Toyota T100 1996 Service Manual page 476

DI−212
DTC P0441
CIRCUIT DESCRIPTION
The vapor pressure sensor and VSV for vapor pressure sensor are used to detect abnormalities in the evap-
orative emission control system.
The ECM decides whether there is an abnormality in the evaporative emission control system based on the
vapor pressure sensor signal.
DTCs P0441 and P0446 are recorded by the ECM when evaporative emissions leak from the components
within the dotted line in fig. 1 below, or when there is a malfunction in either the VSV for EVAP, the VSV for
vapor pressure sensor, or in the vapor pressure sensor itself.
fig. 1
DTC No.
Pressure in charcoal canister does not drop during purge
control (2 trip detection logic)
P0441
During purge cut−off, pressure in charcoal canister is very
low compared with atmospheric pressure
(2 trip detection logic)
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
Evaporative Emission Control System
Incorrect Purge Flow
(6)
VSV
for EVAP
(5)
Charcoal Canister
DTC Detecting Condition
− ENGINE (5VZ−FE)
ECM
(1)
VSV for Vapor
(4) Pressure Sensor
S Open or short in VSV circuit for EVAP
S Open or short in VSV circuit for vapor pressure sensor
S Open or short in vapor pressure sensor circuit
S VSV for EVAP
S VSV for vapor pressure sensor
S Vapor pressure sensor
S Vacuum hose cracks, holed blocked, damaged or
disconnected ((1), (4), (5) and (6) in fig. 1)
S Charcoal canister cracks, holed or damaged
Vapor Pressure
Sensor
(2)
(3)
Fuel Tank
Trouble Area
DI9AE−01
S00044