Brand:

Toyota

Model Name:

Yaris NCP90 91 92 93

Manual:

Repair Manual

Section:

1Nz-Fe Engine Control System

Title:

Sfi System

  1. Description

  2. Wiring diagram

  3. Inspection procedure

  4. Perform active test using intelligent tester (operate ocv)

  5. Inspect camshaft timing oil control valve assembly

  6. Check harness and connector (ocv - ecm)

DTC P0010 Camshaft Position "A" Actuator Circuit (Bank 1)

HINT:
This DTC relates to the Oil Control Valve (OCV).

DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, OCV and VVT controller. The ECM sends a target duty-cycle control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature. The ECM controls the OCV, based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. 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.

Open or short in OCV circuit Yaris


DTC No.
DTC Detection Conditions
Trouble Areas
P0010
Open or short in OCV circuit
(1 trip detection logic)
  1. Open or short in OCV circuit
  2. OCV
  3. ECM

WIRING DIAGRAM


Connect an intelligent tester to the DLC3. Yaris


INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. Freeze frame data record the engine condition when malfunctions are detected. 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.
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OCV)

  1. Connect an intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Warm up the engine.

  1. Select the following menu items: Powertrain / Engine and ECT / Active Test / Activate the VVT System (Bank 1).

  1. Check the engine speed while operating the Oil Control Valve (OCV) using the tester.

    OK:
    Tester Operations
    		Specified Conditions
    OCV OFF
    		Normal engine speed
    OCV ON
    		Engine idles roughly or stalls
    (soon after OCV switched from OFF to ON)


OKnext
CHECK FOR INTERMITTENT PROBLEMS (Click here)
NG
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2.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
  1. Disconnect the C24 OCV connector. Yaris

  2. Disconnect the C24 OCV connector.

  1. Measure the resistance between the terminals of the OCV.

    Standard resistance:
    6.9 to 7.9 Ω at 20°C (68°F)

  1. Reconnect the OCV connector.



NGnext
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (Click here)
OK
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3.CHECK HARNESS AND CONNECTOR (OCV - ECM)
  1. Disconnect the C24 OCV connector. Yaris

  2. Disconnect the C24 OCV connector.

  1. Disconnect the C20 ECM connector.

  1. Check the resistance.

    Standard resistance (Check for open):
    Tester Connections
    		Specified Conditions
    OC1+ (C24-1) - OC1+ (C20-100)
    		Below 1 Ω
    OC1- (C24-2) - OC1- (C20-123)
    Standard resistance (Check for short):
    Tester Connections
    		Specified Conditions
    OC1+ (C24-1) or OC1+ (C20-100) - Body ground
    		10 kΩ or higher
    OC1- (C24-2) or OC1- (C20-123) - Body ground

  1. Reconnect the OCV connector.

  1. Reconnect the ECM connector.



NGnext
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK
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REPLACE ECM (Click here)