Toyota RM787U, Service And Repair Manual, Page: 615 / 1976

- DIAGNOSTICS ENGINE
DI-77
231
Author: Date:
2001 SIENNA (RM787U)
11 Check for open and short in harness and connector between vapor pressure
sensor and ECM (See page
IN-31 ).
NG Repair or replace harness or connector.
OK
Replace vapor pressure sensor.
12 Check fuel tank and fuel tank over fill check valve for cracks and damage.
NG Replace fuel tank or fuel tank over fill check
valve.
OK
It is likely that vehicle user did not properly close fuel tank cap. Please explain to customer how
to properly install fuel tank cap.