Electrical - Excessive Battery Drain

T-SB-0056-12

March 16, 2012

Battery Excessive Draw - Integration Relay

Service Category
Power Source/Network

Section
Power Distribution

Market
USA





Applicability

Introduction

Some 2011 Sienna vehicles may exhibit a condition where the battery loses its charge overnight even though the vehicle was properly closed and locked with the interior lights turned off. In the event that a parasitic draw exceeding 2 amps is discovered and the A/C compressor clutch is confirmed to remain on with the ignition oft this bulletin provides a repair procedure involving circuit inspection and replacement of the Integration Relay.

Production Change Information





This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs shown.





Parts Information





Warranty Information





Required Tools & Equipment

Inspection Procedure

1. Confirm the vehicle is produced before VIN # listed above.





2. If an abnormally high parasitic draw of approximately 2 amps is confirmed with ignition key in the "OFF" position proceed to step 3.

3. With the ignition key in the "OFF" position, disconnect connector B41 and verify the A/C clutch audibly clicks "OFF". If a click is heard proceed to step 4.

4. From the front side of the connector, confirm battery voltage on A/C clutch B41 connector. If battery voltage is present, proceed to step 5.

5. Replace Integration Relay.

NOTE

For additional details on inspection and repair, refer to the Technical Information System (TIS), applicable model and model year Repair Manual:

^ 2011 Sienna:

Vehicle Interior - Heating/Air Conditioning - "Air Conditioning System (for Manual Air Conditioning System: Air Conditioning Compressor Magnetic Clutch Circuit"

Integration Relay Replacement





1. Release the black retaining tabs at the top of the relay using a pick or blade screw driver.





2. Grasp and pull straight up on the integration relay after both tabs are released.





3. Release all 3 connectors at the bottom of the integration relay.

4. Connect all 3 connectors into the bottom of the new integration relay and push the relay assembly down into the junction block until both black tabs click into place.

5. Confirm normal compressor clutch on/off operation with engine running and A/C on and with vehicle turned off.