Electrical/Cooling Sys. - HV Cooling Fan Maintenance
T-SB-0198-11December 15, 2011
HV Battery Cooling Fan Maintenance for Severe Usage Vehicles
Service Category
Engine/Hybrid System
Section
Hybrid/Battery Control System
Market
USA
Applicability
Introduction
For vehicles that are used under certain severe operating conditions the HV Battery Cooling Fan may experience an excessive buildup of dust lint or other debris that can reduce the efficiency of the HV Battery Cooling System. HV Battery Cooling Fan maintenance and cleaning should be performed to address this condition.
NOTE
The following procedure should be completed every 25,000 miles OR any time the HV Battery Assembly is replaced.
Warranty Information
Repair Procedure
1. Is the vehicle subject to all of the operating conditions detailed below?
(1) The vehicle is used for over 15 hours per day.
(2) The vehicle is used over 6 days per week.
(3) The right rear seat is used over 50 times per day.
YES - Go to step 2.
NO - This TSB does NOT apply.
2. Remove the HV Battery Cooling Fan Assembly.
Refer to the Technical Information System (TIS) applicable model year Prius Repair Manual:
^ 2010 / 2011 / 2012 Prius:
Engine/Hybrid System - Hybrid/Battery Control System - "Hybrid/Battery
Control: Battery Blower: Removal"
3. Using compressed air clean any dust lint or debris buildup from the HV Battery Cooling Fan blades. At this time secure the fan blades to prevent turning while cleaning.
4. Re-install the HV Battery Cooling Fan Assembly and verify normal operation.
Refer to TIS applicable model year Prius Repair Manual:
^ 2010 / 2011 / 2012 Prius:
Engine/Hybrid System - Hybrid/Battery Control System - "Hybrid/Battery
Control: Battery Blower: Installation"
5. Repeat this procedure as normal maintenance every 25,000 miles.