Fuel Sender Resistance Reading (SSM51137)

Publication date: 2011-08-09
Reference number: SSM51137

FUEL SENDER RESISTANCE READING

TECHNICAL SERVICE BULLETIN

Reference Number(s): SSM51137, Date of Issue: August 9, 2011

LAND ROVER:	Range Rover Evoque, LR2, Range Rover, New Range Rover, LR3, LR4, Range Rover Sport
CATEGORY:	Electrical
LAST MODIFIED:	09-Aug-2011
SYMPTOM:	203000 Basic Electrical

ISSUE

When investigating customer reports for incorrect fuel gauge concerns the dealer technician may diagnose that the fuel senders are open circuit. This diagnosis may be incorrect depending on the multimeter settings selected by the technician during measurement.

CAUSE

The multi meter range maybe set at 'auto' and during a sweep of the sender from 50ohms to 998ohms the multi meter has to change its measurement range. For approximately 1 second, during the range switch over point, the multi meter display indicates an open circuit. This is incorrectly being diagnosed as a sender fault

ACTION

When measuring fuel sender resistance values with a multimeter please ensure it is not in the 'Auto' setting and is set to 'Manual'. This will help prevent incorrect diagnosis and unnecessary changes to fuel senders.