O2 Sensor Readiness Monitor Does Not Complete (L-SB-0027-15)

O2 SENSOR READINESS MONITOR DOES NOT COMPLETE

TECHNICAL SERVICE BULLETIN

APPLICABILITY

YEAR(S)	MODEL(S)	ADDITIONAL INFORMATION
2007	RX400H

INTRODUCTION

Some 2007 model year RX 400h vehicles may exhibit a condition of oxygen sensor readiness monitors incomplete during state emissions testing. The Hybrid Vehicle (HV) ECU logic has been updated to address this condition.

PRODUCTION CHANGE INFORMATION

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

MODEL	DRIVETRAIN	PRODUCTION CHANGE EFFECTIVE VIN
RX 400h	2WD	JTJGW31U#72003519
	4WD	JTJHW31U#72020196

WARRANTY INFORMATION

OP CODE	DESCRIPTION	TIME	OFP	T1	T2
EG1502	Reprogram HV ECU and ECM (PCM)	0.8	89981-#####	99	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

MODEL YEAR	DRIVETRAIN	OIL COOLER	PART NUMBER		PART NAME	QTY
			PREVIOUS	NEW
2007	2WD	With	89981-48160 89981-48161	89981-48162 89981-48163	Computer, Hybrid Vehicle Control	-
		Without	89981-48180 89981-48181	89981-48182 89981-48183
	4WD	With	89981-48190 89981-48191	89981-48192 89981-48193
		Without	89981-48200 89981-48201	89981-48202 89981-48203
All	All	All	00451-00001-LBL		Authorized Modification Labels	1

REQUIRED TOOLS & EQUIPMENT

REQUIRED EQUIPMENT	SUPPLIER	PART NUMBER	QTY
Techstream 2.0(1)	ADE	TS2UNIT	1
Techstream Lite		TSLITEPDLR01
(1) Essential SST.

SPECIAL SERVICE TOOLS (SST)	PART NUMBER	QTY
GR8 Battery Diagnostic Station(1)	00002-MCGR8	1
(1) Essential SST.

CALIBRATION ID INFORMATION

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CALIBRATION INFORMATION

MODEL YEAR	DRIVETRAIN	OIL COOLER	ECM (CPU)/ECU	CALIBRATION ID
				PREVIOUS	NEW
2007	2WD	With	Main	348A0000	348A0100/899834813100
			Sub	899834813000
		Without	Main	348A0000	348A0100/899834814100
			Sub	899834814000
	4WD	With	Main	348A0000	348A0100/899834815100
			Sub	899834815000
		Without	Main	348A0000	348A0100/899834816100
			Sub	899834816000

REPAIR PROCEDURE

1. Prepare the vehicle for reflash.
   NOTE: This procedure will pressurize the brake actuator and prevent the ABS pump from running during the reflash procedure.
   1. Prior to vehicle shut down perform the following steps:
      • Place the vehicle in the ready on position.
      • Place the transaxle in the P range.
      • Engage parking brake.
   2. Depress the brake pedal fully 2 times within 2 seconds.
   3. Release brake pedal.
   4. Wait 10 seconds.
   5. Turn off the vehicle.
2. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 2. Confirm if the HV ECU and ECM (PCM) calibrations have been updated. If the calibration IDs are NOT the new calibrations - go to step 2.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

3. Flash Reprogram the HV ECU and the ECM (PCM).
   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 GR8 Instruction Manual  located on the Technical Information System (TIS), Diagnostics - Tools & Equipment - Battery Diagnostics  .

   Follow the procedures outlined in Service Bulletin No. L-SB-0021-14  , "Techstream ECU Flash Reprogramming Procedure,"  and flash the ECM (PCM) with the NEW calibration file update.

   NOTE:

   • Anytime the HV ECU is reprogrammed, the engine ECM (PCM) MUST also be reprogrammed, even if the engine ECM (PCM) has the "New Calibration ID."
   • If ONLY the engine ECM (PCM) Calibration ID matches the "Current Calibration ID" shown in the CALIBRATION INFORMATION  section in this bulletin, proceed with flash reprogramming.
   • If BOTH the engine ECM (PCM) and HV ECU Calibration IDs match the "New" calibration IDs shown in the CALIBRATION INFORMATION  section, this vehicle has already been reprogrammed. Refer to TIS for diagnostic procedures applicable to any stored DTCs.
4. Start the engine and warm it up to normal operating temperature before test driving.
5. Test drive the vehicle to confirm proper vehicle operation (and proper laser cruise control operation, if equipped).
6. Confirm that the O2 Sensor monitor reads complete.
7. Install the Authorized Modifications Label.
   1. Using a permanent marker, enter the following information on the label:
      • ECM 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] 
   2. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 2. The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
8. Calibration update is complete.
   NOTE: The effect of the NEW calibration may become more apparent after several days of driving as the ECM (PCM) "learned values" are re-established from the customer's driving.