Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Internal Control Module EEPROM Data Memory Failure (P062F44)

Toyota Corolla Cross (2022-2024) Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / Internal Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION

The engine stop and start ECU monitors its internal operation and stores this DTC when it detects an internal malfunction.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P062F44

Internal Control Module EEPROM Data Memory Failure

An engine stop and start ECU internal error (EEPROM) (1 trip detection logic).

Engine stop and start ECU

Comes on

Does not come on

SAE Code: P062F

MONITOR DESCRIPTION

The engine stop and start ECU monitors its internal operation. If the internal operation is malfunctioning, the engine stop and start ECU illuminates the MIL and store this DTC.

MONITOR STRATEGY

Related DTCs

P062F: Internal control module EEPROM (starter / generator control module) functional

Required Sensors/Components (Main)

Engine stop and start ECU

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

The 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

The 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 (a) or (b) is met

-

(a) The following condition is met

2 data or more

EEPROM access error (more than 3 times)

Occurred

(b) Permanent Fault Code data (more than 10 times)

Mismatch

CONFIRMATION DRIVING PATTERN

STOP AND START SYSTEM OPERATION CHECK

HINT:

  • If the cable is disconnected from the auxiliary battery terminal, stop and start control is prohibited until refresh charge is completed.

    In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item "Status of Battery Charge Control" changes from "Refresh Charge Mode". (Usually, by idling the engine for 5 to 60 minutes with the auxiliary battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

  • If the GTS is not available and the Data List item "Status of Battery Charge Control" cannot be checked, charge the auxiliary battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

    If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

  • After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.
  • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.
  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

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

(a) Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

Powertrain > Stop and Start > Clear DTCs

(b) Turn the GTS off.

(c) Turn the ignition switch off.

(d) Disconnect the GTS.

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

(f) Connect the cable to the negative (-) auxiliary battery terminal.

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

(h) Enter the following menus: Powertrain / Stop and Start / Trouble Codes.

Powertrain > Stop and Start > Trouble Codes

(i) 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.

STOP AND START SYSTEM OPERATION CHECK

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs

(b) Turn the ignition switch off.

NEXT

2.

READ OUTPUT DTC (DTC P062F44)

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

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

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

(d) Read the DTCs.

Powertrain > Stop and Start > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P062F44 is output

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE ENGINE STOP AND START ECU

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