LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2005 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Power Door Lock Control System - Diagnostics >> Automatic Locking Function By Vehicles Speed Does Not Work >> Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Inspection Procedure

  1. CHECK SPEEDOMETER FUNCTION 
    1. Check that the speedometer operates properly.
    1. NG: Go to COMBINATION METER (See  MALFUNCTION IN SPEEDOMETER  ) 
    2. OK: Go to next step. 
  2. CHECK DOOR LOCK FUNCTION 
    1. Check that the door lock operates normally.
    1. NG: Go to FLOW CHART OR PROBLEM SYMPTOMS TABLE (See  DTC B1222 DOOR LOCK SWITCH CIRCUIT ON DRIVER DOOR   ,  DTC B1224 DOOR LOCK SWITCH CIRCUIT ON PASSENGER DOOR   ) 
    2. OK: Go to next step. 
  3. CHECK THAT THE DOOR LOCK FUNCTIONS OTHER THAN AUTOMATIC LOCK FUNCTION BY VEHICLE'S SPEED OPERATE PROPERLY 
    1. When all doors do not operate, proceed to A
    2. When the drive's door does not operate, proceed to B
    3. When the passenger's door does not operate, proceed to C
    1. B: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT LH 
    2. C: REPLACE MULTIPLEX NETWORK DOOR ECU FRONT RH 
    3. A: REPLACE THEFT WARNING ECU ASSY 
scientia non olet · About LEMON Manuals