P0C6E – Hybrid Battery Temperature Sensor ‘A’/’B’ Correlation

P0C6E Possible Causes

  • Faulty hybrid battery thermistor
  • Faulty battery intelligent unit
  • Hybrid battery thermistor harness is open or shorted
  • Poor electrical connection in hybrid battery thermistor circuit

What Does It Mean?

How to Fix Code P0C6E

Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C6E Possible Symptoms

Engine light on (or service engine soon warning light)

P0C6E Meaning

The battery temperature sensors are provided at 3 locations of the HV battery. The resistance of the thermistor, built into each battery temperature sensor, varies according to changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the results of this detection, the power management control ECU controls the fan. (The fan starts when the HV battery temperature exceeds a predetermined level.)

P0C6F – Hybrid Battery Temperature Sensor “B”/”C” Correlation

P0C6F Possible Causes

  • Faulty hybrid battery thermistor
  • Faulty battery intelligent unit
  • Hybrid battery thermistor harness is open or shorted
  • Poor electrical connection in hybrid battery thermistor circuit

What Does It Mean?

How to Fix Code P0C6F

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

P0C6F Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0C6F Meaning

Battery temperature sensors are provided at 3 locations in the HV battery. The resistance of the thermistor, built into each battery temperature sensor, varies with changes in HV battery temperature. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the detection results, the power management control ECU controls the radiator fan. (The radiator fan starts when the HV battery temperature exceeds a predetermined level.)

P0C70 – Correlation ‘C’/’D’ of Hybrid Battery Temperature Sensor

P0C70 Possible Causes

  • Faulty hybrid battery thermistor
  • Faulty battery intelligence unit
  • Hybrid battery thermistor harness is open or shorted
  • Poor electrical connection in hybrid battery thermistor circuit

What Does It Mean?

How to Fix Code P0C70

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C70 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0C70 Meaning

Battery temperature sensors are provided at 3 HV battery locations. The thermistor resistance, built into each battery temperature sensor, varies according to HV battery temperature changes. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligence unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on the detection results, the power management control ECU controls the fan. (The fan starts when the HV battery temperature exceeds a predetermined level.)

P0C71 – Hybrid Battery Temperature Sensor Correlation “D”/”E

P0C71 Possible Causes

  • Faulty hybrid battery thermistor
  • Faulty battery intelligent unit
  • Hybrid battery thermistor harness is open or shorted
  • Poor electrical connection in hybrid battery thermistor circuit

What Does It Mean?

How to Fix Code P0C71

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, ejected, or corroded connector pins.

P0C71 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0C71 Meaning

The battery temperature sensors are provided at 3 HV battery locations. The thermistor resistance, built into each battery temperature sensor, varies according to HV battery temperature changes. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligent unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on this detection result, the power management control ECU controls the radiator fan. (The radiator fan starts when the HV battery temperature exceeds a predetermined level.)

P0C72 – Correlation of Hybrid Battery Temperature Sensor “E”/”F

P0C72 Possible Causes

  • Faulty hybrid battery thermistor
  • Faulty battery intelligence unit
  • Hybrid battery thermistor harness is open or shorted
  • Poor electrical connection in hybrid battery thermistor circuit

What Does It Mean?

How to Fix P0C72 Code

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C72 Possible Symptoms

Check engine light illuminated (or service engine soon warning light)

P0C72 Meaning

Battery temperature sensors are provided at 3 HV battery locations. The thermistor resistance, built into each battery temperature sensor, varies according to HV battery temperature changes. The lower the battery temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance. The battery intelligence unit uses the battery temperature sensors to detect HV battery temperature and sends the detected value to the power management control ECU. Based on this detection result, the power management control ECU controls the radiator fan. (The radiator fan starts when the HV battery temperature exceeds a predetermined level.)

P0C73 – Control Performance of Engine Electronics Coolant Pump ‘A

P0C73 Possible Causes

  • Faulty inverter cooling system
  • Inverter cooling system wiring harness is open or short-circuited
  • Poor electrical connection of the inverter cooling system circuit
  • Inverter water pump assembly
  • Power management control ECU

What Does It Mean?

How to Fix Code P0C73

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C73 Symptoms

Possible

Engine light on (or service engine soon warning light)

P0C73 Meaning

The inverter water pump assembly transmits rotation speed information to the power management control ECU (HV CPU). The power management control ECU (HV CPU) monitors the speed and detects malfunctions.

P0C74 – Electronic Engine Control “B” Cooling Pump Performance

P0C74 Possible Causes

  • Faulty inverter cooling system
  • Inverter cooling system wiring harness is open or short-circuited
  • Poor electrical connection of the inverter cooling system circuit
  • Inverter water pump assembly
  • Power management control ECU

What Does It Mean?

How to Fix Code P0C74

Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C74 Possible Symptoms

Check engine light on (or service engine soon warning light)

P0C74 Meaning

The inverter water pump assembly transmits rotation speed information to the power management control ECU (HV CPU). The power management control ECU (HV CPU) monitors the speed and detects malfunctions.

P0C75 – Hybrid Battery System Discharge Time Too Short

P0C75 Possible Causes

  • Faulty inverter with converter assembly
  • Inverter with converter wiring harness open or short-circuited
  • Inverter with converter assembly circuit poor electrical connection
  • Faulty power management control ECU

What Does It Mean?

How to Fix Code P0C75

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C75 Possible Symptoms

Check Engine Light illuminated (or Service Engine Soon warning light)

P0C75 Meaning

The inverter contains a three-phase bridge circuit, which consists of six power transistors (IGBT) for MG1 and MG2 each. The inverter converts high voltage DC current from the HV battery to three-phase AC current for the generator (MG1) and motor (MG2); it also converts three-phase AC current supplied by the generator (MG1) and motor (MG2) to DC current for the HV battery. The MG ECU controls the operation of the power transistors (IGBT). The inverter transmits necessary control information, such as current and voltage, to the MG ECU.

P0C76 – Hybrid Battery System Discharge Time Too Long

P0C76 Possible Causes

  • Faulty inverter with converter assembly
  • Inverter with converter harness is open or short-circuited
  • Inverter with converter assembly circuit poor electrical connection
  • Faulty power management control ECU

What Does It Mean?

How to Fix Code P0C76

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C76 Possible Symptoms

Check engine light on (or service engine soon warning light)

P0C76 Meaning

The inverter contains a three-phase bridge circuit, which consists of six power transistors (IGBT) for MG1 and MG2 each. The inverter converts high voltage DC current from the HV battery to three-phase AC current for the generator (MG1) and motor (MG2); it also converts three-phase AC current supplied by the generator (MG1) and motor (MG2) to DC current for the HV battery. The MG ECU controls the operation of the power transistors (IGBT). The inverter transmits necessary control information, such as current and voltage, to the MG ECU.

P0C77 – Hybrid Battery System Precharge Time Too Short

P0C77 Possible Causes

  • Faulty inverter with converter assembly
  • Inverter with converter harness is open or short-circuited
  • Inverter with converter assembly circuit poor electrical connection
  • Faulty power management control ECU

What Does It Mean?

How to Fix Code P0C77

Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P0C77 Possible Symptoms

Check engine light on (or service engine soon warning light)

P0C77 Meaning

The inverter contains a three-phase bridge circuit, which consists of six power transistors (IGBT) for MG1 and MG2 each. The inverter converts high voltage DC current from the HV battery to three-phase AC current for the generator (MG1) and motor (MG2); it also converts three-phase AC current supplied by the generator (MG1) and motor (MG2) to DC current for the HV battery. The MG ECU controls the operation of the power transistors (IGBT). The inverter transmits necessary control information, such as current and voltage, to the MG ECU…