Lexus NX: Hybrid system features

Your vehicle is a hybrid vehicle. It has characteristics different from conventional vehicles. Be sure you are closely familiar with the characteristics of your vehicle, and operate it with care.

The hybrid system combines the use of a gasoline engine and an electric motor (traction motor) according to driving conditions, improving fuel efficiency and reducing exhaust emissions.

System components

Lexus NX. Hybrid system

The illustration is an example for explanation and may differ from the actual item.

  1. Gasoline engine
  2. Front electric motor (traction motor)
  3. Rear electric motor (traction motor)

■ When stopped/during start off The gasoline engine stops* when the vehicle is stopped. During start off, the electric motor (traction motor) drives the vehicle. At slow speeds or when traveling down a gentle slope, the engine is stopped* and the electric motor (traction motor) is used.

When the shift lever is in N, the hybrid battery (traction battery) is not being charged. When the vehicle is stopped, always put the shift lever to P.

Also, even in heavy traffic conditions, drive the vehicle in D or S.

*: When the hybrid battery (traction battery) requires charging or the engine is warming up, etc., the gasoline engine will not automatically stop.

■ During normal driving The gasoline engine is predominantly used. The electric motor (traction motor) charges the hybrid battery (traction battery) as necessary.

■ When accelerating sharply When the accelerator pedal is depressed heavily, the power of the hybrid battery (traction battery) is added to that of the gasoline engine via the electric motor (traction motor).

■ When braking (regenerative braking) The wheels operate the electric motor (traction motor) as a power generator, and the hybrid battery (traction battery) is charged.

■Regenerative braking In the following situations, kinetic energy is converted to electric energy and deceleration force can be obtained in conjunction with the recharging of the hybrid battery (traction battery).

■EV indicator The EV indicator comes on when the vehicle is driven using only the electric motor (traction motor) or the gasoline engine is stopped.

Lexus NX. Hybrid system

■Conditions in which the gasoline engine may not stop The gasoline engine starts and stops automatically.

However, it may not stop automatically in the following conditions*:

*: Depending on the circumstances, the gasoline engine may also not stop automatically in other situations.

■Charging the hybrid battery (traction battery) As the gasoline engine charges the hybrid battery (traction battery), the battery does not need to be charged from an outside source. However, if the vehicle is left parked for a long time the hybrid battery (traction battery) will slowly discharge. For this reason, be sure to drive the vehicle at least once every few months for at least 30 minutes or 10 miles (16 km). If the hybrid battery (traction battery) becomes fully discharged and you are unable to start the hybrid system, contact your Lexus dealer.

■After the 12-volt battery has discharged or when the terminal has been removed and installed during exchange, etc.

The gasoline engine may not stop even if the vehicle is being driven by the hybrid battery (traction battery). If this continues for a few days, contact your Lexus dealer.

■Sounds and vibrations specific to a hybrid vehicle There may be no engine sound or vibration even though the vehicle is able to move with the "READY" indicator is illuminated. For safety, make sure to shift the shift lever to P and apply the parking brake when parked.

The following sounds or vibrations may occur when the hybrid system is operating and are not a malfunction:

■Maintenance, repair, recycling, and disposal Contact your Lexus dealer regarding maintenance, repair, recycling and disposal. Do not dispose of the vehicle yourself.

■Customization Settings (e.g. on/off operation of the EV indicator) can be changed.

Vehicle proximity notification system

When driving with the gasoline engine stopped, a sound, which changes in accordance with the driving speed, will be played in order to warn people nearby of the vehicle's approach. The sound will stop when the vehicle speed exceeds approximately 15 mph (25 km/h).

■Vehicle proximity notification system In the following cases, the vehicle proximity notification system may be difficult for surrounding people to hear.

Also, as the vehicle proximity notification system is installed on the front of the vehicle, it may be more difficult to hear from the rear of the vehicle compared to the front.


 Hybrid system precautions

Take care when handling the hybrid system, as it is a high voltage system (about 650 V at maximum) as well as contains parts that become extremely hot when the hybrid system is operating. Obey the

 Theft deterrent system

Immobilizer system The vehicle's keys have built-in transponder chips that prevent the hybrid system from starting if a key has not been previously registered in the vehicle's on-board computer

 Vehicle status information and indicators


 Operation Check

OPERATION CHECK INSPECT INDICATOR/WARNING LIGHT (a) Check the following indicators and warning lights. Indicator/Warning Light Switch Condition Specified Condition *1: w/ Pre-collision System *2: w/ Automatic High Beam System Brake warning light Power switch off → on (IG) Comes

 Drive Motor "A" Position Sensor Angle Malfunction (P1CAD-168,P1CB0-795,P1CB3-796)

DESCRIPTION The MG ECU, which is built into the inverter with converter assembly, monitors its internal operation and detects malfunctions. HINT: The term "drive motor A" indicates the motor (MG2). DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate P1CA

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