Checking the fuel gauge
1. Disconnect the connector from the fuel level sensor.
2. Turn on the ignition and check that the arrow of the fuel gauge points to the mark "EMPTY" (empty).
3. Connect a test lamp with a power of 3 W between the terminals "2" And "3" (models since 1996 - conclusions "3" And "4") wire side connector.
4. Turn on the ignition, check that the control lamp lights up and the arrow of the fuel level indicator deviates to the side "FULL" (full).
Note: Because the fuel level gauge is filled with silicone oil, the gauge pointer moves slowly.
If the sensor does not work as described, replace the sensor.
Checking the resistance of the fuel gauge
Measure the resistance between the leads:
Models up to 1996 with tachometer
Resistance between pins:
- F—E «131 ohm
- F—IG «123 ohm
- IG-E «304 ohm
Models after 1996
Resistance between terminals'
- A-B «252 ohm
- A - C «355 ohm
- B - C «103 ohm
If the resistance is not as specified, replace the pointer.
Checking the operation of the fuel level sensor
1. Disconnect the connector from the fuel level sensor.
2. Connect "+" DC voltage source 4.5 V (e.g. 3 batteries) to the conclusion "2" through a control lamp 3.4 W, "-" connect the source to the output "3".
3. Check that the voltage between the terminals "2" And "3" the lamp comes on), when the float of the sensor is lowered from the upper to the lower position.
Sensor Resistance Test
Models up to 1996
Measure resistance between leads "2" And "3" for each float position.
Models after 1996
Measure resistance between leads "2" And "3" for each float position.
Checking the fuel reserve indicator
1. Disconnect the connector from the fuel level sensor.
2. Short the leads "1" And "3" wire side connector.
3. Turn on the ignition, check that the fuel reserve indicator lights up. Otherwise, check the lamp.
Checking the fuel reserve sensor
1. Connect the battery to the terminals "1" And "3" through a 3.4 W test lamp. Check that the control pump lights up.
Note: The control lamp will light up after a short period of time.
2. Immerse the sensor in fuel. Check that the control lamp has gone out.
If the operation is not as described, replace the sensor.
Fuel filter water sensor
1. Check for continuity between the sensor leads when the float is in the up position.
2. Check for continuity between the sensor leads when the float is in the down position. Replace sensor if not working properly.
Fuel heater
1. Create a vacuum (about 47 kPa) in the pressure sensor.
2. Check for continuity between terminal "1" and switch housing.