Question about 2003 Toyota Sienna

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2003 Toyota Sienna A?C light blinking. Randomly cutting off when sitting at stop light or in park. will restart immediately. Now engine light on. Help.

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  • Expert
  • 344 Answers

Take it in to have a scran done on it, Most auto part store have a scranner, There is no charge to have it check out,

Posted on Nov 29, 2012

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6ya6ya
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Posted on Jan 02, 2017

ZJLimited
  • 17970 Answers

SOURCE: check engine light on my 2003 sienna, DTC was


Oxygen Sensor Connector locations

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  1. Disconnect the oxygen sensor connector.
  2. Using an ohmmeter, measure the resistance between the terminals +B and HT. Resistance specification: 11 - 16 ohms at 20°C (68°F).
  3. If the resistance is not as specified, replace the sensor.
  4. Reconnect the oxygen sensor connector.

Oxygen Sensor testing

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I really hope helped with this. Remember rated this help, good luck.

Posted on Nov 30, 2009

  • 1 Answer

SOURCE: 2003 Toyota 4 runner Issues

Replace your magnetic clutch relay.
TSB EL011-05 : A/C LIGHT FLASHING - MAGNETIC CLUTCH RELAY 6/3/2005 - 2001 – 2004 Toyota Camry, ECHO, & Celica. 2002 – 2004 4Runner, Corolla, & MR2 Spyder. 2003 – 2004 Matrix, Sienna, & Solara. This bulletin is to provide information regarding countermeasures to the A/C magnetic clutch relay for A/C light flashing (inoperative A/C) issues on some vehicles equipped with a magnetic clutch compressor.
Applicable Warranty*:
This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 miles, Whichever occurs first, from the vehicle’s in-service date.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint

Posted on Sep 20, 2008

  • 184 Answers

SOURCE: Indicator light for a 2003 Toyota Sienna.

Is this it? If so, it means check your tire pressure.
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Posted on Mar 26, 2009

Molson02536
  • 3854 Answers

SOURCE: 2002 Toyota Sienna speedometer quit

Yes it is all related. It sound's like your speed sensor (VVS) has gone bad. There are two of them, one is an in put Velocity sensor and the out is the out put Velocity sensor.
Your going to have to get the Van scanned to find out which on has gone bad. Most of the time it's going to be the out put sensor and it not that hard to replace. 
You can do it your self or a transmission shop, as for getting your Van scanned for the codes to let you know which sensor when bad. Auto Zone or Parts source will scan for free and can give you instructions on how to locate and replace the sensor.
Good luck and hope this helps.

Posted on May 04, 2009

  • 1 Answer

SOURCE: toyota sienna - a/c light blinking

Hello, I am a tec. from Puerto Rico your problem does sound like the magnetic clutch. It is located directly on the compresor, over here we change them for around $150 including materials and work.

Posted on Jan 26, 2010

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2003 Toyota 4 runner Issues


Replace your magnetic clutch relay.
TSB EL011-05 : A/C LIGHT FLASHING - MAGNETIC CLUTCH RELAY 6/3/2005 - 2001 – 2004 Toyota Camry, ECHO, & Celica. 2002 – 2004 4Runner, Corolla, & MR2 Spyder. 2003 – 2004 Matrix, Sienna, & Solara. This bulletin is to provide information regarding countermeasures to the A/C magnetic clutch relay for A/C light flashing (inoperative A/C) issues on some vehicles equipped with a magnetic clutch compressor.
Applicable Warranty*:
This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 miles, Whichever occurs first, from the vehicle’s in-service date.
* Warranty application is limited to correction of a problem based upon a customer’s specific complaint

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