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Symptom Tests: Notes

WARNING: This page is about a different car, the 2000 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Body control system is an integral part of multiplex control system. Before attempting to diagnose any body control systems, make sure that body control ECU is able to communicate with rest of multiplex control system. See MULTIPLEX CONTROL SYSTEMS - AVALON article.

To determine which diagnostic testing procedure to follow, locate symptom in BODY CONTROL SYSTEM SYMPTOM/TEST PROCEDURE  table.

BODY CONTROL SYSTEM SYMPTOM/TEST PROCEDURE

Body Control System Symptom/Test Procedure
Ignition Switch/Key Unlock Warning (1) IGNITION SWITCH IS NOT SET TO EACH POSITION 
KEY UNLOCK WARNING SYSTEM INOPERATIVE 
KEY UNLOCK WARNING SYSTEM INOPERATIVE 
Headlights & Taillights (USA) (2) ONLY ONE HEADLIGHT DOES NOT LIGHT 
BOTH HEADLIGHTS DO NOT LIGHT 
LOW BEAM HEADLIGHTS DO NOT LIGHT 
HIGH BEAM HEADLIGHTS DO NOT LIGHT 
FLASHING HIGH BEAM HEADLIGHTS INOPERATIVE 
ONLY ONE SIDE TAILLIGHT DOES NOT LIGHT 
BOTH TAILLIGHTS DO NOT LIGHT 
REAR COMBINATION (TAIL/SIDE MARKER) LIGHT DOES NOT LIGHT 
Headlights & Taillights (Canada) (3) ONLY ONE HEADLIGHT DOES NOT LIGHT 
BOTH HEADLIGHTS DO NOT LIGHT 
LOW BEAM HEADLIGHTS DO NOT LIGHT 
HIGH BEAM HEADLIGHTS DO NOT LIGHT 
FLASHING HIGH BEAM HEADLIGHTS INOPERATIVE 
HEADLIGHTS DO NOT LIGHT WITH ENGINE RUNNING AND LIGHT SWITCH OFF 
ONLY ONE SIDE TAILLIGHT DOES NOT LIGHT 
BOTH TAILLIGHTS DO NOT LIGHT 
REAR COMBINATION (TAIL/SIDE MARKER) LIGHT DOES NOT LIGHT 
Auto Turn Off (Interior Lights) (4) AUTO TURN OFF SYSTEM DOES NOT OPERATE 
Interior Lights (5) ONLY ONE INTERIOR LIGHT DOES NOT WORK 
ALL INTERIOR LIGHTS DO NOT WORK 
PERSONAL LIGHT DOES NOT WORK 
ILLUMINATED ENTRY SYSTEM INOPERATIVE 
FRONT PERSONAL LIGHT DOES NOT WORK 
REAR INTERIOR (PERSONAL) LIGHT DOES NOT WORK 
VANITY LIGHT DOES NOT WORK 
TRUNK LIGHT DOES NOT WORK 
Combination Meter (6) DRIVER OR PASSENGER SEAT BELT WARNING LIGHT DOES NOT WORK 
OPEN DOOR WARNING LIGHT DOES NOT WORK 
Power Windows (7) ALL POWER WINDOWS DO NOT WORK 
DRIVER'S DOOR WINDOW DOES NOT WORK 
FRONT PASSENGER'S WINDOW DOES NOT WORK 
BOTH REAR POWER WINDOWS DO NOT WORK 
ONE REAR WINDOW DOES NOT WORK 
Power Door Locks (8) ALL POWER DOOR LOCKS DO NOT WORK 
POWER DOOR LOCKS DO NOT OPERATE BY SWITCH 
POWER DOOR LOCKS DO NOT OPERATE BY DOOR KEY 
FAULTY DRIVER'S DOOR 2-STEP UNLOCK FUNCTION 
ONE POWER DOOR LOCK DOES NOT WORK 
KEY CONFINEMENT PREVENTION FUNCTION DOES NOT WORK 
AUTO LOCK/UNLOCK SYSTEM DOES NOT WORK 
Trunk Opener (9) TRUNK OPENER SYSTEM DOES NOT WORK 
Wireless Door Lock Controls (10) ALL WIRELESS DOOR LOCK CONTROL FUNCTIONS DO NOT WORK 
LOCK OR UNLOCK FUNCTION DOES NOT WORK 
AUTOMATIC LOCK FUNCTION OPERATES EVEN IF DOOR IS OPENED WITHIN 30 SECONDS OF BEING UNLOCKED WITH REMOTE TRANSMITTER 
WIRELESS DOOR LOCKS WORK, BUT BUZZER DOES NOT SOUND 
BUZZER SOUNDS, BUT WIRELESS DOOR LOCKS DO NOT WORK 
TRUNK OPENER DOES NOT WORK WITH REMOTE TRANSMITTER 
Power Mirrors (11) MIRROR DOES NOT WORK 
MIRROR WORKS ABNORMALLY 
Horns HORN SYSTEM 
(1) See IGNITION SWITCH AND KEY UNLOCK WARNING SWITCH  test procedures.
(2) See HEADLIGHT & TAILLIGHT SYSTEM (USA)  test procedures.
(3) See HEADLIGHT & TAILLIGHT SYSTEM (CANADA)  test procedures.
(4) See AUTO TURN OFF SYSTEM  test procedures.
(5) See INTERIOR LIGHT SYSTEM  test procedures.
(6) See COMBINATION METER  test procedures.
(7) See POWER WINDOW CONTROL SYSTEM  test procedures.
(8) See POWER DOOR LOCK CONTROL SYSTEM  test procedures.
(9) See TRUNK OPENER SYSTEM  test procedures.
(10) See WIRELESS DOOR LOCK CONTROL SYSTEM  test procedures.
(11) See POWER MIRROR CONTROL SYSTEM  test procedures.
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