TSB's

Roving fuel gauge

Owners of 2010-2011 Range Rover Sport LS vehicles may complain about an erratic, inoperative or fluctuating fuel gauge, or a gauge intermittently switching on/off.

These issues may be caused by a poor harness connection or backed-out terminals inside the fuel tank, fuel pump module or flange assembly.

NOTE: If the fault is intermittent and cannot be verified during diagnosis, all of the checks in this TSB should be carried out and repaired as required. If a failure to the harness or individual fuel sender cannot be verified at any point during the diagnostic stage, both fuel level senders and the fuel pump module assembly should be replaced to avoid the possibility of a repeat repair.

PARTS TO BE USED ONLY IF NO WIRING FAULT IS FOUND

CN100509                  Clip

LR000966                   Gasket

LR028456                   Flange

LR014999                   Rear (active) float sender – LR4

LR015940                   Front (passive) float sender – LR4

LR015377                   Front (passive) float sender – Range Rover Sport

LR021911                   Rear (active) float sender – Range Rover Sport

TOOLS REQUIRED

IDS with latest IDS-DVD and calibration file

Land Rover-approved Midtronics Vehicle Power Supply

Refer to workshop manual for any required special tools

REPAIR PROCEDURE

  1. refer to workshop manual, section 310-01: Fuel Tank and Lines. Use a suitable transmission jack to lower the fuel tank only enough to access the top of the tank.
  2. Pull the flange/harness connector (C0114) upwards (Figure 1).
  3. Turn the ignition ON and observe fuel gauge operation.

-          If the fuel gauge drops to “0” (empty), turn the ignition OFF, remove the connector and verify pin connections.

-          After repairing harness/connector pins, perform steps 2 and 3 again.

-          If the concern is verified to be in the flange area and all connections are secure, replace the flange assembly.

-          After replacing the flange assembly, perform steps 2 and 3 again.

-          If no fault was found, continue to Fuel Tank Diagnosis and Testing.

FUEL TANK DIAGNOSIS AND TESTING

  1. Refer to workshop manual section 310-01: Fuel Tank and Lines and perform the appropriate diagnostic and repair procedure(s).

-          Backed out pin/wire could be any of the wires on the connector assembly(s). All must be checked (Figure 2).

Figure 1. Pull the flange/harness connector upwards and observe fuel gauge operation with ignition ON.
<p>Figure 1. Pull the flange/harness connector upwards and observe fuel gauge operation with ignition ON.</p>

Figure 2. Check all pins/wires for back-out.
<p>Figure 2. Check all pins/wires for back-out.</p>

Tags: Fuel gauge 
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