1999 TOYOTA CAMRY Service Repair Manual

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Page 1529 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±317
552 Author: Date:
12 Check fuell tank and fuel tank over fill check valve for cracks and damage.
(See page EC±2)
NG Replace fuel tank or fuel tank over fill c

Page 1530 of 4592

TOYOTA CAMRY 1999 Service Repair Manual A01654
ECM
Vapor Pressure
Sensor
VSV for Vapor
Pressure Sensor
Fuel Tank Charcoal Canister VSV
for EVAP(1)
(2)
(3) (4)
(5) fig. 1
(6)
(7)
(8)
(9)Fuel Tank Over
Fill Check Valve DI±318
± DIAGNOSTICSE

Page 1531 of 4592

TOYOTA CAMRY 1999 Service Repair Manual ± DIAGNOSTICSENGINE (1MZ±FE)
DI±319
554 Author: Date:
DTC No.DTC Detecting ConditionTrouble Area
Pressure in charcoal canister does not drop during purge con-
trol (2 trip detection logic)
P0441D

± DIAGNOSTICSENGINE (1MZ±FE)
DI±319
554 Author: Date:
DTC No.DTC Detecting ConditionTrouble Area
Pressure in charcoal canister does not drop during purge con-
trol (2 trip detection logic)
P0441During purge cut±off, pressure in charcoal canister is very low
compared with atmospheric pressure
(2 trip detection logic)Open or short in VSV circuit for EVAP
Open or short in VSV circuit for vapor pressure sensor

Open or short in vaporpressure sensor circuit
When VSV for vapor pressure sensor is OFF, ECM judges that
there is no continuity between vapor pressure sensor and
charcoal canister (2 trip detection logic)
Open or short in vapor pressure sensor circuit
VSV for EVAP
VSV for vapor pressure sensor
Vapor pressure sensor
P0446
When VSV for vapor pressure sensor is ON, ECM judges that
there is no continuity between vapor pressure sensor and fuel
tank (2 trip detection logic)
Va o r ressure sensor
Vacuum hose cracks, holed blocked, damaged or
disconnected ((1), (4), (5),(6) and (7) in fig. 1)
Charcoal canister cracks, holed or damaged
F l t k fill h k l k d d dAfter purge cut off operates, pressure in charcoal canister is
maintained at atmospheric pressure
(2 trip detection logic)Fuel tank over fill check valve cracked or damaged
WIRING DIAGRAM
Refer to DTC P0440 (Evaporative Emission Control System Malfunction) on page DI±311 for the WIRING
DIAGRAM.
INSPECTION PROCEDURE
HINT:
If DTCs P0441, P0446, P0450 or P0451 is output after DTC P0440, first troubleshoot DTCs P0441,
P0446, P0450 or P0451. If no malfunction is detected, troubleshoot DTC P0440 next.
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.
When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
VSV for EVAP, charcoal canister and vapor pressure sensor.
TOYOTA hand±held tester
1 Check VSV connector for EVAP, VSV connector for vapor pressure sensor and
vapor pressure sensor connector for looseness and disconnection.
NG Repair or connect VSV or sensor connector.
OK

Page 1532 of 4592

TOYOTA CAMRY 1999 Service Repair Manual DI±320
± DIAGNOSTICSENGINE (1MZ±FE)
555 Author: Date:
2 Check vacuum hoses (1), (4), (5), (6), (7) and (8) on page DI±311).
CHECK:
(a) Check that the vacuum hose is connected correctly.
(b) Chec

Page 1533 of 4592

TOYOTA CAMRY 1999 Service Repair Manual A00230
VSV is ON
VSV is OFF
S04610
S04609
± DIAGNOSTICSENGINE (1MZ±FE)
DI±321
556 Author: Date:
6 Check purge flow.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Select

Page 1534 of 4592

TOYOTA CAMRY 1999 Service Repair Manual DI±322
± DIAGNOSTICSENGINE (1MZ±FE)
557 Author: Date:
8 Check operation of VSV for EVAP (See page SF±58).
OK Go to step 9.
NG
Replace VSV and charcoal canister, and then clean the vacuum hose

Page 1535 of 4592

TOYOTA CAMRY 1999 Service Repair Manual BE6653
S00558 S00557A00474
ON
Air
E Air
E
F
F GG VSV is OFF VSV is ON
± DIAGNOSTICSENGINE (1MZ±FE)
DI±323
558 Author: Date:
10 Check VSV for vapor pressure sensor.
PREPARATION:
(a) Connect the T

Page 1536 of 4592

TOYOTA CAMRY 1999 Service Repair Manual A07146PTNK (+) E2 (±)
VSV Connector
for Vapor Pressure
Sensor
DI±324
± DIAGNOSTICSENGINE (1MZ±FE)
559 Author: Date:
12 Check for open and short in harness and connector between EFI main relay
(M

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