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.

CHECK HARNESS AND CONNECTOR (POSITION CONTROL ECU & SWITCH ASSY - BATTERY)
1. Disconnect M6 ECU connector.
2. Measure the voltage of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 2: Harness and Connector (Position Control ECU & Switch Assy. - Battery) Voltage Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )
  
  NG: Go to next step.
INSPECT PARK/NEUTRAL POSITION SWITCH ASSY
1. Disconnect A4 switch connector.
2. Measure the resistance of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 4: Park/Neutral Position Switch Assy Resistance Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSY (See PARK/NEUTRAL POSITION SWITCH )
  
  OK: Go to next step.
CHECK HARNESS AND CONNECTOR (BATTERY - PARK/NEUTRAL POSITION SWITCH ASSY)
1. Measure the voltage of each terminal of the wire harness side connectors.
  
  Fig 5: Checking Harness And Connector A4
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: Harness & Connector (Battery - Park/Neutral Position Switch Assy) Voltage Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: Go to next step.
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSY - POSITION CONTROL ECU & SWITCH ASSY)
1. Measure the resistance of each terminal of the wire harness side connectors.
  
  Fig 7: Identifying Wire Harness Side M6
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 8: Identifying Wire Harness Side A4
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 9: Park/Neutral Position Switch Assy - Position Control ECU & Switch Assy Resistance Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE (See PROBLEM SYMPTOMS TABLE )