T-SB-0063-19

T-SB-0063-19
May 13, 2019
Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2,
C1AB6, or C1AB7
Service
Category
Audio/Visual/Telematics
Section
Park Assist/Monitoring
Market USA
Applicability
YEAR(S)
MODEL(S)
2016 - 2018
Tacoma
ADDITIONAL INFORMATION
Introduction
Some 2016 – 2018 model year Tacoma vehicles may exhibit a Blind Spot Monitor System
Warning message with any of the following Diagnostic Trouble Codes (DTCs) present.

U0232 – Lost Communication with Blind Spot Monitor Slave Module

U0233 – Lost Communication with Blind Spot Monitor Master Module

C1AC1 – Master Module Horizontal Axis Misalignment

C1AC2 – Slave Module Horizontal Axis Misalignment

C1AB6 – Blind Spot Monitor Master Module

C1AB7 – Blind Spot Monitor Slave Module
Follow the Repair Procedure in this bulletin to address this condition.
© 2019 Toyota Motor Sales, USA
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May 13, 2019
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
5TFRX5GN#JX111252
5TFRZ5CN#JX059865
2WD
5TFAZ5CN#JX059864
5TFBZ5DN#JX003961
5TFEZ5CN#JX059933
TMMTX
5TFAX5GN#JX111258
5TFSX5EN#JX059373
4WD
Tacoma
5TFCZ5AN#JX135529
5TFSZ5AN#JX135530
5TFDZ5BN#JX032587
3TMAZ5CN#JM058771
2WD
3TMBZ5DN#JM013475
3TMEZ5CN#JM058764
TMMBC
3TMCZ5AN#JM137643
4WD
3TMGZ5AN#JM137733
3TMDZ5BN#JM040666
NOTE
The plant is determined by the 11 th letter of the production change effective VIN. (Ex. X=TMMTX M=TMMBC)
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL1817
Replace Blind Spot Monitor (Both Sides)
3.0
88162-04010
88162-04011
88162-04012
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.
© 2019 Toyota Motor Sales, USA
T-SB-0063-19
May 13, 2019
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Parts Information
PART NUMBER
PREVIOUS
NEW
88162-04010
88162-04011
88162-04012
88162-04013
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 2.0*
Techstream Lite
PART NUMBER
QTY
TS2UNIT
ADE
Techstream Lite (Green Cable)
TSLITEPDLR01
TSLP2DLR01
*Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 14.10.028 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
© 2019 Toyota Motor Sales, USA
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Repair Procedure
1. Confirm the condition exists.
Using Techstream, check for the following stored DTCs.
 U0232 – Lost Communication with Blind Spot Monitor Slave Module
 U0233 – Lost Communication with Blind Spot Monitor Master Module
 C1AC1 – Master Module Horizontal Axis Misalignment
 C1AC2 – Slave Module Horizontal Axis Misalignment
 C1AB6 – Blind Spot Monitor Master Module
 C1AB7 – Blind Spot Monitor Slave Module
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:

2016 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”

2017 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”

2018 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”
© 2019 Toyota Motor Sales, USA
T-SB-0063-19
May 13, 2019
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Repair Procedure (continued)
3. Replace both blind spot monitor sensors.
A. Remove the blind spot monitor sensor.
Refer to TIS, applicable model and
model year Repair Manual:

Figure 1.
2016 / 2017 / 2018 Tacoma:
Audio/Visual/Telematics –
Park Assist/Monitoring –
“Park Assist/Monitoring: Blind Spot
Monitor Sensor Removal”
B. Install the blind spot monitor sensor
with the three nuts.
2
Torque: 9.0 N*m (92 kgf*cm, 80 in*lbf)
1
1
Blind Spot Monitor Sensor LH (Master)
2
Blind Spot Monitor Sensor RH (Slave)
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:
 2016 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”

2017 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”

2018 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”
© 2019 Toyota Motor Sales, USA
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May 13, 2019
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Repair Procedure (continued)
5. Perform the blind spot monitor system operation check.
Refer to TIS, applicable model and model year Repair Manual:

2016 / 2017 / 2018 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:

2016 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”

2017 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Removal”

2018 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:

2016 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Reassembly”

2017 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Reassembly”

2018 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Reassembly”
© 2019 Toyota Motor Sales, USA
T-SB-0063-19
May 13, 2019
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Blind Spot Monitor DTC U0232, U0233, C1AC1, C1AC2, C1AB6, or C1AB7
Repair Procedure (continued)
8. Install the bumper onto the vehicle.
Refer to TIS, applicable model and model year Repair Manual:

2016 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”

2017 Tacoma:
Vehicle Exterior – Exterior Panels/Trim – “Exterior: Rear Bumper
(w/ Towing Package) / (w/o Towing Package): Installation”

2018 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.
© 2019 Toyota Motor Sales, USA