2017-2018 Toyota Highlander and Sienna Transaxle Whine Noise, Harsh Shift, MIL ON, or Reduced Power T-SB-0160-18 Revision 1

MG

Moderator
*** This condition has a Transmission Warranty Extension called ZJC. Please see here...

Please see T-SB-0160-18 Revision 1


Applicability:
2017-2018 Toyota Highlander and Sienna
Transmission(s): 8AT

REVISION NOTICE:
May 11, 2021 Rev1
The Introduction, Required Tools & Equipment, and Repair Procedure sections have been updated. Any previous printed versions of this bulletin should be discarded

Introduction:
Some 2017 – 2018 model year Highlander and Sienna vehicles may exhibit a whine noise while driving, a harsh shift, MIL ON, or reduced power. The following Diagnostic Trouble Codes (DTCs) may be present: P07457F, P07757F, P07957F, P28077F, P28167F, P08BA7F, P27137F, P07407E, P27567F, P211904, or P071531. For transaxles within the specified dates that meet the required symptoms, a remanufactured transaxle is available. Follow the Repair Procedure in this bulletin to address this condition.

NOTICE:
Mismatched transaxle assembly hardware and Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) software combinations may result in a harsh shift or shift flare. If this occurs after the original repair, additional ECM (PCM) replacement and reprogramming will be required. The additional ECM (PCM) replacement and/or reprogramming is NOT covered under warranty.

Production Change Confirmation Procedure:
Locate the transaxle serial number, found on the sticker located on the transaxle assembly side cover or on the engraved location as shown. A serial number decoder is also provided below.

2018 Camry and Highlander Transmission Serial Number Decoder T-TT-0474-18

APPLICABLE WARRANTY: Please see Transmission Warranty Extension ZJC
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 occurrence of the specified condition described in this bulletin.

Repair Procedure
1. Confirm the transaxle serial number. Does the transaxle serial number begin with 7A6 AND come BEFORE 7A617E03416?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

2. Confirm the transmission revolution sensor (NT) sensor speed.
A. Connect Techstream to the vehicle and select Engine Data List.
B. Place the vehicle in Park and apply the parking brake.
C. Increase the engine speed to 1,000 rpm. Is the NT sensor speed less than or equal to the specification in Table 1 at the given parameter?
YES — Continue to step 3.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

3. Confirm if ANY of the following conditions are present.
A. Diagnostic Trouble Code (DTC) P07457F, P07757F, P07957F, P28077F, P28167F, P08BA7F, P27137F, P07407E, P27567F, P211904, or P071531 is present.
B. Harsh shift.
C. A whine noise is present while driving in D range.

Are ANY of the conditions listed above present?
YES — Continue to step 4.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

4. Replace the transaxle.

5. Confirm the ECM software matches the replacement transaxle.

6. Test-drive the vehicle to confirm proper operation
 
G

Greg Daisa

Guest
How should I approach this situation?
I have a 2018 Sienna and the transmission performance is horrible.
 
H

High2018

Guest
The biggest question is why its whining ? what is the culprit ? there is a tons of people who has this symptoms on the HL 2017 to 2019 year. and they all are out of warranty. ZJC program is not applicable to them. calling Toyota corporate is not helping.
 
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