Coolant temperature gauge
If the pointer needle is constantly at the beginning of the scale, then with the ignition on, disconnect the wire from the pointer sensor and connect the wire tip to the housing. 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 red block and, with the ignition on, connect the plug of the red block of the instrument cluster to the housing. 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. With a faulty sensor, the arrow should return to the beginning of the scale. If the arrow remains in the red zone, then either the wire has a short circuit with the case, or the device is damaged. The serviceability of the device can be checked by disconnecting the red block from the instrument cluster. With the ignition on, the arrow should be at the beginning of the scale.
Fuel gauge
The verification procedure is similar to that described above. If the pointer needle is constantly at the beginning of the scale and does not deviate after the tip of the pink wire disconnected from the sensor is shorted to the body, then it is necessary to check the device. To do this, remove the instrument cluster, disconnect the red block of wires from it and, with the ignition on, connect the plug of the red block of the instrument cluster to the housing. For a serviceable device, the arrow should deviate.
If the pointer needle is constantly at the end of the scale, then the device can be checked by disconnecting the red block of wires from the instrument cluster. In this case, for a serviceable device with the ignition on, the arrow should return to the beginning of the scale.