Inspection Procedure

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

Check ECU-B2 fuse.
1. NG : Check for short in all the harness and components connected to the ECU-B2 fuse, and repair them.
2. OK : GO TO NEXT STEP
Check continuity between terminal SGND of Power Seat Control ECU connector and body ground.
CHECK:

Measure resistance between terminal SGND of Power Seat Control ECU connector and body ground.

OK:
1. Resistance: Continuity (below 1 Ω)
1. NG : Repair or replace harness or connector.
2. OK : GO TO NEXT STEP
Fig 1: Identifying Power Seat Control ECU Connector Terminal SGND
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Check voltage between terminal SYSB of Power Seat Control ECU connector and body ground.
CHECK:

Measure voltage between terminal SYSB of Power Seat Control ECU connector and body ground.

OK:
1. Voltage: 10 - 14 V
1. OK : Proceed to next circuit inspection shown on problem symptom table (See PROBLEM SYMPTOMS TABLE ).
2. NG : Repair or replace harness or connector.
Fig 2: Identifying Power Seat Control ECU Connector Terminal SYSB
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002