Lexus NX: Internal Control Module Monitoring Processor Performance (P060A)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Internal Control Module Monitoring Processor Performance (P060A)

MONITOR DESCRIPTION

The main CPU and sub CPU of the ECM perform data communication between each other. The main CPU monitors the communication and WDC pulses from the sub CPU. When the signal malfunctions below are detected, this DTC is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P060A	Internal Control Module Monitoring Processor Performance	A CPU reset is performed after one of the following conditions is met (1 trip detection logic): There is an ECM main CPU error. There is an ECM sub CPU error. There is an electronic throttle monitoring CPU error.	ECM	Comes on	DTC stored

MONITOR STRATEGY

Related DTCs	P060A: Internal control module monitoring processor performance
Required Sensors/Components (Main)	ECM
Required Sensors/Components (Related)	-
Frequency of Operation	Continuous
Duration	-
MIL Operation	Immediate
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

TYPICAL MALFUNCTION THRESHOLDS

Either of the following conditions is met	1 or 2
1. All of the following conditions are met	-
CPU reset	1 time or more
Throttle position - Learned throttle closed position	2.6 V or higher
Command to electronic throttle actuator	Off
2. CPU reset	2 times or more

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.
Wait 16 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: P060A.

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:

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 P060A)

(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 Techstream off.

(f) Turn the power switch off.

(g) Disconnect the Techstream.

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

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

(j) Connect the Techstream to the DLC3.

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

(l) Turn the Techstream on.

(m) Wait for 16 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 P060A is output	B

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

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Lexus NX: Internal Control Module Monitoring Processor Performance (P060A)

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When Disconnecting Or Reconnecting Battery Terminal

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