TROUBLESHOOTING - Shoarmateam.nl
Contents
1. 1 DOME Fuse Engine Room J B All the lights do not come ON 2 DOME Fuse Engine Room J B 3 Body ECU 1 Driver s Door Courtesy Switch 2 Driver Door ECU The light does not come ON when the driver s door is opened 3 Multiplex Communication Circuit 4 Body ECU 5 Wire Harness 1 Passenger s Door Courtesy Switch 2 Front Passenger Door ECU 3 Multiplex Communication Circuit 4 Body ECU 5 Wire Harness The light does not come ON when the passenger s door is opened 1 Rear Right Door Courtesy Switch The light does not come on when the rear right door is opened 2 Body ECU 3 Wire Harness 1 Rear Left Door Courtesy Switch The light does not come on when the rear left door is opened 2 Body ECU 3 Wire Harness Only one of the bulbs comes ON 1 Bulb P 1 Courtesy Switch 2 Driver Door ECU 3 Front Passenger Door ECU 4 Multiplex Communication Circuit 5 Body ECU 6 Wire Harness The illumination does not fade out when all the doors are closed 2000 LEXUS LS400 RM717U Author Date 1871 BODY ELECTRICAL The illumination does not fade out immediately when the ignition switch is turned to ACC or ON within 15 seconds after all the doors are closed The illumination does not fade out immediately when all the doors are locked within 15 seconds after they are closed Interior light does not light up in front personal light Front personal light does not light up Rear perso2. RM717U Author Date 1877 BE 15 BODY ELECTRICAL TROUBLESHOOTING Power Seat Switch D Power Seat Switch P Wire Harness Front Vertical Motor D P Front Vertical Operation does not operate Power Seat Switch D Rear Vertical Operation does not operate Wire Harness Rear Vertical Motor D P Power Seat Switch D Power Seat Switch P Wire Harness Reclining Motor D P Reclining Operation does not operate Power Seat Switch D P Lumbar Support Operation does not operate Wire Harness 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 RADIO NO 2 Fuse Instrument Panel J B Mirror Switch Both right and left mirror does not operate Tilt amp Telescopic ECU Multiplex Communication Circuit Wire Harness Driver Door ECU Left Side Mirror Front Passenger Door ECU Right Side Mirror Mirror Motor Wire Harness Only one side of interior does not operate 1 Driving Position Memory Position is not set 2 Driving Position Switch 3 Driver Door ECU 4 Multiplex Communication Circuit 5 Wire Harness The mirror does not return to the memorized position 1 Driving Position Memory The memorized positi
3. Wire Harness H LP Fuse LH LWR Engine Room No 1 R B H LP Fuse RH LWR Engine Room No 1 R B Headlight Dimmer Relay Engine Room J B LO Beam does not light Headlight Dimmer Switch Headlight Main Bulb Light Control ECU Wire Harness H LP Fuse LH UPR Engine Room J B H LP Fuse RH UPR Engine Room J B Hl Beam does not light Headlight Dimmer Relay Engine Room J B Only one headlight comes on Headlight main Only one headlight comes on Headlight sub Headlight main and sub Headlight Dimmer Switch Light Control ECU Wire Harness Headlight Main or Sub Bulb Light Control ECU Wire Harness H LP Fuse LH UPR Engine Room J B H LP Fuse RH UPR Engine Room J B Flash does not light Headlight Dimmer Relay Engine Room J B Headlight main and sub Headlight Dimmer Switch Light Control ECU Wire Harness Hl Beam does not light Headlight main or sub Headlight Main or Sub Bulb Light Control ECU Wire Harness Flash does not light Headlight main or sub Headlight Control Relay Engine Room J B Headlight Dimmer Relay Engine Room J B Headlight does not come on Light Control Switch Headlight main and sub Body ECU Light Control ECU Wire Harness 2000 LEXUS LS400 RM717U Author Date 1867 BE 5 BODY ELECTRICAL TROUBLESHOOTING 1 Headlight Main or Sub 2 Li
4. LH Headlight Sub Bulb a Light Control ECU BE 38 Wire Harness i Headlight Dimmer Switch BE 38 LO B d t light All T e iii Light Control ECU BE 38 9 Wire Harness i Headlight Main Bulb LO B d t light O de e enna tema Light Control ECU BE 38 9 Wire Harness HI Beam does not light All Headlight Dimmer Switch BE 38 Headlight main Light Control ECU BE 38 9 Wire Harness 2000 LEXUS LS400 RM717U Author Date 1868 BE 6 BODY ELECTRICAL TROUBLESHOOTING Hl Beam does not light One side Headlight main Flash does not light Headlight main Headlight does not come on Headlight main Headlight does not come on Headlight sub Headlight does not come on with light control switch in HEAD Headlight main Headlight does not go out with light control switch in OFF Headlight main Headlight is flicker Headlight is dark Taillight does not come on with light control switch in TAIL Headlight main Taillight does not go out with light control switch in OFF Headlight main Headlight do not come on with engine running and light control switch in OFF Headlight main HID Type 2000 LEXUS LS400 RM717U ON oOakrWD Headlight Main Bulb Light Control ECU Wire Harness Headlight Dimmer Switch Light Control ECU Wire Harness Headlight Control Relay Engine Room J B Daytime Running Light Relay Hea
5. 2 BE 10 BODY ELECTRICAL TROUBLESHOOTING 1 AM1 H Fuse 2 WIPER Fuse 3 Ignition Switch BE 33 Headlight Cleaner System does not operate 4 Headlight Cleaner Switch BE 79 All 5 Headlight Cleaner Relay BE 79 6 Headlight Cleaner Motor BE 79 7 Headlight Cleaner Nozzle and Hose 8 Wire Harness Washer fluid does not spray Headlight Cleaner Nozzle and Hose WIPER AND WASHER SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting WIPER Fuse Instrument Panel J B Wiper Switch Wiper and washers do not operate Wiper Motor Body ECU Wire Harness Wiper Switch Wipers do not operate in LO HI or MIST Wiper Motor Wire Harness Wiper Switch Wiper Motor Body ECU Wire Harness Washer Switch BE 82 Washer motor does not operate Washer Motor BE 82 Wire Harness Washer Motor BE 82 Wipers do not operate when washer switch in ON Body ECU DI 661 Wire Harness Ed Washer fluid does not operate 1 Washer Hose and Nozzle e When wiper switch is at HI position the wiper blade is in 1 Wiper Motor BE 82 contact with the body 2 Wire harness e When the wiper switch is OFF the wiper blade does not 3 Body ECU DI 661 retract or the retract position wrong Inspect wiper arm and blade set position COMBINATION METER MPX B Fuse Bulb SRS warning light does not l
6. BE 3 BODY ELECTRICAL TROUBLESHOOTING TROUBLESHOOTING PROBLEM SYMPTOMS TABLE BEODD 04 The table below will be useful for you in troubleshooting these electrical problems The most likely causes of the malfunction are shown in the order of their probability Inspect each part in the order shown and re place the part when it is found to be faulty POWER OUTLET 1 Battery Electric power source cannot be taken out of the power outlet 2 RR CIG Fuse Instrument panel J B 3 Wire Harness IGNITION SWITCH 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 Igniti itch i pects h iti 1 Ignition switch BE 33 gnition switch is not set to each position gt Power source oireili BEA KEY UNLOCK WARNING SWITCH This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting Key Unlock Warning Switch Door Courtesy Switch Driver Door ECU Multiplex Communication Circuit Body ECU Wire Harness Key unlock warning system does not operate The buzzer does not sound when the driver s door is opened with the ignition OFF and key inserted Ignition Switch Key unlock warning system does not operate RADIO No 2 Fuse Instrument Panel J B The buzzer sounds when the ignition key is A
7. CAL THEFT DETERRENT SYSTEM BE 13 TROUBLESHOOTING This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting The system cannot be set The system cannot be canceled when the ignition switch is turned to ACC with key The system cannot be canceled when the luggage compartment door is unlocked with key The system does not operate when the engine hood is opened The system does not operate when the door is opened or un locked without using a key or transmitter The system does not operate when the ignition switch is turned to ACC without using a key or transmitter Some of the does not operate Headlight does not light up Some of the system does not operate Taillight does not light up Some of the system does not operate Theft deterrent horn or horn does not sound 2000 LEXUS LS400 RM717U 2 3 4 5 6 7 8 Indicator Light Key Unlock Warning Switch Door Unlock Detection Switch Engine Hood Courtesy Switch Luggage Room Door Courtesy Switch Wire Harness Body ECU Driver Door ECU Multiplex Communication Circuit 0 Transmitter Key Unlock Warning Switch Ignition Switch Body ECU RADIO NO 2 Fuse Instrument panel J B Wire Harness Luggage Room Door Courtesy Switch Body ECU Wire Harness Engine Hood Courtesy Switch Body ECU Wire Harness Door Co
8. CC or ON GAUGE Fuse Instrument Panel J B Wire Harness HEADLIGHT AND TAILLIGHT SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting HINT To inspect the bulb and light control ECU replace them with the ones working normally and judge whether they work normally or not AUTOMATIC LIGHT CONTROL SYSTEM ECU IG Fuse Instrument Panel J B DOME Fuse Engine Room J B Automatic Light Control Sensor Light Control Switch Door Courtesy Switch Body ECU Driver Door ECU Wire Harness Automatic light control system does not operate 2 3 4 5 6 7 8 2000 LEXUS LS400 RM717U Author Date 1866 BE 4 BODY ELECTRICAL TROUBLESHOOTING AUTO TURN OFF SYSTEM 1 Drivers Door Courtesy Switch Auto turn off system does not operate when the driver s door is 2 Driver Door ECU opened 3 Multiplex Communication Circuit 4 Body ECU Headii d taillight does not come o l ri A r S eadlig ta Iili s 2 Wire Harnes Headligh d taillight stays o l ri ee rness eadlig ta iig y s 2 Wire Ha USA H LP Fuse LH LWR Engine Room No 1 R B H LP Fuse RH LWR Engine Room No 1 R B Headlight Main Bulb Light Control ECU Wire Harness H LP Fuse LH UPR Engine Room J B H LP Fuse RH UPR Engine Room J B Headlight Sub Bulb Light Control ECU
9. dlight Dimmer Switch Light Control Switch Body ECU Wire Harness Light Control ECU Headlight Main Bulb AN Oak UON Headlight Dimmer Relay Engine Room J B Daytime Running Light Relay Daytime Running Light No 4 Relay Light Control ECU Wire Harness Light Control Switch Body ECU Light Control ECU Wire Harness Headlight Control Relay Engine Room J B Light Control ECU Wire Harness Headlight Main or sub Bulb Headlight Dimmer Relay Engine Room J B Light Control ECU Wire Harness Headlight Main or Sub Bulb Light control ECU Wire Harness Taillight Control Relay Instrument Panel J B Light Control Switch Wire Harness Taillight Control Relay Instrument Panel J B Light Control Switch Wire Harness ECU B Fuse Engine Room J B GAUGE Fuse Instrument Panel J B DRL Fuse Engine Room R B No 1 Daytime Running Light Relay Daytime Running Light No 3 and No 4 Relay Body ECU Generator L Terminal Parking Brake Switch 9 Brake Fluid Level Warning Switch 10 Light Control ECU 11 Wire Harness Author Date 1869 BE 7 BODY ELECTRICAL TROUBLESHOOTING HEADLIGHT BEAM LEVEL CONTROL SYSTEM PWR IG Fuse Engine Room J B Beam axis is not controlled It is not initialized Headlight Beam Level Control Actuator BE 52 Headlight Beam Level Control System does not operate Headlight Beam Level Contr
10. e BE 154 e Some functions of wireless door lock control system do not operate HINT e Troubleshooting of the wireless door lock control system is based on the premise that the door lock control system is operating normally Accordingly before troubleshooting the wireless door lock control system first make certain that the door lock control system is operating normally e Ifthe trouble still reappears even though there are no abnormalities in any of the other circuits then check and replace the Wireless Door Lock Control Receiver as the last step 1 Wireless Door Lock Control Receiver BE 161 All functions of wireless door lock control system do not operate 2 Wire Harness 1 Wireless Door Lock Buzzer Wireless door lock operates but the buzzer does not sound 2 Wireless Door Lock Control Receiver 3 Wire Harness POWER SEAT CONTROL SYSTEM 1 Wire Harness 2 Power Seat Switch D 3 Power Seat Switch P Power seat does not operate Door lock does not operate 1 Wire Harness 2 Power Seat Switch D 3 Power Seat Switch P Power seat does not operate Door lock is normal 1 Power Seat Switch D BE 172 Driver s seat does not operate 2 Wire Harness P td i 1 Power Seat Switch P BE 172 assenger s seat does not operate 5 Wire Harmess 1 Power Seat Switch D 2 Power Seat Switch P 3 Wire Harness 4 Slide Motor D P Slide operation does not operate 2000 LEXUS LS400
11. ght Control ECU 3 Wire Harness 1 Headlight Main or Sub Bulb Headlioht is flick 2 Headlight Dimmer Relay Engine Room J B BE 38 POIA 1S MES 3 Light Control ECU BE 38 4 Wire Harness 1 Headlight Main or Sub Bulb Headlight is dark 2 Light control ECU BE 38 3 Wire Harness Onl taillight 1 Taillight Bulb nly one taillight comes on 2 Wire Harness Headlight does not come on Headlight main or sub 1 TAIL Fuse Instrument Panel J B 2 GAUGE Fuse Instrument Panel J B 3 Taillight Control Relay Instrument Panel J B 4 Light Failure Sensor 5 Light Control Switch 6 Body ECU 7 Wire Harness Taillight does not come on 1 Light Control Switch BE 38 Headlight does not light 2 Wire Harness 1 Light Failure Sensor BE 76 Rear combination light does not come on 2 Wire Harness 3 Bulb HID Type CANADA H LP Fuse LH Engine Room R B No 1 Only one headlight comes on H LP Fuse RH Engine Room R B No 1 Headlight main Headlight Main Bulb Light Control ECU BE 38 Wire Harness H LP Fuse LH UPR Engine Room J B H LP Fuse RH UPR Engine Room J B Only one headlight comes on Daytime Running Light No 3 Relay BE 38 Headlight sub RH Headlight Sub Bulb Light Control ECU BE 38 Wire Harness Taillight does not come on Headlight is normal H LP Fuse LH UPR Engine Room J B H LP Fuse RH UPR Engine Room J B Only one headlight comes on Headlight sub
12. gine Room J B All defogger systems do not operate 3 Defogger Switch BE 116 4 Defogger Relay Engine Room J B BE 116 5 Wire Harness R indow def d t t 1 Defogger Wire BE 116 ear window defogger does not operate 2 Wire Harness 1 MIR HTR Fuse Engine Room J B Mirror defogger does not operate 2 Mirror Defogger BE 116 3 Wire Harness POWER WINDOW CONTROL SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting All the power windows do not operate 1 Power Window Master Switch BE 126 Power Door Lock System is normal 2 Wire Harness 1 Power Window Master Switch 2 Power WIndow Switch 3 Power Window Motor 4 Wire Harness Window lock function does not operate 1 Power Window Master Switch BE 126 2000 LEXUS LS400 RM717U Only the driver s window does not operate Author Date 1874 BE 12 BODY ELECTRICAL TROUBLESHOOTING Window does not operate with power window master switch A i TROUBLESHOOTING NO 1 BE 120 Manual or Automatic operation can be performed Remove control of all windows Except driver s does not func tions with master switch TROUBLESHOOTING NO 2 Window operate normally with each of master switch The Key related power window operations does not operate with driver side door key cylinder TROUBLESHOOTING NO 3 Master switch operation is normal P i ith mu
13. ight up Meter Circuit Plate BE 86 Wire Harness Airbag Sensor Assembly DI 574 Wipers do not operate in INT Bulb by at Meter Circuit Plate BE 86 Hi beam indicator light does not light up Wire Harness Headlight System BE 36 Bulb rop Meter Circuit Plate BE 86 Turn indicator light does not light up ie Harness Turn Signal and Hazard Warning System BE 58 2000 LEXUS LS400 RM717U Author Date 1873 BE 11 BODY ELECTRICAL TROUBLESHOOTING GAUGE Fuse Bulb ABS warning light does not light up Meter Circuit Plate Wire Harness ABS TRAC and VSC ECU GAUGE Fuse Bulb TRAC warning light does not light up Meter Circuit Plate Wire Harness ABS TRAC and VSC ECU Bulb Meter Circuit Plate Wire Harness Suspension ECU AIRSUS warning light does not light up Bulb Meter Circuit Plate Wire Harness ECM Bulb Fuel level warning switch Meter Circuit Plate Wire Harness Malfunction indicator light does not light up Fuel level warning light does not light up ELECTRIC TENSION REDUCER SYSTEM Symptom Suspect Area Tension Reducer does not operate 1 PWR IG Fuse Instrument Panel J B Driver s and Passenger s 2 Wire Harness 1 Buckle Switch BE 113 Tension Reducer does not operate BE 113 Only one side 2 Tension Reducer Solenoid y 3 Wire Harness DEFOGGER SYSTEM 1 HTR Fuse Instrument Panel J B 2 DEF H Fuse En
14. lti function t itter Owr window does not operate with multi t ng ion transmi TROUBLESHOOTING NO 4 BE 120 Windows operate normally with master switch Wi ith i dered during th era oai moves down without being ordered during the up op TROUBLESHOOTING NO 5 BE 120 POWER DOOR LOCK CONTROL SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting 1 Door Lock Control Switch 2 Driver Door ECU 3 Front Passenger Door ECU 4 Multiplex Communication Circuit 5 Body ECU 6 Wire Harness All the doors cannot be locked or unlocked 1 Driver Door ECU Only driver s side door lock control does not operate 2 Driver s Door Lock Motor 3 Wire Harness 1 Driver Door ECU 2 Multiplex Communication Circuit Other doors than the driver s side door do not operate 3 Body ECU 4 Wire Harness 5 Door Lock Motor 1 Door Key Lock and Unlock Switch BE 139 Door key related function does not operate 2 Wire Harness 1 Key Unlock Warning Switch Key confinement prevention function does not operate 2 Wire Harness 3 Body ECU 1 Luggage Compartment Door Opener Switch 2 Luggage Compartment Door Key Lock and Unlock Switch 3 Luggage Compartment Door Opener Motor 4 Wire Harness 5 Body ECU Luggage compartment door opener function does not operate 2000 LEXUS LS400 RM717U Author Date 1875 BODY ELECTRI
15. m does not operate Horn Switch Horn Wire Harness The equipment of which code has been registered does not oper Horn Relay Engine Room J B Horns blow all the time Horn Switch Wire Harness Horn Wire Harness One horn operates but other horn does not operate Horn Relay Engine Room J B Horns operate abnormally Horn Wire Harness 2000 LEXUS LS400 RM717U Author Date 1880
16. nal light does not light up Vanity light does not light up Luggage compartment light does not light up Courtesy light does not light up STOP LIGHT SYSTEM BE 9 TROUBLESHOOTING Ignition Switch RADIO NO 2 Fuse Instrument Panel J B GAUGE Fuse Instrument Panel J B Body ECU Wire Harness Door Unlock Detection Switch Driver Door ECU Front Passenger Door ECU Multiplex Communication Circuit Body ECU Wire Harness Bulb Front Personal Light Wire Harness Bulb Front Personal Light Wire Harness Bulb Rear Personal Light Wire Harness Bulb Vanity Light Wire Harness Bulb Luggage Compartment Door Courtesy Switch Wire Harness Bulb Door Courtesy Switch Wire Harness Stop light does not light up 1 STOP Fuse Instrument Panel J B 2 Stop Light Switch BE 76 3 Light Failure Sensor BE 76 4 Wire Harness i 1 Stop Light Switch BE 76 Stop light always lights up 2 Wire Harness Oniy one ight always lights up 1 Bulb Only one light does not light up 2 Wire Harness HEADLIGHT CLEANER SYSTEM 1 Light control switch BE 38 2 Wire Harness Headlight Cleaner System does not operate Using light control switch Headlight Cleaner System does not operate 1 When operating Running Light System 2000 LEXUS LS400 RM717U Daytime Running Light Relay Main BE 38 2 Wire Harness Author Date 187
17. ol ECU BE 52 Wire Harness Side Headlight Beam Level Control ECU Power Source Circuit Beam axis is not controlled It is initialized Height Control Sensor Headlight Beam Level Control System does not operate Suspension ECU Headlight Beam Level Control ECU Wire Harness Side Height Control Sensor Suspension ECU Headlights Wire Harness Side Controlled angle of head light is nnusual The angle is controlled ABS System Beam axis position is not stable during driving Headlights Wire Harness Side FOG LIGHT SYSTEM 1 FOG Fuse Instrument Panel J B Fog light does not light up with light control SW HEAD 2 Fog Light Relay Instrument Panel J B Headlight is normal 3 Fog Light Switch 4 Wire Harness Fog light does not light up with light control SW HEAD 1 1 Other Parts Headlight does not light 2 Wire Harness Only one light does not light ors Ceara MOJU 2 Wire Harness 1 Inspect Headlight System TURN SIGNAL AND HAZARD WARNING SYSTEM 1 Hazard Warning Switch 2 Turn Signal Switch 3 Turn Signal Flasher 4 Wire Harness Hazard and Turn do not light up 1 Bulb The flashing frequency is abnormal 2 Turn Signal Switch BE 38 3 Wire Harness Hazard warning light does not light up 1 HAZ Fuse Engine Room J B Turn is normal 2 Wire Harness H d ing light d t light up i directi 1 Hazard Warning Switch BE 59 azard warning light does not light up in one di
18. on is moved 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 RADIO NO 2 Fuse Instrument Panel J B Mirror Switch DI 727 Mirror does not operate Mirror Motor DI 727 Wire Harness Mirror Switch DI 727 Mirror operates abnormally Mirror Motor DI 727 Wire Harness 2000 LEXUS LS400 RM717U Author Date 1878 BE 16 BODY ELECTRICAL TROUBLESHOOTING 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 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 Driver s belt anchor can not be operated manually 1 Driving Position Memory and Return Switch 2 Driver Door ECU The anchor does not return to the memorized position 3 Multiplex Communication Circuit 4 Tilt and Telescopic ECU 5 Wire Harness The memorized position is moved 1 Height Adjustable Anchor Sensor BE 188 1 Shoulder Belt Adjust Switch Passenger s 2 Shoulder Belt Anchor Relay 3 Wire Harness 4 Height Adjustable Anchor Motor Passenger s belt anchor can not be
19. operated manually ELECTRO CHROMIC MIRROR SYSTEM ECU IG Fuse Instrument Panel J B Electro Chromic Inner Mirror does not operate Elector Chromic Inner Mirror Wire Harness ECU IG Fuse Instrument Panel J B Electro Chromic Outer Mirror Elector Chromic Inner Mirror Wire Harness Electro Chromic Outer Mirror does not operate SEAT HEATER SYSTEM 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 V 1 Seat Heater Switch BE 198 Driver s seat heater does not operate 2 Wire Harness 1 Seat Heater Switch BE 198 Passenger s seat heater does not operate 2 Fd Harness Seat Seat heater temperature is too hot si is too hot 1 4 Seat Heater 0 Heater BE Be 198 FUEL LID OPENER SYSTEM 1 FUEL OPN Fuse Instrument Panel J B 2 Fuel Lid Opener Switch 3 Fuel Lid Opener Solenoid 4 Wire Harness Seat heaters do not operate Driver s and Passenger s Fuel lid opener system does not operate 2000 LEXUS LS400 RM717U Author Date 1879 BE 17 BODY ELECTRICAL TROUBLESHOOTING GARAGE DOOR OPENER SYSTEM 1 Garage Door Opener 2 Wire Harness ate a 2 Wire Harness 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 HORN Fuse Engine Room J B Horn Relay Engine Room J B Horn syste
20. rection 3 Wire Hamess 1 Ignition Switch 2 TURN Fuse Instrument Panel J B 3 Turn Signal Switch 4 Wire Harness 1 Turn signal does not light up 1 TURN Fuse Instrument Panel J B 2 Turn signal does not light up 2 Turn Signal Switch 3 Wire Harness 2000 LEXUS LS400 RM717U Author Date 1870 BE 8 BODY ELECTRICAL TROUBLESHOOTING 1 Turn Signal Switch BE 38 2 Wire Harness 1 Bulb Only one bulb does not light up 2 Wire Harness 1 Combination Meter Wiper and Washer do not operate 2 Combination Meter Wiper and Washer are normal ILLUMINATION LIGHT SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting Turn signal does not light up in one direction Symptom Suspect Area See page 1 PANEL Fuse Instrument Panel J B 2 Rheostat Light Control 3 Wire Harness Illumination light do not light Taillight is normal 1 Taillight Control Relay Instrument Panel J B 2 Taillight System Illumination light do not light 3 Rheostat Light Control Taillight does not light g 4 Wire Harness 5 PANEL Fuse Instrument Panel J B Onl light d t light a nly one light does not light 2 Wire Harness INTERIOR LIGHT SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting
21. urtesy Switch Driver Door ECU Front Passenger Door ECU Body ECU Multiplex Communication Circuit Door Unlock Detection Switch Wire Harness Transmitter Ignition Switch Key Unlock Warning Switch Body ECU Wire Harness Transmitter Headlight System Wire Harness Body ECU Taillight System Wire Harness Body ECU Theft Deterrent Horn Horn Horn Relay HORN Fuse Engine Room J B Wire Harness Body ECU Author Date 1876 BE 14 BODY ELECTRICAL TROUBLESHOOTING Door Key Lock and Unlock Switch Body ECU Wire Harness Driver Door ECU Front Passenger Door ECU Multiplex Communication Circuit Transmitter While the warning is given the system cannot be canceled by unlocking the door with key or transmitter Ignition Switch Key Unlock Warning Switch While the warning is given the system cannot be canceled by RADIO NO 2 Fuse Instrument Panel J B turning the ignition switch to ON with key GAUGE Fuse Instrument Panel J B Body ECU Wire Harness WIRELESS DOOR LOCK CONTROL SYSTEM This system uses the multiplex communication system so check diagnosis system of the multiplex commu nication system before you proceed with troubleshooting e Whole wireless door lock control system does not operate Problem occurs only at a specific locality gt Precheck type See page BE 154 Problem occurs everywhere Precheck type II See pag
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