Possible malfunctions
An incorrect reading of the coolant temperature, while at the same time an inaccurate reading of the fuel level, may indicate damage to the voltage stabilizer.
If there is no indication, then there is a defect in the sensor or device.
Instrument Testing Instructions
Checking the temperature sensor: remove the yellow-blue or yellow-red wire from the sensor and connect it securely to "weight" (corps).
Briefly switch on the ignition. If the arrow moves to the red area and the light diode in the device flickers, this means that the temperature sensor has a defect.
Checking the pointer: remove the dashboard.
Tolerance fields are indicated for the pointer on the scale: respectively, three white dashes mark the neutral and final positions of the pointer.
Check: in the neutral position, the needle is within the tolerance range?
For further testing of the pointer, a charged 9V battery is best, as this corresponds to the operating voltage.
Keep the battery poles near the pins located at the back.
The arrow should deviate: if not, then the poles must be changed.
With the correct indication, the arrow moves along the scale to the opposite tolerance area.
In the neutral position, the arrow of the device must be within the left margin (1) tolerance. At full operating voltage (9-9.5 V) the arrow moves to the right area (2)
If the end position of the pointer is not reached despite the prescribed correct battery voltage, the pointer must be changed.
To further check, remove the central connector.
Black wire contact (terminal 15) in the central connector, connect with the 12 V battery pole.
Connect the purple-black wire to the minus (fuel gauge) or yellow-blue, or yellow-red cable (temperature gauge).
If the arrow does not move, then the circuit in the board is open.
If the arrow moves to its extreme position, then there is a defect in the supply wire.
LED test: press the minus of the 9 V battery to the middle clamp behind the indicator device; plus connect to the side contact.
The LED should now blink.
If the LED does not work when checking the temperature sensor (but it's flickering at the moment), means there is a defect in the board.
The red flickering light diode in the temperature gauge does not change, only together with the device.
Visitor comments