2003 LEXUS LS430 Identifying ac

Fig. 9: Identifying Connector Terminals Heated Oxygen Sensor
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c. Bank 1 sensor 2, bank 2 sensor 2:
Disconnect the sensor connector.
d. Measure the resistance between terminals 1 (HT) and 2 (+B).
Standard:
RESISTANCE CONDITION
If the result is not as specified, replace the sensor.
ConditionSpecified Condition
20°C (68°F)11 to 16 ohms

Fig. 10: Identifying Connector Terminals Heated Oxygen Sensor
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INSPECTION
1.INSPECT CHARCOAL CANISTER ASSY
a. Visually check the charcoal canister for cracks or damage.
If cracks or damage are found, replace the canister.

Fig. 28: Identifying Components Charcoal Canister Assy
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REPLACEMENT
1.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

LOCATION
Fig. 1: Identifying Engine Control System Location

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ON-VEHICLE INSPECTION
1.INSPECTION THROTTLE BODY
a. 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. The motor should be running smoothly without friction sounds.
If operation is not as specified, check the throttle control motor, wiring and ECM (see DTC P2118:
THROTTLE ACTUATOR CONTROL MOTOR CURRENT RANGE/PERFORMANCE ).
Fig. 3: Identifying Throttle Body

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b. Inspect the throttle position sensor.

INSPECTION
1.INSPECT MASS AIR FLOW METER
Fig. 6: Identifying Connector Terminals

Fig. 15: Identifying Throttle Body Assy Components
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REPLACEMENT
1.DRAIN ENGINE COOLANT (See ENGINE COOLANT
)
2.REMOVE V-BANK COVER
a. Remove the 2 nuts and V-
bank cover.

Fig. 22: Removing Bolts And Disconnecting Engine Wire Protector
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k. Disconnect the 2 wire clamps on the engine wire (RH side) from the brackets on the RH delivery
pipe.
l. Remove the 2 bolts, and disconnect the engine wire protector (rear side) from the rear water bypass
joint and RH cylinder head.
m. Disconnect the 8 injector connectors.
Fig. 23: Identifying Bolts

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n. Remove the 6 bolts, 4 nuts, the upper and lower intake manifolds assembly and 2 gaskets.
8.REMOVE KNOCK SENSOR