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Home >> Lexus >> 1998 >> LS 400 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control System >> Circuit Tests >> Wireless Door Lock Tuner Circuit
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Wireless Door Lock Tuner Circuit

  1. Check For DTC 42 Using Scan Tool

    Using scan tool, check for DTC 42. If DTC 42 is not retrieved, go to next step. If DTC 42 is retrieved, check for faults in Pink wire between wireless door lock tuner and body control ECU No. 1. See WIRING DIAGRAMS. Repair or replace as necessary.

  2. Check Circuits

    Check circuits for open between wireless door lock tuner and body control ECU No. 1. If circuits are okay, go to next step. Repair or replace circuits as necessary.

  3. Check Wireless Door Lock Tuner

    Replace original wireless door lock tuner with known-good unit and ensure it recovers normally. If it recovers normally, original wireless door lock tuner failed. If it does not recover normally, go to next test listed in appropriate TROUBLE SHOOTING SYMPTOMS table.
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