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Some customers may complain of excessive sulfur odor on 2006 model year Tacoma vehicles equipped with the 1GR–FE (V6) engine under the following conditions: S Stop and go driving S Heavy acceleration In order to reduce the sulfur odor, new catalytic converter assemblies have been made available. Follow the repair procedure to replace the catalytic converter assemblies. NOTE: For more complete understanding of the root cause, refer to TSB No. EG003–03, “Sulfur Odor from Exhaust.” Repair Procedure Refer to the Technical Information System (TIS): 2006 model year Tacoma Repair Manual: Exhaust: Exhaust Pipe Assy (1GR–FE).

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General Precautions (Cont’d) After disconnecting vacuum or air hoses, attach a tag to indicate the proper connection. • Use only the fluids and the lubricants specified in MA sec- tion and HA section or their equivalents • Use approved bonding agent, sealants or their equivalents when required • Use tools and recommended special tools where specified for safe and efficient service repairs. • When repairing the fuel, oil, water, vacuum or exhaust systems, check all affected lines for leaks. • Dispose of drained oil or the solvent used for cleaning parts in an appropriate manner. • Precautions for Multiport Fuel Injection System or ECCS Engine Sefore connecting or disconnecting multiport fuel injection system or ECM (ECCS control module) harness connector, be sure to turn the ignition switch to the “OFF” position and disconnect the negative battery terminal Otherwise, there may be damage to ECM. • Before disconnecting pressurized fuel line from fuel pump to injectors, be sure to release fuel pressure to eliminate danger • Be careful not to jar components such as ECM and mass air flow sensor • Precautions for Three Way Catalyst If a large amount of unburned fuel flows into the converter, the converter temperature wfll be excessively high. To prevent this, follow the procedure below: 1. Use unleaded gasoline only. Leaded gasoline will seri- ously damage the three way catalyst. 2. When checking for ignition spark or measuring engine compression, make tests quickly and onfy when neces- sary. 3. Do not run engine when the fuel tank level is low, other- wise the engine may misfire causing damage lo Ihe con- verter. Do not place the vehicle on flammable material. Keep flamma- ble material off the exhaust pipe and the three way catalyst Precautions for Turbocharger The turbocharger turbine revolves at extremely high speeds and becomes very hot. Therefore, it is essential to maintain a clean supply of oil flowing through the turbocharger and to follow all required maintenance instructions and operating procedures. For proper operation of Ihe system, follow the procedure below. 1 Always use the recommended oil. Follow the instructions for proper time to change the oil and proper oil level 2. Avoid accelerating engine to a high rpm immediately after starting. 3. If engine had been operating at high rpm for an extended period of time, let it idle for a few minutes prior [o shutting it off. Engine Oils Prolonged and repealed contact with used engine oil may cause skin cancer. Try to avoid direct skin contact with used oil. If skin contact is made, wash thoroughly with soap or hand cleaner as soon as possible HEALTH PROTECTION PRECAUTIONS • Avoid prolonged and repeated contact with oils, particu- larly used engine oils, • Wear protective clothing, including impervious gloves where practicable. • Do not put oily rags in pockets • Avoid contaminating clothes, particularly underpants, with oil. • Heavily sailed clothing and oil-impregnated footwear should not be worn. Overalls must be cleaned regularly • First Aid treatment shouid be obtained immediately for open cuts and wounds • Use barrier creams, applying them before each work period, to help the removal of oil from the skin • Wash with soap and water to ensure all oil is removed (skin cleansers and nail brushes will help). Preparations containing lanolin replace the natural skin oils which have been removed • Do not use gasoline, kerosine, diesel fuel, gas oil, Ihinners or solvents for cleaning skin • If skin disorders develop, obtain medical advice without delay • Where practicable, degrease components prior to han- dling • Where there is a risk of eye contact, eye protection should be worn, for example, chemical goggles or face shields; in addition an eye wash facility should be provided. i-v ENVIRONMENTAL PROTECTION PRECAUTIONS Burning used engine oil in small space heaters or boilers can . be recommended only for units of approved design The heat- ing system must meet the requirements of HM Inspectorate ol Pollution for small burners of less than 0,4 MW. If in doubt check with Ihe appropriate local authority and/or manufacturer of the approved appliance. Dispose of used oil and used oil fillers through authorized . waste disposal contractors to licensed waste disposal sites, or to the waste oil reclamation trade. If in doubt, contact the local authority for advice on disposal facilities, :•• It is illegal to pour used oil on to the ground, down sewers or drains, or into water courses The regulations concerning the pollution of the environment witl vary from country to country.

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2. Preparing Vehicle for Tow Hitch Installation. (a) Protect exhaust pipe with a shop towel. (b) Remove lower LH cover. Set aside cover and fastening hardware for later use. (Fig. 2-1) (c) Remove the tie down hook. Discard tie down hook and 2 bolts. (Fig. 2-1) (d) Remove lower RH cover. Set aside cover and fastening hardware for later use. (Fig. 2-2) (e) Remove the tie down hook. Discard tie down hook and 2 bolts. (Fig. 2-2) 3. Remove the factory lower fascia cover (a) Remove push pins (1 per side) and save for later use. (Fig. 3-1) (b) Using diagonal cutters, cut the tab on the fascia cover in order to access the plastic clip. Remove clips (1 per side) and save for later use. (Fig. 3-2) Do not damage the clip while cutting the tab. (If damage occurs, the clip p/n is: 52535-28020). (c) Remove lower fascia cover by pulling cover away from vehicle and disengaging latches. (Fig. 3-3) (d) Remove rubber drain plugs from bottom and outside of the frame on both sides (LH/RH). (Fig. 3-4)

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engine type (i.e. I4 vs V6) 2. Remove Existing Exhaust System (I4 & V6) (a) Using a 14mm socket & box wrench, remove 2 bolts & 2 nuts from front flange (Fig. 2-1) (b) Keep all original hardware (OE) bolts & nuts. (c) FOR PPO ONLY: Ensure that the original gasket remains on converter assembly flange. (Fig. 2-2) (d) FOR DIO ONLY: Replace the original exhaust gasket with PN: 90080-43033 (e) Using a 14mm socket, remove & discard (either) 2 nuts (I4) OR 4 nuts (V6) from rear tailpipe/rear muffler(s) connection. (Fig. 2-3) (f) Using the exhaust hanger removal tool, release the center exhaust pipe from both supporting hangers. Discard center exhaust pipe properly. (g) Using the exhaust hanger removal tool, release the rear Passenger Side muffler from the 3 supporting hangers (I4 & V6). For V6, release the rear Drivers Side muffler from the 2 supporting hangers. Make sure to completely remove the hangers from the vehicle AND the muffler, prior to discarding the muffler. Discard muffler(s) properly. (Fig. 2-4) NOTE: Use of lubrication (such as WD40 or soap and water) on the rubber exhaust hangers can facilitate removal and installation of rubber hangers. 3. Installation of TRD Exhaust System (I4 & V6) (a) Connect the TRD B & C pipes using the supplied exhaust gasket, and the two 14mm bolts. (Fig. 2-5) (b) Install the new center (B&C) pipe assembly onto the 2 OE hangers, and connect front flange using the OE hardware. (Fig. 2-6) (1) NOTE: FOR PPO ONLY: Ensure that the original gasket remains on converter assembly flange. (Fig. 2-2)

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ISSUE Some F-Super Duty vehicles equipped with the 6.4L diesel may exhibit one or more of the following concerns: lacks power, leaks oil, fuel or coolant from the tail pipe, abnormal tailpipe sediment, white smoke or ash, exhaust smell, knock or rattle, elevated idle, surge, crankcase oil level over-full, MIL On, DTC’s P0087, P2291, P0263-P0284, P0300-P0308, P1336, P132B, P2262, P2263, P244C or P244D. ACTION To diagnose and correct the concern, refer to the following Service Procedure. SERVICE PROCEDURE NOTE DO NOT START ENGINE Evaluation, Inspections, And Checks 1. Retrieve KOEO diagnostic trouble codes (DTCs). 2. Check oil level. Remove and clean dipstick. Reinsert into dipstick tube only until dipstick handle reaches top of dipstick tube (Figure 1). NOTE 3. Check coolant level. 4. Check fuel quality. 5. Inspect tailpipes for abnormal sediment; for example black soot, white ash, oil, coolant, or fuel. 6. Inspect vehicle for coolant, oil and fuel leaks at the following locations: • Tailpipes