1998 TOYOTA LAND CRUISER Factory Repair Manual

alternator belt power steering fluid oil additives fuse fuel tank capacity ground clearance

Load previous 8 pages

Page 1313 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual A19639VSV is OFF VSV is ON CCV
Air
E Air
E
FF
E5
DI-264
- DIAGNOSTICSENGINE
457 Author: Date:
15 Check operation of EVAP VSV (See page SF-44).
NG Replace EVAP VSV.
OK
16 Check for open and short in

Page 1314 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual - DIAGNOSTICSENGINE
DI-265
458 Author: Date:
18 Check operation of CCV (See page SF-48).
NG Replace CCV.
OK
19 Check for open and short in harness and connector between EFI or ECD relay
and CCV, and

Page 1315 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual A19641VSV is ON VSV is OFFTBP
Air
E Air
E
FF
E9
DI-266
- DIAGNOSTICSENGINE
459 Author: Date:
20 Check pressure switching valve.
PREPARATION:
Turn the ignition switch ON.
CHECK:
Check the VSV functio

Page 1316 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual - DIAGNOSTICSENGINE
DI-267
460 Author: Date:
22 Check for open and short in harness and connector between EFI or ECD relay
and pressure switching valve, and pressure switching valve and ECM (See pag

Page 1317 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual DI-268
- DIAGNOSTICSENGINE
461 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0451 Evaporative Emission Control System Pres-
sure Sensor/Switch Range/Performance
DTC P0452 Evaporative Emission Con

DI-268
- DIAGNOSTICSENGINE
461 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0451 Evaporative Emission Control System Pres-
sure Sensor/Switch Range/Performance
DTC P0452 Evaporative Emission Control System Pres-
sure Sensor/Switch Low Input
DTC P0453 Evaporative Emission Control System Pres-
sure Sensor/Switch High Input
MONITOR DESCRIPTION
DTC ºP0451, P0452 or P0453º is recorded by the ECM when the vapor pressure sensor malfunctions.
P0451
The ECM sensor pressure in the fuel tank using the vapor pressure sensor. The ECM supplies the sensor
with a regulated 5 V reference voltage and the sensor returns a signal voltage between 0.5 V and 4.5 V ac-
cording to the pressure level in the fuel tank.
When the pressure in the fuel tank is low, the output voltage of the vapor pressure sensor is low. When it
is high, the output voltage is high.
For this DTC P0451, the ECM checks for a ºnoisyº sensor or a ºstuckº sensor.
The ECM checks for a ºnoisyº sensor by monitoring the fuel tank pressures when the vehicle is stationary
and there should be little variation in the tank pressure. If the indicated pressure varies beyond specified
limits, the ECM will illuminate the MIL (2-trip detection logic) and a DTC is set.
The ECM checks for a ºstuckº sensor by monitoring the fuel tank pressure for an extended time period. If
the indicated pressure does not change over this period, the ECM will conclude that the fuel tank pressure
sensor is malfunctioning, The ECM will illuminate the MIL and a DTC is set.
P0452 and P0453
The ECM sensor pressure in the fuel tank using the vapor pressure sensor. The ECM supplies the sensor
with a regulated 5 V reference voltage and the sensor returns a signal voltage between 0.5 V and 4.5 V ac-
cording to the pressure level in the fuel tank.
If the output voltage of the vapor pressure sensor is out of normal range, the ECM will determine that there
is a malfunction in the sensor or sensor circuit.
When pressure indicated by the vapor pressure sensor deviates below -3.999 kPa (-30 mmHg, -1.18 in.Hg)
or above 1.999 kPa (15 mmHg, 0.59 in.Hg), the ECM interprets this as a malfunction in the vapor pressure
sensor. The ECM will turn on the MIL and a DTC will be set.
DIC2J-01

Page 1318 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual - DIAGNOSTICSENGINE
DI-269
462 Author: Date:
2004 LAND CRUISER (RM1071U)DTC No.
DTC Detecting ConditionTrouble Area
P0451
Vapor pressure sensor output extremely changes under condi-
tions of (a) a

Page 1319 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual DI-270
- DIAGNOSTICSENGINE
463 Author: Date:
2004 LAND CRUISER (RM1071U)
TYPICAL ENABLING CONDITIONS
P0451
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are

Page 1320 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual - DIAGNOSTICSENGINE
DI-271
464 Author: Date:
2004 LAND CRUISER (RM1071U)
TYPICAL MALFUNCTION THRESHOLDS
P0451
Detection CriteriaThreshold
Signal fluctuation (noise) monitoring:
The number of times

Load next 8 pages

Page: < prev 1-10 ... 1281-1288 1289-1296 1297-1304 1305-1312 1313-1320 1321-1328 1329-1336 1337-1344 1345-1352 ... 3120 next >

check transmission fluid turn signal bulb open hood fuel type wheel alignment service interval