Toyota Avalon (XX50): Internal Control Module Random Access Memory (RAM) Error Data Memory Failure (P060444). Control Module Performance Bank 2 Component Internal Failure (P060596,P060796). Control Module Processor System

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / Internal Control Module Random Access Memory (RAM) Error Data Memory Failure (P060444). Control Module Performance Bank 2 Component Internal Failure (P060596,P060796). Control Module Processor System

Internal Control Module Random Access Memory (RAM) Error Data Memory Failure (P060444)

MONITOR DESCRIPTION

The ECM continuously monitors its internal memory status. This self-check ensures that the ECM is functioning properly. The ECM memory status is diagnosed by internal mirroring of the main CPU and sub CPU to detect Random Access Memory (RAM) errors. If outputs from these CPUs are different and deviate from the standard, the ECM will illuminate the MIL and store this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P060444

Internal Control Module Random Access Memory (RAM) Error Data Memory Failure

ECM RAM error (1 trip detection logic).

ECM

Comes on

DTC stored

SAE Code: P0604

MONITOR STRATEGY

Related DTCs

P0604: Internal control module random access memory error (RAM error on electronic throttle control)

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

6 times

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

TYPICAL MALFUNCTION THRESHOLDS

RAM mirror check

Fail

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the Techstream off.
  6. Turn the engine switch off.
  7. Disconnect the Techstream.
  8. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
  9. Connect the cable to the negative (-) battery terminal.
  10. Connect the Techstream to the DLC3.
  11. Turn the engine switch on (IG).
  12. Turn the Techstream on.
  13. Wait 16 seconds or more [A].
  14. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  15. 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.
  16. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  17. Input the DTC: P060444.
  18. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [B]: Normal judgment procedure.

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

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

CAUTION / NOTICE / HINT

NOTICE:

After turning engine 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.

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.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs

(e) Turn the engine switch off.

NEXT

2.

READ OUTPUT DTC (DTC P060444)

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

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

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

(e) Turn the Techstream on.

(f) Wait 16 seconds or more.

(g) Enter the following menus: Powertrain / Engine / Trouble Codes.

(h) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P060444 is output

B
A

CHECK FOR INTERMITTENT PROBLEMS

B

REPLACE ECM

Control Module Performance Bank 2 Component Internal Failure (P060596,P060796)

MONITOR DESCRIPTION

The ECM continuously monitors its internal processors (CPUs) and heated oxygen sensor transistors. This self-check ensures that the ECM is functioning properly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P060596

Control Module Performance Bank 2 Component Internal Failure

Either of the following condition is met (1 trip detection logic):

  • The ECM CPUs malfunction.
  • The heated oxygen sensor transistor (built into the ECM) malfunctions.
  • ECM
  • Heated oxygen sensor (bank 2 sensor 2)
  • Exhaust gas leak

Comes on

DTC stored

SAE Code: P0607

P060796

Control Module Performance Bank 1 Component Internal Failure

Either of the following condition is met (1 trip detection logic):

  • The ECM CPUs malfunction.
  • The heated oxygen sensor transistor (built into the ECM) malfunctions.
  • ECM
  • Heated oxygen sensor (bank 1 sensor 2)
  • Exhaust gas leak

Comes on

DTC stored

SAE Code: P0607

MONITOR STRATEGY

Related DTCs

P0607: Control module performance

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

Heated oxygen sensor

Frequency of Operation

Continuous

Duration

60 seconds

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

Monitor runs whenever the following DTCs are not stored

None

TYPICAL MALFUNCTION THRESHOLDS

Heated oxygen sensor transistors

Fail

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Stop the engine for 30 minutes or more.
  2. Connect the Techstream to the DLC3.
  3. Turn the engine switch on (IG).
  4. Turn the Techstream on.
  5. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  6. Turn the engine switch off and wait for at least 30 seconds.
  7. Turn the engine switch on (IG) [A].
  8. Turn the Techstream on.
  9. Start the engine and wait 2 minutes [B].
  10. Warm up the engine until the engine coolant temperature is 75°C (167°F) or higher [C].
  11. Idle the engine for 1 minute [D].
  12. Accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle [E].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  13. Drive the vehicle at 60 to 80 km/h (37 to 50 mph) for 5 minutes or more [F].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  14. Enter the following menus: Powertrain / Engine / Trouble Codes [G].
  15. 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.
  16. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  17. Input the DTC: P060596, P060796, P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617.
  18. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • If the judgment result is INCOMPLETE, perform steps [B] through [F] again.
    • [A] to [G]: Normal judgment procedure.

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

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

CAUTION / NOTICE / HINT

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.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P060596 OR P060796)

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P060596 or P060796, and P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 are output

A

DTC P060596 or P060796 is output

B
B

GO TO STEP 3

A

2.

INSPECT DTC (DTC P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 OR P015617)

(a) Refer to the P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 flowchart.

HINT:

  • If DTC P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 is output, troubleshoot for that DTC first. Then proceed to "Inspect ECM".

    Click here

  • If DTC P060596 or P060796 and P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or higher).
NEXT

GO TO STEP 8

3.

CHECK FOR EXHAUST GAS LEAK

(a) Allow the engine to idle, and then rev the engine.

(b) Check for exhaust gas leaks around the heated oxygen sensor.

If any exhaust gas leaks are present, repair them and proceed to "Perform Confirmation Driving Pattern". If no exhaust gas leaks are present, proceed to "Perform Confirmation Driving Pattern".

HINT:

  • If no exhaust gas leaks are present, there may be a malfunction in the heated oxygen sensor circuit.
  • If any exhaust gas leaks are present around the heated oxygen sensor, noise appears in the output voltage of the heated oxygen sensor.
  • Perform "Inspection After Repair" after repairing or replacing the exhaust system.

    Click here

NEXT

4.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs

(e) Turn the engine switch off and wait for at least 30 seconds.

NEXT

5.

PERFORM CONFIRMATION DRIVING PATTERN

(a) Start the engine.

(b) Warm up the engine until the engine coolant temperature is 75°C (167°F) or higher.

(c) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

(1) Accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle.

(2) Drive the vehicle between 60 and 80 km/h (37 and 50 mph) for 5 minutes.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTC P060596 or P060796, and P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 are output

A

Only DTC P060596 or P060796 is output

B

DTCs are not output

C
B

REPLACE ECM

C

GO TO STEP 8

A

6.

INSPECT DTC (DTC P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 OR P015617)

(a) Refer to the P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 flowchart.

HINT:

  • If DTC P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 is output, troubleshoot for that DTC first. Then proceed to "Inspect ECM".

    Click here

  • If DTC P060596 or P060796 and P013611, P013613, P013614, P013615, P013617, P015611, P015613, P015614, P015615 or P015617 are output, the output voltage of the heated oxygen sensor may remain close to 0 V or become high (around 1 V or higher).
NEXT

7.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs
NEXT

8.

INSPECT ECM

(a) Stop the engine and wait for 30 minutes.

(b) Start the engine and allow it to idle for 2 minutes.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P060596 or P060796 is output

B
A

END
B

REPLACE ECM

Control Module Processor System Internal Failure (P060604,P060629,P06062A,P060647)

MONITOR DESCRIPTION

The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from these CPUs are different and deviate from the standard, the ECM will illuminate the MIL and store a DTCs.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P060604

Control Module Processor System Internal Failure

ECM main CPU malfunction (1 trip detection logic)

ECM

Comes on

DTC stored

SAE Code: P0606

P060629

Control Module Processor Signal Invalid

ECM main CPU malfunction (1 trip detection logic)

ECM

Comes on

DTC stored

SAE Code: P0606

P06062A

Control Module Processor Signal Stuck in Range

ECM main CPU malfunction (1 trip detection logic)

ECM

Comes on

DTC stored

SAE Code: P0606

P060647

Control Module Processor Watchdog/Safety MCU Failure

ECM main CPU malfunction (1 trip detection logic)

ECM

Comes on

DTC stored

SAE Code: P0606

MONITOR STRATEGY

Related DTC

P0606: ECM/PCM processor performance

Required Sensors/Components (Main)

ECM

Required Sensors/Components (Related)

-

Frequency of Operation

Continuous

Duration

2 times

MIL Operation

Immediate

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None
Case 1, Case 2 and Case 3

Both of the following conditions are met

-

Write Inhibit

Permit

Time after Write status forbiddance to permit

0.5 seconds or more
Case 4 and Case 5

All of the following conditions are met

-

Battery voltage

8 V or higher

Engine switch

On (IG)

Starter

Off

Write Inhibit

Permit

Time after Write status forbiddance to permit

0.5 seconds or more

TYPICAL MALFUNCTION THRESHOLDS

Case 1

One of the following conditions is met

5 seconds or more

ROM check sum

Error

RAM Read/Write check

Fail

Specific software routine operation period check

Fail

Software functional check

Fail
Case 2

Following condition is met

40 times or more

Specific software routine operation period check

Fail
Case 3

One of the following conditions is met

A or B

A. Following condition is met

More than 30 seconds

Specific software operation A validity check

Fail

B. Following condition is met

More than 30 seconds

Specific software operation B validity check

Fail
Case 4

Following condition is met

25 times or more

DMA communication

No response
Case 5

Following condition is met

8 times or more

Watchdog from monitoring processor

Not toggle

CPU reset

Occurred

CONFIRMATION DRIVING PATTERN

HINT:

  • After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.

    Click here

  • When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.

    Click here

  1. Connect the Techstream to the DLC3.
  2. Turn the engine switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the Techstream off.
  6. Turn the engine switch off.
  7. Disconnect the Techstream.
  8. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
  9. Connect the cable to the negative (-) battery terminal.
  10. Connect the Techstream to the DLC3.
  11. Turn the engine switch on (IG).
  12. Turn the Techstream on.
  13. Wait 1 second or more [A].
  14. Enter the following menus: Powertrain / Engine / Trouble Codes [B].
  15. 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.
  16. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  17. Input the DTC: P060604, P060629 or P060647.
  18. 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

    HINT:

    • If the judgment result is NORMAL, the system is normal.
    • If the judgment result is ABNORMAL, the system is malfunctioning.
    • [A] to [B]: Normal judgment procedure.

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

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

CAUTION / NOTICE / HINT

NOTICE:

After turning engine 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.

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.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs

(e) Turn the engine switch off.

NEXT

2.

READ OUTPUT DTC (DTC P060604, P060629 OR P060647)

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

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

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG).

(e) Turn the Techstream on.

(f) Wait 1 second or more.

(g) Enter the following menus: Powertrain / Engine / Trouble Codes.

(h) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P060604, P060629 or P060647 is output

B
A

CHECK FOR INTERMITTENT PROBLEMS

B

REPLACE ECM

System Voltage Circuit Short to Ground or Open (P056014). Thermostat Heater Control Circuit Short to Battery (P059712). Thermostat Heater Control Circuit Short to Ground or Open (P059714)

Starter Relay Circuit Short to Battery (P061512)

See More:

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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