Cooling - Noise From Coolant Heat Storage Water Pump
T-SB-0087-08June 5, 2008
Abnormal Noise from Coolant Heat Storage Water Pump
Service Category
Engine/Hybrid System
Section
Cooling
Market
USA
Applicability
Introduction
Some 2004 - 2008 model year Prius vehicles may exhibit a "squeak" type noise during vehicle startup or shutdown. This noise can be heard coming from the coolant heat storage water pump during cold ambient temperature conditions. Use the following procedure to address this condition only if the noise is confirmed to be coming from the coolant heat storage water pump.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown below.
Warranty Information
^ This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 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.
Components
Parts Information
Repair Procedure
1. After the noise is verified to be coming from the coolant heat storage water pump replace it with a NEW part.
Refer to the Technical Information System (TIS) applicable model year Prius Repair Manual:
^ 2004 / 2005 Prius Engine/Hybrid System - Cooling - "Coolant Heat Storage Water Pump (1NZ-FXE): Replacement"
^ 2006 / 2007 / 2008 Prius Engine/Hybrid System - Cooling - "1NZ-FXE Cooling: Coolant Heat Storage Water Pump: Removal"
^ 2006 / 2007 / 2008 Prius Engine/Hybrid System - Cooling - "1NZ-FXE Cooling: Coolant Heat Storage Water Pump: Installation"
2. Road test to verify proper operation of the coolant system.