BE–119 BODY ELECTRICAL SYSTEM – THEFT DETERRENT AND DOOR LOCK CONTROL SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING HINT: Troubleshooting of the theft deterrent system is based on the premise that the door lock control system is operating normally. Accordingly, before troubleshooting the theft deterrent system, first make certain that the door lock control system is operating normally. For troubleshooting using a volt/ohm meter, see page BE–119. Be sure to use troubleshooting procedure appropriate to the diagnostic tool being used. Perform troubleshooting in accordance with the procedure on the following page. Vehicle Brought to Workshop Titles inside/ /are titles of pages in this manual, with the page number indicated in the bottom portion. See the indicated pages for detailed explanation. 1 Customer Problem Analysis P. BE–120 2 Problem Symptom Confirmation Problem does not occur 3 Symptom Simulation P. IN–24 Problem occurs 4 Matrix Chart of Problem Symptoms P. BE–123 5 Circuit Inspection P. BE–128 Identification of Problem 6 Repair 7 Confirmation Test End Step 5 , 7 : Diagnostic steps permitting the use of the TOYOTA hand–held tester or TOYOTA brake–out–box.