Avensis auxiliary belt slip

[RDP]

Hello all,

I own a 2012 Avensis, 2l D-4D, which has had an ongoing issue with the auxiliary belt - it makes a slipping noise when I accelerate, normally in a high gear (60mph 6th gear). I’ve had the Toyota garage look at it a few times and the temporary remedy has been to re-tension or replace. But the slipping resumes a couple of months later. 

Any ideas what is causing the tension to slacken or why this is happening at all?

Thanks in advance.

Richard

[Devon Aygo]

There was a Technical service bulletin for something similar:

EG-0014T-0114

Subject: 1AD-FTV V-Belt abnormal noise

Models: AURIS; AVENSIS; COROLLA; VERSO

Model codes: ADE150; ADE157; ADE186; ADT250; ADT251; ADT270; ADT271; ADE150; AUR20; AUR21

DESCRIPTION OF PHENOMENON Some customers may experience and report squeaking noise from BELT, V-RIBBED around 1500~2000rpm, due to slipping of the belt on the pulleys.

PRODUCTION CHANGE The design of the BELT, V-RIBBED has been changed to avoid slipping.

PARTS INFORMATION Previous part number 90916-02724, Current part number 90916-02736

REPAIR PROCEDURE

1. Check the ''TENSIONER ASSY, V-RIBBED BELT'' after disassembling the BELT, V-RIBBED according to the repair manual.

2. In case of abnormality of the ''TENSIONER ASSY, V-RIBBED BELT'', replace it. If no abnormality is present, then do not replace.

3. Only replace the BELT, V-RIBBED according to the repair manual

You say you have had a new belt, do you have an invoice, what part number belt was used? as the bulletin is a field fix only and was not included into production it is possible the dealer hasn't seen the bulletin so may not have used the modified belt

[RDP]

@Devon Aygo thank you very much - this is great info. 

[salta_grades]

On 8/5/2019 at 7:59 PM, Devon Aygo said:

There was a Technical service bulletin for something similar:

EG-0014T-0114

Subject: 1AD-FTV V-Belt abnormal noise

Models: AURIS; AVENSIS; COROLLA; VERSO

Model codes: ADE150; ADE157; ADE186; ADT250; ADT251; ADT270; ADT271; ADE150; AUR20; AUR21

DESCRIPTION OF PHENOMENON Some customers may experience and report squeaking noise from BELT, V-RIBBED around 1500~2000rpm, due to slipping of the belt on the pulleys.

PRODUCTION CHANGE The design of the BELT, V-RIBBED has been changed to avoid slipping.

PARTS INFORMATION Previous part number 90916-02724, Current part number 90916-02736

REPAIR PROCEDURE

1. Check the ''TENSIONER ASSY, V-RIBBED BELT'' after disassembling the BELT, V-RIBBED according to the repair manual.

2. In case of abnormality of the ''TENSIONER ASSY, V-RIBBED BELT'', replace it. If no abnormality is present, then do not replace.

3. Only replace the BELT, V-RIBBED according to the repair manual

You say you have had a new belt, do you have an invoice, what part number belt was used? as the bulletin is a field fix only and was not included into production it is possible the dealer hasn't seen the bulletin so may not have used the modified belt

Thanks!!!! It helped me a lot with a problem with more than a year. Same engine but in a 2011 Verso. Perfect!!!!