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Home >> Lexus >> 1999 >> GS 300 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Circuit Tests >> Vehicle Speed Sensor (VSS) Circuit >> With Lexus Hand-Held Tester (Scan Tool)

With Lexus Hand-Held Tester (Scan Tool)

  1. Connect scan tool to Data Link Connector No. 3 (DLC3). Turn ignition on. Turn scan tool on and select DATALIST mode. Drive vehicle and check scan tool data. If data changes when vehicle speed changes, replace instrument cluster. If data does not change, go to next step.
  2. Check harness and connectors between instrument cluster and ABS ECU. Repair as necessary. If harness and connectors are okay, check VSS circuit and ABS ECU. See ANTI-LOCK brakes article in WIRING DIAGRAMS.
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