ECU LEXUS GS400 2000 Service Manual Online

BR0JI±07
W00742
W00743
BR±16
± BRAKEFRONT BRAKE PAD
2124 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPLACEMENT
1. REMOVE FRONT WHEEL
2. INSPECT PAD LINING THICKNESS
Check the pad thickness through the caliper inspection hole
and replace the pads if they are not within the specification.
Minimum thickness: 1.0 mm (0.039 in.)
3. LIFT UP CALIPER
(a) Hold the sliding pin on the bottom and loosen the installa-
tion bolt.
(b) Remove the installation bolt.
(c) Lift up the caliper and suspend it securely.
HINT:
Do not disconnect the flexible hose from the caliper.
4. REMOVE 2 ANTI± SQUEAL SPRINGS
5. REMOVE 2 BRAKE PADS WITH 4 ANTI±SQUEAL
SHIMS
6. REMOVE 4 PAD SUPPORT PLATES
NOTICE:
The anti±squeal springs and support plates can be used
again provided that they have sufficient rebound, no de-
formation, cracks or wear, and have had all rust, dirt and
foreign particles cleaned off.
7. CHECK DISC THICKNESS AND RUNOUT
(See page BR±21)
8. INSTALL 4 PAD SUPPORT PLATES
9. INSTALL NEW PADS
NOTICE:
When replacing worn pads, the anti±squeal shims must be
replaced together with the pad.
(a) Install the 2 anti±squeal shims to each pad.
HINT:
Apply disc brake grease to both sides of the inner anti±squeal
shims (See page BR±15).
(b) Install the inner pad with the pad wear indicator plates fac-
ing downward.
(c) Install the outer pad.
NOTICE:
There should be no oil or grease adhering to the friction
surfaces of the pads or the disc.
(d) Install the 2 anti±squeal springs.

BR0JK±03
F01624
± BRAKEFRONT BRAKE CALIPER
BR±19
2127 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. DISCONNECT FLEXIBLE HOSE
Remove the union bolt and 2 gaskets from the caliper, then dis-
connect the flexible hose from the caliper. Use a container to
catch brake fluid as it drains out.
Torque: 30 N´m (310 kgf´cm, 22 ft´lbf)
HINT:
At the time of installation, install the flexible hose lock securely
in the lock hole in the caliper.
2. REMOVE CALIPER
(a) Hold the sliding pin and loosen the 2 installation bolts.
Torque: 34 N´m (350 kgf´cm, 25 ft´lbf)
(b) Remove the 2 installation bolts.
(c) Remove the caliper from the torque plate.
3. REMOVE 2 ANTI±SQUEAL SPRINGS
4. REMOVE 2 BRAKE PADS WITH 4 ANTI±SQUEAL
SHIMS
5. REMOVE 4 PAD SUPPORT PLATES

F01635
Direction of disc rotation for
forward movement
F01636
F07232
AB
Claw
BR±26
± BRAKEREAR BRAKE PAD
2134 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(b) Install the 2 anti±squeal shims on each pad.
HINT:
Make sure the arrows on the inner anti±squeal shims facing to
the direction of disc rotation as shown in the illustration.
(c) Draw out a small amount of brake fluid from the reservoir.
(d) Press in the pistons with a monkey wrench handle or
equivalent.
HINT:

Tape the monkey wrench handle before use.

If the piston is difficult to push in, loosen the bleeder plug
and push in the piston while letting some brake fluid es-
cape.
(e) Install the 2 pads.
7. I N S TA L L PA D G U I D E P I N A N D A N T I ± S Q U E A L
SPRING
(a) Install the pad guide pin and clip.
(b) Install the anti±squeal spring.
HINT:

Ensure that the claw of the anti±squeal spring is raised up
on the caliper securely.

Ensure that there is no gap between the pad guide pin
and anti±squeal spring.

Ensure that ºAº and ºBº portions of anti±squeal spring are
attached to the pad.
8. INSTALL FRONT WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
9. DEPRESS BRAKE PEDAL SEVERAL TIMES
10. CHECK THAT FLUID LEVEL IS AT MAX LINE

BR0JS±06
F01639
BR±28
± BRAKEREAR BRAKE CALIPER
2136 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REMOVAL
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. DISCONNECT FLEXIBLE HOSE
Remove the union bolt and gasket from the caliper, then discon-
nect the flexible hose from the caliper. Use a container to catch
brake fluid as it drains out.
Torque: 30 N´m (310 kgf´cm, 22 ft´lbf)
HINT:
At the time of installation, please refer to the following item.
Install the flexible hose lock securely in the lock hole in the cali-
per.
3. REMOVE CALIPER
(a) Remove the 2 installation bolts.
Torque: 104 N´m (1,065 kgf´cm, 77 ft´lbf)
(b) Remove the caliper.
4. REMOVE BRAKE PADS (See page BR±25)
(a) Remove the anti±squeal spring.
(b) Remove the clip and pad guide pin.
(c) Remove the 2 pads with the 4 anti±squeal shims.

BR0JY±03
F01647
F01648
F01649
F01650
F01651
BR±34
± BRAKEPARKING BRAKE
2142 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE REAR WHEEL
Torque: 103 N´m (1,050 kgf´cm, 76 ft´lbf)
2. REMOVE REAR DISC BRAKE ASSEMBLY
(a) Remove the 2 mounting bolts and remove the disc brake
assembly.
Torque: 104 N´m (1,065 kgf´cm, 77 ft´lbf)
(b) Suspend the disc brake securely and so the hose is not
stretched.
3. REMOVE DISC
(a) Release the parking brake pedal.
(b) Place matchmarks on the disc and rear axle hub.
(c) Remove the disc.
HINT:

If the disc cannot be removed easily, turn the shoe adjust-
er until the wheel turns freely.

If there are no matchmarks, temporarily install the disc,
then measure the disc runout and install the disc in posi-
tion (See page BR±30).
4. REMOVE SHOE RETURN SPRINGS
Using needle±nose pliers, remove the 2 shoe return springs.
5. REMOVE SHOE STRUT WITH SPRING
HINT:
At the time of reassembly, install the strut with the spring facing
forward.
6. REMOVE FRONT SHOE AND ADJUSTER
(a) Slide out the front shoe and remove the shoe adjuster.
(b) Disconnect the tension spring and remove the front shoe.
(c) Remove the 2 cups, shoe hold±down spring and pin.
7. REMOVE REAR SHOE AND TENSION SPRING
(a) Slide out the rear shoe.
(b) Remove the tension spring from the rear shoe.
(c) Disconnect the parking brake cable from the parking
brake shoe lever.
(d) Remove the 2 cups, shoe hold±down spring and pin.

CH049±01
P10639
Pulley
P10637
B02022
29 mm
Socket
Wrench
B01648
Wire
Clip
P10835
Turn
SST (B)SST (A)
± CHARGING (2JZ±GE)GENERATOR
CH±13
1615 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REASSEMBLY
1. PLACE DRIVE END FRAME ON PULLEY
2. INSTALL ROTOR TO DRIVE END FRAME
3. INSTALL RECTIFIER END FRAME
(a) Place the generator washer on the rotor.
(b) Using a 29 mm socket wrench and press, slowly press in
the rectifier end frame.
(c) Install the 3 nuts.
Torque: 4.5 N´m (46 kgf´cm, 40 in.´lbf)
(d) Install the wire clip with the nut.
Torque: 5.4 N´m (55 kgf´cm, 48 in.´lbf)
4. INSTALL PULLEY
(a) Install the pulley to the rotor shaft by tightening the pulley
nut by hand.
(b) Hold SST (A) with a torque wrench, and tighten SST (B)
clockwise to the specified torque.
SST 09820±63010
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(c) Check that SST (A) is secured to the pulley shaft.

B01655
CH046±05
B01654
Plate Terminal
B01997
B01650
P10835
Turn
SST (B)SST (A)
± CHARGING (2JZ±GE)GENERATOR
CH±7
1609 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
DISASSEMBLY
1. REMOVE REAR END COVER
(a) Remove the nut and terminal insulator.
(b) Remove the bolt, 3 nuts, plate terminal and end cover.
2. REMOVE BRUSH HOLDER AND VOLTAGE REGULA-
TOR
(a) Remove the brush holder cover from the brush holder.
(b) Remove the 5 screws, brush holder and voltage regulator.
(c) Remove the seal plate from the rectifier end frame.
3. REMOVE RECTIFIER HOLDER
(a) Remove the 4 screws and rectifier holder.
(b) Remove the 4 rubber insulators.
4. REMOVE PULLEY
(a) Hold SST (A) with a torque wrench, and tighten SST (B)
clockwise to the specified torque.
SST 09820±63010
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(b) Check that SST (A) is secured to the rotor shaft.

EC04V±06
B08612
PCV Valve VSV for EVAP
Front TWC
EVAP Service Port
Fill Check LineCutoff ValveCharcoal Canister
Air Inlet Line
Vapor Pressure Sensor
Fuel Tank Cap
VSV for Vapor
Pressure Sensor
Purge Line
EVAP Line
Vent Line
Air Drain Hose
Rear TWC
EC±2
± EMISSION CONTROL (2JZ±GE)PARTS LAYOUT AND SCHEMATIC DRAWING
1453 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
PARTS LAYOUT AND SCHEMATIC DRAWING
LOCATION

± ENGINE MECHANICAL (2JZ±GE)VALVE CLEARANCE
EM±9
1363 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
15. REINSTALL SPARK PLUGS
16. REINSTALL IGNITION COILS AND HIGH±TENSION
CORD SET ASSEMBLY (See page IG±9)
17. REINSTALL NO.3 TIMING BELT COVER
(a) Install the gasket to the timing belt cover.
(b) Using a 5 mm hexagon wrench, install the timing belt cov-
er with the 4 bolts.
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)
(c) Install the oil filler cap.
18. REINSTALL THROTTLE BODY AND INTAKE AIR CON-
NECTOR ASSEMBLY
(a) Install a new gasket to the air intake chamber.
(b) Place the throttle body together with the intake air con-
nector on the cylinder head.
(c) Connect the vacuum hose (from actuator for ACIS) to the
No.1 vacuum pipe.
(d) Connect the 2 water bypass hoses to the throttle body.
(e) Install the 4 bolts and 2 nuts holding the intake air connec-
tor to the air intake chamber.
Torque: 28 N´m (280 kgf´cm, 21 ft´lbf)
(f) Install the 2 nuts holding the throttle body bracket to the
cylinder head.
Torque: 21 N´m (210 kgf´cm, 15 ft´lbf)
(g) Connect the air assist hose to the intake air connector.
(h) Install the PCV hose to the intake air connector.
(i) Install the EVAP hose (from charcoal canister) to the VSV
for EVAP.
(j) Install the vacuum hose (from No.2 vacuum pipe) to the
No.1 vacuum pipe.
(k) Install the throttle position sensor connector.
(l) Install the accelerator pedal position sensor connector.
(m) Install the throttle control motor connector.
(n) Install the VSV connector for EVAP.
(o) Secure the engine wire with the clamp on the throttle body
bracket.
(p) Install the engine wire clamp with the clamp bracket of the
throttle body.
(q) Connect the accelerator cable to the throttle body.
19. REINSTALL INTAKE AIR RESONATOR
20. REINSTALL ENGINE COVER
Install the engine cover with the 4 nuts.
21. REFILL WITH ENGINE COOLANT
22. START ENGINE AND CHECK FOR LEAKS

A02733
Clamp Bracket
A02811
A02732
(v)(s)(t)
(u)(u)
(t)
(s) EM±56
± ENGINE MECHANICAL (2JZ±GE)CYLINDER HEAD
1410 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(g) Connect the 2 knock sensor connector.
(h) Connect the starter connector.
(i) Connect the oil pressure switch connector.
(j) Connect the oil level sensor connector.
(k) Install the clamp bracket to the intake manifold.
(l) Connect the 2 wire clamps to the No.1 oil pipe and clamp
bracket on the intake manifold.
(m) Install the 2 ground terminals to the intake manifold.
Tighten so that each calking part should face inside.
(n) Install the clamp bracket to the water pump.
(o) Connect the generator connector.
(p) Connect the crankshaft position sensor connector.
(q) Connect the heated oxygen sensor (bank 1 sensor 1)
connector.
(r) Secure the engine wire with the clamp.
(s) Install the 2 hose clamps to the cylinder head and oil filter
bracket.
(t) Install the heated oxygen sensor (bank 2 sensor 1) con-
nector and engine wire clamp to the hose clamps.
(u) Install the 2 water bypass hoses to the hose clamps on
the cylinder head and oil filter bracket.
(v) Install the ground strap to the cylinder head.
12. INSTALL SPARK PLUGS
13. INSTALL IGNITION COILS AND HIGH±TENSION
CORD SET ASSEMBLY (See page IG±9)
14. INSTALL NO.3 TIMING BELT COVER
Torque: 8.0 N´m (80 kgf´cm, 71 in.´lbf)