Toyota 1 MZ–FE Manual page 495

DIAGNOSTIC CHART
Check spark plug and spark of misfiring cylinder.
Check voltage of ECM terminal for injector of failed
cylinder.
Check injector of misfiring cylinder.
Check for open and short in harness and connector between
injector and ECM.
Check fuel pressure.
Check injector injection.
Check EGR system.
Check mass air flow meter and engine coolant
temp. sensor.
Check engine mechanical systems.
1MZ–FE ENGINE – FE ENGINE TROUBLESHOOTING – CIRCUIT
INSPECTION
Replace or check ignition system.
Go to step
Replace injector.
Repair or replace fuel pump.
Replace injector.
Repair EGR system.
Repair or replace.
EG2–495