EC0HV±01
B04812
Gasket
B06544
Vacuum
Gauge
F12396
TOYOTA Hand±held Tester
B11799
± EMISSION CONTROLEVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC±7
2001 PRIUS (RM778U)
INSPECTION
1. REMOVE EXHAUST TAIL PIPE AND HEATED INSULA-
TOR (See page EM±84)
2. INSPECT LINES AND CONNECTORS
Visually check for loose connections, sharp bends or damage.
3. INSPECT FUEL TANK FILLER PIPE
Visually check for deformation, cracks or fuel leakage.
4. INSPECT FUEL TANK CAP
Visually check if the cap and/or gasket are deformed or dam-
aged.
If necessary, repair or replace the cap.
5. INSPECT EVAP SYSTEM LINE
(a) Warm up the engine and stop the engine.
Allow the engine to warm up to normal operating tempera-
ture.
(b) Install a vacuum gauge (EVAP control system test equip-
ment vacuum gauge) to the EVAP service port on the
purge line.
(c) TOYOTA hand±held tester:
Forced driving of the VSV for the EVAP.
(1) Connect a TOYOTA hand±held tester to the DLC3.
(2) Start the engine.
(3) Push the TOYOTA hand±held tester main switch
ON.
(4) Use the ACTIVE TEST mode on the TOYOTA
hand±held tester to operate the VSV for the EVAP.
(d) If you have no TOYOTA hand±held tester:
Forced driving of the VSV for the EVAP.
(1) Disconnect the VSV connector for the EVAP.
(2) Connect the positive (+) and negative (±) leads from
the battery to the VSV terminals for the EVAP.
(3) Start the engine.
SF1KN±01
± SFISFI SYSTEM
SF±1
1215 Author: Date:
2001 PRIUS (RM778U)
SFI SYSTEM
PRECAUTION
1. BEFORE WORKING ON THE FUEL SYSTEM , DIS-
CONNECT THE NEGATIVE (±) TERMINAL CABLE
FROM THE BATTERY AND HV BATTERY SERVICE
PLUG
HINT:
Any diagnostic trouble code retained by the computer will be
erased when the negative (±) terminal cable is removed from
the battery. Therefore, if necessary, read the diagnosis before
removing the negative (±) terminal cable from the battery.
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME
WHEN WORKING ON THE FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR
LEATHER PARTS
4. MAINTENANCE PRECAUTIONS
(a) In event of engine misfire, these precautions should be
taken.
(1) Check proper connection to battery terminals, etc.
(2) After repair work, check that the ignition coil termi-
nals and all other ignition system lines are recon-
nected securely.
(3) When cleaning the engine compartment, be espe-
cially careful to protect the electrical system from
water.
(b) Precautions when handling oxygen sensor.
(1) Do not allow oxygen sensor to drop or hit against an
object.
(2) Do not allow the sensor to come into contact with
water.
If vehicle is Equipped with Mobile Radio System (HAM, CB,
etc.)
If the vehicle is equipped with a mobile communication system,
refer to the precaution in the IN section.
5. AIR INDUCTION SYSTEM
(a) Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine to run out of turn.
(b) Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will allow air suction and cause the engine to run out
of turn.
6. ELECTRONIC CONTROL SYSTEM
(a) Before removing SFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch to LOCK or disconnecting the negative (±) terminal
cable from the battery.
HINT:
Always check the diagnostic trouble code before disconnecting
the negative (±) terminal cable from the battery.
