Features of the Niva Chevrolet instrument cluster

All the vehicle's control devices are combined into a cluster

It includes: an electronic speedometer and tachometer, a liquid crystal display of the total and daily mileage counter (odometer), a liquid crystal display of the clock and ambient air temperature, a coolant temperature indicator, a fuel level indicator, twelve control lamps and six backlight lamps.

The operation of the devices is controlled by an electronic module that receives signals from the sensors.

Cluster of instruments:
1 - coolant temperature indicator in the engine cooling system; 2 - an electronic tachometer shows the engine crankshaft speed; 3 - a left turn signal indicator lamp (with a green arrow-shaped filter) lights up with a flashing light when the left turn signal is turned on synchronously with it; 4 - a right turn signal indicator lamp (see; p; 3); 5 - an induction-type speedometer shows the current speed of the vehicle; 6 - an electromagnetic fuel gauge; 7 - a minimum fuel reserve indicator lamp in the tank (with an orange filter); 8 - a parking light indicator lamp (with a green filter); 9 - a brake system emergency state signal lamp (with a red filter); 10 - a high beam indicator lamp (with a blue filter); 11 - a button for resetting the daily trip meter, switching the time and ambient temperature indication and setting the time; 12 - electronic mileage indicator; The upper line of the indicator shows the total mileage of the car, and the lower line - the daily mileage; 13 - engine management system indicator lamp (with an orange light filter) "CHECK ENGINE"; 14 - hazard warning light indicator lamp (with a red light filter); Lights up with a flashing light when the hazard warning light is turned on; 15 - time and temperature indicator; 16 - low battery indicator lamp (with a red light filter); 17 - parking brake indicator lamp (with a red light filter); 18 - emergency oil pressure drop indicator lamp (with a red light filter); 19 - reserve

Temperature and fuel level indicators are magnetoelectric. The tachometer and speedometer needles are driven by stepper motors.

The electronic instrument cluster cannot be repaired, except for replacing the control lamps and instrument lighting lamps.

The component units of the instrument cluster are not supplied as spare parts. Therefore, if one of the devices fails, the cluster should be replaced as an assembly.

Addresses of the instrument cluster output plugs

To avoid damaging the instrument cluster glass, do not clean it with any solvents.

You can wash it with a mild soap solution. It is best to use a glass cleaner, such as "Sekunda".

Method for troubleshooting instruments

When the coolant temperature gauge needle is constantly at the beginning of the scale, with the ignition on, disconnect the wire from the gauge sensor and connect the tip of the wire to the "ground".

If the needle deflects, the sensor is faulty and must be replaced, and if it does not deflect, check the needle in the instrument cluster and the wire connecting the sensor and the needle.

If the temperature gauge is faulty, replace the instrument cluster.

The method for checking the fuel gauge is similar to that described above.

If the needle is constantly at the beginning of the scale and does not deflect after connecting the tip of the wire disconnected from the sensor to the "ground", check the needle.

If the fuel gauge is faulty, replace the instrument cluster.

Checking instruments

The instrument cluster has a built-in self-diagnostic system. This system allows you to test the instrument cluster on the car.

1. With the ignition off, press and hold the daily mileage reset button. Turn on the ignition and release the button.

After this, the instrument cluster goes into the "test" mode: the arrows of all instruments move three times over the entire range of the scale and all segments of the liquid crystal indicator (LCD) are illuminated.

2. Clear the memory of the processor of the electronic instrument cluster by pressing the odometer reset button and holding it for at least 5 seconds.

3. Conduct a repeat test. After this, briefly press and release the odometer reset button.

The LCD will show I am the processor software version number (Uer 0.8, Uer 1.1 or other).

4. Pressing the reset button again will display one of the following codes:

0 – no faults; 1 – microprocessor faulty;
2 – fuel gauge sensor circuit open;
4 – high voltage in the on-board network (more than 16+1.8 V);
8 – low voltage in the on-board network (less than 8–0.6 V).

If there are several faults, the corresponding sum of codes is displayed, for example: 6 (2+4), 10 (2+8), 12 (4+8), 14 (2+4+8).

You can also check the coolant temperature gauge. To do this, use the reference data from the table.

Data for checking the coolant temperature gauge

Temperature - Voltage supplied to the sensor - Resistance (Ohm):

30 - 8 - 1350-1880;
50 - 7.6 - 585-820;
70 - 6.85 - 280-390;
90 - 5.8 - 155-196

The oil pressure warning light sensor is installed in the cylinder head.

The sensor contacts should close and open at a pressure of 20–60 kPa (0.2–0.6 kgf/cm ²).

The fuel level indicator sensor is combined with an electric fuel pump installed in the fuel tank.

The sensor has a variable resistor made of nichrome wire.

The movable contact of the resistor moves under the action of the lever with the float.

With an empty tank (lower position of the float), the sensor resistance should be 315–345 Ohm, with a half-filled tank - 108–128 Ohm, and with a full tank - no more than 7 Ohm.