Terminals Of Ecu

WARNING: This page is about a different car, the 2009 Lexus GS 450h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK OCCUPANT CLASSIFICATION ECU

Fig 1: Identifying Occupant Classification ECU Connector Terminal a17

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
a17-5 (GND) - Body ground	W-B - Body ground	Occupant classification ECU ground line	Always	Below 1 Ω
a17-6 (PS) - a17-15 (GPS)	P - V	Pressure sensor signal line	Power switch ON (IG)	Below 1 V
a17-7 (VPS) - a17-5 (GND)	R - W-B	Pressure sensor +B line	Power switch ON (IG)	4.75 to 5.25 V
a17-8 (GBT) - a17-5 (GND)	GR - W-B	Belt tension sensor ground line	Always	Below 1 V
a17-9 (IG) - a17-5 (GND)	L - W-B	Occupant classification ECU +B line	Power switch ON (IG)	10 to 14 V
a17-10 (DIA) - a17-5 (GND)	R - W-B	Diagnosis (DLC3)	Power switch ON (IG)	Pulse generation
a17-11 (FSR+) - a17-12 (FSR-)	L - P	Center airbag sensor communication line	Power switch ON (IG)	Pulse generation
a17-12 (FSR-) - a17-5 (GND)	P - W-B	Center airbag sensor communication line (-)	Always	Below 1 Ω
a17-13 (BSW) - a17-14 (BGND)	W - Y	Passenger side buckle switch line	Power switch ON (IG)	Low: 4 to 7 mA Hi: 12 to 18 mA
a17-14 (BGND) - a17-5 (GND)	Y - W-B	Passenger side buckle switch ground line	Always	Below 1 Ω
a17-15 (GPS) - a17-5 (GND)	V - W-B	Pressure sensor ground line	Always	Below 1 Ω
a17-16 (BT) - a17-5 (GND)	BR - W-B	Belt tension sensor signal line	Power switch ON (IG)	Below 1 V
a17-17 (VBT) - a17-5 (GND)	G - W-B	Belt tension sensor +B line	Power switch ON (IG)	4.75 to 5.25 V