Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Crankshaft position – camshaft
position correlation / Circuit description
Toyota Corolla (E120): Circuit description
Refer to dtc p0335
Dtc no. |
Dtc detection condition |
Trouble area |
P0016 | Deviation in crankshaft position sensor signal and camshaft position sensor signal (2 trip detection logic) |
|
Monitor description
The ecm optimizes the valve timing using the variable valve timing (vvt) system to control the intake valve camshaft. The vvt system includes the ecm, the oil control valve (ocv) and the vvt controller. The ecm sends a target ”duty–cycle” control signal to the ocv. This control signal, applied to the ocv, regulates the oil pressure supplied to the vvt controller. The vvt controller can advance or retard the intake valve camshaft.
The ecm calibrates the valve timing of the vvt system by setting the camshaft to the maximum retard angle when the engine speed is idling. The ecm closes the ocv to retard the cam. The ecm stores this valve as ”vvt learned value” (when the difference between the target valve timing and the actual valve timing is 5 or less, the ecm learns it).
If the learned value meets both of the following conditions (”a” and ”b”), the ecm interprets this as a defect in the vvt system and set a dtc.
- ”vvt learning” value is less than 24 ca, or more than 46 ca.
- above condition continues for more than 18 seconds.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Refer to dtc p0335
Other materials:
Refueling
Opening the fuel tank cap
Perform the following steps
to open the fuel tank cap:
Before refueling the vehicle
Turn the engine switch off and
ensure that all the doors and
windows are closed.
Confirm the type of fuel.
■Fuel tank opening for unleaded
gasoline
To help prevent incorrect fueling, ...
Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm:
● Unlock the doors or open the trunk.
● Vehicles without a smart key system:
Turn the engine switch to the “ACC” or “ON” position, or start the engine. (The
alarm will be deactivated or stopped after a few seconds.)
& ...
Exhaust gas precautions
Harmful substance to the human body is included in exhaust gases if inhaled.
CAUTION
Exhaust gases include harmful carbon monoxide (CO), which is colorless and odorless.
Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to an
accident c ...