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Home >> Lexus >> 1995 >> SC 400 >> Repair and Diagnosis >> Electrical >> Gauges >> Instrument Panel >> Component Testing >> Fuel Gauge Sending Unit Test

Fuel Gauge Sending Unit Test

  1. Remove fuel gauge sending unit.
  2. Measure resistance between terminals No. 1 and 3 at fuel gauge sending unit connector while moving float up and down. For fuel gauge sending unit connector identification, see Figure.
  3. Resistance should increase as float lowers. Refer to the FUEL GAUGE SENDING UNIT RESISTANCE  table. Replace sending unit as necessary.
FUEL GAUGE SENDING UNIT RESISTANCE

Float Position Distance From Top In. (mm) Approximate Volts
"F" 2.8 (72) 3
1/2 Full 7.3 (185) 31
"E" 111.9 (305) 110