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Home › Lexus › 2003 › SC 430 › Repair and Diagnosis › Body & Frame › Door Locks › Power Door Lock Control System - Diagnosis › Automatic Locking Function By Vehicles Speed Does Not Work › Inspection Procedure

Inspection Procedure

  1. CHECK SPEEDOMETER FUNCTION 
    1. Check that the speedometer operates properly.
    1. NG: GO TO COMBINATION METER SYSTEM (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 SYMPTOM 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 DOOR LOCK FUNCTIONS OTHER THAN AUTOMATIC LOCK FUNCTION OPERATE PROPERLY BY VEHICLE SPEED 
    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 
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