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Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus RX 300 and 2002 Lexus RX 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the power seat position ECU with connectors still connected. Measure the voltage between terminals No. 8 (+B) and 7 (GND) of the power seat position ECU connector. See CONNECTOR IDENTIFICATION . If voltage is 10-14 volts, check the power seat position ECU. If the voltage is not OK, go to the next step.
  2. Measure the resistance between terminal No. 7 (GND) of the power seat position ECU and body ground. If continuity is below 1 ohm, go to the next step. If the continuity is not below 1 ohm, repair or replace the wiring harness or connector.
  3. Remove the power seat position ECU with connectors still connected. Measure voltage between terminals No. 9 (SYSB) and 13 (SGND) of the power seat position ECU connector. If the voltage is 10-14 volts, check the power seat position ECU. If the voltage is not OK, go to the next step.
  4. Measure the resistance between terminal No. 13 (SGND) of the power seat position ECU and body ground. If continuity is below 1 ohm, go to the next step. If the continuity is not below 1 ohm, repair or replace the wiring harness or connector.
  5. Check the SEAT-FR and DOME fuse. If the results are OK, check and repair the connector between the power seat position ECU and battery. If the results are not OK, check for a short in all the wiring harness and components connected to SEAT-FR and DOME fuse, and repair them.
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