Inconsistent fuel gauge readings

INCONSISTENT FUEL GAUGE READINGS

Model

Range Rover

Affected vehicles

All petrol derivatives up to VIN WA 410482 - see PARTS INFORMATION for further details.

Date

1999-03-03

Reference

Bulletin 0011, CDS ref L8503bu

Bulletin text

Range Rover

AFFECTED RANGE:

All petrol derivatives up to VIN WA 410482 - see PARTS INFORMATION for further details.

PROBLEM:

INCONSISTENT FUEL GAUGE READINGS The customer complains that the fuel gauge does not indicate full despite filling the tank.

CAUSE:

A build up of contaminants on the fuel gauge sender unit, which increases the sender unit resistance, causing the gauge to incorrectly indicate a lower fuel level.

ACTION:

Where a customer complains of low fuel gauge indication when the tank is full and/or inconsistent gauge readings, replace the sender unit as detailed below.

1. Lower fuel tank from vehicle and remove tank unit, Manual number 88.25.32 refers.

2. Examine the sender unit resistor board for identification mark ‘VDO’ or ‘38A’ shown in illustration 1).

Bulletin N o : 0011 L8503bu 1 03.03.99

repair

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3. If marked ‘VDO’, replace the entire tank unit with part number STC4344 and refit fuel tank to vehicle.

If marked 38A, replace the sender unit only, as follows:

1. Disconnect one large and one small sender unit connector from the top of the tank unit, (arrowed in illustration 2).

2. Carefully release 4 clips around pump housing (arrowed in illustration 3), and lower the housing to disengage pump from mounting lugs in base.

3. Carefully pivot the pump assembly to enable access past the convoluted fuel pipe to the pozidrive screw retaining the sender unit to the tank unit housing, (illustration 4 refers).

7. Align the four pump housing clips with the tank unit housing and carefully push fully home.

8. Fit the two sender unit connectors to the terminals at the top of the tank unit.

9. Refit sender unit to tank and refit tank to vehicle, repair number 88.25.32 refers.

PARTS INFORMATION:

STC4344 Tank unit complete - up to VIN TA 323598 with ‘VDO’ type sender NRC9771 Olive - fuel pipe (2 per vehicle - as required) NRC9770 Tube nut - fuel pipe (2 per vehicle - as required) WGI100000 Sender unit only - any vehicle with ‘38A’ type sender up to WA 410482-

WARRANTY CLAIMS: Use Complaint Code: 7U8U Use S.R.Os: 19.45.08 Tank unit complete - renew Time allowance: 1.50Hrs 88.25.32 Sender unit only - renew Time allowance: 1.60Hrs

fuel

4. Remove pozidrive screw from sender unit and remove sender unit.

5. Fit new sender unit WGI100000 to the tank unit housing, locate and tighten pozidrive screw.

6. Align fuel pump with mounting lugs in base of fuel pump housing.