Hybrid System - MIL ON/DTC P314A/828 Set

L-SB-0062-12

July 19, 2012

MIL "ON" DTC P314A / 828

Service Category
Engine/Hybrid System

Section
Hybrid/Battery Control System

Market
USA





Applicability

Introduction

Some 2010 - 2012 model year RX 450h vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P314A, information code 828 (Inverter Coolant Pump Speed Signal), stored in the Power Management Control ECU (HV ECU). Use the following repair procedure to address this condition.

Production Change Information





This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs shown.





Warranty Information

APPLICABLE WARRANTY





Parts Information





Required Tools & Equipment

Repair Procedure

1. Using TIS Techstream, confirm that Diagnostic Trouble Code (DTC) P314A, information code 828 (Inverter Coolant Pump Speed Signal), is present.

2. If DTC P314A, information code 828 is present, check the INV W/P fuse for loose fitting in the Engine Room Relay Block No. 2.

Is the INV W/P fuse loose?

^ YES - Continue to step 3.

^ NO - This bulletin does NOT apply. Refer to the Repair Manual for continued diagnostics.

Refer to the Technical Information System (TIS), applicable model and model year Repair Manual:

^ 2010 (to 08/2009) / 2010 (from 08/2009) 2011 / 2012 RX 450h:
Engine/Hybrid System - Hybrid/Battery Control System - "Hybrid / Battery Control: Hybrid Control System: P314A-828: Inverter Coolant Pump Speed Signal"

3. If the INV W/P fuse is loose, replace the Engine Room Relay Block No. 2.

CAUTION
Be sure to disconnect the 12V auxiliary battery prior to removing the pins from the Engine Room Relay Block No. 2.

4. Clear DTCs.

5. Test drive the vehicle to confirm the condition has been corrected.

© 2012 Lexus, a division of Toyota Motor Sales, USA