Toyota RM787U, Service And Repair Manual, Page: 649 / 1976

- DIAGNOSTICS ENGINE
DI-1 11
265
Author: Date:
2001 SIENNA (RM787U)
3 Check for open and short in harness and connector between ECM and A/F sen-
sors (bank 1, 2 sensor 1) (See page
IN-31 ).
NG Repair or replace harness or connector.
OK
4 Check resistance of A/F sensor heater (See page SF-81 ).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF-1 ).
NG Repair or replace.
OK
6 Check fuel pressure (See page SF-6 ).
NG Check and repair fuel pump, fuel pipe line and
filter (See page
SF-1 ).
OK