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.

CHECK WIRE HARNESS
1. Disconnect the R28 and R41 oscillator connectors.
2. Measure the voltage and resistance between the wire harness side connectors and body ground.
  Standard:
  
  Luggage oscillator inner:
  
  Fig 1: Voltage Specifications (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Luggage oscillator outer:
  
  Fig 2: Voltage Specifications (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Identifying Oscillator Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPLACE OR REPLACE HARNESS AND CONNECTOR

OK: Go to next step
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 oscillator operates.
  Theft warning ECU:
  
  Fig 4: Hand-Held Tester Values
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:

When the smart key is brought close to a room oscillator that is ON, the indicator on the smart key illuminates.

NG: Go to step 3

OK: Go to next step

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
CHECK WIRE HARNESS (THEFT WARNING ECU - ROOM OSCILLATOR (FRONT AND REAR)) (THEFT WARNING ECU OR ROOM OSCILLATOR (FRONT AND REAR) - BODY GROUND)
1. Disconnect the T5 ECU connector.
2. Disconnect the R28 room oscillator front assy connector.
3. Disconnect the R41 room oscillator rear assy connector.
4. Measure the resistance between the wire harness side connectors.
  Standard:
  
  Room oscillator front:
  
  Fig 5: Resistance Specifications (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Room oscillator rear:
  
  Fig 6: Resistance Specifications (2 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 7: Identifying Wire Harness Theft Warning ECU
  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 )