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Home >> Volvo >> 2013 >> XC90 Base, AWD >> Repair and Diagnosis (Single Page) >> Electrical >> Body Electrical >> Central Electronic Module (CEM) And Rear Electronic Module (Rem) - Diagnostic Trouble Codes >> Rem-4A38: Fuel Level Sensor. Signal Too Low. Permanent Fault (2003-2004) >> Signal Too Low. Permanent Fault >> Checking Wiring And Connectors

Checking Wiring And Connectors

Check the resistance of the fuel level sensor (right-hand side). The resistance across each sensor may vary between 12 ohms (full fuel tank) and 383 ohms (empty fuel tank).

HINT: The resistance of the right-hand side fuel level sensor can be measured between fuel level sensor connector terminals #7 and #6. The resistance of the left-hand side fuel level sensor can be measured between fuel level sensor connector terminals #5 and #6. 

Check the cables between fuel level sensor connector terminal #7 and rear electronic module (REM) terminal #A08 (#A8). Check for a short-circuit to ground. Check for an open-circuit.

Check the ground lead between control module terminal #A10 (#A10) and fuel level sensor connector terminal #6. Check for an open-circuit.

Check the cables between the left and right fuel level sensors. Check for an open-circuit.

Remedy as necessary.

Other information: 

Fig 1: Identifying Fuel Level Sensor Connector Terminals
GLL104042Courtesy of VOLVO CARS CORPORATION
Fig 2: Identifying Ohms Display
GLL101042Courtesy of VOLVO CARS CORPORATION