M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: P062049; Generator Control Circuit Internal Electronic Failure; 2023 MY Corolla Corolla Hatchback [09/2022 - 03/2023]

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM1000000026CGG
Model Year Start: 2023	Model: Corolla Hatchback	Prod Date Range: [09/2022 - 03/2023]
Title: M20A-FKS (BATTERY / CHARGING): CHARGING SYSTEM: P062049; Generator Control Circuit Internal Electronic Failure; 2023 MY Corolla Corolla Hatchback [09/2022 - 03/2023]

DTC

P062049

Generator Control Circuit Internal Electronic Failure

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	Warning Indicate	Memory	Note
P062049	Generator Control Circuit Internal Electronic Failure	All of the following conditions are met (1 trip detection logic): Ignition switch ON. Except during engine cranking. Auxiliary 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	Charge warning is displayed	DTC stored	SAE Code: P0620 DTC for Mexico Models: Does not apply

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.	CHARGING CIRCUIT WITHOUT LOAD

Click here

NG

REPAIR OR REPLACE GENERATOR ASSEMBLY

for Denso Made Generator: Click here

for VALEO Made: Click here

OK

2.	CHARGING CIRCUIT WITH LOAD

Click here

OK

CHECK FOR INTERMITTENT PROBLEMS

NG

REPAIR OR REPLACE GENERATOR ASSEMBLY

for Denso Made Generator: Click here

for VALEO Made: Click here