Toyota 2GR-FE, Руководство пользователя

Страница: 262 / 1021

ES–106
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
2. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil
pressure supplied to the VVT controller. The VVT controller can advance or retard the exhaust
camshaft.
If the difference between the target and actual exhaust valve timings is large, and changes in actual
exhaust valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and
sets a DTC.
Example:
A DTC is set when the following conditions A, B and C are met:
(1)The difference between the target and actual exhaust valve timings is more than 5
°
CA
(Crankshaft Angle) and the condition continues for more than 4.5 seconds (Procedure "A").
(2)It takes 5 seconds or more to change the valve timing by 5
°
CA (Procedure "B").
(3)After above procedures "A" and "B" are met, the OCV is forcibly activated 63 times or more
(Procedure "C").
3. DTCs P0014 and P0024 (Advanced Cam Timing) are detected with 1 trip detection logic.
4. DTCs P0015 and P0025 (Retarded Cam Timing) are detected with 2 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to OCV malfunctions or the
presence of foreign objects in the OCV.
5. The monitor will not run unless the following conditions are met:
(a)The engine is warm (the engine coolant temperature is 75
°
C [167
°
F] or more).
(b)The vehicle has been driven at more than 40 mph (64 km/h) for 3 minutes.
(c) The engine has idled for 3 minutes.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Advanced camshaft timing:
Related DTCs
P0014: Advanced camshaft timing (bank 1)
P0015: Retarded camshaft timing (bank 1)
P0024: Advanced camshaft timing (bank 2)
P0025: Retarded camshaft timing (bank 2)
Required sensors / components (Main) VVT OCV and VVT Actuator
Required sensors / components (Related)
Crankshaft position sensor, Camshaft position sensor and Engine
coolant temperature sensor
Frequency of operation Once per driving cycle
Duration Within 10 seconds
MIL operation
Advanced camshaft timing (bank 1): Immediate
Advanced camshaft timing (bank 2): Immediate
Retarded camshaft timing (bank 1): 2 driving cycles
Retarded camshaft timing (bank 2): 2 driving cycles
Sequence of operation None
Monitor runs whenever following DTCs are not present
P0100 - P0103 (MAF sensor)
P0115 - P0118 (ECT sensor)
P0125 (insufficient ECT for closed loop)
P0335 (CKP sensor)
P0340, P0341 (CMP sensor)
P0351 - P0358 (ignitor)
Battery voltage 11 V or more
Engine RPM 500 to 4,000 rpm
Engine coolant temperature 75 to 100
°
C (167 to 212
°
F)
Valve timing No change
Valve timing Advanced position