S-SB-0018-17

August 14, 2017

DTC U0323/U0423/U3000 Cannot be Deleted
Service
Category

Audio/Visual/Telematics

Section

Navigation/Multi Info Display

Market USA

Applicability
YEAR(S)

MODEL(S)

2016

iA

ADDITIONAL INFORMATION

Introduction

Some 2016 model year iA vehicles may exhibit Diagnostic Trouble Codes (DTCs) U0323
(PCM Software Incompatibility with Instrument Panel Control Module), U0423 (ABS Invalid Data
Received from Instrument Panel Cluster Control Module), or U3000 (IC Control Module Internal
Electronic Failure) if the vehicle’s battery or the multimedia display is disconnected. Follow the
Repair Procedure in this bulletin to address this condition.

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

N/A

Not Applicable to Warranty

–

–

–

–

Required Tools & Equipment
REQUIRED EQUIPMENT

SUPPLIER

Techstream 2.0*
Techstream Lite

PART NUMBER

QTY

TS2UNIT
ADE

Techstream Lite (Green Cable)

TSLITEPDLR01

1

TSLP2DLR01

* Essential SST.

NOTE
Only ONE of the Techstream units listed above is required.
Software version 12.10.018 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.

© 2017 Toyota Motor Sales, USA

Page 1 of 5

S-SB-0018-17

August 14, 2017

Page 2 of 5

DTC U0323/U0423/U3000 Cannot be Deleted
Repair Procedure

The Tire Pressure Monitor System (TPMS) warning light flashes and/or the Traction Control
System/Dynamic Stability Control (TCS/DSC) indicator lights will illuminate. The DTCs CANNOT
be deleted if the DTC occurs when the ignition is turned to the OFF position within 20 seconds of
turning the ignition ON, and the ROOM fuse (engine compartment) is NOT installed when the
battery level is low, and/or the navigation receiver is disconnected.
1. Confirm the condition.
Using Techsteam, perform a Health Check. Was DTC U0323, U04423, or U3000 retrieved?


YES — Continue to step 2.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

2. Using Techstream, clear the DTCs.
3. Using Techstream, perform a Health Check. Was DTC U0323, U04423, or U3000 retrieved?


YES — Continue to step 4.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.

4. Verify that the navigation receiver and the
ROOM fuse are properly installed.

Figure 1. ROOM Fuse

A. Verify that the ROOM fuse is installed in
the Relay Block as shown.

2

1

1

Relay Block

2

ROOM Fuse Installation Location

© 2017 Toyota Motor Sales, USA

S-SB-0018-17

August 14, 2017

Page 3 of 5

DTC U0323/U0423/U3000 Cannot be Deleted
Repair Procedure (Continued)

B. Verify that the navigation receiver
connectors are properly seated.

Figure 2. Navigation Receiver

Access the navigation
receiver connectors.
Refer to the Technical Information
System (TIS), applicable model and
model year Repair Manual:

1

 2016 iA:
Audio/Visual/Telematics – Audio
Visual – “Audio/Video: Navigation
Receiver: Removal”
Are the navigation receiver connectors
properly seated?
 YES — Go to step 6.
 NO — Continue to step 5.

1

Connector

5. If the navigation receiver connectors are NOT properly seated, complete the
following procedure:
A. Properly seat the connectors.
B. Switch the ignition ON (engine OFF or ON) and wait 1 minute or more.
C. Switch the ignition OFF and wait for 3 seconds or more.
D. Switch the ignition ON (engine OFF or ON) and complete the navigation receiver
automatic configuration.
6. Reinstall the multimedia display, audio panel #1 and audio panel #2.
Refer to TIS, applicable model and model year Repair Manual:
 2016 iA:
Audio/Visual/Telematics – Audio Visual – “Audio/Video: Navigation Receiver: Installation”

© 2017 Toyota Motor Sales, USA

S-SB-0018-17

August 14, 2017

DTC U0323/U0423/U3000 Cannot be Deleted
Repair Procedure (Continued)

7. On the “Home” screen, press the rightmost
icon labeled Settings.

Figure 3.

8. In the “Settings” menu, press System.

Figure 4.

NOTE
The change to the “Settings” menu can be
made using either the Temp or Distance
submenu. If Distance is selected, go to
substep B.

A. In the “System” submenu, press Temp
and Select F° or C° to change the
temperature units. Choose the alternate
setting from the previously selected
measurement unit.

Figure 5.

© 2017 Toyota Motor Sales, USA

Page 4 of 5

S-SB-0018-17

August 14, 2017

Page 5 of 5

DTC U0323/U0423/U3000 Cannot be Deleted
Repair Procedure (Continued)

B. In the “System” submenu, press Distance
and select Miles or Km to change the
mileage units. Choose the alternate
setting from the previously selected
measurement unit.

Figure 6.

9. Turn the ignition key to the OFF position.
10. Turn the ignition key to the ON position and delete the DTCs using Techstream.
11. Confirm that the DTCs have been cleared using Techstream.
12. Return the original temperature and/or mileage units using the multimedia menu system.
13. Confirm that the DTCs do NOT reset.

© 2017 Toyota Motor Sales, USA