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Fuel Sender Main & Sub Gauge Circuit

NOTE: If LEXUS scan tool is available, start test from step  1. If this scan tool is not available, start test from step  2.
  1. Using scan tool, check fuel sender main and sub gauge using DATA LIST. If fuel sender main and sub gauge are faulty, go to next step. If fuel sender main and sub gauge are okay, go to next test listed in BODY NO. 4 CONTROL SYSTEM  table under TROUBLE SHOOTING .
  2. Check fuel sender main gauge. See FUEL GAUGE in INSTRUMENT PANELS - LS430 article. Replace fuel sender main gauge as necessary. If fuel sender main gauge is okay, go to next step.
  3. Check wiring and connectors between fuel sender main gauge and body No. 4 ECU. Repair wiring as necessary. If wiring is okay, check fuel sender sub gauge. See FUEL GAUGE in INSTRUMENT PANELS - LS430 article. Replace fuel sender sub gauge as necessary. If fuel sender sub gauge is okay, check wiring and connectors between fuel sender sub gauge and body No. 4 ECU. Repair wiring as necessary. If wiring is okay, go to next test listed in BODY NO. 4 CONTROL SYSTEM  table under TROUBLE SHOOTING .
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