HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A02-719, P0A03-720

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

DESCRIPTION

The hybrid vehicle control ECU detects HV coolant temperature using the coolant temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 and MG1, and operates independently of the engine cooling system. The hybrid vehicle control ECU uses signals from the coolant temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the hybrid vehicle control ECU will control HV system output to help prevent overheating. The inverter with converter assembly detects malfunctions in the HV coolant temperature sensor and its wiring.

DTC No. INF Code DTC Detection Condition Trouble Area
P0A02 719 Short to GND in the HV coolant temperature sensor circuit Inverter with converter assembly
P0A03 720 Open or short to +B in the HV coolant temperature sensor circuit

PROCEDURE


  1. REPLACE INVERTER WITH CONVERTER ASSEMBLY


    1. Replace the inverter with converter assembly (See page for LHD, Click here for RHD).

      Tech Tips

      The HV coolant temperature sensor is not available separately. If it requires replacement, replace the inverter with converter assembly.


    NEXT

    COMPLETED