Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Internal Control Module EEPROM Data Memory Failure (P062F44)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Engine & Hybrid System / 2gr-fks (engine Control) / Sfi System / Internal Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION

The ECM monitors its internal operation and stores this DTC when it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P062F44

Internal Control Module EEPROM Data Memory Failure

An ECM internal error (EEPROM) (1 trip detection logic).

ECM

Comes on

DTC stored

SAE Code: P062F

MONITOR DESCRIPTION

The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM illuminates the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P062F: Internal control module EEPROM error functional

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous: Case 1, Case 2

Once per driving cycle: Case 3

Duration

-

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None
Case 1

All of the following conditions are met

-

Permanent Fault Code

Not stored

OBDII system commands

Store

Battery voltage

8 V or higher
Case 2

All of the following conditions are met

-

Permanent Fault Code

Stored

OBDII system commands

Clear

Battery voltage

8 V or higher
Case 3

Battery voltage

8 V or higher

TYPICAL MALFUNCTION THRESHOLDS

Case 1

Following condition is met

2 data or more

One of the following conditions (a), (b) or (c) is met

More than 3 times

(a) EEPROM access error

Occurred

(b) Permanent Fault Code

Not stored

(c) Permanent Fault Code

Not equal to commanded Fault Code
Case 2

Following condition is met

2 data or more

Either of the following conditions (a) or (b) is met

More than 3 times

(a) EEPROM access error

Occurred

(b) Permanent Fault Code

Stored
Case 3

Either of the following conditions is met

1 or 2

1. Following condition is met

2 data or more

EEPROM access error (more than 3 times)

Occurred

2. Permanent Fault Code data (more than 10 times)

Mismatch

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • 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).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the Techstream off.
  6. Turn the engine switch off.
  7. Disconnect the Techstream.
  8. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
  9. Connect the cable to the negative (-) battery terminal.
  10. Connect the Techstream to the DLC3.
  11. Start the engine and wait 30 seconds or more [A].
  12. Turn the Techstream on.
  13. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  14. 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.
  15. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  16. Input the DTC: P062F44.
  17. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [B]: Normal judgment procedure.

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

    • When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

NOTICE:

After turning 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

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 P062F44)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the engine switch off and turn the Techstream off.

(f) Disconnect the Techstream.

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

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

(i) Connect the Techstream to the DLC3.

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

(k) Turn the Techstream on.

(l) Start the engine and wait 30 seconds or more.

(m) Enter the following menus: Powertrain / Engine / Trouble Codes.

(n) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P062F44 is output

B
A

CHECK FOR INTERMITTENT PROBLEMS

B

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