Terminals Of Ecu

WARNING: This page is about a different car, the 2011 Toyota Matrix. However, it is still accessible from the selected car via links, so may be relevant.

OCCUPANT CLASSIFICATION ECU

Fig 1: Occupant Classification ECU S2 Connector Terminal Identification

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
S2-3 (GSP) - S2-5 (GND)	O - W-B	Seat position sensor (for front passenger side) ground line	Always	Below 1 Ω
S2-4 (SP) - S2-5 (GND)	V - W-B	Seat position sensor (for front passenger side) ground line	Always	Low: 5.0 to 6.9 mA Hi: 12 to 17 mA
S2-5 (GND) - Body ground	W-B - Body ground	Occupant classification ECU ground line	Always	Below 1 V
S2-6 (PS) - S2-15 (GPS)	W - GR	Pressure sensor signal line	Ignition switch ON	Below 1 V
S2-7 (VPS) - S2-5 (GND)	LG - W-B	Pressure sensor +B line	Ignition switch ON	4.75 to 5.25 V
S2-8 (GBT) - S2-5 (GND)	Y - W-B	Belt tension sensor ground line	Always	Below 1 V
S2-9 (IG) - S2-5 (GND)	B - W-B	Occupant classification ECU +B line	Ignition switch ON	10 to 14 V
S2-10 (DIA) - S2-5 (GND)	W - W-B	Diagnosis (DLC3)	Ignition switch ON	Pulse generation
S2-11 (FSR+) - S2-12 (FSR-)	W - B	Center airbag sensor assembly communication line	Ignition switch ON	Pulse generation
S2-12 (FSR-) - S2-5 (GND)	B - W-B	Center airbag sensor assembly communication line (-)	Always	Below 1 V
S2-13 (BSW) - S2-14 (BGND)	G - P	Passenger side buckle switch line	Ignition switch ON	Low: 4 to 7 mA Hi: 12 to 18 mA
S2-14 (BGND) - S2-5 (GND)	P - W-B	Passenger side buckle switch ground line	Always	Below 1 V
S2-15 (GPS) - S2-5 (GND)	GR - W-B	Pressure sensor ground line	Always	Below 1 V
S2-16 (BT) - S2-5 (GND)	R - W-B	Belt tension sensor signal line	Ignition switch ON	0 to 5 V
S2-17 (VBT) - S2-5 (GND)	G - W-B	Belt tension sensor +B line	Ignition switch ON	4.75 to 5.25 V