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Home >> Lexus >> 2002 >> LX 470 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System >> Circuit Tests >> Ignition Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. Remove the left hand cowl side junction block (behind the left kick panel) fuse box opening cover. Remove the ECU-IG fuse (15-amp) fuse. Check the continuity of the ECU-IG fuse. If there is continuity, go to the next step. If there is not continuity, check for a short in all the harnesses and components connected to the ECU-IG fuse. See Figure.
  2. Disconnect the theft deterrent ECU connectors located behind the instrument panel. See COMPONENT LOCATIONS . Turn the ignition switch ON and measure the voltage. Connect the positive (+) lead to connector T6 terminal No. 13 (IG) of the theft deterrent ECU and the negative (-) lead to body ground. See CONNECTOR IDENTIFICATION . If voltage is 10-14 volts, check and replace the theft deterrent ECU. If the voltage is not as specified, check and repair the harness and connector between the theft deterrent ECU and battery.
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