Coolant temperature gauge
If the pointer arrow is constantly against the mark "0", then with the ignition on, disconnect the wire from the pointer sensor and connect the tip of the wire to ground. If the arrow deviates, then the sensor is faulty and must be replaced. If the arrow does not deviate, then remove the combination from the instrument panel, remove the right (red) block and with the ignition on, connect the plug of the instrument cluster to ground, to which the green wire from the sensor is connected. The deviation of the arrow in this case will indicate the serviceability of the device and the damage to the wire connecting the indicator sensor to the instrument cluster. If the arrow does not deviate, then replace the device or the entire instrument cluster.
If the pointer needle is constantly in the red zone, then with the ignition on, disconnect the wire from the sensor. If the sensor is faulty, the arrow should return to the mark "0". If the arrow remains in the red zone, then either the wire has a short to ground, or the device is damaged. The function of the device can be checked by disconnecting the right (red) instrument cluster box. With the ignition on, the arrow should be at the mark "0".
Fuel gauge
The verification procedure is similar to that described above. In this case, it must be borne in mind that the plug "W" the pointer sensor is connected to the wire that goes to the fuel reserve control lamp, and to the plug "T" - a wire going to the pointer itself.
If the pointer needle is constantly at the beginning of the scale and does not deviate after shorting with the mass of the tip of the wire disconnected from the plug "T" sensor, it is necessary to check the device. To do this, remove the instrument cluster, disconnect the right (red) the block and, with the ignition on, connect the instrument cluster plug to ground, to which the pink wire fits. With a working device, the arrow should deviate.