Suzuki WagonR+ RB310 Service Manual page 1843

6-1-80 GENERAL INFORMATION AND ENGINE DIAGNOSIS
DTC P0500 VEHICLE SPEED SENSOR (VSS) MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITION
D While fuel is kept cut at lower than 4000 r/min for
longer than 4 sec.
D VSS signal not inputted.
2 driving cycle detection logic, continuous
monitoring.
DTC CONFIRMATION PROCEDURE
WARNING:
D When performing a road test, select a place where there is no traffic or possibility of a traffic accident
and be very careful during testing to avoid occurrence of an accident.
D Road test should be carried out with 2 persons, a driver and a tester.
1) Clear DTC and warm up engine to normal operating temperature.
2) Increase vehicle speed to 50 mph, 80 km/h in 3rd gear or "2" range while observing vehicle speed displayed
on scan tool.
3) Release accelerator pedal and with engine brake applied, keep vehicle coasting (fuel cut condition) for 4 sec.
or more.
4) Check pending DTC and DTC.
Power supply from ignition switch
Vehicle speed sensor
VSS
signal
rotor
To speedometer
POSSIBLE CAUSE
D "BRN" circuit open
D "PPL" or "BLK/WHT" circuit open or short
D VSS (speedometer driven gear) malfunction
D ECM malfunction
D Speedometer malfunction