Toyota Corolla Repair Manual: Inspection procedure
Hint
:
- if different dtcs related to different systems that have terminal e2
as the ground terminal are output
simultaneously, terminal e2 may be open.
- If dtc p0441 (purge flow), p0446 (vsv for ccv), p0451, p0452 or p0453
(evaporative pressure
sensor) is output with dtc p0442 or p0456, troubleshoot dtc p0441, p0446,
p0451, p0452 or
p0453 first. If no malfunction is detected, troubleshoot dtc p0442 or p0456
next.
- Read freeze frame data using the hand-held tester or the obd ii scan
tool. Freeze frame data records
the engine conditions when a malfunction is detected. When troubleshooting,
it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not,
the air–fuel ratio
was lean or rich, etc. At the time of the malfunction.
- If the engine run time in the freeze frame data is less than 200
seconds, carefully check the vapor
pressure sensor.
1 Inspect ecm(vc voltage)

- Turn the ignition switch on.
- measure the voltage between the terminals of the e3
ecm connector.
Standard:



2 Inspect ecm(ptnk voltage)

- Turn the ignition switch on.
- measure the voltage between the terminals of the e3 and
e6 ecm connectors.
- Disconnect the vacuum hose from the vapor pressure
sensor.
Standard (1):

- Using the mityvac (hand–held vacuum pump),
apply a vacuum of 4.0 Kpa (30 mmhg, 1.18 In.Hg)
to the vapor pressure sensor.
Notice
:
the vacuum applied to the vapor pressure sensor must be
less than 66.7 Kpa (500 mmhg, 19.7 In.Hg).
Standard (2):

- Reconnect the vacuum hose.


3 Check harness and connector(vapor pressure sensor – ecm)

- Disconnect the v4 vapor pressure sensor connector.
- disconnect the e3 and e6 ecm connectors.
- check the resistance between the wire harness side connectors.
Standard (check for open):

Standard (check for short):


- Reconnect the ecm connectors.
- reconnect the vapor pressure sensor connector.


Replace vapor pressure sensor assy
Dtc p0451, p0452 or p0453 is recorded by the ecm when the vapor pressure
sensor malfunctions.
P0451
The ecm senses pressure in the fuel tank using the vapor pressure sensor. The
ecm supplies t ...
Dtc p0500 vehicle speed sensor ”a” ...
Other materials:
Door control transmitter
Registration
1. Registration of recognition code
Hint:
the add mode is used to retain the already registered codes while
registering a new recognition code.
This mode is used when adding a transmitter. If the number of the registered
codes exceeds 4, the
previously registered code wi ...
Fuel gauge
Concept
The current fill level of the fuel tank is displayed.
General information
Vehicle tilt position may cause the display to
vary.
Information on refueling
Instrument cluster without
enhanced features: display
An arrow beside the fuel pump
symbol shows which side of the
vehicle the fuel filler ...
Run-flat tires
Concept
Run-flat tires permit continued driving under restricted
conditions even in the event of a complete
loss of tire inflation pressure.
General information
The wheels consist of tires that are self-supporting,
to a limited degree, and possibly special
rims.
The support of the sidewall allows t ...