2001 Toyota Sienna LEFACTORY OEM SERVICE PROCEDURE

System Tests: Notes

NOTE: Before proceeding with any system test, ensure trouble shooting procedure was performed. See TROUBLE SHOOTING PROCEDURE  under TROUBLE SHOOTING.
SYMPTOM INDEX

System & Symptom Test To Be Performed
Ignition Switch & Key Unlock Warning Switch System 
Ignition Switch Does Not Operate In Each Position Test No. 1 
Key Unlock Warning System Buzzer Does Not Sound When Driver's Side Front Door Is Opened With Ignition Off & Ignition Key In Ignition Lock Cylinder Test No. 2 
Key Unlock Warning System Buzzer Sounds When Ignition Switch Is In ACC Or ON Position Test No. 3 
Headlight & Taillight System 
Automatic Light Control System Does Not Operate (1) Test No. 4 
Headlight Does Not Operate Test No. 5 
Low Beam Headlight Does Not Operate Test No. 6 
High Beam Headlight Does Not Operate Test No. 6 
Flash High Beam Headlight Feature Does Not Operate Test No. 6 
Headlight Does Not Operate With Engine Running & Headlight Switch In OFF Position Test No. 7 
Taillight Does Not Operate Test No. 8 
Automatic Turn Off System For Lighting System  (2) 
Automatic Turn Off System Does Not Operate Test No. 9 
Interior Lighting System 
Only One Interior Light Does Not Operate Test No. 10 
All Interior Lights Do Not Operate Test No. 11 
Illuminated Entry System Does Not Operate Test No. 12 
Front Interior Light At Front Of Headliner Does Not Operate Test No. 13 
Interior Light No. 1 At Center Of Headliner Does Not Operate Test No. 14 
Vanity Light Does Not Operate Test No. 15 
Interior Light No. 2 At Rear Of Headliner Does Not Operate Test No. 16 
Instrument Panel 
Driver's Seat Belt Warning Light On Instrument Cluster Does Not Operate Test No. 17 
Passenger's Seat Belt Warning Light On Clock Assembly Does Not Operate Test No. 18 
Open Door Warning Light Does Not Operate Test No. 19 
Power Door Lock Control System 
Power Door Lock System Does Not Operate On Any Door Test No. 20 
Power Door Lock System Does Not Operate When Using Manual Switch Test No. 21 
Power Door Lock System Does Not Operate When Using The Key Test No. 22 
Two-Operation Unlock Function Does Not Operate (3) Test No. 23 
Only One Power Door Lock Does Not Operate Test No. 24 
Key Confinement Prevention Function Does Not Operate (4) Test No. 25 
Auto Lock/Unlock System Does Not Operate Test No. 26 
Keyless Entry System 
All Functions Of Keyless Entry System Will Not Operate Test No. 27 
Lock Or Unlock Function Does Not Operate Test No. 28 
Automatic Lock Function Operates Even If Door Is Opened Within 30 Seconds After All Doors Are Unlocked Using Keyless Entry System (5) Test No. 29 
Keyless Entry System Operates But Buzzer Will Not Sound Test No. 30 
Buzzer Sounds But Keyless Entry System Will Not Operate Test No. 31 
Horn System 
Horn System Does Not Operate Test No. 32 
Horns Operate All The Time Test No. 32 
Only One Horn Operates Test No. 32 
Horns Operate Abnormally Test No. 32 
(1) Automatic light control system turns on or off the headlights, park lights, taillights, side marker lights and instrument panel lights according to darkness of surrounding lighting. Headlight control switch must be position No. 3 (AUTO position) for automatic light control system to operate.
(2) Automatic turn off system turns off the lights when driver's side front door is opened with the ignition off and headlights are turned on with ignition key in the ACC or LOCK position.
(3) Two-operation unlock function unlocks all doors. When using the key and turning driver's side door lock once, only driver's door will unlock. Turning driver's side door lock twice in succession will unlock all the doors.
(4) Key confinement prevention function prevents the doors from being locked if ignition key is in the ignition lock cylinder.
(5) Automatic lock function allows 30 seconds to open the door once the door is unlocked with the keyless remote or the door will be locked again.
Factory Service Tools

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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