NHTSA ID Number: 10171592
Manufacturer Communication Number: T-SB-0001-20
TSB/Document Date: 2020-02-24
Summary
TSB: Some 2019 model year Tacoma vehicles may exhibit a Blind Spot Monitor System warning message with any of the following Diagnostic Trouble Codes (DTCs) present. ? C1AC1 ? Master Module Horizontal Axis Misalignment ? C1AC2 ? Slave Module Horizontal Axis Misalignment. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0001-20
January 6, 2020
Blind Spot Monitor DTC C1AC1 or C1AC2
Service
Category
Audio/Visual/Telematics
Section
Park Assist/Monitoring
Market USA
Applicability
YEAR(S)
MODEL(S)
2019
Tacoma
ADDITIONAL INFORMATION
Introduction
Some 2019 model year Tacoma vehicles may exhibit a Blind Spot Monitor System warning
message with any of the following Diagnostic Trouble Codes (DTCs) present.
C1AC1 – Master Module Horizontal Axis Misalignment
C1AC2 – Slave Module Horizontal Axis Misalignment
Follow the Repair Procedure in this bulletin to address this condition.
© 2020 Toyota
Motor Sales, USA
Page 1 of 5
T-SB-0001-20
January 6, 2020
Page 2 of 5
Blind Spot Monitor DTC C1AC1 or C1AC2
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
DRIVETRAIN
ENGINE
PRODUCTION CHANGE EFFECTIVE VIN
5TFRX5GN#KX163329
2TR
5TFAX5GN#KX163330
5TFAZ5CN#KX087107
2WD
5TFBZ5DN#KX004926
2GR
5TFEZ5CN#KX087126
TMMTX
5TFRZ5CN#KX087102
2TR
5TFSX5EN#KX070691
5TFCZ5AN#KX210055
Tacoma
4WD
5TFSZ5AN#KX210060
5TFDZ5BN#KX046408
5TFGZ5AN#KX210201
3TMAZ5CN#KM113871
2GR
2WD
3TMBZ5DN#KM023284
3TMEZ5CN#LM114685
TMMBC
3TMCZ5AN#KM285777
4WD
3TMGZ5AN#KM285795
3TMDZ5BN#KM079287
NOTE
The plant is determined by the 11th letter of the production change effective VIN. (Ex. X=TMMTX M=TMMBC)
© 2020 Toyota Motor Sales, USA
T-SB-0001-20
January 6, 2020
Page 3 of 5
Blind Spot Monitor DTC C1AC1 or C1AC2
Warranty Information
OP Code
DESCRIPTION
TIME
OFP
T1
T2
EL1921
Replace Blind Spot Monitor (Both Sides)
3.0
88162-04014
8B
74
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
88162-04014
88162-04015
PART NAME
QTY
Sensor, Blind Spot Monitor
2
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Laser Radar Adjusting Reflector*
09870-60000
1
Reflector C*
09870-60040-02
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVi*
QTY
TSADVUNIT
Techstream 2.0
Techstream Lite
PART NUMBER
TS2UNIT
ADE
Techstream Lite (Green Cable)
TSLITEPDLR01
TSLP2DLR01
*Essential SST.
NOTE
ONLY ONE of the Techstream units listed above is required.
Software version 14.20.019 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
© 2020 Toyota Motor Sales, USA
1
T-SB-0001-20
January 6, 2020
Page 4 of 5
Blind Spot Monitor DTC C1AC1 or C1AC2
Repair Procedure
1. Using Techstream, check for the following stored DTCs.
C1AC1 – Master Module Horizontal Axis Misalignment
C1AC2 – Slave Module Horizontal Axis Misalignment
Are ANY of the DTCs listed above present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Remove the rear bumper assembly.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”
3. Replace both Blind Spot Monitor sensors.
A. Remove the blind spot monitor
sensors.
Figure 1.
Refer to TIS, applicable model and
model year Repair Manual:
2019 Tacoma:
Audio/Visual/Telematics – Park
Assist/Monitoring – “Park
Assist/Monitoring: Blind Spot
Monitor Sensor: Removal”
2
B. Install the NEW Blind Spot Monitor
sensors with the three nuts.
1
NOTE
Torque nuts to 9.0 N*m
(92 kgf*cm, 80 in*lbf)
1
Blind Spot Monitor Sensor LH (Master)
2
Blind Spot Monitor Sensor RH (Slave)
© 2020 Toyota Motor Sales, USA
T-SB-0001-20
January 6, 2020
Page 5 of 5
Blind Spot Monitor DTC C1AC1 or C1AC2
Repair Procedure (continued)
4. Temporarily install the bumper onto the vehicle.
HINT
The bumper MUST be installed without extension housings covering the Blind Spot Monitor sensor.
This will allow completion of the blind spot monitor installation condition inspection section of the
operation check.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”
5. Perform the Blind Spot Monitor System Operation Check.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Audio/Visual/Telematics – Park Assist/Monitoring – “Park Assist / Monitoring: Blind Spot
Monitor System: Operation Check”
6. Remove the rear bumper assembly.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”
7. Reassemble the rear bumper assembly.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Reassembly”
8. Install the bumper onto the vehicle.
Refer to TIS, applicable model and model year Repair Manual:
2019 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”
9. Clear ANY DTCs with Techstream.
10. Confirm proper operation of the Blind Spot Monitor system.
© 2020 Toyota Motor Sales, USA
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TSB/Document ID: T-SB-0001-20
Replacement Service Bulletin Number:
MFR Communication Date: 2020-01-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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