Toyota 1 MZ–FE Manual page 579

OBD ll scan tool (excluding 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.
Check circuit opening relay.
Check voltage terminal FC.
Check for open in harness and connector between
EFI main relay and ECM.
Check voltage terminal 3 of circuit opening relay.
Check for open in harness and connector between terminal
6 of circuit opening relay and body ground.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Go to step
Repair or replace.
Repair or replace fuel pump.
Replace circuit opening relay.
Check and replace ECM.
Repair or replace harness or connector.
Check for starter signal circuit.
EG2–579