Toyota 1 MZ–FE Manual page 465

DIAGNOSTIC CHART
HINT: If diagnostic trouble codes P0110, P01 15 and P0120 are output simultaneously, E2 (sensor
ground) may be open.
TOYOTA hand–held tester
Connect the TOYOTA hand–held tester and read
the throttle valve opening percentage.
Read closed throttle position switch condition.
Check voltage of terminal VC.
Check throttle position sensor.
Check voltage of terminal VTA and E2 of ECM.
Check and replace ECM.
Check voltage of terminal VC and E2 of ECM.
Check for open in harness and connector between ECM and
sensor (VC line).
1MZ–FE ENGINE – CIRCUIT INSPECTION
Check for intermittent problems.
G o to step
Go to step
Replace throttle position sensor.
Check for open and short in harness and
connector between ECM and throttle
position sensor (VTA line).
Check and replace ECM.
EG2–465