P0A03

DTC P0A02-719 Motor Electronics Coolant Temperature Sensor Circuit Low
DTC P0A03-720 Motor Electronics Coolant Temperature Sensor Circuit High

DESCRIPTION

DTC Detection Condition:

The HV control ECU detects HV coolant temperature through the coolant temperature sensor built into the inverter. The inverter cooling system is the same as that for the Motor or Generator, and operates independently of the engine cooling system. The HV control ECU controls the inverter cooling system to prevent over heating based on signals from the coolant temperature sensor. The ECU also monitors cooling system operation and detects malfunctions in the HV coolant temperature sensor and the circuit.

Step 1:

Step 1(continued):

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT: At least 5 minutes is required to discharge the high-voltage capacitor inside the w/ converter inverter assembly.