High-voltage batteries charge or discharge, in order to keep the heat in a controlled range, high-voltage batteries have their own set of air cooling system. And when Benz key OBD2 the temperature is higher than 550C, the output power of the high voltage battery will be limited. The core element of the cooling system is the electric fan, which OBD2 utilizes the air-cooled high-voltage battery in the vehicle and is powered by a 12V vehicle voltage (Figure 16). In the maintenance manual is called battery fan 1 V457.
Jetta hybrid models have high voltage connections, which are bolted to high voltage batteries, power electronics and electric drive motors. The connector has a double disconnect system, the control line is disconnected and the high voltage contact is Benz disconnected. While the high-voltage cable has a double insulation and unipolar structure characteristics. In the event of a slight collision and no airbag is triggered, if the cable is damaged and the control line is broken, the high voltage system is switched off (Figure 17).
The drive motor temperature sensor G712 is mounted between the two solenoid valves to provide more signal detection. It is an NTC sensor, responsible for sending the temperature to the power electronics device, with the signal to prevent the electric VAG drive motor overheating. If the cooling output in the high temperature circuit is insufficient, the electric drive motor will be limited by the power electronics and can no longer be activated at temperatures above 180 ° C.
If the sensor fails, the hybrid system indicator lights up in the instrument cluster, the vehicle can still drive, but the hybrid mode is severely limited.
The drive motor rotor position sensor 1 G713 is mounted in the clutch housing of the gearbox, which is responsible for determining the current position of the rotor K518ISE relative to the stator (Figure 19). The sensor determines the rotor position and determines the engine speed, direction of rotation and phase shift.
The sensor is a kind of sensor with enhanced electronic evaluation device, it has two kinds of signal output (sine and cosine) and two kinds of power supply lines (positive and ground lines). The power electronics are powered by a 5V DC K518 voltage and are converted to a high frequency DC voltage inside the device, supplying power for four integrated coils (two sine coils and two cosine coils).
If the sensor fails, the hybrid system indicator will light up in the instrument cluster, the vehicle can still drive at any time, but the electric drive motor is no longer enabled: http://www.lonsdork518.com/
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