Lexus LS400 (2000 year). Manual — part 50
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BODY ELECTRICAL
TROUBLESHOOTING
BE–15
1878
”Front Vertical Operation” does not operate.
1. Power Seat Switch (D)
2. Power Seat Switch (P)
3. Wire Harness
4. Front Vertical Motor (D, P)
”Rear Vertical Operation” does not operate.
1. Power Seat Switch (D)
2. Wire Harness
3. Rear Vertical Motor (D, P)
”Reclining Operation” does not operate.
1. Power Seat Switch (D)
2. Power Seat Switch (P)
4. Wire Harness
4. Reclining Motor (D, P)
”Lumbar Support Operation” does not operate.
1. Power Seat Switch (D, P)
2. Wire Harness
3. Lumbar Support Motor (D, P)
(D): Driver’s Seat
(P): Passenger’s Seat
w/ Memory System:
POWER MIRROR CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
Symptom
Suspect Area
See page
Both right and left mirror does not operate.
1. RADIO NO.2 Fuse (Instrument Panel J/B)
2. Mirror Switch
3. Tilt & Telescopic ECU
4. Multiplex Communication Circuit
5. Wire Harness
Only one side of interior does not operate.
1. Driver Door ECU (Left Side Mirror)
2. Front Passenger Door ECU (Right Side Mirror)
3. Mirror Motor
4. Wire Harness
The mirror does not return to the memorized position.
1. Driving Position Memory
(Position is not set)
2. Driving Position Switch
3. Driver Door ECU
4. Multiplex Communication Circuit
5. Wire Harness
The memorized position is moved.
1. Driving Position Memory
(Position is not set)
2. Wire Harness
w/o Memory System:
POWER MIRROR CONTROL SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
Symptom
Suspect Area
See page
Mirror does not operate.
1. RADIO NO.2 Fuse (Instrument Panel J/B)
2. Mirror Switch
3. Mirror Motor
4. Wire Harness
Mirror operates abnormally.
1. Mirror Switch
2. Mirror Motor
3. Wire Harness
BE–16
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BODY ELECTRICAL
TROUBLESHOOTING
1879
POWER SHOULDER BELT ANCHORAGE SYSTEM
This system uses the multiplex communication system, so check diagnosis system of the multiplex commu-
nication system before you proceed with troubleshooting.
Symptom
Suspect Area
See page
Driver’s belt anchor can not be operated manually.
1. Shoulder Belt Adjust Switch (Driver’s)
2. Driver Door ECU
3. Multiplex Communication Circuit
4. Tilt and Telescopic ECU
5. Height Adjustable Anchor Motor
6. Wire Harness
The anchor does not return to the memorized position.
1. Driving Position Memory and Return Switch
2. Driver Door ECU
3. Multiplex Communication Circuit
4. Tilt and Telescopic ECU
5. Wire Harness
The memorized position is moved.
1. Height Adjustable Anchor Sensor
Passenger’s belt anchor can not be operated manually.
1. Shoulder Belt Adjust Switch (Passenger’s)
2. Shoulder Belt Anchor Relay
3. Wire Harness
4. Height Adjustable Anchor Motor
ELECTRO CHROMIC MIRROR SYSTEM
Symptom
Suspect Area
See page
Electro Chromic Inner Mirror does not operate.
1. ECU–IG Fuse (Instrument Panel J/B)
2. Elector Chromic Inner Mirror
3. Wire Harness
Electro Chromic Outer Mirror does not operate.
1. ECU–IG Fuse (Instrument Panel J/B)
2. Electro Chromic Outer Mirror
3. Elector Chromic Inner Mirror
4. Wire Harness
SEAT HEATER SYSTEM
Symptom
Suspect Area
See page
Seat heaters do not operate.
(Driver’s and Passenger’s)
1. FR S/HTR Fuse (Engine Room J/B)
2. Engine Main Relay (Engine Room J/B)
3. Seat Heater Switch
4. Wire Harness
5. Seat Heater
Driver’s seat heater does not operate.
1. Seat Heater Switch
2. Wire Harness
Passenger’s seat heater does not operate.
1. Seat Heater Switch
2. Wire Harness
Seat heater temperature is too hot.
1. Seat Heater
FUEL LID OPENER SYSTEM
Symptom
Suspect Area
See page
Fuel lid opener system does not operate.
1. FUEL OPN Fuse (Instrument Panel J/B)
2. Fuel Lid Opener Switch
3. Fuel Lid Opener Solenoid
4. Wire Harness
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BODY ELECTRICAL
TROUBLESHOOTING
BE–17
1880
GARAGE DOOR OPENER SYSTEM
Symptom
Suspect Area
See page
The equipment of which code has been registered does not oper-
ate.
1. Garage Door Opener
2. Wire Harness
3. *
LED does not light up. (Even though either switch is pressed.)
1. Garage Door Opener
2. Wire Harness
LED does not light up. (Only one switch is pressed.)
1. Garage Door Opener
* As the GARAGE DOOR OPENER on the vehicle side seems to be normal, check the OPENER on the
equipment side, of which code has been registered.
HORN SYSTEM
Symptom
Suspect Area
See page
Horn system does not operate.
1. HORN Fuse (Engine Room J/B)
2. Horn Relay (Engine Room J/B)
3. Horn Switch
4. Horn
5. Wire Harness
BE–257
BE–257
BE–257
Horns blow all the time.
1. Horn Relay (Engine Room J/B)
2. Horn Switch
3. Wire Harness
BE–257
BE–257
One horn operates but other horn does not operate.
1. Horn
2. Wire Harness
BE–257
Horns operate abnormally.
1. Horn Relay (Engine Room J/B)
2. Horn
3. Wire Harness
BE–257
BE–257
BE0B9–01
I03227
Instrument Panel Junction Block
RR CIG Fuse
Power Outlet
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BODY ELECTRICAL
POWER OUTLET
BE–31
1894
POWER OUTLET
LOCATION
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