2000 LEXUS GS400 wiring

FI1066
IN0DC±01
Z11554
Seal Lock Adhesive
IN±4
± INTRODUCTIONREPAIR INSTRUCTIONS
4 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
REPAIR INSTRUCTIONS
GENERAL INFORMATION
BASIC REPAIR HINT
(a) Use fender, seat and floor covers to keep the vehicle
clean and prevent damage.
(b) During disassembly, keep parts in the appropriate order
to facilitate reassembly.
(c) Installation and removal of battery terminal:
(1) Before performing electrical work, disconnect the
negative (±) terminal cable from the battery.
(2) If it is necessary to disconnect the battery for in-
spection or repair, first disconnect the negative (±)
terminal cable.
(3) When disconnecting the terminal cable, to prevent
damage to the battery terminal, loosen the cable
nut and raise the cable straight up without twisting
or prying it.
(4) Clean the battery terminals and cable ends with a
clean shop rag. Do not scrape them with a file or oth-
er abrasive objects.
(5) Install the cable ends to the battery terminals after
loosening the nut, and tighten the nut after installa-
tion. Do not use a hammer to tap the cable ends
onto the terminals.
(6) Be sure the cover for the positive (+) terminal is
properly in place.
(d) Check hose and wiring connectors to make sure that they
are connected securely and correctly.
(e) Non±reusable parts
(1) Always replace cotter pins, gaskets, O±rings, oil
seals, etc. with new ones.
(2) Non±reusable parts are indicated in the component
illustrations by the ºº symbol.
(f) Precoated parts
Precoated parts are bolts, nuts, etc. that are coated with
a seal lock adhesive at the factory.
(1) If a precoated part is retightened, loosened or
caused to move in any way, it must be recoated with
the specified adhesive.
(2) When reusing precoated parts, clean off the old
adhesive and dry with compressed air. Then apply
the specified seal lock adhesive to the bolt, nut or
threads.

PP±10
± PREPARATIONSFI (2JZ±GE)
62 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
09842±30070Wiring ºFº EFI InspectionInjector

SS0F9±01
SS±46
± SERVICE SPECIFICATIONSAUTOMATIC TRANSMISSION
202 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
TORQUE SPECIFICATION
Part tightenedN´mkgf´cmft´lbf
Transmission output flange x Output shaft1261,28093
Extension housing x Transmission case3434525
Solenoid wiring clamp set bolt101007
Oil strainer x Valve body101007
Oil pan x Transmission case7.47565 in.´lbf
Drain plug2020515
Shift solenoid valve SLU and SLN lock plate set bolt101007
Shift solenoid valve SLT lock plate set bolt101007
Shift solenoid valve x Valve body101007
Valve body x Transmission case101007
Shift lever assembly x Body8.38574 in.´lbf
Control shaft x Control lever131289
Shift lock control unit assembly x Shift lever plate2.02017 in.´lbf
Shift lever housing set bolt and nut3.94035 in.´lbf
Exhaust manifold with TWC set nut 2JZ±GE3940029
Heated oxygen sensor x Front exhaust pipe4445033
Front floor center brace x Body7.47565 in.´lbf
Front exhaust pipe x Exhaust manifold 2JZ±GE4445033
Front exhaust pipe x Front TWC 1UZ±FE4445033
Front TWC x Exhaust manifold 1UZ±FE6263046
Pipe support bracket x Transmission4445033
Center exhaust pipe x Tail pipe4445033
Front exhaust pipe x Center exhaust pipe4445033
Heat insulator x Body5.45548 in.´lbf
Shift control rod x Shift lever assembly131309
Oil cooler pipe union nut4445033
Oil cooler pipe clamp set bolt5.45548 in.´lbf
Flywheel housing under cover x Transmission housing 1UZ±FE1818513
Torque converter clutch x Drive plate4849035
Engine rear mounting x Body2627020
Starter x Transmission 2JZ±GE3738027
Transmission x Engine 17 mm head
14 mm head72
37730
38053
27
Drive plate x Crankshaft8385061

FI2553
SST
SF±2
± SFI (2JZ±GE)SFI SYSTEM
1468 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
7. ELECTRONIC CONTROL SYSTEM
(a) Before removing SFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch OFF or disconnecting the negative (±) terminal
cable from the battery.
HINT:
Always check the diagnostic trouble code before disconnecting
the negative (±) terminal cable from the battery.
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (±) cable
terminals.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal con-
tact can further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) When inspecting a connector with a volt/ohmmeter.
(1) Carefully take out the water±proofing rubber if it is
a water±proof type connector.
(2) Insert the test probe into the connector from wiring
side when checking the continuity, amperage or
voltage.
(3) Do not apply unnecessary force to the terminal.
(4) After checking, install the water±proofing rubber on
the connector securely.
(5) Use SST for inspection or test of the injector or its
wiring connector.
SST 09842±30070

SF0N9±04
B01568
Sound Scope
B01569
B01570
Ohmmeter
± SFI (2JZ±GE)INJECTOR
SF±19
1485 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
INJECTOR
ON±VEHICLE INSPECTION
1. REMOVE ENGINE COVER
Remove 4 nuts and engine cover.
2. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(1) With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine speed.
(2) If you have no sound scope, you can check the in-
jector transmission operation with a screwdriver.
If no sound or an unusual sound is heard, check the wiring con-
nector, injector or injection signal from the ECM.
3. INSPECT INJECTOR RESISTANCE
(a) Disconnect the injector connectors.
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance: 13.4 ± 14.2 W at 20°C (68°F)
If the resistance is not as specified, replace the injector.
(c) Reconnect the injector connectors.
4. REINSTALL ENGINE COVER
Reinstall the 4 engine cover with the 4 nuts.

SF0NL±05
B09506
B01608
B01982
LEXUS
Hand±Held
Tester SF±32
± SFI (2JZ±GE)THROTTLE BODY
1498 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
THROTTLE BODY
ON±VEHICLE INSPECTION
1. REMOVE ENGINE COVER
Remove the 4 nuts and engine cover.
2. INSPECT SYSTEM OPERATION
(a) Check that the throttle linkage moves smoothly.
(b) Inspect the throttle control motor for operating sound.
(1) Turn the ignition switch ON.
(2) When turning the accelerator pedal position sensor
lever, check the running sound of the motor. Also,
check that there is no friction sound.
If operation is not as specified, check the throttle control motor,
wiring and ECM.
(c) Inspect the throttle position sensor and accelerator pedal
position sensor function.
(1) Connect the LEXUS hand±held tester to the DLC3.
(2) When turning the accelerator pedal position sensor
lever to the full±open position, check that the
throttle valve opening percentage (THROTTLE
POS) of the CURRENT DATA showns the standard
value.
Throttle valve opening percentage: 60 % or more
If operation is not as specified, check that the throttle position
sensor, accelerator pedal position sensor, wiring and ECM.
(d) Start the engine, and check that the Malfunction Indicator
Lamp (MIL) does not light up.
(e) Inspect the air assist system.
(1) Allow the engine to warm up to normal operating
temperature.

B09507
B01620
Ohmmeter3 (CL±)
4 (CL+)
1 (M+)
2 (M±)
B01942VCOhmmeter
E2
B01943
VC Ohmmeter
E2
± SFI (2JZ±GE)THROTTLE BODY
SF±33
1499 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
(2) Turn the A/C switch ON and OFF, and check the idle
speed.
Idle speed (Transmission in neutral):
700 ± 50 rpm (A/C OFF)
750 ± 50 rpm (A/C ON)
NOTICE:
Perform inspection under condition without electrical load.
(3) With engine idling, pinch the air assist hose and
check that engine speed drops, and then returns
back up to idle speed.
If operation is not as specified, check the throttle body, wiring
and ECM.
(f) After checking the above (b) to (e), perform the diving test
and check that there is no sense of incongruity.
3. INSPECT THROTTLE CONTROL MOTOR
(a) Disconnect the throttle control motor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal 3 (CL±) and 4 (CL+).
Resistance: 4.2 ± 5.2 W at 20°C (68°F)
(c) Using an ohmmeter, measure the resistance between ter-
minal 1 (M+) and 2 (M±).
Resistance: 0.3 ± 100 W at 20°C (68°F)
If the resistance is not as specified, replace the throttle control
motor. (See page SF±37)
(d) Reconnect the throttle control motor connector.
4. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the throttle position sensor connector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the throttle position
sensor. (See page SF±37)
(c) Reconnect the throttle position sensor connector.
5. INSPECT ACCELERATOR PEDAL POSITION SEN-
SOR
(a) Disconnect the accelerator pedal position sensor con-
nector.
(b) Using an ohmmeter, measure the resistance between ter-
minals VC and E2.
Resistance: 1.2 ± 3.2 kW at 20°C (68°F)
If the resistance is not as specified, replace the accelerator ped-
al position sensor. (See page SF±37)

A02640
Ohmmeter
SF0NR±03
± SFI (2JZ±GE)CAMSHAFT TIMING OIL CONTROL VALVE
SF±41
1507 Author: Date:
2000 LEXUS GS300/GS400 (RM718U)
CAMSHAFT TIMING OIL CONTROL
VA LV E
ON±VEHICLE INSPECTION
1. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE
RESISTANCE
(a) Disconnect the oil control valve connector.
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance: 5.5 ± 12 W at 20°C (68°F)
If the resistance is not as specified, replace the valve.
(c) Reconnect the oil control valve connector.
2. INSPECT VVT±i OPERATION
(a) Allow the engine to warm up to normal operating tempera-
ture.
(b) Check that the engine stalls or becomes in rough±idling
state when the battery positive voltage is applied to the oil
control valve with the engine idling.
If operation is not as specified, check the oil control valve (see
page SF±43), VVT±i pulley, intake camshaft, wiring and ECM.