L-SB-0023-18

L-SB-0023-18
June 29, 2018
MIL "ON" DTC P3190 - Poor Engine Power at High
Altitude With High Temperatures
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2016 - 2018
RX450H
VDS(s): BGMCA, DGKCA, ZFMCA
Introduction
Some 2016 – 2018 model year RX 450h and 2018 model year RX 450h L vehicles may exhibit a
MIL “ON” condition with Diagnostic Trouble Code (DTC) P3190 (Poor Engine Power). This
condition may occur when operating the vehicle in high altitude and high temperature conditions.
The engine control module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been
modified to reduce the possibility of this condition occurring. Follow the Repair Procedure in this
bulletin to address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VIN
shown below.
MODEL
PLANT
RX 450h
TMMC
RX 450h L
TMK
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
2T2BGMCA#JC023992
All
2T2ZFMCA#JC023992
JTJDGKCA#J2003209
© 2018 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 6
L-SB-0023-18
June 29, 2018
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MIL "ON" DTC P3190 - Poor Engine Power at High Altitude With High
Temperatures
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1809
Reprogram ECM (PCM)
0.4
89661-#####
05
74
APPLICABLE WARRANTY
 This repair is covered under the Lexus Federal Emission Warranty. This warranty is in effect for
96 months or 80,000 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
89661-0EB10
89661-0EB11
00451-00001-LB L
PART NAME
QTY
Computer, Engine Control (ECM/PCM)
–
Authorized Modifications Labels
1
NOTE
 The ECM (PCM) should NOT be replaced as part of the Repair Procedure.
 Authorized Modifications Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily – Parts – Dealer Support Materials Orders.
© 2018 Lexus, a division of Toyota Motor Sales, USA
L-SB-0023-18
June 29, 2018
Page 3 of 6
MIL "ON" DTC P3190 - Poor Engine Power at High Altitude With High
Temperatures
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
PART NUMBER
Techstream 2.0*
QTY
TS2UNIT
Techstream Lite
ADE
TSLITEPDLR01
Techstream Lite (Green Cable)
1
TSLP2DLR01
* Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 13.10.019 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
 Use Techstream or an approved J2534 interface to perform flash reprogramming updates.
Visit techinfo.toyota.com for more information regarding J2534 reprogramming.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
GR8 Battery Diagnostic Station*
00002-MCGR8
1
* Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
Calibration Information
MODEL
MODEL YEAR
PLANT
CALIBRATION ID
PREVIOUS
NEW
348Q4000
2016
RX 450h
348Q4100
TMMC
2017
RX 450h L
2018
TMK
348Q4300
348Q4200
348N0000
348N0100
348V6000
348V6100
348T1000
348T1100
© 2018 Lexus, a division of Toyota Motor Sales, USA
L-SB-0023-18
June 29, 2018
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MIL "ON" DTC P3190 - Poor Engine Power at High Altitude With High
Temperatures
Repair Procedure
1. Using Techstream, check for the following stored DTC:
DTC P3190 (Poor Engine Power)
Is the DTC present?

YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Confirm the freeze frame data.
In the freeze frame data for P3190, is the low fuel pressure below 1875mmHg(abs)?
See the table below for an example.
Table 1. Example
PARAMETER
UNITS
-3
-2
-1
0
1
Low Fuel Pressure Sensor
mmHg(abs)
247.698
284.663
251.824
257.104
244.233

YES — Continue to step 3.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
3. Does the condition occur when operating the vehicle in high altitude and high
temperature conditions?
 YES — Continue to step 4.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
4. Is the fuel tank empty?
 YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
 NO — Continue to step 5.
© 2018 Lexus, a division of Toyota Motor Sales, USA
L-SB-0023-18
June 29, 2018
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MIL "ON" DTC P3190 - Poor Engine Power at High Altitude With High
Temperatures
Repair Procedure (continued)
5. Check for the Authorized Modifications Label affixed to the vehicle in the location shown
below. Confirm if the ECM (PCM) calibration has been updated.
Is the calibration ID listed the latest ECM (PCM) calibration?

YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NO — Continue to step 6.

Figure 1. Location of Authorized Modifications Label for 2016 – 2018 RX 450h
TOYOTA MOTOR CORPORATION
A UTHORIZE D
M OD IF IC A TIONS
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
1
2
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
3
DEALER CODE:
CHANGE AUTHORITY:
4
DATE:
5
1
Replacement ECM (PCM) Part Number
(e.g., 89661-0EB11)
4
Date Com pleted
2
New Calibration ID (e.g., 348Q4300)
5
This SB Num ber
3
Dealer Code
© 2018 Lexus, a division of Toyota Motor Sales, USA
L-SB-0023-18
June 29, 2018
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MIL "ON" DTC P3190 - Poor Engine Power at High Altitude With High
Temperatures
Repair Procedure (continued)
6. Flash reprogram the ECM (PCM).
NOTE
 The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery
voltage at 13.5V while flash reprogramming vehicle.
 For details on how to use the GR8 Battery Diagnostic Station, refer to the
“GR8 Instruction Manual” located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.
Follow the procedures outlined in Service Bulletin No. L-SB-0001-18 “Techstream ECU Flash
Reprogramming Procedure,” and flash the ECM (PCM) with the NEW calibration file update.
7. Prepare and install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
 ECM (PCM) part number [Refer to the Parts Information section for the NEW
PART NUMBER]
 Calibration ID(s) [Refer to the Calibration Information section for the NEW
CALIBRATION ID]
 Dealer Code
 Repair Date
 Change Authority [This bulletin number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1.
The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
8. Perform a Health Check to confirm that the calibration ID was successfully updated.
9. Ready the vehicle ON, warm it up to normal operating temperature, and test drive to confirm
proper vehicle operation.
© 2018 Lexus, a division of Toyota Motor Sales, USA