Lexus NX manuals

Lexus NX: Generator Control Module (P0A1A-151,P0A1C-709)

Lexus NX Service Manual / Engine & Hybrid System / 2ar-fxe (hybrid / Battery Control) / Hybrid Control System / Generator Control Module (P0A1A-151,P0A1C-709)

DESCRIPTION

The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and will store DTCs if the system is malfunctioning. If any of the following DTCs are output, replace the inverter with converter assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

P0A1A-151

Generator Control Module

MG ECU internal malfunction:

Run pulse signal cycle deviation or stop

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on

P0A1C-709

Drive Motor "B" Control Module

MG ECU internal malfunction:

R/D converter communication error

(1 trip detection logic)

Inverter with converter assembly

Comes on

Master Warning Light:

Comes on
Related Data List

DTC No.

Data List

P0A1A-151

P0A1C-709

-

MONITOR DESCRIPTION

The MG ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these tests, the MG ECU checks the result of the generator CPU self-test. If the MG ECU detects a "Fail" from the generator CPU self-test, it will conclude that there is an internal malfunction in the generator CPU and the hybrid vehicle control ECU will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0A1A (INF 151): RUN pulse malfunction

P0A1C (INF 709): RUN pulse malfunction

Required sensors/components

Inverter with converter assembly (MG ECU)

Frequency of operation

Continuous

Duration

TMC's intellectual property

MIL operation

1 driving cycle

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not stored

TMC's intellectual property

Other conditions belong to TMC's intellectual property

-

TYPICAL MALFUNCTION THRESHOLDS

TMC's intellectual property

-

COMPONENT OPERATING RANGE

Hybrid vehicle control ECU

DTC P0A1A (INF 151) is not detected

DTC P0A1C (INF 709) is not detected

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG) and turn the Techstream on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the power switch off and wait for 30 seconds or more.
  5. Turn the power switch on (READY) and after 1 minute or more, turn the power switch off. [A]
  6. Repeat [A] 3 times. [B]
  7. Turn the power switch on (IG) and turn the Techstream on.
  8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]
  9. Read the current DTCs.

    HINT:

    • If a current DTC is output, the system is malfunctioning.
    • If current DTCs are not output, check for permanent DTCs.
  10. Check that the permanent DTCs are cleared.
  11. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

CAUTION / NOTICE / HINT

HINT:

  • If DTC P0A1A-151, P06B0-163, P06D6-511, P06E6-164, P0A1A-658, P0A1A-791, P0A1B-786, P0A1B-794, P0A1C-709, P0A1C-710, P0A1C-797, P1C2A-155, P1C2B-192, P1C2C-706, P1C73-512, P3133-659 or P3134-661 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. Turn the power switch on (IG) and wait for 5 seconds or more.
  • If DTC P1CA6-156, P1CA7-193 or P1CA8-708 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. Turn the power switch on (IG) and wait for 1 minute or more.
  • If DTC P0A1A-166 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. Turn the power switch on (READY).
    2. With the vehicle stopped and the shift lever in P, depress the accelerator pedal and start the engine.
    3. Depress the accelerator pedal and keep the engine running for 30 seconds or more.
  • If DTC P0A1B-198 or P0A1C-713 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.
    1. Turn the power switch on (READY).
    2. Drive the vehicle at 5 km/h (3 mph) or more for 30 seconds or more.

PROCEDURE

1.

REPLACE INVERTER WITH CONVERTER ASSEMBLY

Click here

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COMPLETED

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