Toyota 4Runner: Terminals Of Ecu

Toyota 4Runner Service Manual / Vehicle Interior / Supplemental Restraint Systems / Occupant Classification System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK OCCUPANT CLASSIFICATION ECU

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
a9-1 (+B) - a9-3 (GND)	W - W-B	Battery power supply	Always	11 to 14 V
a9-2 (DIA) - a9-3 (GND)	GR - W-B	Diagnosis (DLC3)	Ignition switch ON	Pulse generation
a9-3 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
a9-4 (FSR-) - a9-3 (GND)	LG - W-B	Center airbag sensor assembly communication line	Always	Below 1 V
a9-5 (BGND) - a9-3 (GND)	P - W-B	Front passenger side buckle switch ground line	Always	Below 1 V
a9-7 (IG2) - a9-3 (GND)	B - W-B	Ignition switch power supply	Ignition switch ON	11 to 14 V
a9-8 (FSR+) - a9-4 (FSR- )	L - LG	Center airbag sensor assembly communication line	Ignition switch ON	Pulse generation
a9-9 (BSW) - a9-5 (BGND)	G - P	Front passenger side buckle switch line	Always	Pulse generation
a10-1 (SGD1) - a9-3 (GND)	G - W-B	Front occupant classification sensor LH ground line	Always	Below 1 V
a10-2 (SGD2) - a9-3 (GND)	LG - W-B	Front occupant classification sensor RH ground line	Always	Below 1 V
a10-3 (SGD3) - a9-3 (GND)	W - W-B	Rear occupant classification sensor LH ground line	Always	Below 1 V
a10-4 (SGD4) - a9-3 (GND)	BR - W-B	Rear occupant classification sensor RH ground line	Always	Below 1 V
a10-11 (SVC1) - a10-1 (SGD1)	R - G	Front occupant classification sensor LH power supply line	Ignition switch ON, load applied to front occupant classification sensor LH	4.9 to 5.1 V
a10-12 (SVC2) - a10-2 (SGD2)	W - LG	Front occupant classification sensor RH power supply line	Ignition switch ON, load applied to front occupant classification sensor RH	4.9 to 5.1 V
a10-5 (SVC3) - a10-3 (SGD3)	GR - W	Rear occupant classification sensor LH signal line	Ignition switch ON, load applied to rear occupant classification sensor LH	4.9 to 5.1 V
a10-6 (SVC4) - a10-4 (SGD4)	V - BR	Rear occupant classification sensor RH signal line	Ignition switch ON, load applied to rear occupant classification sensor RH	4.9 to 5.1 V
a10-7 (SIG1) - a10-1 (SGD1)	P - G	Front occupant classification sensor LH signal line	Ignition switch ON, load applied to front occupant classification sensor LH	0 to 5.1 V
a10-8 (SIG2) - a10-2 (SGD2)	L - LG	Front occupant classification sensor RH signal line	Ignition switch ON, load applied to front occupant classification sensor RH	0 to 5.1 V
a10-9 (SIG3) - a10-3 (SGD3)	SB - W	Rear occupant classification sensor LH power supply line	Ignition switch ON, load applied to rear occupant classification sensor LH	0 to 5.1 V
a10-10 (SIG4) - a10-4 (SGD4)	B - BR	Rear occupant classification sensor RH power supply line	Ignition switch ON, load applied to rear occupant classification sensor RH	0 to 5.1 V

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are lis ...

Data List / Active Test

DATA LIST / ACTIVE TEST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether ...

Other materials about Toyota 4Runner:

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of ...

System Diagram
SYSTEM DIAGRAM Communication Table Transmitting ECU Receiving ECU Signal Communication Method Multiplex network master switch assembly Front power window regulator motor ...