Toyota 1 MZ–FE Manual page 544

EG2–544
Check IAC valve.
Check for open and short in harness and
connector between J/B No.2 and IAC valve,
IAC valve and ECM (See page IN–31).
1MZ–FE ENGINE – CIRCUIT INSPECTION
Disconnect the IAC valve connector.
Check continuity between terminals RSO,
RSC and B of IAC valve connector.
Terminals
RSO and B
Terminals
RSC and B
Replace IAC valve.
Continuity
(Reference value 10 – 30W)
Continuity
W
(Reference value 10 – 30 )