Toyota 1 MZ–FE Manual page 454

EG2–454
INSPECTION PROCEDURE
HINT: If diagnostic trouble codes "P0110" (intake air temp. circuit malfunction), "P0115" (engine
coolant temp. circuit malfunction), "P0120" (throttle position circuit malfunction) are output
simultaneously, E2 (sensor ground) may be open.
1 Connect the OBDII scan tool or TOYOTA hand–held tester, and read
value of intake air temperature.
Check for intermittent problems.
(See page EG2–417)
1MZ–FE ENGINE – CIRCUIT INSPECTION
(1) Remove the fuse cover on the instrument
panel.
(2) Connect the OBDII scan tool or TOYOTA
hand–held tester to the DLC 3.
(3) Turn ignition switch ON and OBDII scan tool
or TOYOTA hand–held tester main switch
ON.
Read temperature value on the OBDII scan tool or
TOYOTA hand–held tester.
Same as actual intake air temperature.
If there is open circuit, OBDII scan tool or
TOYOTA hand–held tester indicates – 40 C
(– 40 F).
If there is short circuit, OBDII scan tool or
TOYOTA hand–held tester indicates 120 C
(248 F) or more.
– 40 C (– 40 F) ........... Go to step
120 C (248 F) or more ... Go to step
2
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