Suzuki Wagon R Manual page 3550

7) After 4 seconds, check for low fuel warning lamp operation
under the following each float position (1) of fuel pump (2).
If faulty condition is found, replace combination meter.
Low fuel warning light operation for G10/M13 engine
Float position
"a" 188.5 – 191.3 mm
(7.43 – 7.53 in.)
"b" 200.9 mm (7.91 in.)
or more
"c" 205.2 mm (8.08 in.)
or more
Low fuel warning light operation for Z13DT engine
Float position
"a" Above "b" position
"b" 184.0 mm (7.24 in.)
or more
"c" 194.3 mm (7.65 in.)
or more
Engine Oil Level Switch for Z13DT Engine (If
Equipped)
Inspection
Check engine oil level switch referring to "Engine Oil Level
Switch" in Section 6E3.
INSTRUMENTATION/DRIVER INFORMATION 8C-5
Low fuel warning
light operation
OFF
ON
Flashing
Low fuel warning
light operation
OFF
ON
Flashing