T-SB-0012-15

T-SB-0012-15
March 19, 2015
Drive Belt Squeal Noise on Cold Start
Service
Category
Engine/Hybrid System
Section
Engine Mechanical
USA
Market
Applicability
YEAR(S)
MODEL(S)
2006 – 2015
Yaris
ADDITIONAL INFORMATION
Introduction
Some 2006 – 2015 model year Yaris vehicles may exhibit a squealing noise coming from the engine
compartment during the engine start-up. The drive belt (v-belt) tension specification has been
updated to address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PRODUCTION CHANGE EFFECTIVE VIN
Yaris
VNKKTUD3#FA028439
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
EG1500
Inspect V-Belt and Adjust Tension
0.2
90916-02705
EG1501
R & R V-Belt and Adjust Tension
0.4
90916-02705
T1
T2
91
14
APPLICABLE WARRANTY
• This repair is covered under the Toyota Basic 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 occurrence of the specified condition described in
this bulletin.
© 2015 Toyota Motor Sales, USA
Page 1 of 4
March 19, 2015
T-SB-0012-15
Page 2 of 4
Drive Belt Squeal Noise on Cold Start
Parts Information
PART NUMBER
PART NAME
QTY
90916-02705
Belt, V-Ribbed
1
Required Tools & Equipment
REQUIRED TOOLS & EQUIPMENT
PART NUMBER
QTY
Denso BTG-20 (Belt Tension Gauge)
95506-00020
1
Repair Procedure
1. Verify the condition as described in the Introduction.
2. Inspect the V-Belt physical condition and tension.
Figure 1..
1
NOTE
Visually check the belt for excessive wear,
frayed cords etc.
What is the condition of the V-Belt?
2
• V-Belt is physically OK and tension is
within specifications (350 Nm – 400
Nm) — This bulletin does NOT apply.
Continue diagnosis using the applicable
Repair Manual.
5
3
• V-Belt shows signs of fraying, scoring, or
glazing — Continue to step 3.
• V-Belt is physically OK but tension is
below 350 Nm — Continue to step 4.
4
1
Alternator
2
Water Pump
3
Compressor
4
Measure Point for Belt Tension
5
Crankshaft Pulley
© 2015 Toyota Motor Sales, USA
March 19, 2015
T-SB-0012-15
Page 3 of 4
Drive Belt Squeal Noise on Cold Start
Repair Procedure (Continued)
3. Replace the V-Belt.
NOTE
See the NEW V-Belt specifications on page 4 of this bulletin.
Refer to the Technical Information System (TIS), applicable model and model year
Repair Manual:
• Yaris H/B 2006 / 2007 / 2008 /2009 / 2010 / 2011 / 2012 / 2013 / 2014 / 2015:
Engine/Hybrid System – Engine Mechanical– “1NZ-FE Engine Mechanical: Drive Belt:
Removal”
• Yaris Sedan 2012 / 2013 / 2014 / 2015:
Engine/Hybrid System – Engine Mechanical– “1NZ-FE Engine Mechanical: Drive Belt:
Removal”
• Yaris H/B 2006 / 2007 / 2008 /2009 / 2010 / 2011 / 2012 / 2013 / 2014 / 2015:
Engine/Hybrid System – Engine Mechanical– “1NZ-FE Engine Mechanical: Drive Belt:
Installation”
• Yaris Sedan 2012 / 2013 / 2014 / 2015:
Engine/Hybrid System – Engine Mechanical– “1NZ-FE Engine Mechanical: Drive Belt:
Installation”
4. Increase the V-Belt tension up to 400 Nm.
Figure 2.
A. Loosen bolt A.
NOTE
Do NOT loosen bolt B.
1
2
1
Bolt A
2
Bolt B
© 2015 Toyota Motor Sales, USA
March 19, 2015
T-SB-0012-15
Page 4 of 4
Drive Belt Squeal Noise on Cold Start
Repair Procedure (Continued)
B. Use a pry bar to increase V-Belt tension up to
a maximum of 400Nm.
Figure 3.
2
1
3
V-BELT
TENSION SPECIFICATION
Used
375 Nm – 400 Nm
New
750 Nm – 850 Nm
1
OK
2
Not Good
3
Front of the Vehicle
Figure 4.
1
2
5
3
4
1
Alternator
2
Water Pump
3
Compressor
4
Measure Point for Belt Tension
5
Crankshaft Pulley
5. Verify the noise is no longer present.
© 2015 Toyota Motor Sales, USA