NHTSA ID Number: 10173801
Manufacturer Communication Number: L-SB-0006-20
TSB/Document Date: 2020-04-13
Summary
TSB: Some 2019 ? 2020 model year ES 300h UX 250h vehicles may exhibit a MIL ON condition with a ?Hybrid
System Malfunction? message displayed and one or more of the following DTC(s) that represent an over current between the MG1, MG2, and inverter/PCU: ?P1C5D19 ? Drive Motor "A" Inverter Circuit Current Above Threshold ?P1C5F19 ? Generator Inverter Circuit Current Above Threshold These conditions typically occur on low vehicle mileage (less than 5,000). After an occurrence, the vehicle will be able to run normally with no drivability issues. Follow the Repair Procedure in this bulletin to address these conditions.
L-SB-0006-20
March 10, 2020
MIL ON With DTC(s) P1C5F19 and/or P1C5D19 Causing
Over-current Condition
Service
Category
Vehicle Interior
Section
Meter/Gauge/Display
Market USA
Applicability
YEAR(S)
MODEL(S)
2019 - 2020
ES300H, UX250H
ADDITIONAL INFORMATION
Introduction
Some 2019 – 2020 model year ES 300h UX 250h vehicles may exhibit a MIL ON condition with a
“Hybrid System Malfunction” message displayed and one or more of the following DTC(s) that
represent an over current between the MG1, MG2, and inverter/PCU:
P1C5D19 – Drive Motor "A" Inverter Circuit Current Above Threshold
P1C5F19 – Generator Inverter Circuit Current Above Threshold
These conditions typically occur on low vehicle mileage (less than 5,000). After an occurrence,
the vehicle will be able to run normally with no drivability issues. Follow the Repair Procedure in
this bulletin to address these conditions.
Figure 1. View of Terminals at the Inverter
Figure 2. Close-Up View of Terminal
1
1
0
1
Close-Up View of Terminal (See Figure 2)
1
Debris Created From Bolt Tightening
© 2020 Lexus, a division of Toyota Motor Sales, USA
Page 1 of 4
L-SB-0006-20
March 10, 2020
Page 2 of 4
MIL ON With DTC(s) P1C5F19 and/or P1C5D19 Causing Over-current Condition
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
PRODUCTION CHANGE EFFECTIVE VIN
ES 300h
TMMK
58AE21B1#LU007834
58AF21B1#LU007834
58AD21B1#LU007834
TMK
JTHX9JBH#L2026066
JTHL9JBH#L2026066
JTHR9JBH#L2026066
UX 250h
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL1929
R & R Bolts for Motor Cable
2.0
91671-80612
90119-A0182
8A
73
APPLICABLE WARRANTY
This repair is covered under the Lexus Basic Warranty. This warranty is in effect for 48 months
or 50,000 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
MODEL
PART NUMBER
PREVIOUS
NEW
ES 300h
91671-80612
90119-A0182
90119-06A57
UX 250h
91671-80612
All
PART NAME
QTY
8
Cap, Terminal
1
82823-47040
© 2020 Lexus, a division of Toyota Motor Sales, USA
L-SB-0006-20
March 10, 2020
Page 3 of 4
MIL ON With DTC(s) P1C5F19 and/or P1C5D19 Causing Over-current Condition
Required Tools & Equipment
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 14.30.022 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
Repair Procedure
1. Run a Health Check to confirm the condition exists.
Does the vehicle exhibit a MIL ON condition with a “Hybrid System Malfunction” message
displayed and DTC(s) P1C5D19 and/or DTC P1C5F19 present?
YES — Continue to step 2.
NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
NOTE
This condition is for DTC(s) P1C5D19 and P1C5F19. If other Hybrid DTC codes exist, this bulletin
may NOT be applicable. Continue diagnosis using the applicable Repair Manual.
© 2020 Lexus, a division of Toyota Motor Sales, USA
1
L-SB-0006-20
March 10, 2020
Page 4 of 4
MIL ON With DTC(s) P1C5F19 and/or P1C5D19 Causing Over-current Condition
Repair Procedure (continued)
2. Remove the MG cable.
NOTE
The bolts from the inverter may be reused.
Refer to TIS, applicable model and model year Repair Manual:
2019 – 2020 ES 300h:
Drivetrain – Hybrid Transmission/Transaxle – “P710 (Hybrid Transmission / Transaxle):
Motor Cable: Removal”
2019 – 2020 UX 250h:
Drivetrain – Hybrid Transmission/Transaxle – “P711 (Hybrid Transmission / Transaxle):
Motor Cable: Removal”
3. Using compressed air, blow out ALL potential debris on the terminals and connections area of
the inverter and transaxle. Visually confirm there is no debris present on terminals and
connections area.
4. Reinstall the MG cable with NEW bolts into the transaxle assembly. Inverter bolts can be
reused. Refer to TIS, applicable model and model year Repair Manual:
2019 – 2020 ES 300h:
Drivetrain – Hybrid Transmission/Transaxle – “P710 (Hybrid Transmission / Transaxle):
Motor Cable: Installation”
2019 – 2020 UX 250h:
Drivetrain – Hybrid Transmission/Transaxle – “P711 (Hybrid Transmission / Transaxle):
Motor Cable: Installation”
NOTE
Ensure correct fastening tools and torque are used when installing the MG cable. Over tightening
can create additional debris.
5. Clear codes and test-drive the vehicle to ensure the conditions no longer exists.
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TSB/Document ID: L-SB-0006-20
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-10
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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