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

Toyota Tacoma (2015-2018) Service Manual / Ac60e Automatic Transmission / Transaxle / Automatic Transmission System(for 2gr-fks) / 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 ).

Connect the Techstream to the DLC3.
Turn the ignition switch to ON and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for 2 minutes or more.
Turn the ignition switch to ON and turn the Techstream on.
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.
Enter the following menus: Powertrain / Transmission / Utility / All Readiness.
Input the DTC: P062F44.

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 automatic transmission are replaced (See page ).
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.

(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

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

Lost Communication with ECM/PCM "A" Missing Message (U010087)

DESCRIPTION The engine control unit and the transmission control unit are located inside the ECM. The engine control unit intercommunicates with the transmission control unit with the Controller ...

Pressure Control Solenoid "G" Actuator Stuck Off (P28077F)

SYSTEM DESCRIPTION The ECM uses the vehicle speed signal and signals from the transmission revolution sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). The ECM com ...

Other materials:

Brake System (P157800)
DESCRIPTION This DTC is output when the VSC system has a problem. Check the VSC system when this DTC is output. DTC No. DTC Detection Condition Trouble Area MIL Note P157800 Diagnosis Condition: Cr ...

Floor mat
Use only floor mats designed specifically for vehicles of the same model and model year as your vehicle. Fix them securely in place onto the carpet. Insert the retaining hooks (clips) into the floor mat eyelets. Turn the upper knob of each retaining hook (clip) to secure the floor mats in ...

Transponder Chip Malfunction (B2793,B2794,B2797,B2798)
DESCRIPTION DTC B2793 is stored when a malfunction is found in the key during key code registration or a key code is not registered normally. Replace the key if key code registration cannot be performed normally and this DTC is output. DTC B2794 is stored when a key with an i ...