Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Generator Control Circuit Internal Electronic Failure (P062049)

Toyota Corolla Cross (2022-2025) Service Manual / Power Source & Network / M20a-fks (battery / Charging) / Charging System / Generator Control Circuit Internal Electronic Failure (P062049)

DESCRIPTION

The alternator performs self-diagnosis of its internal circuits to detect malfunctions (open or short circuits).

The ECM receives the result via LIN communication and stores a DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Warning Indicate

Note

P062049

Generator Control Circuit Internal Electronic Failure

(1 trip detection logic)

All of the following conditions are met (1 trip detection logic):

  • Ignition switch ON.
  • Except during engine cranking.
  • Battery voltage is 10.5 V or higher.
  • No malfunction in the LIN communication system.
  • Open or short in EXC circuit, or abnormal waveform for PH circuit.

Generator assembly

Does not come on

Charge warning light:

Comes on

SAE Code: P0620

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE

1.

INSPECT CHARGING CIRCUIT WITHOUT LOAD

Click here

NG

REPAIR OR REPLACE GENERATOR ASSEMBLY

OK

2.

INSPECT CHARGING CIRCUIT WITH LOAD

Click here

OK

CHECK FOR INTERMITTENT PROBLEMS

NG

REPAIR OR REPLACE GENERATOR ASSEMBLY

    READ NEXT:

     Generator "A" Mechanical Performance Mechanical Failure (P065C07)

    DESCRIPTION The alternator performs self-diagnosis of its internal circuits to detect malfunctions (open or short circuits). The ECM receives the result via LIN communication and stores a DTC.

     Deterioration of Battery Low Capacity (P160200)

    DESCRIPTION The ECM determines the battery status according to the voltage of the BATT terminal while the engine is running (not cranking). DTC No. Detection Item

     Lost Communication with Alternator Missing Message (P161A87)

    DESCRIPTION The ECM communicates with the generator assembly via LIN communication. If a LIN communication error is detected, the ECM stores this DTC. DTC No. Detection Item

    SEE MORE:

     ECM Power Source Circuit

    DESCRIPTION When the ignition switch is turned to ON, the auxiliary battery voltage is applied to IGP of the ECM. When the transistor in the MREL circuit operates, current flows from the auxiliary battery to ground through the drive circuit of the EFI-MAIN NO. 1 relay, thus operating the relay which

     Customization

    Customizable features Your vehicle includes a variety of electronic features that can be personalized to suit your preferences. The settings of these features can be changed using the multi-information display, the audio system screen, or at your Toyota dealer. Customizing vehicle features ■ Chang

    © 2020-2025 Copyright www.tcorollacross.com PT NL