Starting (Service Information): Overview Lexus GS III facelift

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1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation.
2. REMOVE COOL AIR INTAKE DUCT SEAL. Refer to «REMOVAL - Step 15»(ref-382704-S06161003072011012800000)
3. REMOVE ENGINE ROOM SIDE COVER LH. Refer to «REMOVAL - Step 17»(ref-382704-S06161003072011012800000)
4. REMOVE ENGINE ROOM SIDE COVER RH. Refer to «REMOVAL - Step 16»(ref-382704-S06161003072011012800000)
5. REMOVE V-BANK COVER. Refer to «REMOVAL - Step 18»(ref-382704-S06161003072011012800000)
6. DISCONNECT NO. 2 RELAY BLOCK Remove the bolt, nut and disconnect the No. 2 relay block.
7. REMOVE FRONT CONSOLE UPPER PANEL GARNISH . Refer to «REMOVAL - Step 17»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
8. REMOVE CONSOLE UPPER PANEL ASSEMBLY . Refer to «REMOVAL - Step 18»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
9. REMOVE INSTRUMENT PANEL FINISH PANEL END RH . Refer to «REMOVAL - Step 19»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
10. REMOVE INSTRUMENT PANEL FINISH PANEL END LH . Refer to «REMOVAL - Step 20»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
11. REMOVE CONSOLE BOX PLATE . Refer to «REMOVAL - Step 21»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
12. REMOVE CONSOLE BOX REGISTER ASSEMBLY (for 4WD) . Refer to «REMOVAL - Step 22»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
13. REMOVE CONSOLE BOX (for 4WD) . Refer to «REMOVAL - Step 23»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
14. REMOVE FRONT SEAT ASSEMBLY LH (for 4WD) Remove the front seat LH Refer to «REMOVAL»(ref-382755-S20303182612011012800000).
15. REMOVE ENGINE UNDER COVER (for 2WD)
16. REMOVE ENGINE UNDER COVER (for 4WD)
17. REMOVE NO. 2 ENGINE UNDER COVER (for 2WD). Refer to «REMOVAL - Step 8»(ref-382704-S06161003072011012800000)
18. REMOVE REAR ENGINE UNDER COVER LH (for 2WD). Refer to «REMOVAL - Step 11»(ref-382704-S06161003072011012800000)
19. REMOVE REAR ENGINE UNDER COVER RH (for 2WD). Refer to «REMOVAL - Step 10»(ref-382704-S06161003072011012800000)
20. REMOVE FRONT EXHAUST PIPE ASSEMBLY Remove the front exhaust pipe Refer to «REMOVAL»(/lexus/gs/iii-facelift-2007-2011/remont/exhaust/#exhaust-service-information__removal) .
21. REMOVE FRONT PROPELLER SHAFT ASSEMBLY (for 4WD) . Refer to «REMOVAL - Step 2»(/lexus/gs/iii-facelift-2007-2011/remont/driveshaft-universal-joints/#propeller-shaft-service-information)
22. REMOVE EXHAUST MANIFOLD SUB-ASSEMBLY LH Remove the 2 bolts and ground cable. Remove the bolt and engine wire bracket. Disconnect the sensor connector. Remove the 6 nuts, manifold and gasket.
23. REMOVE STARTER ASSEMBLY Disconnect the starter connector. Detach the terminal cap. Remove the nut and disconnect the starter cable. Remove the 2 bolts and starter.

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1. REMOVE REPAIR SERVICE STARTER KIT Remove the nut, and disconnect the lead wire from the repair service starter kit. Remove the 2 screws holding the repair service starter kit. Remove the repair service starter kit. Remove the return spring and plunger.
2. REMOVE STARTER YOKE ASSEMBLY Remove the 2 through bolts, and pull out the starter yoke and commutator end frame together. Remove the starter yoke from the commutator end frame.
3. REMOVE STARTER ARMATURE PLATE Remove the plate from the starter yoke.
4. REMOVE STARTER COMMUTATOR END FRAME COVER Using a screwdriver, remove the cover.
5. REMOVE STARTER ARMATURE ASSEMBLY Hold the starter commutator end frame in a vise between aluminum plates. NOTE: Do not overtighten the vise. Using snap ring pliers, remove the snap ring and plate washer. Remove the starter armature from the commutator end frame. NOTE: Do not drop the starter armature assembly.
6. REMOVE PLANETARY GEAR Remove the 3 planetary gears.
7. REMOVE STARTER CENTER BEARING CLUTCH SUB-ASSEMBLY Remove the starter center bearing clutch together with the drive lever set pin from the starter drive housing. Remove the drive lever set pin from the starter center bearing clutch.

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1. INSPECT STARTER ASSEMBLY NOTE: These tests must be performed within 3 to 5 seconds to prevent the coil from burning out. Perform pull-in/holding test. Disconnect the lead wire from terminal C. Connect the battery to the magnet starter switch as shown in the illustration. Then check that the clutch pinion gear moves outward. If the result is not as specified, replace the magnet starter switch assembly. Disconnect the negative (-) lead from terminal C under condition pull-in test. Check that the pinion gear remains out. If the result is not as specified, replace the magnet starter switch assembly. Disconnect the negative (-) lead from the starter body. Check that the clutch pinion gear returns inward. If the result is not as specified, replace the magnet starter switch assembly. Perform operation test without load. Connect the lead wire to terminal C with the nut. Make sure that the lead wire is not grounded. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) Mount the starter in a vise. Connect the battery and an ammeter to the starter as shown in the illustration. Check that the starter rotates smoothly and steadily while the pinion gear is moving outward. Then measure the current. Standard current 90 A or less at 11.5 V If the result is not as specified, overhaul the starter.
2. INSPECT STARTER ARMATURE ASSEMBLY Using an ohmmeter, measure the resistance between any 2 segments of the commutator. Standard resistance Below 1 ohms If the result is not as specified, replace the starter armature assembly. Measure the resistance between each segment of the commutator and armature coil core. Standard resistance 10 kohms or higher If the result is not as specified, replace the starter armature assembly. Check the commutator surface for dirt or burning. If the surface is dirty or burnt, smooth the surface with 400-grit sandpaper or leather. Using a vernier caliper, measure the depth indicated in the illustration. Standard depth 3.1 mm (0.122 in.) Maximum depth 3.8 mm (0.150 in.) If the depth is greater than the maximum, replace the armature assembly.
3. INSPECT STARTER COMMUTATOR END FRAME ASSEMBLY Using a vernier caliper, measure the brush length. Standard length 9.0 mm (0.354 in.) Minimum length 4.0 mm (0.158 in.) If the length is less than the minimum, replace the starter commutator end frame assembly. Measure the resistance between the positive (+) and negative (-) brush holders. Standard resistance 10 kohms or higher If the result is not as specified, replace the starter commutator end frame assembly.
4. INSPECT STARTER CENTER BEARING CLUTCH SUB-ASSEMBLY Check the gear teeth on the planetary gear, internal gear and starter clutch for wear or damage. If damaged, replace the gear or clutch assembly. Also check the drive plate ring gear for wear or damage. Rotate the pinion gear clockwise, and check that it turns freely. Try to rotate the pinion gear counterclockwise and check that it locks. If necessary, replace the center bearing clutch sub-assembly.
5. INSPECT REPAIR SERVICE STARTER KIT Check the operation. Push in the plunger, and then check that it returns quickly to its original position. If necessary, replace the repair service starter kit. Check the resistance. Using an ohmmeter, measure the resistance between terminals 50 and C. Standard resistance Below 1 ohms If the result is not as specified, replace the repair service starter kit. Measure the resistance between terminal 50 and the switch body. Standard resistance Below 2 ohms If the result is not as specified, replace the repair service starter kit.

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1. INSTALL STARTER CENTER BEARING CLUTCH SUB-ASSEMBLY Apply high-temperature grease to the drive lever set pin, as shown in the illustration. Install the drive lever set pin onto the starter center bearing clutch. Install the starter center bearing clutch with drive lever set pin to the starter drive housing.
2. INSTALL PLANETARY GEAR Apply grease to the planetary gears and planetary shaft pins. Install the 3 planetary gears.
3. INSTALL STARTER ARMATURE ASSEMBLY Apply grease to the plate washer and armature shaft. Install the armature shaft onto the starter commutator end frame. NOTE: Be sure to install the snap ring in the armature shaft groove securely. Be sure to properly install the snap ring because it easily expands. Using snap ring pliers, install the plate washer and snap ring. Using a vernier caliper, measure the snap ring length. Maximum length 5.0 mm (0.197 in) If the length is greater than the maximum, replace the snap ring with a new one.
4. INSTALL STARTER COMMUTATOR END FRAME COVER Install the starter commutator end frame cover to the starter commutator end frame.
5. INSTALL STARTER ARMATURE PLATE Insert the starter armature plate into the starter yoke. Align the cutout of the plate with the inside protrusion of the starter yoke, and install the plate.
6. INSTALL STARTER COMMUTATOR END FRAME ASSEMBLY Align the rubber of the starter commutator end frame with the cutout of the starter yoke. Install the starter yoke onto the starter commutator end frame.
7. INSTALL STARTER YOKE ASSEMBLY Align the key located on the starter yoke with the keyway of the starter housing. Install the starter yoke with the 2 through bolts. Torque: 6.0 N*m (61 kgf*cm, 53 in.*lbf)
8. INSTALL REPAIR SERVICE STARTER KIT Apply high-temperature grease to the plunger and hook, as shown in the illustration. Hang the plunger hook of the repair service starter kit to the drive lever. Install the plunger and return spring. Install the repair service starter kit with the 2 screws. Torque: 7.5 N*m (76 kgf*cm, 66 in.*lbf) Connect the lead wire to terminal C with the nut. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf)

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1. INSTALL STARTER ASSEMBLY Install the starter with the 2 bolts. Torque: 58 N*m (591 kgf*cm, 43 ft.*lbf) Connect the starter cable with the nut, and then attach the terminal cap. Torque: 9.8 N*m (100 kgf*cm, 87 in.*lbf) Connect the starter connector.
2. INSTALL EXHAUST MANIFOLD SUB-ASSEMBLY LH Install a new gasket. NOTE: Do not damage the stud bolt when installing the exhaust manifold. Install the exhaust manifold to the cylinder head with the 6 nuts in the order shown in the illustration. Torque: 21 N*m (214 kgf*cm, 15 ft.*lbf) Connect the sensor connector. Install the engine wire bracket with the bolt. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) Install the ground cable with the 2 bolts. Torque: 10 N*m (102 kgf*cm, 7 ft.*lbf) for Cylinder head Torque: 13 N*m (133 kgf*cm, 10 ft.*lbf) for Body
3. INSTALL FRONT EXHAUST PIPE ASSEMBLY Install the front exhaust pipe Refer to «INSTALLATION»(/lexus/gs/iii-facelift-2007-2011/remont/exhaust/#exhaust-service-information) .
4. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
5. CHECK FOR EXHAUST GAS LEAKS . Refer to «INSTALLATION - Step 9»(/lexus/gs/iii-facelift-2007-2011/remont/exhaust/#exhaust-service-information)
6. INSTALL FRONT PROPELLER SHAFT ASSEMBLY (for 4WD) . Refer to «INSTALLATION - Step 1»(/lexus/gs/iii-facelift-2007-2011/remont/driveshaft-universal-joints/#propeller-shaft-service-information)
7. INSTALL REAR ENGINE UNDER COVER RH (for 2WD)
8. INSTALL REAR ENGINE UNDER COVER LH (for 2WD)
9. INSTALL NO. 2 ENGINE UNDER COVER (for 2WD). Refer to «INSTALLATION - Step 143»(ref-382704-S21777018532011012800000)
10. INSTALL ENGINE UNDER COVER (for 4WD)
11. INSTALL ENGINE UNDER COVER (for 2WD)
12. INSTALL FRONT SEAT ASSEMBLY LH (for 4WD) Install the front seat LH Refer to «INSTALLATION»(ref-382755-S33100207202011012800000).
13. INSTALL CONSOLE BOX (for 4WD) . Refer to «INSTALLATION - Step 16»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
14. INSTALL CONSOLE BOX REGISTER ASSEMBLY (for 4WD) . Refer to «INSTALLATION - Step 17»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
15. INSTALL CONSOLE BOX PLATE . Refer to «INSTALLATION - Step 18»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
16. INSTALL INSTRUMENT PANEL FINISH PANEL END LH . Refer to «INSTALLATION - Step 19»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
17. INSTALL INSTRUMENT PANEL FINISH PANEL END RH . Refer to «INSTALLATION - Step 20»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
18. INSTALL CONSOLE UPPER PANEL ASSEMBLY . Refer to «INSTALLATION - Step 21»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
19. INSTALL FRONT CONSOLE UPPER PANEL GARNISH . Refer to «INSTALLATION - Step 22»(/lexus/gs/iii-facelift-2007-2011/remont/gauges-instrument-panels/#instrument-panel-service-information)
20. CONNECT NO. 2 RELAY BLOCK Connect the No. 2 relay block with the bolt and nut. Torque: 12 N*m (125 kgf*cm, 10 ft.*lbf)
21. INSTALL V-BANK COVER. Refer to «INSTALLATION - Step 132»(ref-382704-S21777018532011012800000)
22. INSTALL ENGINE ROOM SIDE COVER RH. Refer to «INSTALLATION - Step 134»(ref-382704-S21777018532011012800000)
23. INSTALL ENGINE ROOM SIDE COVER LH. Refer to «INSTALLATION - Step 133»(ref-382704-S21777018532011012800000)
24. INSTALL COOL AIR INTAKE DUCT SEAL. Refer to «INSTALLATION - Step 135»(ref-382704-S21777018532011012800000)
25. PERFORM INITIALIZATION Perform initialization Refer to «INITIALIZATION»(ref-382578-S40254115562011012800000). NOTE: Certain systems need to be initialized after disconnecting and reconnecting the cable from the negative (-) battery terminal.

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1. CHECK STARTER RELAY ASSEMBLY Measure the resistance of the relay. Standard resistance Tester Connection Specified Condition 3 - 5 10 kohms or higher 3 - 5 Below 1 ohms (when battery voltage is applied to terminals 1 and 2) If the result is not as specified, replace the relay assembly.

See also:
• REMOVAL - Step 17
• REMOVAL
• REMOVAL - Step 2
• INSTALLATION