Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING HAND-HELD TESTER
1. Connect the hand-held tester (with CAN VIM) to the DLC3.
2. Turn the ignition switch ON and press the hand-held tester main switch ON.
3. Select the item below in the ACTIVE TEST and then check that the smart indicator operates.
  Theft warning ECU:
  
  Fig 1: Hand-Held Tester Display Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:

Smart indicator turns on and off.

NG: Go to step 2

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
INSPECT RHEOSTAT
1. Remove the rheostat.
2. Apply 12 V positive (+) voltage between the terminals of the indicator and check the lighting condition of the smart indicator.
  OK: Go to next step
  
  Fig 2: Voltage Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Identifying Rheostat
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NOTE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the smart indicator does not illuminate.
- Voltage of more than 12 V will damage the smart indicator.
- If the voltage is too low, the smart indicator will not illuminate.
NG: REPLACE RHEOSTAT

OK: Go to next step
CHECK WIRE HARNESS (RHEOSTAT - THEFT WARNING ECU AND BODY GROUND)
1. Disconnect the R4 rheostat connector.
2. Disconnect the T5 ECU connector.
3. Measure the resistance between the wire harness side connectors.
  Standard:
  
  Fig 4: Voltage Specifications
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Identifying Wire Harness
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )