DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 84 (Motor Generator Control System (2WD) - Diagnostic Codes (1 Of 4)) >> MOTOR GENERATOR CONTROL SYSTEM (for 2WD) >> DTC P0A1B-1F: Generator Control Module Circuit Intermittent [12/2019 - 11/2023] >> Description

DTC P0A1B-1F: Generator Control Module Circuit Intermittent [12/2019 - 11/2023]: Description

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

If the motor generator control ECU, which is built into the inverter with converter assembly, is reset due to a problem with the power source in the inverter, the motor generator control ECU will store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A1B-1F Generator Control Module Circuit Intermittent Error in reset signal from the inverter assembly power source IC:
If internal power source voltage drops below the normal CPU operating voltage or the ROM/RAM is malfunctioning, the power source IC resets the MG ECU and stores this DTC.
(1 trip detection logic)
  • Wire harness or connector
  • Inverter with converter assembly
  • Auxiliary battery terminal
Comes on Master Warning:
Comes on