2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE

Body Control System

WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM INDEX (KEY UNLOCK WARNING SWITCH SYSTEM & IGNITION SWITCH)

Symptom Perform Test
Ignition Switch Does Not Operate In Each Position TEST NO. 1 
Key Unlock Warning System Does Not Operate
Buzzer Does Not Sound When Driver Door Is Opened With Ignition Off & Key In Ignition Lock Cylinder TEST NO. 2 
Buzzer Sounds When Driver Door Is Opened With Ignition In ACC Or ON Positions & Key In Ignition Lock Cylinder TEST NO. 3 
SYMPTOM INDEX (HEADLIGHT & TAILLIGHT SYSTEM - WITHOUT DAYTIME RUNNING LIGHTS)

Symptom Perform Test
One Headlight Does Not Operate TEST NO. 4 
No Headlights Operate TEST NO. 5 
Low Beam Circuit Does Not Operate TEST NO. 6 
High Beam Circuit Does Not Operate TEST NO. 7 
Flash Feature Does Not Operate (1) TEST NO. 8 
One Taillight Does Not Operate TEST NO. 9 
All Taillights Do Not Operate TEST NO. 10 
Brake Light/Taillight In Rear Combination Light Does Not Operate TEST NO. 11 
Automatic Headlights Off Delay System Does Not Operate(2) TEST NO. 12 
(1) Flash feature activates high beam when light control switch is pulled all the way back toward driver and deactivates high beam circuit when released. This feature operates with headlights on or off.
(2) Automatic headlights off delay system turns lights off after 30 seconds when all doors and trunk are closed after turning ignition from ON position to ACC or LOCK position with light control switch in position No. 2 (headlights and all lights listed for position No. 1), or after 20 minutes or more when door or trunk is left open. Lights will automatically turn off when driver door is opened with headlight control switch in position No. 1 (parking lights, taillights, side marker lights and instrument panel lights). If doors are locked with wireless door lock control transmitter, lights turn off immediately.
SYMPTOM INDEX (HEADLIGHT & TAILLIGHT SYSTEM - WITH DAYTIME RUNNING LIGHTS)

Symptom Perform Test
One Headlight Does Not Operate TEST NO. 13 
All Headlights Do Not Operate TEST NO. 14 
Low Beam Circuit Does Not Operate TEST NO. 15 
High Beam Circuit Does Not Operate TEST NO. 16 
Flash Feature Does Not Operate (1) TEST NO. 17 
Daytime Running Lights Do Not Operate With Engine Running & Light Control Switch Off TEST NO. 18 
One Taillight Does Not Operate TEST NO. 9 
All Taillights Do Not Operate TEST NO. 10 
Brake Light/Taillight In Rear Combination Light Does Not Operate TEST NO. 11 
Automatic Headlights Off Delay System Does Not Operate (2) TEST NO. 12 
(1) Flash feature activates high beam when light control switch is pulled all the way back toward driver and deactivates high beam circuit when released. This feature operates with headlights on or off.
(2) Automatic headlights off delay system turns lights off after 30 seconds when all doors and trunk are closed after turning ignition from ON position to ACC or LOCK position with light control switch in position No. 2 (headlights and all lights listed for position No. 1), or after 20 minutes or more when door or trunk is left open. Lights will automatically turn off when driver door is opened with headlight control switch in position No. 1 (parking lights, taillights, side marker lights and instrument panel lights). If doors are locked with wireless door lock control transmitter, lights turn off immediately.
SYMPTOM INDEX (INTERIOR LIGHT SYSTEM)

Symptom Perform Test
Only One Interior Light Does Not Operate TEST NO. 19 
All Interior Lights Do Not Operate TEST NO. 20 
Dome Light Does Not Operate TEST NO. 21 
Illuminated Entry System Does Not Operate TEST NO. 22 
Front Personal Light Does Not Operate TEST NO. 23 
Rear Personal Light Does Not Operate TEST NO. 24 
Vanity Light Does Not Operate TEST NO. 25 
Luggage Compartment Light Does Not Operate TEST NO. 26 
SYMPTOM INDEX (INSTRUMENT PANEL)

Symptom Perform Test
Seat Belt Warning Light Does Not Operate TEST NO. 27 
OPEN DOOR Indicator Light Does Not Operate TEST NO. 28 
SYMPTOM INDEX (POWER WINDOW SYSTEM)

Symptom Perform Test
All Power Windows Do Not Operate TEST NO. 29 
Driver Door Power Window Does Not Operate TEST NO. 30 
Front Passenger Door Power Window Does Not Operate TEST NO. 31 
Both Rear Passenger Door Power Windows Do Not Operate TEST NO. 32 
Only One Rear Passenger Door Power Window Does Not Operate TEST NO. 33 
SYMPTOM INDEX (POWER DOOR LOCK SYSTEM)

Symptom Perform Test
Power Door Lock System Does Not Operate At All TEST NO. 34 
Power Door Lock System Does Not Operate When Using Manual Switch TEST NO. 35 
Power Door Lock System Does Not Operate When Using Key In External Door Lock Cylinder TEST NO. 36 
Driver Door Two-Operation Unlock Function Does Not Operate (1) TEST NO. 37 
Only One Power Door Lock Does Not Operate TEST NO. 38 
Key Confinement Prevention Function Does Not Operate (2) TEST NO. 39 
Automatic Door Lock/Unlock System Does Not Operate (3) TEST NO. 40 
(1) Two-operation unlock function unlocks all doors when using key in external door lock cylinder. Turning key once in driver door lock unlocks driver door only. Turning key twice in succession in driver door lock unlocks all doors. Turning key once in front passenger door lock unlocks all doors. There is no function of turning key twice in front passenger door lock.
(2) Key confinement prevention function prevents doors from being locked if ignition key is in ignition lock cylinder.
(3) Automatic door lock system locks all doors automatically when ignition is turned from OFF or ACC position to ON position, shift lever is moved from Park and brake is released for the first time after all doors are closed. As a fail-safe function, automatic door lock system will be inhibited if air bag sensor is detected to be open or shorted.
SYMPTOM INDEX (LUGGAGE COMPARTMENT OPENER SYSTEM)

Symptom Perform Test
Luggage Compartment Door Opener System Does Not Operate TEST NO. 41 
SYMPTOM INDEX (WIRELESS DOOR LOCK CONTROL SYSTEM)

Symptom Perform Test
All Functions Of Wireless Door Lock Control System Do Not Operate TEST NO. 42 
Lock Or Unlock Function Does Not Operate TEST NO. 43 
Automatic Lock Function Operates Even If Any Door Is Opened 30 Seconds After All Doors Are Unlocked Using Wireless Door Lock Control System (1) TEST NO. 44 
Wireless Door Lock Control System Operates, But Buzzer Does Not Sound TEST NO. 45 
Wireless Door Lock Control System Does Not Operate, But Buzzer Does Sound TEST NO. 46 
Luggage Compartment Door Opener Function Does Not Operate Using Wireless Door Lock Control System TEST NO. 47 
(1) Automatic lock function allows 30 seconds to open any door after locking doors with wireless door lock control system before all doors all locked again.
SYMPTOM INDEX (POWER MIRROR CONTROL SYSTEM) (1)

Symptom Perform Test
Power Mirror Does Not Operate (2)
Power Mirror Operates Abnormally (2)
(1) Power mirrors for models equipped with driving position memory system are monitored by power seat ECU with information being shared with driver door ECU and/or front passenger door ECU. For models without driving position memory system, see POWER MIRRORS - AVALON article.
(2) See POWER SEATS - AVALON article.
SYMPTOM INDEX (HORN SYSTEM)

Symptom Perform Test
Horns Do Not Operate TEST NO. 48 
Horns Operate All The Time TEST NO. 49 
Only One Horn Operates TEST NO. 50 
Horns Operate Abnormally TEST NO. 51 
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