HINT At the time of installation please refer to the following item Place a new

Hint at the time of installation please refer to the

This preview shows page 33 - 38 out of 66 pages.

HINT: At the time of installation, please refer to the following item. Place a new gasket on the air intake chamber. Torque: 19.5 N·m (200 kgf·cm, 14 ft·lbf)
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SF064–02 S04582 S04595 Throttle Stop Screw Vacuum No Clearance Throttle Lever S04594 VTA E2 VC Ohmmeter Vacuum SF–34 SFI THROTTLE BODY 885 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) INSPECTION 1. CLEAN THROTTLE BODY (a) Using a soft brush and carburetor cleaner, clean the cast parts. (b) Using compressed air, clean all the passages and aper- tures. NOTICE: To prevent deterioration, do not clean the throttle position sensor and IAC valve. 2. INSPECT THROTTLE VALVE (a) Apply vacuum to the throttle opener. (b) Check that there is no clearance between the throttle stop screw and throttle lever when the throttle valve is fully closed. 3. INSPECT THROTTLE POSITION SENSOR (a) Apply vacuum to the throttle opener. (b) Using an ohmmeter, measure the resistance between each terminal. Throttle valve condition Between terminals Resistance Fully closed VTA – E2 0.2 – 5.7 k Fully open VTA – E2 2.0 – 10.2 k VC – E2 2.5 – 5.9 k
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SF065–01 SFI THROTTLE BODY SF–35 886 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) INSTALLATION Installation is in the reverse order of removal (See page SF–33 ).
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S04529 DLC1 E1 TE1 DLC1 SST S04533 RSC +B RSO Ohmmeter SF066–01 S04529 E1 DLC1 TE1 DLC1 SST SF–36 SFI IDLE AIR CONTROL (IAC) VALVE 887 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) IDLE AIR CONTROL (IAC) VALVE ON–VEHICLE INSPECTION 1. INSPECT IAC VALVE OPERATION (a) Initial conditions: z Engine at normal operating temperature z Idle speed checked correctly z Transmission in neutral position z A/C switch OFF (b) Using SST, connect terminals TE1 and E1 of the DLC1. SST 09843–18020 (c) After engine speed is kept at approx. 1,000 rpm for 5 se- conds, check that it returns to idle speed. If the engine speed operation is not as specified, check the IAC valve, wiring and ECM. (d) Remove the SST from the DLC1. SST 09843–18020 2. INSPECT IAC VALVE RESISTANCE NOTICE: ”Cold” and ”Hot” in the following sentences express the temperature of the coils themselves. ”Cold” is from –10 ° C (14 ° F) to 50 ° C (122 ° F) and ”Hot” is from 50 ° C (122 ° F) to 100 ° C (212 ° F). (a) Disconnect the IAC valve connector. (b) Using an ohmmeter, measure the resistance between ter- minal +B and other terminals (RSC, RSO). Resistance: Cold: 17.0 – 24.5 Hot: 21.5 – 28.5 If resistance is not as specified, replace the IAC valve. (c) Reconnect the IAC valve connector. 3. INSPECT AIR ASSIST SYSTEM (a) Initial conditions: z Engine at normal operating temperature z Idle speed checked correctly z Transmission in neutral position z A/C switch OFF (b) Using SST, connect terminals TE1 and E1 of the DLC1. SST 09843–18020 (c) After engine speed is kept at 900 – 1,300 rpm for 10 se- conds, check that it returns to idle speed.
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S05510 Plug Disconnect Plug SFI IDLE AIR CONTROL (IAC) VALVE SF–37 888 AuthorĂ: DateĂ: 1997 LEXUS ES300 (RM511U) (d) Stop the engine. (e) Disconnect the air assist hose from the air pipe, and block off the IAC valve exit and the entry to the pipe.
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