Suzuki SY413 Service Manual page 2688

DTC P0500 VEHICLE SPEED SENSOR (VSS) MALFUNCTION (EXCEPT FOR
G13 WITH A/T)
CIRCUIT DESCRIPTION
1. From ignition switch
2. Speedometer in combination meter
3. VSS (speedometer driven gear)
DTC DETECTING CONDITION
D VSS signal not inputted while vehicle running in "D"
range or during fuel cut at deceleration.
: 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 acci-
dent 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.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (G13/G16 ENGINE WITH WU TWC) 6-1-89
POSSIBLE CAUSE
D "B/Or" circuit open
D "V" or "V/Y" circuit open or short
D VSS (speedometer driven gear) malfunction
D ECM malfunction
D Speedometer malfunction