Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT THEFT WARNING ECU ASSY (POWER SOURCE)
1. Disconnect the theft warning ECU assy connector.
2. Measure the voltage between the theft warning ECU assy connector and the body ground, as shown in Fig 1 and Fig 2.
  
  Fig 1: Identifying Theft Warning ECU Assy Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Theft Warning ECU Assy Connectors Voltage Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )

OK: Go to next step.
CHECK WIRE HARNESS (THEFT WARNING ECU ASSY - BODY GROUND)
1. Disconnect the theft warning ECU assy connector.
2. Check the continuity between the theft warning ECU assy connector and the body ground, as shown in Fig 3 and Fig 4.
  
  Fig 3: Identifying T6 ECU Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 4: Theft Warning ECU Assy Connector Continuity Specification Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
  
  OK: CHECK AND REPLACE THEFT WARNING ECU ASSY (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )