Toyota Celica 2005, Руководство по ремонту

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− DIAGNOSTICS ENGINE (1ZZ − FE)
DI − 53
2005 CELICA (RM1131U)
DTC P0011 Camshaft Position ”A” − Timing Over − Ad-
vanced or System Performance (Bank 1)
DTC P0012 Camshaft Position ”A” − Timing Over − Re-
tarded (Bank 1)
CIRCUIT DESCRIPTION
Refer to DTC P0010 on page DI − 48.
DTC Detecting Condition Trouble Area
P0011
Valve timing does not change at advanced position (1 trip
detection logic) when:
S
Engine is warmed − up
S Engine speed is less than 4000 rpm
S VVT controller assembly
S OCV
S Valve timing
S ECM
P0012
Valve timing does not change at retarded position (2 trip
detection logic) when:
S Engine is warmed − up
S Engine speed is less than 4000 rpm
MONITOR DESCRIPTION
The ECM optimizes the valve timing using the VVT (Variable Valve Timing) system to control the intake valve
camshaft. The VVT system includes the ECM, the OCV (Oil Control Valve) and the VVT controller. The ECM
sends a target ”duty
− cycle” control signal to the OCV. This control signal, sent to the OCV, regulates the oil
pressure applied to the VVT controller. The VVT controller can advance or retard the intake valve camshaft.
Example:
A DTC will be set if: 1) the difference between the target and actual valve timing is more than 5 degrees of
the crankshaft angle (CA) and the condition continues for more than 5 sec.; or 2) the OCV is forcibly activated
63 times or more.
Advanced cam DTCs are subject to ”1 trip” detection logic.
Retarded cam DTCs are subject to ”2 trip” detection logic.
MONITOR STRATEGY
Related DTCs
P0011 VVT system advance (Bank 1)
P0012 VVT system retard (Bank 1)
Required sensors/components
Main sensors/components Camshaft position sensor
Related sensors/components
Engine coolant temperature sensor,
Crankshaft position sensor
Frequency of operation Once per drive cycle
Duration 10 sec.
MIL operation
P0011: Immediate
P0012: 2 driving cycles
Sequence of operation None
DIAIU − 03
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