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.

READ VALUE OF 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 items below in the DATA LIST and read the displays on the hand-held tester.
  Each Door ECU:
  
  Fig 1: Hand-Held Tester Val Uses
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK:

"ON" (lock switch is pressed) appears on the screen.

NG: Go to step 2

OK: Go to next step

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
CHECK WIRE HARNESS (OUTSIDE DOOR HANDLE - DOOR ECU) (OUTSIDE DOOR HANDLE OR DOOR ECU - BODY GROUND)
1. Disconnect the D25, F17, R12 and R15 door ECU connectors.
2. Disconnect the F21, F22, R33 and R34 outside door handle connectors.
3. Measure the resistance between the wire harness side connectors.
  Standard:
  
  Driver side
  
  Fig 2: Resistance Specifications (1 Of 4)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Passenger side
  
  Fig 3: Resistance Specifications (2 Of 4)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear LH
  
  Fig 4: Resistance Specifications (3 Of 4)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Rear RH
  
  Fig 5: Resistance Specifications (4 Of 4)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002