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Some 2004 – 2009 model year Highlander, 2001 – 2005 model year RAV4, and 2004 – 2010 model year Sienna AWD (4WD) vehicles may display a transmission ?uid or gear oil seepage from a vent on the right side of the transfer case. The seepage is from the transfer RH (right-hand) bearing retainer No. 2 oil seal. Production improvements have been implemented to prevent this condition from occurring. Follow the repair procedure in this bulletin to replace the RH bearing retainer No. 2 oil seal assembly. Transmission Fluid or Gear Oil Seepage from Transfer Case Vent (AWD) Repair Procedure: Removal 1. Con?rm source of gear oil/transmission ?uid seepage is from vent on RH bearing retainer. 2. Remove the engine assembly with transaxle. Refer to the Technical Information System (TIS), applicable model and model year Repair Manual: • 2004 Highlander: Engine/Hybrid System – Engine Mechanical – “2AZ-FE / 3MZ-FE: Partial Engine Assy: Replacement” • 2005 Highlander: Engine/Hybrid System – Engine Mechanical – “2AZ-FE / 3MZ-FE: Partial Engine Assy: Replacement” • 2006 Highlander: Engine/Hybrid System – Engine Mechanical – “2AZ-FE / 3MZ-FE Engine Mechanical: Engine Assembly: Removal” • 2007 Highlander: Engine/Hybrid System – Engine Mechanical – “2AZ-FE / 3MZ-FE Engine Mechanical: Engine Assembly: Removal” • 2008 / 2009 Highlander: Engine/Hybrid System – Engine Mechanical – “ 2GR-FE Engine Mechanical: Engine Assembly: Removal” 3. Remove the automatic transmission w/transfer. Refer to TIS, applicable model and model year Repair Manual: • 2004 Highlander: Drivetrain – Automatic Transmission/Transaxle – “Automatic Transaxle Assy (U151E/U151F) / (U241E/U140F): Replacement” • 2005 Highlander: Drivetrain – Automatic Transmission/Transaxle – “Automatic Transaxle Assy (U151E/U151F) / (U241E/U140F): Replacement” • 2006 Highlander: Drivetrain – Automatic Transmission/Transaxle – “U140F / U151F Automatic Transaxle: Automatic Transaxle Assembly: Removal” 4. Remove the transfer case No. 1 plug and remove the gasket from the plug. 5. Remove the transfer drain plug and remove the gasket from the drain plug. 6. Remove the transfer assembly. A. Remove the 2 bolts and 6 nuts. B. Using a plastic hammer, drive out the transfer assembly from the transaxle assembly. NOTICE • Disconnect the transfer assembly from the transaxle assembly without tilting. • When moving the transfer assembly, do NOT hold the assembly by the oil seals.

Check the following wire connection for open circuit according to wiring diagram:Relay carrier in E-box, plenum chamber, position 3Terminal Harness connector atignition coils Terminal 8 1 Specified value: Wire resistance max 1.5 – If necessary, repair wire connection. Audi A4 Sedan 2002-2004, Audi A4 Avant 2002-2004, Audi A4 Cabriolet 2003-2004 – 1.8 Liter 4-Cyl. 5V Turbo Generic Scan Tool, Engi…Page 5 24-158 If no malfunctions are found in wires: – Check voltage supply of Motronic Engine Control Module (ECM) voltage supply relay – J271 – Page 24-158 . – Check activation of Motronic Engine Control
Module (ECM) voltage supply relay – J271 – Page 24-159 . Checking voltage supply If specified value is not obtained:
- Connect multimeter for voltage measurement as follows. Relay carrier in E-box, plenum chamber, position 3
Terminal

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Some 1999-2004 Navigator, 2002-2003 Blackwood, 2003-2005 Aviator, 2003-2004 Marauder and 2003-2004 Mustang vehicles built before 12/19/2004 equipped with 4.6L 4V/5.4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316. ACTION Diagnose engine for engine misfire concern. If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only replace the affected cylinder head(s). SERVICE PROCEDURE

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1. At the crank position sensor, check for battery voltage to be present on the Red wire with the key on and cranking. The Black wire should be a good ground and the Blue wire should have 5 volts on it from the computer. One may have to disconnect the crank sensor to check for the 5 volt reference. 2. During crank look for a good 5 volt square wave signal on the Blue wire. 3. Check at the ignition coils for good battery voltage key on and cranking. If there is a loss of voltage during crank check the ignition failsafe relay. 4. Check for any stored engine codes. Crankshaft Position (CKP) Sensor Ignition Failsafe Sensor The ignition failsafe sensor supplies battery voltage to the ignition coils. The ignition coils can look like they have good battery voltage key on but during crank the ignition failsafe relay can stop sending voltage to the ignition coils.

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Introduction The following information is intended to clarify the repair manual procedures for Zero Point Calibration and sensor checks after the replacement of any of the following components or procedures. S Vehicle Stability Control Computer S Steering Angle Sensor S Yaw Rate Sensor S Deceleration Sensor S After Performing an Alignment Zero Point Calibration of the above sensors must also be performed when replacing or repairing steering related parts. These steps are necessary for the correct and accurate repair of VSC related systems. Applicable Vehicles S All 2004 model year Lexus vehicles equipped with VSC.