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 FUSE (ECU-B, PWR SEAT, ECU-IG, AM1)
1. Remove ECU-B, PWR SEAT, ECU-IG and AM1 fuses from the driver side J/B.
2. Measure the resistance.
  Standard: Below 1 Ω
NG: REPLACE FUSE

OK: Go to next step.
INSPECT POSITION CONTROL ECU & SWITCH ASSY
1. Disconnect M6 and M7 ECU connectors.
2. Measure the voltage of each terminal of the wire harness side connectors.
  
  Fig 1: Identifying Terminal M6, M7 ECU Connectors
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 2: Position Control ECU Specified Condition Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance between M7 ECU wire harness side connector and body ground.
Standard:

Fig 3: Switch Assembly Specified Condition 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 )