T-SB-0098-20

T-SB-0098-20
October 5, 2020
Chirp Noise From the Main Accessory Drive Belt
Service
Category
Engine/Hybrid System
Section
Engine Mechanical
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2016 - 2020
Tacoma
VDS(s): AZ5CN, BZ5DN, CZ5AN, DZ5BN,
EZ5CN, GZ5AN, RZ5CN, SZ5AN
Engine(s): 2GR
Introduction
Some 2016 – 2020 model year Tacoma vehicles equipped with a 2GR-FKS engine may exhibit a
chirp noise from the main accessory drive belt. Follow the Repair Procedure in this bulletin to
address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
3TMAZ5CN#KM113871
2WD
3TMBZ5DN#KM023284
3TMEZ5CN#LM114685
TMMBC
3TMCZ5AN#KM285777
4WD
3TMGZ5AN#KM285795
3TMDZ5BN#KM079287
© 2020 Toyota Motor Sales, USA
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Chirp Noise From the Main Accessory Drive Belt
Production Change Information (continued)
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
5TFAZ5CN#KX087221
5TFBZ5DN#KX004929
2WD
5TFEZ5CN#KX087230
5TFRZ5CN#KX087218
TMMTX
5TFCZ5AN#KX210730
5TFSZ5AN#KX210731
4WD
5TFDZ5BN#KX046490
5TFGZ5AN#KX210814
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
160251
R & R V-ribbed Belt
0.2
90916-A2025
91
40
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.
Parts Information
PART NUMBER
PREVIOUS
NEW
90916-A2025
90916-A2037
© 2020 Toyota Motor Sales, USA
PART NAME
QTY
Belt, V-ribbed
1
T-SB-0098-20
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Chirp Noise From the Main Accessory Drive Belt
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit a chirp noise from the main accessory drive belt?

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Remove the main accessory drive belt.
Refer to TIS, applicable model and model year Repair Manual:
2016 – 2020 Tacoma:
Engine/Hybrid System – Engine Mechanical – “2GR-FKS (Engine Mechanical):
Drive Belt: Removal”
3. Start the engine and confirm the condition is NOT present with the main accessory
drive belt removed.
NOTICE
Only run the engine for MAXIMUM of 10 seconds with the drive belt removed.
Does the vehicle exhibit a chirp noise with the main accessory drive belt removed?

NO — Continue to step 4.

YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2020 Toyota Motor Sales, USA
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Chirp Noise From the Main Accessory Drive Belt
Repair Procedure (continued)
4. Install the NEW main accessory drive belt.
NOTE
BEFORE installing new main accessory drive belt:
 Ensure pulleys are clean of debris and dry.
 Confirm component pulley alignment.
Refer to TIS, applicable model and model year Repair Manual:

2016 – 2020 Tacoma:
Engine/Hybrid System – Engine Mechanical – “2GR-FKS (Engine Mechanical):
Drive Belt: Installation”
Figure 1.
NOTE
 Slight wobble of the upper idler pulley is a
normal condition.
 Refer to the video link for an example of a
normal idler pulley operation:
1
Example of Normal Idler Pulley Operation
 Do NOT replace the upper idler pulley for this
slight wobble condition.
1
Upper Idler Pulley
5. Test-drive the vehicle to confirm the condition no longer exists.
© 2020 Toyota Motor Sales, USA