Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Internal Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

SAE

P062F44

ECM internal error (EEPROM)

ECM

P062F

MONITOR DESCRIPTION

The ECM monitors its internal operation. If the internal operation is malfunctioning, the ECM will turn on the MIL and store the 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

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All:

The monitor will run 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 areas or more

Any of the following conditions (a), (b) or (c) are met

More then 3 times

(a) EEPROM communication timeout

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 areas or more

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

More then 3 times

(a) EEPROM communication timeout

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 areas or more

(a) EEPROM communication timeout occurred

More than 3 times

2. Permanent Fault Code data mismatch

More than 10 times

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 (See page ).
  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 procedure).
  4. Turn the ignition switch off and wait for 2 minutes or more.
  5. Turn the ignition switch to ON and turn the Techstream on.
  6. Wait for 11 seconds or more with the ignition switch to ON. [*1]

    HINT:

    [*1] : Normal judgment procedure.

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

  7. Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
  8. Input the DTC: P062F44.
  9. 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 (See page Perform registration and/or initialization when parts related to the ).
  • Perform registration and/or initialization when parts related to the automatic transmission are replaced (See page After turning ignition switch off, waiting time may be required before ).
  • After turning ignition 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 (See page ).

PROCEDURE

1.

READ OUTPUT DTC (DTC P062F44)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Clear DTCs (See page (e) Turn the ignition switch off and turn the Techstream off. ).

(e) Turn the ignition 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 ignition switch to ON.

(k) Turn the Techstream on.

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

(m) Read DTCs.

Result

Result

Proceed to

No DTC output

A

P062F44 is output

B

A

CHECK FOR INTERMITTENT PROBLEMS

B

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