BE6653
A10606
A10607
A10628
VSV is ON
VSV is OFF
ON
Air
Air
E
F
E
F
-
DIAGNOSTICS
ENGINE
DI-85
239
Author:
Date:
2001 SIENNA (RM787U)
Check and replace ECM (See page
).
21
Check
VSV for pressure switching valve
.
PREPARATION:
(a)
Connect the TOYOTA hand-held tester to the DLC3.
(b)
Turn the ignition switch ON and push the TOYOTA hand-
held tester main switch ON.
(c)
Select the ACTIVE TEST mode on the TOYOTA hand-
held tester.
CHECK:
Check the VSV operation when it is operated by the TOYOTA
hand-held tester.
OK:
VSV is ON:
Air from port E flows out through port F.
VSV is OFF:
Air does not flow from port E to port F.
OK
Go to step 24.
NG
22
Check operation of VSV for pressure switching valve (See page
).
OK
Go to step 23.
NG
Replace VSV and charcoal canister, and then clean vacuum hose between charcoal canister and
VSV for pressure switching valve, and VSV for pressure switching valve and fuel tank.
23
Check for open and short in harness and connector between EFI main relay
(Marking: EFI) and VSV for pressure switching valve, and VSV for pressure
switching valve and ECM (See page
NG
Repair or replace harness or connector.
