Lexus ES manuals

Lexus ES: Actuator Cut Circuit Stuck Off (P16B09F)

DESCRIPTION

The ECM monitors its internal operation. If it detects a malfunction, the electronic throttle motor circuit inside the ECM is shut off to ensure the safety of the vehicle.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P16B09F

Actuator Cut Circuit Stuck Off

ECM main CPU malfunction (1 trip detection logic).

ECM

Comes on

DTC stored

SAE Code:

P16B0

MONITOR DESCRIPTION

When the EFI main relay is operated by the ECM after the engine switch is turned off, if the electronic throttle motor circuit is detected as not being shut off correctly, the ECM will illuminate the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P16B0: ECM/PCM processor performance

Required sensors/components (Main)

ECM

Required sensors/components (Related)

-

Frequency of operation

Once per driving cycle

Duration

-

MIL operation

Immediate

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

None

Both of the following conditions are met

-

Engine switch

On (IG) to off

EFI Main Relay

ON

TYPICAL MALFUNCTION THRESHOLDS

Actuator Cut Circuit check

Fail

CONFIRMATION DRIVING PATTERN

HINT:

  • After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
  • When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine 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 engine switch off and wait for 2 minutes or more. [*1]

    HINT:

    [*1] : Normal judgment procedure.

    The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.

  5. Turn the engine switch on (IG) and turn the Techstream on.
  6. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  7. Input the DTC: P16B09F.
  8. 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.
    • If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.

CAUTION / NOTICE / HINT

NOTICE:

  • Perform the universal trip to clear permanent DTCs.

    Click here

  • Perform registration and/or initialization when parts related to the automatic transaxle are replaced.

    Click here

  • After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Transmission > Clear DTCs

HINT:

Write down the currently output DTCs before clearing them.

(e) Turn the engine switch off.

NEXT

2.

READ OUTPUT DTC (DTC P16B09F)

(a) Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the engine switch on (IG) and wait for 1 minute or more.

(d) Turn the engine switch off and wait for 2 minutes or more.

HINT:

This DTC is detected after the engine switch is turned off.

(e) Connect the Techstream to the DLC3.

(f) Turn the engine switch on (IG).

(g) Turn the Techstream on.

(h) Enter the following menus: Powertrain / Transmission / Trouble Codes.

Powertrain > Transmission > Trouble Codes

(i) Read the DTCs using the Techstream.

Result

Proceed to

DTCs are not output

A

DTC P16B09F is output

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

3.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM REGISTRATION

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