Toyota Tundra Service Manual: Camshaft Position "A" Actuator Circuit (Bank 1) (P0010,P0020)

Toyota Tundra Service Manual / Engine, Hybrid System / 1ur-fe Engine Control / Sfi System / Camshaft Position "A" Actuator Circuit (Bank 1) (P0010,P0020)

DESCRIPTION

  • This DTC is designed to detect opens or shorts in the camshaft oil control valve (OCV) circuit. If the OCV's duty-cycle is excessively high or low while the engine is running, the ECM will illuminate the MIL and store the DTC.
  • The VVT (variable valve timing) system adjusts the intake and exhaust valve timing to improve driveability. The engine oil pressure turns the camshaft actuator to adjust the valve timing. The OCV 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.

DTC Detection Condition

Trouble Area

P0010

Open or short in OCV (for intake side of bank 1) circuit

(1 trip detection logic)

  • Open or short in OCV (for intake side of bank 1) circuit
  • OCV (for intake side of bank 1)
  • ECM

P0020

Open or short in OCV (for intake side of bank 2) circuit

(1 trip detection logic)

  • Open or short in OCV (for intake side of bank 2) circuit
  • OCV (for intake side of bank 2)
  • ECM

HINT:

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

MONITOR DESCRIPTION

This DTC is designed to detect opens or shorts in the camshaft oil control valve (OCV) circuit. If the OCV's duty-cycle is excessively high or low while the engine is running, the ECM will illuminate the MIL and store the DTC.

MONITOR STRATEGY

Related DTCs

P0010: VVT OCV range check (Bank 1)

P0020: VVT OCV range check (Bank 2)

Required Sensors/Components (Main)

VVT OCV

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 following DTCs not present

None

All of following conditions met

-

Starter

OFF

Ignition switch

ON

Time after ignition switch off to ON

0.5 seconds or more

Case 1

One of following conditions met

-

A. All of following conditions met

-

Battery voltage

11 to 13 V

Target duty ratio

Less than 70%

B. All of following conditions met

-

Battery voltage

13 V or more

Target duty ratio

Less than 80%

Case 2

Current cut status

Not cut

TYPICAL MALFUNCTION THRESHOLDS

Case 1

Output duty cycle

100% or more

Case 2

Output duty cycle

3% or less

COMPONENT OPERATING RANGE

VVT OCV duty cycle

3 to 100%

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the ignition switch to ON and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON 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 or P0020.
  11. Check the DTC judgment result.

    Tester 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
  12. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).

    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. Freeze frame data records 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.
  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

PROCEDURE

1.

CHECK FOR DTC

(a) Clear DTCs after recording the freeze frame data and DTCs (See page ).

(b) Turn the ignition switch off.

(c) Allow the engine to idle and check for DTCs.

(d) Check that P0010 or P0020 is not present.

OK:

P0010 or P0020 is not present.

OK

CHECK FOR INTERMITTENT PROBLEMS

NG

2.

INSPECT CAMSHAFT OIL CONTROL VALVE

(a) Disconnect the OCV connector.

(b) 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

NG

REPLACE CAMSHAFT OIL CONTROL VALVE

OK

3.

CHECK HARNESS AND CONNECTOR (OCV - ECM)

(a) Disconnect the OCV 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

D75-1 - D74-58 (OC1+)

Always

Below 1 Ω

D75-2 - D74-57 (OC1-)

Always

Below 1 Ω

D76-1 - D74-52 (OC2+)

Always

Below 1 Ω

D76-2 - D74-51 (OC2-)

Always

Below 1 Ω

D75-1 or D74-58 (OC1+) - Body ground

Always

10 kΩ or higher

D75-2 or D74-57 (OC1-) - Body ground

Always

10 kΩ or higher

D76-1 or D74-52 (OC2+) - Body ground

Always

10 kΩ or higher

D76-2 or D74-51 (OC2-) - Body ground

Always

10 kΩ or higher

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

    MAP - Mass or Volume Air Flow Correlation Bank 1 (P006A)

    Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1) (P0011,P0012,P0021,P0022)

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