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Home >> Lexus >> 1997 >> ES 300 >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Keyless Entry System >> System Testing >> Ignition Switch Circuit Test
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Ignition Switch Circuit Test

Check ECU-IG fuse (15-amp) in instrument panel fuse panel. Disconnect ECU harness connector. Turn ignition on. Measure voltage between ground and door lock ECU harness connector terminal No. 13. See Figure. If battery voltage exists, circuit is okay. Return to TROUBLE SHOOTING . If battery voltage does not exist, repair ignition power circuit. See WIRING DIAGRAMS .