Toyota 1 MZ–FE Manual page 577

DIAGNOSTIC CHART
TOYOTA hand – held tester
Check fuel pump operation.
Check for ECM power source circuit.
Check fuel pump.
Check for open in harness and connector between terminal
FP of DLC1 and fuel pump. fuel pump and body ground.
Connect the TOYOTA hand – held tester and check
operation of fuel pump.
Check circuit opening relay.
Check voltage terminal FC.
Check for open in harness and connector between ER
main relay and circuit opening relay, circuit opening relay
and ECM.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Go to step
Repair or replace.
Repair or replace fuel pump.
Go to step
Replace circuit opening relay.
Check and replace ECM.
EG2–577