Toyota
Camry ACV40 GSV40
Repair Manual
2Az-Fe Engine Control System
Sfi System
Perform active test using intelligent tester (operate camshaft timing oil control valve)
Check harness and connector (camshaft timing oil control valve assembly - ecm)
DTC P0010 Camshaft Position "A" Actuator Circuit (Bank 1)
DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM, intake camshaft timing oil control valve assembly and VVT controller. The ECM sends a target duty-cycle control signal to the intake camshaft timing oil control valve assembly. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as intake air volume, throttle valve position and engine coolant temperature. The ECM controls the camshaft timing oil control valve assembly, based on the signals transmitted from several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the camshaft timing oil control valve assembly. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control. This is how the target intake valve timing is verified by the ECM.
| DTC No. | DTC Detection Condition | Trouble Area |
| P0010 | Open or short in camshaft timing oil control valve assembly circuit (1 trip detection logic) |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
- HINT:
- Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
Connect the intelligent tester to the DLC3.
Start the engine.
Turn the tester on.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Linear (Bank 1).
Check the engine speed while operating the camshaft timing oil control valve assembly using the tester.
- OK:
Tester Operation Specified Condition 0% Normal engine speed 100% Engine idles roughly or stalls
| Go to step 2 | |||
| OK | |
 | |
| CHECK FOR INTERMITTENT PROBLEMS (Click here) | |
Remove the camshaft timing oil control valve assembly.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
Tester Connection Condition Specified Condition 1 - 2 20°C (68°F) 6.9 to 7.9 Ω
Text in Illustration *1 Component without harness connected
(Camshaft Timing Oil Control Valve Assembly)
Connect the positive (+) battery terminal to terminal 1 and connect the negative (-) battery terminal to terminal 2. Check the valve operation.
- OK:
- Valve moves quickly.
Reinstall the camshaft timing oil control valve assembly.
| REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (Click here) | |||
| OK | |
 |
Disconnect the camshaft timing oil control valve assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance (Check for Open):
Tester Connection Condition Specified Condition C32-1 - C24-100 (OC1+) Always Below 1 Ω C32-2 - C24-123 (OC1-) Always Below 1 Ω
- Standard Resistance (Check for Short):
Tester Connection Condition Specified Condition C32-1 or C24-100 (OC1+) - Body ground Always 10 kΩ or higher C32-2 or C24-123 (OC1-) - Body ground Always 10 kΩ or higher
Reconnect the camshaft timing oil control valve assembly connector.
Reconnect the ECM connector.
| REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM) | |||
| OK | |
| |
| REPLACE ECM (Click here) | |