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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 94 (Motor Generator Control System (2WD) - Diagnostic Codes (3 Of 4)) >> MOTOR GENERATOR CONTROL SYSTEM (for 2WD) >> DTC P1BFB-9E: Battery Discharge Control Circuit Stuck On [12/2019 - 11/2023] >> Description

DTC P1BFB-9E: Battery Discharge Control Circuit Stuck On [12/2019 - 11/2023]: Description

WARNING: This page is about a different variant/trim than selected.

The motor generator ECU located in the inverter with converter assembly receives power from the IGCT power source line and discharge control power source line. A semiconductor switch is installed in the motor generator ECU to switch which is used to switch the discharge control power source line power source on and off.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P1BFB-9E Battery Discharge Control Circuit Stuck On When the motor generator ECU is started, the discharge control BAT switch command flag is OFF for a certain period of time, but the discharge control BAT voltage is at or above the threshold at that time.
(1 trip detection logic)
Inverter with converter assembly Does not Come on Master Warning:
Comes on