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Home >> Lexus >> 1998 >> SC 400 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System - Remote >> System Tests >> Door Key Lock & Unlock Switch Circuit Test >> Unlock Circuit
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Unlock Circuit

Backprobe for voltage between ground and wireless door lock ECU terminal No. 7 (Green wire). See Figure. Battery voltage should exist. If battery voltage exists, proceed to next test listed in TROUBLE SHOOTING . If battery voltage does not exist, check circuit between wireless door lock ECU and door key lock and unlock switch. See WIRING DIAGRAMS . Repair or replace circuit as necessary. Retest system operation.