Inspection Procedure

WARNING: This page is about a different car, the 2005 Lexus RX 330. 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 to the DLC3.
2. Turn the ignition switch ON and push the hand-held tester main switch ON.
3. Select the ACTIVE TEST on the hand-held tester to generate a control command, and then check that the power seat operation.
  Standard: Position control ECU & switch assy
  
  Fig 1: Active Test - Position Control ECU And Switch Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  HINT:
  
  During the ACTIVE TEST, the hand-held tester sends a signal to the position control ECU & switch to drive the power seat motors. If the power seat operates, the power seat motor itself, the wire harness between the power seat motors and position control ECU & switch are considered normal.
1. OK INSPECT POSITION CONTROL ECU & SWITCH ASSY (SEE ON-VEHICLE INSPECTION )
2. NG: GO TO NEXT STEP.
INSPECT POWER SEAT MOTOR ASSY (See ON-VEHICLE INSPECTION )
1. NG: REPLACE POWER SEAT MOTOR ASSY
2. OK: Go to next step.
CHECK WIRE HARNESS (POSITION CONTROL ECU & SWITCH ASSY - POWER SEAT MOTOR ASSY AND BODY GROUND)
1. Disconnect the P33 ECU and P34, P35, P37 and P38 motor connectors.
2. Check the resistance of the wire harness side connectors.
  Standard;
  
  Fig 2: Position Control ECU & Switch Assy - Power Seat Motor Assy And Body Ground Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Check Wire Harness (Position Control ECU & Switch Assy - Power Seat Motor Assy And Body Ground)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: REPLACE POSITION CONTROL ECU & SWITCH ASSY