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S90 & V90

  1. Disconnect negative battery cable. Disconnect fuel level sensor connector and measure resistance between Gray/White and Brown wires. Resistance should be 0-280 ohms (15-gallon tank) or 0-367.5 ohms (21-gallon tank). If resistance is not as specified, replace fuel level sensor. See FUEL LEVEL SENSOR  under REMOVAL & INSTALLATION.
  2. Add 2 1/2 gallons (9L) of fuel to tank. Resistance should increase 5 ohms each 1/4 gallon (1L). If resistance does not increase as specified, replace fuel level sensor.
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