Lexus NX manuals

Lexus NX: Camshaft Position "A" Actuator Circuit (Bank 1) (P0010)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Camshaft Position "A" Actuator Circuit (Bank 1) (P0010)

DESCRIPTION

The Variable Valve Timing (VVT) system adjusts the intake valve timing to improve driveability. The engine oil pressure turns the VVT controller to adjust the valve timing.

The camshaft timing oil control valve assembly is a solenoid valve and switches the engine oil line. The valve moves when the ECM applies 12 V to the solenoid. The ECM changes the energizing time to the solenoid (duty-cycle) in accordance with the camshaft position, crankshaft position, throttle position, etc.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0010

Camshaft Position "A" Actuator Circuit (Bank 1)

Open or short in camshaft timing oil control valve assembly circuit (1 trip detection logic).
  • Open or short in camshaft timing oil control valve assembly circuit
  • Camshaft timing oil control valve assembly
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs are designed to detect an open or short in the camshaft timing oil control valve assembly circuit. If the camshaft timing oil control valve assembly duty-cycle is excessively high or low while the power switch on (IG) or the engine is running, the ECM will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0010: Camshaft timing oil control valve assembly range check

Required Sensors/Components (Main)

Camshaft timing oil control valve assembly

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

1 second

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None

All of the following conditions are met

-

Starter

Off

Power switch

On (IG)

Time after power switch off to on (IG)

0.5 seconds or more
Case 1

Either of the following conditions is met

Condition A or B

A. Both of the following conditions are met

-

Auxiliary battery voltage

11 V or higher, and less than 13 V

Target duty cycle

Less than 70%

B. Both of the following conditions are met

-

Auxiliary battery voltage

13 V or higher

Target duty cycle

Less than 80%
Case 2

Current cut status

Not cut

TYPICAL MALFUNCTION THRESHOLDS

Case 1

Output duty cycle

100% or higher
Case 2

Output duty cycle

3% or less

COMPONENT OPERATING RANGE

Output duty cycle

Higher than 3%, and less than 100%

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG). and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the power switch off and wait for at least 30 seconds.
  5. Turn the power switch on (IG). and turn the Techstream on.
  6. Wait 5 seconds.
  7. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
  8. Read the pending DTCs.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  9. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  10. Input the DTC: P0010.
  11. Check the DTC judgment result.

    Techstream Display

    Description

    NORMAL
    • DTC judgment completed
    • System normal

    ABNORMAL
    • DTC judgment completed
    • System abnormal

    INCOMPLETE
    • DTC judgment not completed
    • Perform driving pattern after confirming DTC enabling conditions

    N/A
    • Unable to perform DTC judgment
    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system has a malfunction.
  12. If the judgment result shows INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs.

    Click here

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read freeze frame data using the Techstream. 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.

PROCEDURE

1.

READ OUTPUT DTC (DTC P0010)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Turn the Techstream on.

(d) Clear the DTC after recording the freeze frame data and DTC.

Click here

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the power switch off and wait for at least 30 seconds.

(f) Turn the power switch on (IG) and wait 5 seconds.

(g) Turn the Techstream on.

(h) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(i) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTC P0010 is output

A

DTCs are not output

B
B

CHECK FOR INTERMITTENT PROBLEMS

A

2.

INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

(a) Inspect the camshaft timing oil control valve assembly.

Click here

NG

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY - ECM)

(a) Disconnect the camshaft timing oil control valve assembly connector.

(b) Disconnect the ECM connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

C37-1 - C48-74 (OC1+)

Always

Below 1 Ω

C37-2 - C48-75 (OC1-)

Always

Below 1 Ω

C37-1 or C48-74 (OC1+) - Body ground

Always

10 kΩ or higher

C37-2 or C48-75 (OC1-) - Body ground

Always

10 kΩ or higher
OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

READ NEXT:

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SEE MORE:

 Disassembly

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 Components

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