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Home >> Lexus >> 1998 >> GS 300 >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> System Tests >> Coolant Gauge

Coolant Gauge

  1. Connect Lexus Hand-Held Tester (scan tool) to DLC3 connector. Turn ignition on. Turn on scan tool and select ACTIVE TEST. If gauge tests properly, go to next test listed in GAUGE TEST INDEX  table. If gauge does not operate properly or scan tool is not available, go to next step.
  2. Check engine coolant temperature gauge. See ENGINE COOLANT TEMPERATURE GAUGE  under COMPONENT TESTS. Check engine coolant temperature sending unit. See ENGINE COOLANT TEMPERATURE SENDING UNIT  under COMPONENT TESTS. Check instrument cluster circuit plate. See CIRCUIT PLATE  under PIN VOLTAGE TESTS. Check instrument cluster. See INSTRUMENT CLUSTER CIRCUIT  under PIN VOLTAGE TESTS. Repair or replace as necessary.
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