Toyota RAV4 manuals

Toyota Sienna Service Manual: Camshaft Position "A" Actuator Circuit

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

DTC P0020 Camshaft Position "A" Actuator Circuit (Bank 2)

DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, Oil Control Valve (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 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 improves, 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.

DESCRIPTION

DTC No.

DTC Detection Condition

Trouble Area

P0010 Open or short in OCV for intake camshaft (bank 1) circuit (1 trip detection logic)
  • Open or short in OCV for intake camshaft (bank 1) circuit
  • OCV for intake camshaft (bank 1)
  • ECM
P0020 Open or short in OCV for intake camshaft (bank 2) circuit (1 trip detection logic)
  • Open or short in OCV for intake camshaft (bank 2) circuit
  •  OCV for intake camshaft (bank 2)
  •  ECM

MONITOR DESCRIPTION

After the ECM sends the "target" duty-cycle signal to the OCV, the ECM monitors the OCV current to establish an "actual" duty-cycle. The ECM detects a malfunction and sets a DTC when the actual dutycycle ratio varies from the target duty-cycle ratio.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

1 PERFORM ACTIVE TEST BY CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV)

  1. Connect the intelligent tester to the DLC3.
  2.  Start the engine and turn the tester on.
  3.  Warm up the engine.
  4.  On the tester, enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VVT CTRL B1 or VVT CTRL B2.
  5.  Check the engine speed while operating the Oil Control Valve (OCV) using the tester

OK

OK

2 INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

 INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

  1. Disconnect the C23 or C24 camshaft timing oil control valve (OCV) connector.
  2.  Measure the resistance according to the value(s) in the table below.

Standard resistance

Standard resistance

  1. Reconnect the OCV connector

3 CHECK HARNESS AND CONNECTOR (OCV - ECM)

CHECK HARNESS AND CONNECTOR (OCV - ECM)

  1. Disconnect the C23 or C24 camshaft timing oil control valve (OCV) connector.
  2.  Disconnect the E11 ECM connector.
  3.  Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open)

Standard resistance

Standard resistance (Check for short)

Standard resistance

  1. Reconnect the OCV connector.
  2.  Reconnect the ECM connector.

REPLACE ECM

Diagnostic trouble code chart
HINT: The parameters listed in the chart may not confirm exactly to those read during the DTC check due to the type of instrument or other factors. If a trouble code is displayed during the DTC ...

Camshaft Position "A" - Timing Over-Advanced
DTC P0011 Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1) DTC P0012 Camshaft Position "A" - Timing Over-Retarded (Bank 1) DTC P0021 Camshaft Positio ...

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ON-VEHICLE INSPECTION 1. INSPECT ENGINE OIL PRESSURE SWITCH ASSEMBLY  Disconnect the connector from the oil pressure switch assembly.  With the switch still installed, measure the resistance between the terminal of the engine oil pressure switch and engine ground. Standard ...

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