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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 107 (Hybrid Control System (2WD) - Diagnostic Codes (4 Of 7)) >> HYBRID CONTROL SYSTEM (for 2WD) >> DTC P0C73-96: Motor Electronics Coolant Pump "A" Component Internal Failure [12/2019 - 11/2023] >> Description

DTC P0C73-96: Motor Electronics Coolant Pump "A" Component Internal Failure [12/2019 - 11/2023]: Description

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

The inverter water pump assembly transmits rotation speed information to the hybrid vehicle control ECU. The hybrid vehicle control ECU monitors the speed and detects malfunctions.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0C73-96 Motor Electronics Coolant Pump "A" Component Internal Failure The inverter water pump assembly revolution speed is abnormally high or low (or stopped) for 1 minute or more.
(1 trip detection logic)
  • Inverter cooling system
  • Wire harness or connector
  • Inverter water pump assembly
  • Hybrid vehicle control ECU
 Comes on Master Warning:
Comes on

HINT: 

The inverter water pump assembly operates when the ignition switch is ON (READY).

RELATED DATA LIST

DTC No. Data List
P0C73-96
  • Inverter Water Pump Revolution
  • Inverter Water Pump Duty Ratio
  • Inverter Coolant Water Temperature
RELATED ACTIVE TEST

DTC No. Active Test
P0C73-96 Activate the Inverter Water Pump
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