Lexus NX: Internal Control Module EEPROM Error (P062F)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Internal Control Module EEPROM Error (P062F)

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
P062F	Internal Control Module EEPROM Error	An ECM internal error (EEPROM) (1 trip detection logic).	ECM	Comes on	DTC stored

MONITOR DESCRIPTION

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

MONITOR STRATEGY

Related DTCs	P062F: Internal control module EEPROM functional
Required Sensors/Components (Main)	ECM
Required Sensors/Components (Related)	-
Frequency of Operation	Once per driving cycle
Duration	3 times
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored	None
All of the following conditions are met	-
Time after engine start	10 seconds or more
Auxiliary battery voltage	8 V or higher
Power switch	On (IG)

TYPICAL MALFUNCTION THRESHOLDS

Either condition is met	1 or 2
1. Permanent fault code data	Mismatch (3 times or more)
2. EEPROM communication	Timeout

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the Techstream off.
Turn the power switch off.
Disconnect the Techstream.
Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
Connect the cable to the negative (-) auxiliary battery terminal.
Connect the Techstream to the DLC3.
Turn the power switch on (IG) and turn the Techstream on.
Put the engine in inspection mode (maintenance mode).
Click here
Start the engine and wait 30 seconds or more.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
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.
Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
Input the DTC: P062F.

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 is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs.
Click here
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

CAUTION / NOTICE / HINT

NOTICE:

There is a possibility that the DTC P062F is issued from the ECUs of the ECM and hybrid vehicle control ECU.
Use Techstream to conduct a health check to confirm which ECU the DTC is issued from and then inspect the related system.
After the power switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery.
Click here

HINT:

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

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 P062F)

(a) Connect the Techstream to the DLC3.

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

(d) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

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

(f) Disconnect the Techstream.

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

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

(i) Connect the Techstream to the DLC3.

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

(k) Turn the Techstream on.

(l) Put the engine in inspection mode (maintenance mode).

Click here

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

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

(n) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

(o) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTC P062F is output	B

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

SEE MORE:

Inspection

INSPECTION PROCEDURE 1. INSPECT CYLINDER HEAD SUB-ASSEMBLY (a) Using a precision straightedge and feeler gauge, measure the warpage of the contact surfaces where the cylinder head contacts the cylinder block and manifold. *a Cylinder Head Lower Side *b Intake Manifold Side *c Exhaust

Installation

INSTALLATION PROCEDURE 1. INSTALL MAP LIGHT ASSEMBLY (PERSONAL LIGHT) (a) Connect the connectors. (b) Attach the 4 clips to install the map light assembly (personal light).

Lexus NX: Internal Control Module EEPROM Error (P062F)

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