Toyota 1 MZ–FE Manual page 272

EG2–272
1MZ–FE ENGINE – SFI SYSTEM
(d) Remove the SST from the DLC1.
SST 09843–18020
2. INSPECT IAC VALVE RESISTANCE
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between
terminal +B and other terminals (RSC, RSO).
Resistance:
19.3 – 22.3Ω at 20°C (68°F)
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.
3. INSPECT AIR ASSIST SYSTEM
(a) Initial conditions:
Engine at normal operating temperature
Idle speed set correctly
Transmission in neutral position
A/C switch OFF
(b) Using SST, connect terminals TE1 and E1 of the DLC
1.
SST 09843–18020
(c) After engine speed are kept at 900 – 1,300 rpm for
10 seconds, check that they return to idle speed.
(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.
(f) Start the engine and check that the idle speed reaches
500 rpm or below (the engine may stall).
If the idle does not reach 500 rpm or below, check for
a leak between the air pipe and injector.