Hybrid Systems - MIL ON/DTC P07AF Set
L-SB-0147-10October 25, 2010
MIL "ON" DTC POA7F
Service Category
Engine/Hybrid System
Section
Hybrid/Battery Control System
Market
USA
Applicability
Introduction
Some 2007 - 2010 model year GS 450h vehicles may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P0A7F (Hybrid Battery Pack Deterioration) stored. Use the following repair procedure to address this condition.
Calibration Information
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Lexus Hybrid System Vehicle Component 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 occurrence of the specified condition described in this bulletin.
Parts Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream confirm DTC P0A7F is present.
2. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm the HV ECU calibration has been updated. If the calibration ID listed is NOT the latest HV ECU calibration go to step 3 and follow the repair procedure outlined in this TSIB.
NOTE
If the HV ECU already contains the latest calibration ID, this TSIB does NOT apply.
3. Replace the HV battery.
Refer to the Technical Information System (TIS) applicable model year GS 450h Repair Manual:
^ 2007 / 2008 / 2009 / 2010 GS 450h:
Engine/Hybrid System - Hybrid/Battery Control System - "Hybrid Battery Control:
HV Battery: Removal"
^ 2007 / 2008 / 2009 / 2010 GS 450h:
Engine/Hybrid System - Hybrid/Battery Control System - "Hybrid Battery Control:
HV Battery: Installation"
4. Inspect and adjust the automatic air intake control setting.
Press and hold the Outside Air I Recirculated Mode button on the HVAC unit until the smog sensor screen appears.
5. Set the sensitivity level to 2 steps to the left of Medium.
6. Flash Reprogram the HV ECU.
NOTE
^ The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
^ For details on how to use the GR8 Battery Diagnostic Station, refer to the located on the Technical Information System (TIS), Diagnostics Battery.
Follow the procedures outlined in TSIB No.L-SB-0015-10, "Techstream ECU Flash Reprogramming Procedure� and flash the ECM (PCM) with the NEW calibration file update.
7. Install the Authorized Modifications Label.
A. Using a permanent marker enter the following information on the label:
^ HV ECU part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
^ Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
^ Dealer Code
^ Repair Date
^ Change Authority [This TSIB 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-OOOO1-LBL.
8. Clear any DTCs then start the engine and warm it up to normal operating temperature. Test drive the vehicle to confirm normal operation.