Lexus RX I (1997-2003) computer data lines system Wiring diagrams

1 2 8 9 11 15 16 18 BATT IGSW MREL ODLP 5 22 24 25 TC SPD 7 8 9 19 20 21 23 24 30 31 DSL A/T INDICATOR SWITCH (PART OF PARK/NEUTRAL POSITION SWITCH, ON TRANSAXLE) ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/RED WIRE BLU/WHT WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM COUNTER GEAR SPEED SENSOR (ON FRONT SIDE OF ENGINE) CRUISE CONTROL ECU (BEHIND LEFT SIDE OF DASH) DATA LINK CONNECTOR 3 (UNDER LEFT SIDE OF DASH) EB (RIGHT OF SURGE TANK) EC (REAR OF SURGE TANK) EFI FUSE EFI RELAY ELECTRO- NICALLY CONTROLLED TRANSMISSION PATTERN SELECT SWITCH ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID (IN TRANSAXLE) ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) ENGINE ROOM J/B (LEFT SIDE OF ENGINE COMPT) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLU WIRE HOT AT ALL TIMES HOT IN HOT IN ON OR START IDLO IGN FUSE IH (RIGHT DASH BRACE) INSTRUMENT CLUSTER SYSTEM (O/D OFF IND) INSTRUMENT CLUSTER SYSTEM (SPEEDOMETER) INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/B 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 10 (BEHIND RIGHT SIDE OF DASH) J/C 2 (LEFT FRONT OF ENGINE COMPT, BEHIND HEADLIGHT) J/C 4 (BEHIND LEFT KICK PANEL) J/C 8 (RIGHT SIDE OF DASH) LT GRN WIRE NC- NC+ NORMAL O/D MAIN SWITCH (BELOW CENTER CONSOLE) ODMS ORG/ WIRE PNK/BLK WIRE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SLT- SLT+ NT- NT+ SNOW SNOW 3 4 STARTER FUSE STARTING/ CHARGING STOP FUSE STOPLIGHT SWITCH (ON BRAKE PEDAL BRACKET) STP +B THO THW THROTTLE POSITION SENSOR (ON THROTTLE BODY) TURBINE SPEED SENSOR (ON TRANSAXLE) VIO/WHT WIRE WHT WIRE WHT/BLK WIRE WHT/RED WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE

1 2 3 7 9 11 12 13 1 2 9 3 7 10 12 5 B+ 4 5 11 4 TX- TX+ A/C AMBIENT TEMPERATURE SENSOR (BEHIND LEFT FRONT GRILLE) A/C EVAPORATOR TEMPERATURE SENSOR (BEHIND RIGHT SIDE OF DASH) A/C ROOM TEMPERATURE SENSOR (BEHIND LEFT CENTER OF DASH) A/C SOLAR SENSOR (BEHIND UPPER LEFT SIDE OF DASH) AIR INLET CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR MIX CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) AIR VENT MODE CONTROL SERVO MOTOR (BEHIND RIGHT SIDE OF DASH) BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/WHT WIRE BLW BRN WIRE BRN/WHT WIRE BRN/YEL WIRE CDS FUSE CELLULAR PHONES SYSTEM INSTRUMENT CLUSTER SYSTEM COMB MTR INPUT COMB MTR INPUT COMB MTR INPUT SG-5 MPX- COMB MTR INPUT SRS IND HIGH BEAM IND MPX+ COMBINATION METER ECU (BEHIND COMBINATION METER) COMPUTER DATA LINES SYSTEM FUSIBLE LINK BLOCK (IN ENGINE ROOM J/B, LEFT SIDE OF ENGINE COMPT) GAUGE FUSE GRN WIRE GRN/BLK WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/RED WIRE HEATER FUSE HOT AT ALL TIMES HOT IN ON OR ACC HOT IN ON OR START IG+ TX+ GND TX- MPX- MPX+ INSTRUMENT CLUSTER SYSTEM INSTRUMENT CONTROL PANEL INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/B 5 (BEHIND UPPER LEFT SIDE OF DASH) LT GRN/BLK WIRE LT GRN/RED WIRE MULTI-DISPLAY O/D OFF IND TAM POWER HIGH BEAM COMB MTR INPUT GND COMB MTR INPUT ORG/ WIRE PNK WIRE PNK/BLU WIRE RADIO 2 FUSE RDI FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE SG-2 COMB MTR INPUT TR SG-3 COMB MTR INPUT TPI AIR AIF COMB MTR INPUT TS TPO AOD AOF TP AMH AMC SG-1 VIO WIRE VIO/WHT WIRE W/ NAV W/O NAV 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

2 6 PRE ACMG 2 LT A/C CONDENSER FAN MOTOR (IN RIGHT FRONT OF ENGINE COMPT) A/C MAGNETIC CLUTCH, LOCK SENSOR (ON A/C COMPRESSOR ASSEMBLY) BLK WIRE BLK/ORG WIRE BLK/YEL WIRE BLOWER MOTOR (BEHIND RIGHT SIDE OF DASH) BLOWER MOTOR CONTROL RELAY (NEAR BLOWER MOTOR) BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BRN WIRE COMPUTER DATA LINES SYSTEM DIODE (A/C) (BEHIND UPPER LEFT SIDE OF DASH) DOME FUSE ECU-B FUSE ENGINE CONTROL MODULE (BEHIND RIGHT SIDE OF DASH) ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPT) FAN 1 RELAY FAN 2 RELAY FAN 3 RELAY GND SI B+ GRN WIRE GRN/RED WIRE HEATER RELAY (ON INSTRUMENT PANEL J/B) HOT AT ALL TIMES INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 1 J/C 10 (BEHIND RIGHT SIDE OF DASH) J/C 2 J/C 4 (BEHIND LEFT KICK PANEL) J/C 9 LCKI LT GRN/BLK WIRE M- M+ MG CLT RELAY PNK/BLU WIRE R/B 2 (IN ENGINE ROOM J/B) RADIATOR FAN MOTOR (IN LEFT FRONT OF ENGINE COMPT) RED WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE WATER TEMPERATURE SWITCH 1 (IN RIGHT FRONT OF ENGINE COMPT) WATER TEMPERATURE SWITCH 2 (ON TOP REAR OF ENGINE) WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE YEL WIRE

AIR CONDITIONING SYSTEM HEADLIGHTS SYSTEM ANTI-THEFT SYSTEM DOOR LOCKS SYSTEM WIPER/WASHER SYSTEM ANTI-THEFT, ENGINE CONTROLS SYSTEMS BCTY HCTY DBKL KSW HR ILE BLK WIRE BLK/ORG WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BODY ECU (BEHIND LEFT SIDE OF DASH) BRN/WHT WIRE BRN/YEL WIRE BSUB IG FFGO TRLY PWR CLTE BZR CLTS COMPUTER DATA LINES SYSTEM DOOR LOCKS SYSTEM DOOR LOCKS SYSTEM (W/KEYLESS ENTRY) DOOR LOCKS, HEADLIGHTS, INTERIOR LIGHTS, POWER WINDOWS SYSTEMS DRL HEAD TAIL LSWA EXTERIOR LIGHTS SYSTEM HEADLIGHTS SYSTEM GAUGE FUSE GRN/BLK WIRE GRN/ORG WIRE GRN/RED WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE HAZ CLTB HEADLIGHTS SYSTEM HEADLIGHTS SYSTEM EXTERIOR LIGHTS SYSTEM TRANSMISSIONS SYSTEM HEADLIGHTS SYSTEM HORN HORNS SYSTEM HOT AT ALL TIMES HOT IN ACC OR ON HOT IN ON OR START INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 5 (BEHIND UPPER LEFT SIDE OF DASH) LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE P FR DOOR FUSE PNK WIRE PNK/BLK WIRE POWER TOPS SYSTEM RADIO 2 FUSE RCO RDA RSSI BDSU BDSL RDR+ RED WIRE RED/BLK WIRE RED/BLU WIRE RED/WHT WIRE RED/YEL WIRE RR WIP FUSE RWLM RWIG SH RDR- RWSW WIG RWLS RWW SNOW IND DFG STPI PKB HF TRANSMISSIONS SYSTEM ANTI-THEFT SYSTEM DEFOGGER SYSTEM W/AUTO LAMPS WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/RED WIRE WIPER/WASHER SYSTEM YEL WIRE YEL/BLK WIRE

1 2 3 4 5 6 7 8 9 10 RCL- RCL+ SLD- SLD+ LFT- LFT+ GND +B FRV- FRV+ 1 2 3 4 5 6 7 8 9 PNK WIRE BLK WIRE BLK/RED WIRE BLU WIRE BLU/BLK WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DOME FUSE ECU-IG FUSE ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) FRONT FRONT PASSENGER'S SEAT POWER SEAT CONTROL SWITCH GRN/BLK WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) J/B 3 (BEHIND UPPER CENTER OF DASH) J/C 15 (IN LEFT SIDE OF CARGO AREA) J/C 17 (UNDER DRIVER'S SEAT) J/C 18 (UNDER PASSENGER'S SEAT) J/C 3 J/C 4 JUNCTION CONNECTOR (LEFT KICK PANEL) LT GRN WIRE LT GRN/BLK WIRE LT GRN/RED WIRE MMRY SGND SSRS SLDF SLDR LUP LDWN FUP ORG/ WIRE PNK WIRE PNK/BLK WIRE POWER FUSE POWER SEAT ECU (UNDER DRIVER'S SEAT) POWER SEAT MOTOR (DRIVER'S SEAT FRONT VERTICAL CONTROL) POWER SEAT MOTOR (DRIVER'S SEAT REAR VERTICAL CONTROL) POWER SEAT MOTOR (DRIVER'S SEAT RECLINING CONTROL) POWER SEAT MOTOR (DRIVER'S SEAT SLIDE CONTROL) POWER SEAT MOTOR (FRONT PASSENGER'S SEAT RECLINING CONTROL) POWER SEAT MOTOR (FRONT PASSENGER'S SEAT SLIDE CONTROL) RCLF RCLR REAR RECLINING RED WIRE SEAT MEMORY SWITCH SET- SLIDE SSFV SSRL SSRR PVCC FDWN IG SYSB VIO WIRE VIO/WHT WIRE WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

ABS FUSE AIR CONDITIONING SYSTEM AIR CONDITIONING SYSTEM COOLING FANS SYSTEM ALT FUSE ANTI-LOCK BRAKES SYSTEM BATTERY BLK WIRE BLU WIRE COIL CONTACT COMPUTER DATA LINES SYSTEM D RR DOOR FUSE DEFOGGER SYSTEM ENGINE ROOM J/B (ON LEFT SIDE OF ENGINE COMPARTMENT) EXTERIOR LIGHTS SYSTEM, FOGLIGHT RELAY FR DEF FUSE FR FOG FUSE FROM S/ROOF FUSE (DIAGRAM 1 OF 4) FUSE FUSIBLE LINK BLOCK GENERATOR GRN WIRE GRY WIRE HEATER FUSE INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) INTERIOR LIGHTS SYSTEM NAVIGATION SYSTEM OBD FUSE ORG/ WIRE P FR DOOR FUSE P RR DOOR FUSE PANEL FUSE POWER FUSE POWER TOPS SYSTEM RDI FUSE CDS FUSE RED WIRE RR DEF FUSE S/ROOF FUSE SEAT HTR FUSE SEATS SYSTEM SEATS SYSTEM, MEMORY SYSTEM STARTER STOP FUSE TAIL FUSE TAILLIGHT RELAY TO ENGINE ROOM J/B TO ENGINE ROOM J/B (R/B 2, A/F HTR TO IGNITION SWITCH (CAVITY 2) (DIAGRAM 3 OF 4) TO POWER FUSE (DIAGRAM 1 OF 4) TO PWR OUTLET FUSE (DIAGRAM 4 OF 4) WHT WIRE YEL WIRE

BLK WIRE BLK/ORG WIRE BLK/RED WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/ORG WIRE BLU/RED WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE BRN/WHT WIRE COMBINATION METER COMPUTER DATA LINES SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (TOP FRONT OF ENGINE) GRN WIRE GRN/BLK WIRE GRN/ORG WIRE GRN/WHT WIRE HOT AT ALL TIMES HOT IN ON OR START INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) HEATER FUSE INSTRUMENT PANEL J/B (BEHIND LEFT SIDE OF DASH) STOP FUSE J/B 3 (BEHIND UPPER CENTER OF DASH) J/B 5 (BEHIND UPPER LEFT SIDE OF DASH) J/C 10 (BEHIND RIGHT SIDE OF DASH) LT GRN WIRE MALF. IND. LAMP O/D OFF IND OBD FUSE ORG/ WIRE PNK/BLK WIRE PTNK RED WIRE RED/WHT WIRE RED/YEL WIRE SIL STOPLIGHT SWITCH TAC TACH THROTTLE POSITION SENSOR (ON THROTTLE BODY) VAPOR PRESSURE SENSOR (UNDER CENTER REAR OF VEHICLE) VIO/WHT WIRE VSS VSV (ACIS 1) (ON TOP CENTER OF ENGINE) VSV (ACIS 2) (ON TOP CENTER OF ENGINE) VSV (ACM) (ON RIGHT FRONT CENTER OF ENGINE COMPT) VSV (CANISTER CLOSED VALVE) (LEFT REAR OF ENGINE COMPT) VSV (EVAP) (ON TOP CENTER OF ENGINE) VSV (PRESSURE SWITCHING VALVE) (UNDER CENTER REAR OF VEHICLE) WHT WIRE WHT/BLU WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE