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

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

REPAIR OR REPLACE GENERATOR ASSEMBLY

2.	INSPECT CHARGING CIRCUIT WITH LOAD

Click here

CHECK FOR INTERMITTENT PROBLEMS

REPAIR OR REPLACE GENERATOR ASSEMBLY

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Before Starting Driving Adjustment

BEFORE STARTING DRIVING ADJUSTMENT CAUTION / NOTICE / HINT HINT: Purpose of millimeter wave radar beam axis learning If the installation position or orientation of the millimeter wave radar sensor is changed due to it being removed and reinstalled or replaced with a new one

Parts Location

PARTS LOCATION ILLUSTRATION *1 HEADLIGHT UNIT ASSEMBLY LH *2 HEADLIGHT UNIT ASSEMBLY RH *3 SIDE TURN SIGNAL LIGHT ASSEMBLY LH *4 SIDE TURN SIGNAL LIGHT ASSEMBLY RH *5 MILLIMETER WAVE RADAR SENSOR ASSEMBLY *6 FORWARD RECOGNITION CAMERA *7 OUTER

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

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Before Starting Driving Adjustment

Parts Location