMBI- NATION METER COMPUTER DATA LINES SYSTEM DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) EA (FRONT OF INTAKE MANIFOLD) EB (CENTER SIDE OF INTAKE MANIFOLD) ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (LEFT SIDE OF TRANSMISSION) ENGINE CONTROL MODULE (ECM) (LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE CONTROLS SYSTEM GAUGE FUSE GRN WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BLK WIRE HOT IN ON OR START J/C 1, J/C 2 (NEAR ECM) J/C 4 (NEAR ECM) LT GRN WIRE LT GRN/BLK WIRE M- M+ CL- CL+ NCA WIRE NCO+ NCO- O/D DIRECT CLUTCH SPEED SENSOR (LEFT SIDE OF TRANSMISSION) ORG/ WIRE PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PNK/BLU WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE SLT- SLT+ OIL SLU- SLU+ SLN- SLN+ SPEEDO TACH THROTTLE CONTROL MOTOR (ON THROTTLE BODY) THROTTLE POSITION SENSOR (ON THROTTLE BODY) VEHICLE SPEED SENSOR (LEFT REAR OF TRANSMISSION) VIO WIRE VTA BRAIDED WHT WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE YEL/GRN WIRE YEL/RED WIRE

13 14 FE FR 3 1 PKB MPX- 8 18 +B GND A/C CONTROL ASSEMBLY A/T ABS IND. ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM HEADLIGHTS SYSTEM BEAM IND BEAM LEVEL IND BLK WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE BODY ECU BRAKE FLUID LEVEL WARNING SWITCH (ON BRAKE FLUID RESERVOIR) BRAKE IND BRL PKB VSCW BRN WIRE BRN/WHT WIRE BUZZER CHARGE IND COMBINATION METER COMPUTER DATA LINES SYSTEM CRUISE IND DOOR IND DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) DRIVER SIDE SIDE J/B (BEHIND LOWER LEFT END OF DASH) ECT PWR IND ENGINE CONTROL MODULE (ON LEFT FRONT OF ENGINE COMPT, IN PROTECTIVE CASE) ENGINE CONTROLS SYSTEM ENGINE CONTROLS, NAVIGATION SYSTEM ENGINE OIL LEVEL SENSOR (ON LOWER LEFT FRONT OF ENGINE) ENGINE OIL PRESSURE SWITCH (ON LEFT FRONT OF ENGINE) FUEL FUEL IND FUEL SENDER (SUB) (UNDER RIGHT SIDE OF VEHICLE, FORWARD OF RIGHT FENDERWELL) FUEL SENDER (UNDER LEFT SIDE OF VEHICLE, FORWARD OF LEFT FENDERWELL) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/YEL WIRE GRY WIRE HEADLIGHTS SYSTEM HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START HOT W/ TAIL RELAY ENERGIZED ID (AT LEFT SIDE OF FIREWALL) IE (AT LEFT FRONT FLOOR PANEL CENTER) IG+ SI SE 3 2 IH (AT RIGHT SIDE OF FIREWALL) ILLUMINATION JUNCTION CONNECTOR 10 (BEHIND UPPER RIGHT SIDE OF DASH) JUNCTION CONNECTOR 5 (ABOVE DRIVER SIDE J/B) JUNCTION CONNECTOR 6 (FORWARD OF INSTRUMENT CLUSTER) JUNCTION CONNECTOR 7 (BEHIND UPPER RIGHT SIDE OF DASH) LBL LCD SPEEDOMETER LT GRN WIRE LT GRN/BLK WIRE M/T MALFUNCTION INDICATOR LAMP MOL MOMENTARY FUEL CONSUMPTION MOPS MPX MPX-B FUSE OIL LEVEL IND OIL PRESSURE IND ORG/ WIRE OUT SIDE TEMP GAUGE PANEL FUSE 7.5 PARKING BRAKE SWITCH (AT BASE OF PARKING BRAKE LEVER) PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) SRS-B FUSE RADIO 2 FUSE REAR LIGHTS IND RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SEAT BELT IND SECURITY IND SKID CONTROL ECU SLIP IND SNOW IND SRS IND TACHOMETER TRAC OFF IND TURN LH IND TURN RH IND VEHICLE SPEED SENSOR (COMBINATION METER) (ON LEFT REAR OF TRANSMISSION) VIO/GRN WIRE VOLT VSC IND WATER TEMP WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

AIR CONDITIONING, COOLING FANS, HEADLIGHTS, SHIFT INTERLOCK, WARNING SYSTEMS ANTI-LOCK BRAKES SYSTEM ANTI-THEFT SYSTEM ANTI-THEFT, EXTERIOR LIGHTS, HEADLIGHTS SYSTEMS BK (RIGHT FRONT FLOOR PANEL) BLK/BLU WIRE BLK/ORG WIRE BLK/RED WIRE BODY ECU IG CELLULAR TELEPHONE, EXTERIOR LIGHTS SYSTEMS CIG FUSE CIGAR- ETTE LIGHTER CRUISE CONTROL SYSTEM CRUISE CONTROL, ENGINE CONTROLS, TRANSMISSION SYSTEMS DEFOGGER, POWER WINDOW SYSTEMS DOOR DL FUSE ECU-IG FUSE ENGINE CONTROLS SYSTEM FLASHER RELAY GAUGE FUSE FROM DRIVER SIDE JUNCTION BLOCK (DIAGRAM 2 OF 3) FROM DRIVER SIDE JUNCTION BLOCK (RADIO 2 FROM DRIVER SIDE JUNCTION BLOCK (SEAT HTR FROM JUNCTION FROM PASSENGER SIDE JUNCTION BLOCK (DIAGRAM 1 OF 3) GRN WIRE GRY WIRE HEADLIGHTS SYSTEM IGN FUSE J/C 16 (ABOVE RIGHT REAR FENDERWELL) JUNCTION CONNECTOR J/C 5 (BEHIND LEFT END OF DASH) NAVIGATION SYSTEM PASSENGER SIDE JUNCTION BLOCK (BEHIND LOWER RIGHT END OF DASH) PNK WIRE POWER OUTLET POWER OUTLET (LUGGAGE) POWER OUTLET FUSE POWER OUTLET RELAY POWER TOPS SYSTEM POWER WINDOWS SYSTEMS PPL RED/BLU WIRE RR DEF RELAY SUPPLEMENTAL RESTRAINTS SYSTEM TV FUSE VIO WIRE WHT/BLK WIRE WHT/GRN WIRE

+SR P+ P- SIL D- D+ +SL 1 2 3 4 5 6 7 8 9 10 11 12 SFR+ SFR- ICR- ICR+ PR+ PR- SSR- RBE+ SSR+ 1 2 3 4 VUPR SSR+ SSR- ESR AIR BAG SQUIB (FRONT PASSENGER'S AIR BAG ASSEMBLY) AIR BAG SQUIB (STEERING WHEEL PAD) BJ (AT LEFT FRONT FLOOR PANEL) BLK WIRE BLK/ORG WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE CENTER AIR BAG SENSOR ASSEMBLY (BELOW CENTER OF DASH, ON TRANSMISSION TUNNEL) COMBINATION METER DATA LINK CONNECTOR 3 (PARTIAL) (BEHIND LOWER LEFT SIDE OF DASH) DRIVER SIDE J/B (BEHIND LOWER LEFT END OF DASH) ENGINE CONTROLS SYSTEM ESL SSL+ LBE+ SSL- ESR FUSE GRN WIRE GRY WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START IGN FUSE J/C 13 (ABOVE LEFT REAR FENDERWELL) J/C 15 (AT LEFT REAR QUARTER PANEL) J/C 5 (BEHIND LEFT END OF DASH, ABOVE DRIVER SIDE J/B) LEFT BUCKLE SWITCH (INSIDE LEFT FRONT SEAT BELT BUCKLE) LEFT CURTAIN SHIELD AIR BAG SQUIB LEFT FRONT AIR BAG SENSOR (ON LEFT SIDE OF RADIATOR SUPPORT) LEFT PRETENSIONER LEFT SIDE AIR BAG SQUIB LT GRN WIRE ORG/ WIRE OTHERS PASSENGER SIDE J/B (BEHIND LOWER RIGHT END OF DASH) PL- PL+ ICL+ ICL- SFL- SFL+ VUPL PNK WIRE PNK/BLK WIRE PNK/BLU WIRE RED WIRE RED/WHT WIRE RIGHT CURTAIN SHIELD AIR BAG SQUIB RIGHT FRONT AIR BAG SENSOR (ON RIGHT SIDE OF RADIATOR SUPPORT) RIGHT PRETENSIONER RIGHT SIDE AIR BAG SENSOR (AT BASE OF RIGHT "B" PILLAR) RIGHT SIDE AIR BAG SQUIB SEDAN W/O POWER SEAT SL- SPIRAL CABLE SRS SRS WARNING INDICATOR SRS-B FUSE SSL+ SSL- ESL TC -SR VUPL VUPR WHT WIRE WHT/BLK OR WIRE WHT/BLK WIRE WHT/GRN WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/BLU WIRE YEL/GRN WIRE YEL/RED WIRE YEL/VIO WIRE