Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSLEXUS2005ES 330REPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALCHARGING SYSTEMSSTARTING & CHARGINGGENERATOR ASSY (3MZ-FE)REPLACEMENT

2005 Lexus ES 330

Generator ASSY (3MZ-FE): Replacement

2005 Lexus ES 330SECTION Replacement

DISCONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
REMOVE GENERATOR ASSY
1. Remove the 2 wire harness clamps.
2. Disconnect the generator connector.
3. Open the terminal cap.
4. Remove the nut, then disconnect the generator wire.
  
  Fig 1: Locating Wire Harness Clamps Connector And Terminals Cap
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Loosen bolts A and B.
6. Loosen bolt C to lessen the tension of the V-ribbed belt No.1.
  
  Fig 2: Locating Bolts A, B And C
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Remove bolts A and B, then remove the generator.
  
  Fig 3: Locating Bolts A And B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
8. Remove the bolt, then remove the wiring harness clamp bracket.
Fig 4: Locating Wiring Harness Clamp Bracket Bolt
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSTALL GENERATOR ASSY
1. Install the wiring harness clamp bracket with the bolt.
  1. Torque: 8.4 N.m (86 kgf.cm, 74 in..lbf)
2. Temporarily install the generator with bolts A and B.
  
  Fig 5: Locating Bolts A And B
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Adjust the V-ribbed belt No. 1 tension by tightening bolt C (see ENGINE (3MZ-FE) ).
4. Tighten bolts A and B.
  1. Torque:
  2. 18 N.m (180 kgf.cm, 13 ft.lbf) for bolt A
  3. 58 N.m (591 kgf.cm, 43 ft.lbf) for bolt B
5. Install the generator wire with the nut.
  1. Torque: 9.8 N.m (100 kgf.cm, 7 ft.lbf)
6. Connect the generator connector.
7. Install the wire harness clamp.
Fig 6: Locating Bolts A, B And C
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INSPECT DRIVE BELT (See ENGINE (3MZ-FE) )
CONNECT ENGINE WIRE NO. 3 (BATTERY NEGATIVE TERMINAL)
1. Torque: 5.4 N.m (55 kgf.cm, 48 in..lbf)
SYSTEM INITIALIZATION (See CHARGING SYSTEM (3MZ-FE) )

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.