Terminals Of Ecu

CHECK CLEARANCE WARNING ECU

Fig 1: Identifying Clearance Warning ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
IG (Q37-8) - E (Q37-27)	Y - W-B	IG signal / IG power source	Engine switch on (IG)	10 to 14 V
E (Q37-27) - Body ground	W-B - Body ground	ECU ground	Always	Below 1 Ω
S1 (Q37-5) - E1 (Q37-18)	Y - BR	Ultrasonic sensor (Front right sensor)	Signals are transmitted from ECU to front right sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
S4 (Q37-6) - E4 (Q37-19)	GR - BR	Ultrasonic sensor (Front left sensor)	Signals are transmitted from ECU to front left center sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
S5 (Q37-2) - E5 (Q37-15)	GR - W	Ultrasonic sensor (Rear right sensor)	Signals are transmitted from ECU to front right sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
S6 (Q37-4) - E6 (Q37-17)	P - W	Ultrasonic sensor (Rear left sensor)	Signals are transmitted from ECU to front left sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
S7 (Q37-1) - E7 (Q37-14)	R - W	Ultrasonic sensor (Rear right center sensor)	Signals are transmitted from ECU to rear right center sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
S8 (Q37-3) - E8 (Q37-16)	G - W	Ultrasonic sensor (Rear left center sensor)	Signals are transmitted from ECU to rear left center sensor (During OFF sensing)	Pulse generation (see 1waveform 1)
E1 (Q37-18) - Body ground	BR - Body ground	Ultrasonic sensor (Front right sensor) ground	Always	Bellow 1 Ω
E4 (Q37-19) - Body ground	BR - Body ground	Ultrasonic sensor (Front left sensor) ground	Always	Bellow 1 Ω
E5 (Q37-15) - Body ground	W - Body ground	Ultrasonic sensor (Rear right sensor) ground	Always	Bellow 1 Ω
E6 (Q37-17) - Body ground	W - Body ground	Ultrasonic sensor (Rear left sensor) ground	Always	Bellow 1 Ω
E7 (Q37-14) - Body ground	W - Body ground	Ultrasonic sensor (Rear right center sensor) ground	Always	Bellow 1 Ω
E8 (Q37-16) - Body ground	W - Body ground	Ultrasonic sensor (Rear left center sensor) ground	Always	Bellow 1 Omega;
CBZ (Q37-9) - E (Q37-27)	O - W-B	Buzzer output	Buzzer sounding	Pulse generation (see 2waveform 2)
M+ (Q37-26) - E (Q37-27)	BR - W-B	BEAN communication	Engine switch on (IG), clearance sonar main switch ON	Pulse generation

Reference:

Waveform 1

WAVEFORM REFERENCE

Item	Content
Symbols (Terminal No.)	S1 (Q37-5) - E1 (Q37-18) S4 (Q37-6) - E4 (Q37-19) S5 (Q37-2) - E5 (Q37-15) S6 (Q37-4) - E6 (Q37-17) S7 (Q37-1) - E7 (Q37-14) S8 (Q37-3) - E8 (Q37-16)
Tool Setting	2V/DIV., 100 μsec./DIV.
Condition	Signals are transmitted from ECU to sensor (During OFF sensing)

Fig 2: Identifying Waveform 1

Waveform 2

WAVEFORM REFERENCE

Item	Content
Symbols (Terminal No.)	CBZ (Q37-9) - E (Q37-27)
Tool Setting	2 V/DIV., 1 msec./DIV.
Condition	Buzzer sounding

Fig 3: Identifying Waveform 2