Inspection Procedure

Check ECU-B2 fuse.
1. NG: CHECK FOR SHORT IN ALL THE HARNESS AND COMPO-NENTS 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)
Fig 1: Checking Continuity Between Terminal SGND Of Power Seat Control ECU Connector
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1. NG: Repair or replace harness or connector.
2. OK: Go to Next Step.
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: Checking Voltage Between Terminal SYSB Of Power Seat Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002