Toyota T100 1996 Service Manual page 489

10 Check operation of VSV for vapor pressure sensor.
OK
11 Check for open and short in harness and connector between EFI main relay
(Marking: EFI), VSV for vapor pressure sensor and ECM (See page IN−26).
OK
Check and replace ECM (See page IN−26).
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS − ENGINE (5VZ−FE)
NG Replace VSV.
NG Repair or replace harness or connector.
DI−225