Tundra 4WD V8-5.7L (3UR-FE) (2007)
Engine Control Module: Customer Interest
A/C - Poor Heater Performance When Cold
T-SB-0231-10
August 5, 2010
Heater Performance
Service Category
Engine/Hybrid System
Engine Control
Market
USA
Applicability
Introduction
Some 2008 model year Sequoia and 2007 - 2008 model year Tundra vehicles may exhibit reduced cold-start heater warm-up performance in cold
conditions. A newly designed Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic is available to address this condition.
Use the following repair procedure to recalibrate the ECM (PCM).
Warranty Information
APPLICABLE WARRANTY
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This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for 96 months or 80,000 miles, whichever occurs first,
from the vehicle's in-service date.
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Warranty application is limited to occurrence of the specified condition described in this bulletin.
Production Change Information