Terminals Of Ecu

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

CHECK DISTANCE CONTROL ECU

Fig 1: Identifying J17 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J17-1 (+B) - J17-12 (GND)	B - BR	Battery	Always	11 to 14 V
J17-8 (CANH) - J17-12 (GND)	GR- BR	CAN communication signal	CAN communication circuit	Pulse generation
J17-9 (CANL) - J17-12 (GND)	W - BR	CAN communication signal	CAN communication circuit	Pulse generation
J17-10 (SGND) - Body ground	BR - Body ground	Ground	Always	Below 1 V
J17-12 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 V
J17-13 (IGB) - J17-12 (GND)	P - BR	Engine switch on signal	Engine switch off	Below 1 V
J17-13 (IGB) - J17-12 (GND)	P - BR	Engine switch on signal	Engine switch on (IG)	11 to 14 V
J17-16 (MODE) - J17-12 (GND)	R - BR	Cruise distance switch assembly signal	Engine switch on (IG), cruise distance switch assembly signal ON	0 to 2 V
J17-16 (MODE) - J17-12 (GND)	R - BR	Cruise distance switch assembly signal	Engine switch on (IG), cruise distance switch assembly signal OFF	11 to 14 V
J17-22 (LRDD) - J17-10 (SGND)	BE - BR	Millimeter wave radar sensor input signal	Engine switch on (IG)	Pulse generation (see waveform 1)
J17-23 (LRRD) - J17-10 (SGND)	L - BR	Millimeter wave radar sensor output signal	Engine switch on (IG)	Pulse generation (see waveform 2)

Reference: waveform 1

Fig 2: Identifying Reference Voltage Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:
- Terminal: J17-22 (LRDD) - J17-10 (SGND)
- Gauge set: 2 V/DIV., 10 msec./DIV.
- Condition: Engine switch on (IG)
Reference: waveform 2

Fig 3: Identifying Reference Voltage Waveform
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:
- Terminal: J17-23 (LRRD) - J17-10 (SGND)
- Gauge set: 2 V/DIV., 5 msec./DIV.
- Condition: Engine switch on (IG)

CHECK ECM (for 2UR-GSE)

Fig 4: Identifying ECM Connector Terminal Identification

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A5-12 (ST1-) - E6-1 (E1)	G-W - W-B	Stop light signal	Engine switch on (IG), Brake pedal depressed (Stop light switch on)	Below 1 V
A5-12 (ST1-) - E6-1 (E1)	G-W - W-B	Stop light signal	Engine switch on (IG), Brake pedal released (Stop light switch off)	11 to 14 V
A5-13 (STP) - E6-1 (E1)	R-B - W-B	Stop light signal	Brake pedal released (Stop light switch off)	Below 1 V
A5-13 (STP) - E6-1 (E1)	R-B - W-B	Stop light signal	Brake pedal depressed (Stop light switch on)	11 to 14 V
A5-16 (LGND) - Body ground	B - Body ground	Ground	Always	Below 1 V
A5-17 (CCHG) - E6-1 (E1)	B-L - W-B	Mode signal	Engine switch on (IG), Cruise control main switch on, MODE switch on	Below 1 V
A5-17 (CCHG) - E6-1 (E1)	B-L - W-B	Mode signal	Engine switch on (IG), Cruise control main switch on, MODE switch off	11 to 14 V
A6-15 (CCS) - E6-1 (E1)	L-B - W-B	Mode signal	Engine switch on (IG)	11 to 14 V
A6-15 (CCS) - E6-1 (E1)	L-B - W-B	Mode signal	CANCEL switch on	6.6 to 10.1 V
A6-15 (CCS) - E6-1 (E1)	L-B - W-B	Cruise control main switch signal	- (COAST)/SET switch on	4.5 to 7.1 V
A6-15 (CCS) - E6-1 (E1)	L-B - W-B	Cruise control main switch signal	+ (ACCEL)/RES (RESUME) switch on	2.3 to 4.0 V
A6-15 (CCS) - E6-1 (E1)	L-B - W-B	Cruise control main switch signal	Main switch on	Below 1 V
E6-1 (E1) - Body ground	W-B - Body ground	Ground	Always	Below 1 V

If the value is not within the specified range, the ECM may have a malfunction.