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Maintenance Information: Overview Lexus SC I

Procedures 6 illustrations ~2030 words

DASH FUSE PANEL IDENTIFICATION (SC400) - 1992-93

WARNINGAlways disconnect battery ground cable before servicing high-current fuses. It is recommended that high-current fuses be replaced by a qualified technician.

Fuse & Circuit Breaker Identification

  1. 1 - 7.5 Amp - Charging System
  2. 2 - 10 Amp - Air Conditioning System, Rear Window Defogger
  3. 3 - 20 Amp - Windshield Wipers & Washers
  4. 4 - 7.5 Amp - Starting System, Cruise Control, Electronic Fuel Injection System, Instrument Panel Lights
  5. 5 - 7.5 Amp - Discharge Warning Light, Electronic Fuel Injection, SRS Air Bag System
  6. 6 - 7.5 Amp - Instrument Panel Lights, Glove Box Light
  7. 7 - 10 Amp - Outside Rear View Mirror Defogger
  8. 8 - 15 Amp (1992) 20 Amp (1993) - Turn Signal & Cornering Lights
  9. 9 - 15 Amp - Stoplights, Cruise Control Cancel Device
  10. 10 - 15 Amp - Cigarette Lighter, Theft Deterrent, Shift Lock System, SRS Air Bag, Instrument Panel Lights
  11. 11 - 7.5 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna, Power Rear View Mirrors
  12. 12 - 15 Amp - Tail, Parking, Side Marker & License Plate Lights
  13. 13 - 15 Amp - Cruise Control System, Power Steering Control System, Shift Lock System, Anti-Lock Brake System, SRS Air Bag System, Preset Steering, Traction Control System, Electronically Controlled Hydraulic-Driven, Cooling System, Passenger's Seat Control System
  14. 14 - 10 Amp - Gauges, Buzzers & Meters Warning Lights, Back-Up Lights, Headlights, Electronically Controlled Automatic Transmission, Automatic Transmission Overdrive System
  15. 15 - 15 Amp - SRS Air Bag System, Power Rear View Mirrors
  16. 16 - 15 Amp - Seat Heater
  17. 17 - 30 Amp - Preset Steering, Electronic Moon Roof, Power Windows, Theft Deterrent System
  18. 18 - 40 Amp - Starting System
  19. 19 - 30 Amp - Theft Deterrent System, Seat Control System, Fuel Opener Control System, Power Door lock System

Relay Identification

  1. 20 - Power Main Relay
  2. 21 - Taillight Relay
  3. 22 - Flasher Relay
  4. 23 - Horn Relay
  5. 24 - Seat Heater Relay

MAIN JUNCTION BLOCK IDENTIFICATION (SC400) - 1992-93

WARNINGAlways disconnect battery ground cable before servicing high-current fuses. It is recommended that high-current fuses be replaced by a qualified technician.

Fuse Identification

  1. 1 - 10 Amp - Interior, Personal, Door Courtesy, Ignition Switch, Open Door Warning & Trunk Room Lights, Electronic Moon Roof, Preset Steering, Seat Belt Warning System, Cruise Control, Air Conditioning, Inside Rear View Mirror, Door Lock & Theft Deterrent Systems, Foot Light, Power Rear View Mirror, Locking With Wireless Remote Control System, Passenger's Seat Control System
  2. 2 - 30 Amp - Electronic Fuel Injection System
  3. 3 - 25 Amp - Emergency Flashers, Horns
  4. 4 - 20 Amp - Radio, Power Antenna, Cassette Tape/Compact Disc Player
  5. 5 - 15 Amp - Telephone
  6. 6 - 7.5 Amp - Charging System
  7. 7 - 7.5 Amp - Traction Control System
  8. 8 - 15 Amp - Right Headlight (Low Beam)
  9. 9 - 15 Amp - Left Headlight (Low Beam)
  10. 10 - 15 Amp - Right Headlight (High Beam)
  11. 11 - 15 Amp - Left Headlight (High Beam)
  12. 12 - 30 Amp - Starting System

Relay Identification

  1. 13 - Starter
  2. 14 - Blank
  3. 15 - EFI Main
  4. 16 - Magnetic Clutch
  5. 17 - Ignition Main
  6. 18 - Heater
  7. 19 - Headlight
  8. 20 - Defogger
  9. 21 - Dimmer Relay
  10. 22 - Blank

Circuit Breaker Identification

  1. 23 - 60 Amp - Heater
  2. 24 - 50 Amp - Defogger Relay
  3. 25 - Blank
  4. 26 - Blank

Fusible Link Identification

  1. 27 - 60 Amp ABS No. 1
  2. 28 - 100 Amp AM1
  3. 29 - 150 Amp ALT
  4. 30 - 60 Amp MAIN
  5. 31 - 30 Amp AM1
  6. 32 - 30 Amp ABS No. 2

Scheme 1

Scheme 1: FUSE PANEL IDENTIFICATION - 1994
Scheme 1: FUSE PANEL IDENTIFICATION - 1994

Scheme 2

Scheme 2
Scheme 2
WARNINGAlways disconnect battery ground cable before servicing high-current fuses. It is recommended that high-current fuses be replaced by a qualified technician.

Fuse & Circuit Breaker Identification

  1. 1 - 7.5 Amp - Charging System
  2. 2 - 10 Amp - Air Conditioning System, Rear Window Defogger
  3. 3 - 20 Amp - Windshield Wipers & Washers
  4. 4 - 7.5 Amp - Starting System, Cruise Control, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, Instrument Panel Lights
  5. 5 - 7.5 Amp - Discharge Warning Light, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, SRS Air Bag System
  6. 6 - 7.5 Amp - Instrument Panel Lights, Glove Box Light
  7. 7 - 10 Amp - Outside Rear View Mirror Defogger
  8. 8 - 20 Amp - Turn Signal & Cornering Lights
  9. 9 - 15 Amp - Stoplights, Cruise Control Cancel Device
  10. 10 - 15 Amp - Cigarette Lighter, Theft Deterrent System, Shift Lock System, SRS Air Bag System, Instrument Panel Lights
  11. 11 - 7.5 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna, Power Rear View Mirrors
  12. 12 - 15 Amp - Tail, Parking, Side Marker & License Plate Lights
  13. 13 - 15 Amp - Cruise Control System, Power Steering Control System, Shift Lock System, Anti-Lock Brake System, SRS Air Bag System, Power Door Lock System, Preset Steering, Traction Control System, Electronically Controlled Hydraulic-Driven Cooling System, Passenger's Seat Control System
  14. 14 - 10 Amp - Gauges & Meters, Service Reminder Indicators & Warning Buzzers (Except Discharge & Open Door Warning Lights), Back-Up Lights, Headlights, Electronically Controlled Automatic Transmission System, Automatic Transmission Overdrive System, Headlight
  15. 15 - 15 Amp - SRS Air Bag System, Power Rear View Mirrors
  16. 16 - 15 Amp - Seat Heater
  17. 17 - 30 Amp - Preset Steering, Electronic Moon Roof, Power Windows, Theft Deterrent System
  18. 18 - 40 Amp - Starting System
  19. 19 - 30 Amp - Theft Deterrent System, Seat Control System, Fuel Opener Control System, Power Door lock System
  20. 20 - 10 Amp - Interior Light, Personal Light, Door Courtesy Lights, Ignition Switch Light, Open Door Warning Light, Trunk Room Light, Electronic Moonroof System, Preset Steering System, Seat Belt Reminder System, Cruise Control System, Air Conditioning System, Inside Rear View Mirror, Door Lock & Theft Deterrent System, Foot Light, Power Rear View Mirror, Locking With Wireless Remote Control System, Passenger's Seat Control System
  21. 21 - 30 Amp - Multiport Fuel Injection System/Sequential Multiport Fuel Injection System
  22. 22 - 25 Amp - Emergency Flashers, Horns
  23. 23 - 20 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna
  24. 24 - 15 Amp - Telephone
  25. 25 - 7.5 Amp - Charging System
  26. 26 - 7.5 Amp - Traction Control System
  27. 27 - 15 Amp - Right Hand Headlight (Low Beam)
  28. 28 - 15 Amp - Left Hand Headlight (Low Beam)
  29. 29 - 7.5 Amp - Daytime Running Light System (Canada Only)
  30. 30 - 15 Amp - Right Hand Headlight (High Beam)
  31. 31 - 15 Amp - Left Hand Headlight (High Beam)
  32. 32 - 30 Amp - Starting System

Scheme 3

Scheme 3: FUSE PANEL IDENTIFICATION - 1995
Scheme 3: FUSE PANEL IDENTIFICATION - 1995

Scheme 4

Scheme 4
Scheme 4
WARNINGAlways disconnect battery ground cable before servicing high-current fuses. It is recommended that high-current fuses be replaced by a qualified technician.

Fuse & Circuit Breaker Identification

  1. 1 - 7.5 Amp - Charging System
  2. 2 - 10 Amp - Air Conditioning System, Rear Window Defogger
  3. 3 - 20 Amp - Windshield Wipers & Washers
  4. 4 - 7.5 Amp - Starting System, Cruise Control, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, Instrument Panel Lights
  5. 5 - 7.5 Amp - Discharge Warning Light, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, SRS Air Bag System
  6. 6 - 7.5 Amp - Instrument Panel Lights, Glove Box Light
  7. 7 - 10 Amp - Outside Rear View Mirror Defogger
  8. 8 - 20 Amp - Turn Signal & Cornering Lights
  9. 9 - 15 Amp - Stoplights, Cruise Control Cancel Device
  10. 10 - 15 Amp - Cigarette Lighter, Theft Deterrent System, Shift Lock System, SRS Air Bag System, Instrument Panel Lights
  11. 11 - 7.5 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna, Power Rear View Mirrors
  12. 12 - 15 Amp - Tail, Parking, Side Marker & License Plate Lights
  13. 13 - 15 Amp - Cruise Control System, Power Steering Control System, Shift Lock System, Anti-Lock Brake System, SRS Air Bag System, Power Door Lock System, Preset Steering, Traction Control System, Electronically Controlled Hydraulic-Driven Cooling System, Passenger's Seat Control System
  14. 14 - 10 Amp - Gauges & Meters, Service Reminder Indicators & Warning Buzzers (Except Discharge & Open Door Warning Lights), Back-Up Lights, Headlights, Electronically Controlled Automatic Transmission System, Automatic Transmission Overdrive System, Headlight
  15. 15 - 15 Amp - SRS Air Bag System, Power Rear View Mirrors
  16. 16 - 15 Amp - Fog Lights
  17. 17 - 15 Amp - Seat Heater
  18. 18 - 30 Amp - Preset Steering, Electronic Moon Roof, Power Windows, Theft Deterrent System
  19. 19 - 40 Amp - Starting System
  20. 20 - 30 Amp - Theft Deterrent System, Seat Control System, Fuel Opener Control System, Power Door lock System
  21. 21 - 10 Amp - Interior Light, Personal Light, Door Courtesy Lights, Ignition Switch Light, Open Door Warning Light, Trunk Room Light, Electronic Moonroof System, Preset Steering System, Seat Belt Reminder System, Cruise Control System, Air Conditioning System, Inside Rear View Mirror, Door Lock & Theft Deterrent System, Foot Light, Power Rear View Mirror, Locking With Wireless Remote Control System, Passenger's Seat Control System
  22. 22 - 30 Amp - Multiport Fuel Injection System/Sequential Multiport Fuel Injection System
  23. 23 - 25 Amp - Emergency Flashers, Horns
  24. 24 - 20 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna
  25. 25 - 15 Amp - Telephone
  26. 26 - 7.5 Amp - Charging System
  27. 27 - 7.5 Amp - Traction Control System
  28. 28 - 15 Amp - Right Hand Headlight (Low Beam)
  29. 29 - 15 Amp - Left Hand Headlight (Low Beam)
  30. 30 - 7.5 Amp - Daytime Running Light System (Canada Only)
  31. 31 - 15 Amp - Right Hand Headlight (High Beam)
  32. 32 - 15 Amp - Left Hand Headlight (High Beam)
  33. 33 - 30 Amp - Starting System

Scheme 5

Scheme 5: FUSE PANEL IDENTIFICATION - 1996
Scheme 5: FUSE PANEL IDENTIFICATION - 1996

Scheme 6

Scheme 6
Scheme 6
WARNINGAlways disconnect battery ground cable before servicing high-current fuses. It is recommended that high-current fuses be replaced by a qualified technician.

Fuse & Circuit Breaker Identification

  1. 1 - 7.5 Amp - Charging System
  2. 2 - 10 Amp - Air Conditioning System, Rear Window Defogger
  3. 3 - 20 Amp - Windshield Wipers & Washers
  4. 4 - 7.5 Amp - Starting System, Cruise Control, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, Instrument Panel Lights
  5. 5 - 7.5 Amp - Discharge Warning Light, Multiport Fuel Injection System/Sequential Multiport Fuel Injection System, SRS Air Bag System
  6. 6 - 7.5 Amp - Instrument Panel Lights, Glove Box Light
  7. 7 - 10 Amp - Outside Rear View Mirror Defogger
  8. 8 - 20 Amp - Turn Signal & Cornering Lights
  9. 9 - 15 Amp - Stoplights, Cruise Control Cancel Device
  10. 10 - 15 Amp - Cigarette Lighter, Theft Deterrent System, Shift Lock System, SRS Air Bag System, Instrument Panel Lights
  11. 11 - 7.5 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna, Power Rear View Mirrors
  12. 12 - 15 Amp - Tail, Parking, Side Marker & License Plate Lights
  13. 13 - 15 Amp - Cruise Control System, Power Steering Control System, Shift Lock System, Anti-Lock Brake System, SRS Air Bag System, Power Door Lock System, Preset Steering, Traction Control System, Electronically Controlled Hydraulic-Driven Cooling System, Passenger's Seat Control System
  14. 14 - 10 Amp - Gauges & Meters, Service Reminder Indicators & Warning Buzzers (Except Discharge & Open Door Warning Lights), Back-Up Lights, Headlights, Electronically Controlled Automatic Transmission System, Automatic Transmission Overdrive System, Headlight
  15. 15 - 15 Amp - SRS Air Bag System, Power Rear View Mirrors
  16. 16 - 7.5 Amp - On Board Diagnosis System
  17. 17 - 15 Amp - Fog Lights
  18. 18 - 15 Amp - Seat Heater
  19. 19 - 30 Amp - Preset Steering, Electronic Moon Roof, Power Windows, Theft Deterrent System
  20. 20 - 40 Amp - Starting System
  21. 21 - 30 Amp - Theft Deterrent System, Seat Control System, Fuel Opener Control System, Power Door lock System
  22. 22 - 10 Amp - Interior Light, Personal Light, Door Courtesy Lights, Ignition Switch Light, Open Door Warning Light, Trunk Room Light, Electronic Moonroof System, Preset Steering System, Seat Belt Reminder System, Cruise Control System, Air Conditioning System, Inside Rear View Mirror, Door Lock & Theft Deterrent System, Foot Light, Power Rear View Mirror, Locking With Wireless Remote Control System, Passenger's Seat Control System
  23. 23 - 30 Amp - Multiport Fuel Injection System/Sequential Multiport Fuel Injection System
  24. 24 - 25 Amp - Emergency Flashers, Horns
  25. 25 - 20 Amp - Radio, Cassette Tape Player, Compact Disc Player, Power Antenna
  26. 26 - 15 Amp - Telephone
  27. 27 - 7.5 Amp - Charging System
  28. 28 - 7.5 Amp - Traction Control System
  29. 29 - 15 Amp - Right Hand Headlight (Low Beam)
  30. 30 - 15 Amp - Left Hand Headlight (Low Beam)
  31. 31 - 7.5 Amp - Daytime Running Light System (Canada Only)
  32. 32 - 15 Amp - Right Hand Headlight (High Beam)
  33. 33 - 15 Amp - Left Hand Headlight (High Beam)
  34. 34 - 30 Amp - Starting System

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