Toyota 1 MZ–FE Manual page 571

DIAGNOSTIC CHART
TOYOTA hand–held tester
Connect the TOYOTA hand–held tester and check
operation of A/C idle–up VSV.
Check A/C idle–up VSV.
Check for open and short in harness and connector
between EFI main relay and ECM.
Check and replace ECM.
OBDII scan tool (excluding TOYOTA hand–held tester)
Check A/C idle–up VSV.
Check voltage between terminal ACV and body
ground.
Check air hose and air pipe.
Check and replace ECM.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Check and repair air hose and air pipe.
Replace A/C idle–up VSV.
Repair or replace harness or connector.
Replace A/C idle–up VSV.
Check and repair harness or connector.
Repair or replace.
EG2–571