NHTSA ID Number: 11027561
Manufacturer Communication Number: T-SB-0093-25
TSB/Document Date: 2026-01-09
Summary
Some 2024 – 2025 model year 4WD Tacoma and Tacoma Hybrid vehicles may exhibit a condition where the 4WD lights are flashing and a MIL ON condition with one or more of the following Diagnostic Trouble Codes (DTCs) present: •P277111 – Four Wheel Drive (4WD) Low Switch Circuit Short to Ground •P178462 – 4WD/AWD Transfer Case Shift Motor Limit Switch and Transfer Case H4-L4 Position Switch Signal Compare Failure •P17AC62 – 4WD/AWD Transfer Case Shift Motor Limit Switch Signal Compare Failure The transfer case breather hose has been updated.
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TSB/Document ID: T-SB-0093-25
Replacement Service Bulletin Number:
MFR Communication Date: 2025-12-17
MFR Internal Campaign ID/Software Version: T-SB-0093-25
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: STRUCTURE:BODY
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
T-SB-0093-25
December 17, 2025
Flashing 4WD Lights and MIL ON with DTC P277111,
P178462 and/or P17AC62
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA and
Mexico
Applicability
YEAR(S)
MODEL(S)
2024 - 2025
Tacoma HV
2024 - 2025
Tacoma
ADDITIONAL INFORMATION
Introduction
Some 2024 – 2025 model year 4WD Tacoma and Tacoma Hybrid vehicles may exhibit a condition
where the 4WD lights are flashing and a MIL ON condition with one or more of the following
Diagnostic Trouble Codes (DTCs) present:
P277111 – Four Wheel Drive (4WD) Low Switch Circuit Short to Ground
P178462 – 4WD/AWD Transfer Case Shift Motor Limit Switch and Transfer Case H4-L4
Position Switch Signal Compare Failure
P17AC62 – 4WD/AWD Transfer Case Shift Motor Limit Switch Signal Compare Failure
The transfer case breather hose has been updated. Follow the Repair Procedure in this bulletin to
address these conditions.
© 2025 Toyota Motor Sales, USA
Page 1 of 10
T-SB-0093-25
December 17, 2025
Page 2 of 10
Flashing 4WD Lights and MIL ON with DTC P277111, P178462 and/or P17AC62
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
DRIVETRAIN
TMMBC
PRODUCTION CHANGE EFFECTIVE VIN
3TMLB5JN#SM188780
3TYJBAJN#ST103526
3TYLE5JN#ST103526
3TYLB5JN#ST103526
Tacoma
3TYKE5JN#ST103526
4WD
TMMGT
3TYKB5JN#ST103526
3TYJDAKN#ST022854
3TYLD5KN#ST022854
3TYLC5LN#ST050624
Tacoma HV
3TYLF5LN#ST050624
© 2025 Toyota Motor Sales, USA
T-SB-0093-25
December 17, 2025
Page 3 of 10
Flashing 4WD Lights and MIL ON with DTC P277111, P178462 and/or P17AC62
Warranty Information
For USA Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
TC2505
R & R Transfer Case Shift Actuator and
Install New Breather Hose
6.3
36407-04###*
8A
73
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.
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.
For Mexico Market
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
TC2505
R & R Transfer Case Shift Actuator and
Install New Breather Hose
6.3
36407-04###*
8A
73
*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.
APPLICABLE WARRANTY
This repair is covered under the Toyota Basic Warranty. This warranty is in effect for 36 months
or 60,000 kilometers, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2025 Toyota Motor Sales, USA
T-SB-0093-25
December 17, 2025
Page 4 of 10
Flashing 4WD Lights and MIL ON with DTC P277111, P178462 and/or P17AC62
Parts Information
PART NUMBER
TRANSMISSION
PART NAME
QTY
Hose Sub-Assy, Transfer Breather
1
36410-04010
Actuator Assy, Transfer Shift
1
90430-18008
Gasket, Drain Plug
2
90520-13002
Ring, Shaft Snap
4
90311-41017
Seal, Type T Oil (for Front Comp. Flange)
1
36105-04010
Housing Sub-Assy, Transfer Ext with Seal
1
90301-31003
Ring, O (for Transfer Output Shaft)
1
90179-24011
1
90179-22016
Nut (for Transfer Output Shaft
Companion Flange)
00295-01281
Toyota Genuine Seal Packing 1281
As
Needed
08885-01806
Transfer Gear Oil LF
As
Needed
PREVIOUS
NEW
Manual
36407-04090
36407-04110
36407-04111
Automatic
36407-04090
36407-04120
36407-04121
Hybrid
36407-04130
36407-04131
*
*Use vehicle VIN # to confirm the parts needed for the Repair Procedure.
© 2025 Toyota Motor Sales, USA
1
T-SB-0093-25
December 17, 2025
Page 5 of 10
Flashing 4WD Lights and MIL ON with DTC P277111, P178462 and/or P17AC62
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Companion Flange Holding Tool*
09330-00021
1
Universal Puller Set “B”*
09950-40011
1
Hanger*
09951-04010
1
Slide Arm*
09952-04010
1
Center Bolt 200*
09953-04030
1
Arm 25*
09954-04010
1
Claw No. 3*
09955-04031
1
Attachment*
09957-04010
1
Hanger 200*
09951-04020
1
Holder*
09958-04011
1
Bearing Replacer Set #1*
09950-60011
1
Replacer 65*
09951-00650
1
Adapter*
09952-06010
1
Handle Set*
09950-70010
1
Handle Assembly - 6.25”*
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