Lexus NX manuals

Lexus NX: Control Module Performance (P0607)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (engine Control) / Sfi System / Control Module Performance (P0607)

MONITOR DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0607

Control Module Performance

Either condition is met (1 trip detection logic):

  • ECM CPUs malfunction
  • Heated oxygen sensor transistor (built into ECM) malfunction
  • ECM
  • Heated oxygen sensor (sensor 2)
  • Exhaust gas leak

Comes on

DTC stored

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

Both of the following conditions are met

-

Engine

Running

Estimated heated oxygen sensor temperature

450°C (842°F) or higher, and less than 750°C (1382°F)

TYPICAL MALFUNCTION THRESHOLDS

Heated oxygen sensor transistors

Fail

CONFIRMATION DRIVING PATTERN

  1. Stop the engine for 30 minutes or more [A].
  2. Connect the Techstream to the DLC3.
  3. Turn the power switch on (IG) and turn the Techstream on [B].
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off and wait for at least 30 seconds.
  6. Turn the power switch on (IG) and turn the Techstream on [C].
  7. Put the engine in inspection mode (maintenance mode).

    Click here

  8. Start the engine and wait 2 minutes [D].
  9. Warm up the engine until the engine coolant temperature is 73°C (163°F) or higher [E].
  10. Idle the engine for 1 minute [F].
  11. With the engine running, accelerate the vehicle to 80 km/h (50 mph) and stop the vehicle [G].

    CAUTION:

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

    HINT:

    If the engine stops, further depress the accelerator pedal to restart the engine.

  12. With the engine running, drive the vehicle at 56 to 80 km/h (35 to 50 mph) for 5 minutes or more [H].

    CAUTION:

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

    HINT:

    If the engine stops, further depress the accelerator pedal to restart the engine.

  13. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [I].
  14. 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.
  15. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  16. Input the DTC: P0607, P0136, P0137 or P0138.
  17. 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 steps [E] through [I] again.
  18. If 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

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 FOR ANY OTHER DTCS OUTPUT

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

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

(e) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTC P0607 and P0136, P0137 or P0138 are output

A

DTC P0607 is output

B
B

GO TO STEP 3

A

2.

INSPECT DTC (P0136, P0137 OR P0138)

(a) Refer to the P0136, P0137 or P0138 flowchart.

HINT:

  • If P0136 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If P0137 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If P0138 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If DTC P0607 and P0136, P0137 or P0138 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 6

3.

CHECK FOR EXHAUST GAS LEAK

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG) and turn the Techstream on.

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

Click here

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(d) Start the engine.

(e) Allow the engine to idle and then rev the engine.

(f) 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.

PERFORM CONFIRMATION DRIVING PATTERN

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

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

(f) Turn the power switch on (IG) and turn the Techstream on.

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

Click here

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

(h) Start the engine.

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

(j) Perform the driving pattern.

CAUTION:

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

HINT:

If the engine stops, further depress the accelerator pedal to restart the engine.

(1) With the engine running, accelerate the vehicle until 80 km/h (50 mph) and stop the vehicle.

(2) With the engine running, drive the vehicle between 60 to 80 km/h (37 to 50 mph) for 5 minutes.

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

(l) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTC P0607 and P0136, P0137 or P0138 are output

A

DTC P0607 is output

B

DTCs are not output

C
B

REPLACE ECM

C

GO TO STEP 6

A

5.

INSPECT DTC (P0136, P0137 OR P0138)

(a) Refer to the P0136, P0137 or P0138 flowchart.

HINT:

  • If P0136 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If P0137 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If P0138 is output, troubleshoot for that DTC first (Click here ). Then proceed to "Inspect ECM".
  • If DTC P0607 and P0136, P0137 or P0138 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

6.

INSPECT ECM

(a) Clear the DTCs.

Click here

Powertrain > Engine and ECT > Clear DTCs

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

(c) Turn the power switch on (IG) and turn the Techstream on.

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

Click here

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode

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

(f) Turn the Techstream on.

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

(h) Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

DTCs are not output

A

DTC P0607 is output

B
A

END
B

REPLACE ECM

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