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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 113 (Hybrid Control System (2WD) - Diagnostic Codes (6 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [12/2019 - 11/2023] >> Description

DTC P321E-9F: Motor/Generator Shutdown Signal Stuck Off [12/2019 - 11/2023]: Description

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

The hybrid vehicle control ECU sends a block signal to the motor generator control ECU (MG ECU) to shut down the power supply to the motor. When the system is not in the on (READY) state, it sends an HSDN (MG shutdown signal) signal from the hybrid vehicle control ECU to the motor generator control ECU (MG ECU) to check the function of the HV gate block. When a malfunction is detected in the HV gate block function, DTCs are stored.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P321E-9F Motor/Generator Shutdown Signal Stuck Off When the HV gate block function check is performed (when the ignition switch is turned from ON (READY) to off), the inverter voltage (VH) drops and current flows in the inverter.
(1 trip detection logic)
  • Wire harness or connector
  • Hybrid vehicle control ECU
  • Inverter with converter assembly
Does not come on Master Warning:
Comes on
RELATED DATA LIST

DTC No. Data List
P321E-9F
  • VH-Voltage after Boosting
  • Ready Signal
  • Inverter Emergency Shutdown (Main CPU)
  • Inverter Emergency Shutdown (Sub CPU)