Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSLEXUS2006RX 400H AWD V6-3.3L (3MZ-FE) HYBRIDREPAIR AND DIAGNOSISHYBRID DRIVE SYSTEMSPOWER CONTROL SYSTEMTECHNICAL SERVICE BULLETINSALL TECHNICAL SERVICE BULLETINSHYBRID SYSTEMS - MIL ON/DTC P0A78/INFO CODES 286/287
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
Hybrid Systems - MIL ON/DTC P0A78/Info Codes 286/287
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION Hybrid Systems - MIL ON/DTC P0A78/Info Codes 286/287
L-SB-0168-08
December 16, 2008
M.I.L. "ON" DTC P0A78 with Information Codes 286, 287
Service Category
Engine/Hybrid System
Section
Hybrid/Battery Control System
Market
USA
Applicability
Introduction
Some customers with 2006 2008 model year RX 400h vehicles may experience a M.I.L. "ON" condition with DTC P0A78 with information codes 286 and/or 287 (Drive Motor A Inverter Performance). The inverter with converter assembly has been improved to address this condition.
NOTE
This TSIB applies ONLY if information codes 286 AND/OR 287 are present.
Production Change Information
This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Lexus Hybrid System Warranty. This warranty is in effect for 96 months or 100,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required Tools & Equipment
NOTE
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
NOTE
Additional SSTs may be ordered by calling SPX/OTC.
Repair Procedure
Remove and replace the inverter with converter assembly.
Refer to the Technical Information System (TIS), applicable model year RX400h Repair Manual:
^ 2006 RX 400h:
Engine/Hybrid System Hybrid/Battery Control System "Inverter with Converter: Removal / Installation"
^ 2007 RX 400h:
Engine/Hybrid System Hybrid/Battery Control System "Inverter with Converter: Removal / Installation"
^ 2008 RX 400h:
Power Source/Network Battery/Charging "Inverter with Converter: Removal / Installation"
December 16, 2008
M.I.L. "ON" DTC P0A78 with Information Codes 286, 287
Service Category
Engine/Hybrid System
Section
Hybrid/Battery Control System
Market
USA
Applicability
Introduction
Some customers with 2006 2008 model year RX 400h vehicles may experience a M.I.L. "ON" condition with DTC P0A78 with information codes 286 and/or 287 (Drive Motor A Inverter Performance). The inverter with converter assembly has been improved to address this condition.
NOTE
This TSIB applies ONLY if information codes 286 AND/OR 287 are present.
Production Change Information
This TSIB applies to vehicles produced BEFORE the Production Change Effective VINs shown.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Lexus Hybrid System Warranty. This warranty is in effect for 96 months or 100,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Parts Information
Required Tools & Equipment
NOTE
Additional TIS Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
NOTE
Additional SSTs may be ordered by calling SPX/OTC.
Repair Procedure
Remove and replace the inverter with converter assembly.
Refer to the Technical Information System (TIS), applicable model year RX400h Repair Manual:
^ 2006 RX 400h:
Engine/Hybrid System Hybrid/Battery Control System "Inverter with Converter: Removal / Installation"
^ 2007 RX 400h:
Engine/Hybrid System Hybrid/Battery Control System "Inverter with Converter: Removal / Installation"
^ 2008 RX 400h:
Power Source/Network Battery/Charging "Inverter with Converter: Removal / Installation"
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.