2003 LEXUS LS430 engine

Fig. 3: Inspecting Intake Air Control Function
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Remove the V-bank cover.
b. Connect the hand-held tester (with CAN VIM) to the DLC3.
c. Perform the ACTIVE TEST, and then check that the actuator rod operates.
d. Start the engine.
e. Check that the VSV for IAC valve in ON (seal) under these conditions.
Depressing the accelerator pedal to a throttle valve opening angle of 60 degrees.
Racing the engine above 4,700 rpm.
f. Check that the VSV for IAC valve is OFF (vent) under these conditions.
The engine is idling.
Releasing the accelerator pedal while under the 2 conditions in step (e).
If the result is not as specified, inspect the IAC valve, vacuum tank and VSV for normal operation.
Replace malfunctioning parts as necessary.
INSPECTION
1.INSPECT INTAKE AIR CONTROL VALVE ACTUATOR
a. Connect the MITYVAC (han
d-held vacuum pump) to the actuator.

If the result is not as specified, replace the VSV assy.
Fig. 8: Checking Air Flows From Port E To Port F

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.DRAIN ENGINE COOLANT
2.WORK FOR PREVENTING GASOLINE FROM SPILLING OUT
3.REMOVE V-BANK COVER
a. Remove the 2 nuts and V-bank cover.
4.REMOVE AIR CLEANER INLET NO. 1
5.REMOVE INTAKE AIR CONNECTOR PIPE
a. Disconnect the air hose and ventilation hose No. 1.
b. Remove the bolt, hose clamp and intake air connector pipe.

a. Install the cover bracket with the bolt.
Torque: 7.5 N.m (76 kgf.cm, 66 in.lbf)
23.INSTALL THROTTLE BODY ASSY
a. Install the throttle body with the 2 bolts and 2 nuts.
b. Connect the water by-pass hose.
c. Connect the PCV hose.
d. Connect the connector to the throttle body.
24.INSTALL INTAKE AIR CONNECTOR PIPE
a. Install the intake air connector pipe with the bolt and hose clamp.
Torque:
4.0 N.m (40 kgf.cm, 35 in.lbf) for hose clamp
5.0 N.m (50 kgf.cm, 44 in.lbf) for bolt
b. Connect the air hose and ventilation hose No. 1 together.
25.INSTALL AIR CLEANER INLET NO. 1
26.INSPECT FUEL PUMP OPERATION AND CHECK FOR FUEL LEAKS
27.INSTALL V-BANK COVER
a. Install the V-bank cover with the 2 nuts.
Torque: 5.0 N.m (50 kgf.cm, 44 in.lbf)
28.REFILL ENGINE COOLANT
29.CHECK FOR ENGINE COOLANT LEAKS
a. Check for engine coolant leaks.
If leaks are present, find the leak and repair or replace parts as necessar
y.

Fig. 52: Displaying Memory Copy/Paste Screen
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
This function cannot be used.
(f) If the symptom is applicable to any of the following, it is intended behavior, and not a malfunction.
DISPLAY CHART
SymptomAnswer
A longer route than expected is chosen.Depending on the road conditions, the navigation ECU
may determine that a longer route is quicker.
Even when distance priority is high, the
shortest route is not shown.Some paths may not be advised due to safety concerns.
When the vehicle is put into motion
immediately after the engine starts, the
navigation system deviates from the actual
position.
If the vehicle starts before the navigation system
activates, the system may not react.
When running on certain types of roads,
especially new roads, the vehicle position
deviates from the actual position.When the vehicle is driving on new roads not available
on the map disc, the system attempts to match it to
another nearby road, causing the position mark to
deviate.