Suzuki 2000 Grand Vitara SQ625 Service Manual page 628

6E2-40 ENGINE AND EMISSION CONTROL SYSTEM (H25 ENGINE)
VEHICLE SPEED SENSOR (VSS)
On-Vehicle Inspection
1) Hoist vehicle.
2) Release parking brake lever, set transmission in neutral and
transfer in "2H".
3) Remove ECM (PCM) cover.
4) Connector voltmeter between VSS terminal C51-3-1 of ECM
(PCM) connector and body ground.
5) Turn ignition switch ON and turn rear right tire slowly with rear
left tire locked.
Voltmeter should indicate deflection between 0 – 1 V and 8 – 14 V
a few times while tire is turned one revolution.
If check result is not satisfactory, proceed to flow table of DTC
P0500 in "ENGINE" section.
Removal, Inspection and Installation
Refer to "VSS Removal, Inspection or Installation" in "TRANSFER"
section.