Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RADIO RECEIVER ASSEMBLY (for 14 Speakers)

Fig 1: Identifying Radio Receiver Assembly Connector (For 14 Speakers)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RADIO RECEIVER ASSEMBLY TERMINAL REFERENCE (FOR 14 SPEAKERS)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I3-6 (SWG) - I4-20 (GND)	BR - W-B	Steering pad switch ground	Always	Below 1 V
I3-7 (SW1) - I4-20 (GND)	LG - W-B	Steering pad switch signal	Steering pad switch not operated	4 V or more
			→ Seek+ switch pushed	→ Approx. 0.5 V
			→ Seek- switch pushed	→ Approx. 0.9 V
			→ Volume+ switch pushed	→ Approx. 2.0 V
			→ Volume- switch pushed	→ Approx. 3.4 V
I3-8 (SW2) - I4-20 (GND)	GR - W-B	Steering pad switch signal	Steering pad switch not operated	4 V or more
			→ MODE switch pushed	→ Approx. 0.5 V
			→ On Hook switch pushed	→ Approx. 0.9 V
			→ Off Hook switch pushed	→ Approx. 2.0 V
I3-11 (IVO+) - I4-20 (GND)	Y - W-B	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
I3-12 (IVO-) - I4-20 (GND)	BR - W-B	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
I3-13 (SLD1) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
I3-15 (ARI) - I4-20 (GND)	R - W-B	Sound signal (Right)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
I3-16 (ASGN) - I4-20 (GND)	W - W-B	Ground	Always	Below 1 V
I3-17 (ALI) - I4-20 (GND)	B - W-B	Sound signal (Left)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
I3-18 (AUXG) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
I3-19 (AUXI) - I4-20 (GND)	SB - W-B	External device connection detection signal	External device is connected	Below 1 V
I4-1 (B) - I4-20 (GND)	L - W-B	Battery	Always	11 to 14 V
I4-2 (ILL+) - I4-20 (GND)	SB - W-B	Illumination signal	Light control switch OFF → TAIL	Below 1 V → 11 to 14 V
I4-5 (ATX+) - I4-20 (GND)	V - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
I4-7 (MUTE) - I4-20 (GND)	GR - W-B	MUTE signal	Audio system is playing → Changing modes	Above 3.5 V → Below 1 V
I4-8 (R+) - I4-20 (GND)	W - W-B	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I4-9 (L+) - I4-20 (GND)	G - W-B	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I4-10 (SLD) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
I4-11 (ACC) - I4-20 (GND)	GR - W-B	Accessory (ON)	Ignition switch ACC	11 to 14 V
I4-12 (ILL-) - I4-20 (GND)	O - W-B	Illumination (rheostat) signal	Light control switch OFF and rheostat switch position medium → TAIL	Below 1 V → Pulse generation
I4-13 (ANT) - I4-20 (GND)	W - W-B	Power source of antenna	Radio switch ON (AM or FM)	11 to 14 V
I4-15 (ATX-) - I4-20 (GND)	P - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
I4-18 (R-) - I4-20 (GND)	R - W-B	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I4-19 (L-) - I4-20 (GND)	B - W-B	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I4-20 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
I9-1 (MIC-) - I4-20 (GND)	Y - W-B	Microphone voice signal	"Bluetooth" handsfree function is ON	A waveform synchronized with sounds is output
I9-2 (MIC+) - I4-20 (GND)	BR - W-B	Microphone voice signal	"Bluetooth" handsfree function is ON	A waveform synchronized with sounds is output
I9-3 (TSW-) - I4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
I9-4 (SPD) - I4-20 (GND)	W - W-B	Speed signal from combination meter	Ignition switch ON, drive wheels turned slowly	Pulse generation
I9-5 (+B) - I4-20 (GND)	L - W-B	Battery	Always	11 to 14 V
I9-6 (MGND) - I4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
I9-7 (MCVD) - I4-20 (GND)	LG - W-B	Microphone AMP power supply	Ignition switch off → ACC	Below 1 V → 5 V
I9-14 (GND) - I4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
I9-16 (ACC) - I4-20 (GND)	GR - W-B	Accessory (ON)	Ignition switch off → ACC	Below 1 V → 11 to 14 V
I8-1 (CSLD) - Body ground*	Shielded - Body ground	Ground	Always	Below 1 V
I8-2 (CDR+) - I4-20 (GND)*	B - W-B	Sound signal (right)	RSE system is playing	Waveform synchronized with sound is output
I8-3 (CDR-) - I4-20 (GND)*	G - W-B	Sound signal (right)	RSE system is playing	Waveform synchronized with sound is output
I8-4 (CDL+) - I4-20 (GND)*	R - W-B	Sound signal (left)	RSE system is playing	Waveform synchronized with sound is output
I8-5 (CDL-) - I4-20 (GND)*	W - W-B	Sound signal (left)	RSE system is playing	Waveform synchronized with sound is output
I8-6 (MUTE) - I4-20 (GND)*	O - W-B	Mute signal	RSE system is playing → changing modes	Above 3.5 V → Below 1 V
I8-9 (TXM+) - I4-20 (GND)*	G-BR	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
I8-10 (TXM-) - I4-20 (GND)*	R-BR	AVC-LAN communication signal	Ignition switch ACC	2 to 3 V
HINT: *: w/ Rear Seat Entertainment System

CHECK RADIO RECEIVER ASSEMBLY (for 8 Speakers)

Fig 2: Identifying Radio Receiver Assembly Connector (For 8 Speakers)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

RADIO RECEIVER ASSEMBLY TERMINAL REFERENCE (FOR 8 SPEAKERS)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I1-1 (FR+) - I1-7 (GND)	LG - W-B	Sound signal (Front right)	Audio system is playing	A waveform synchronized with sounds is output
I1-2 (FL+) - I1-7 (GND)	Y - W-B	Sound signal (Front left)	Audio system is playing	A waveform synchronized with sounds is output
I1-3 (ACC) - I1-7 (GND)	GR - W-B	Accessory (ON)	Ignition switch off → ACC	Below 1 V → 11 to 14 V
I1-4 (B) - I1-7 (GND)	L - W-B	Battery	Always	11 to 14 V
I1-5 (FR-) - I1-7 (GND)	L - W-B	Sound signal (Front right)	Audio system is playing	A waveform synchronized with sounds is output
I1-6 (FL-) - I1-7 (GND)	W - W-B	Sound signal (Front left)	Audio system is playing	A waveform synchronized with sounds is output
I1-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
I1-8 (ANT) - I1-7 (GND)	W - W-B	Power source of antenna	Radio switch ON (AM or FM)	11 to 14 V
I1-10 (ILL+) - I1-7 (GND)	SB - W-B	Illumination signal	Light control switch OFF → TAIL or HEAD	Below 1 V → 11 to 14 V
I2-1 (RR+) - I1-7 (GND)	B - W-B	Sound signal (Rear right)	Audio system is playing	A waveform synchronized with sounds is output
I2-2 (RL+) - I1-7 (GND)	R - W-B	Sound signal (Rear left)	Audio system is playing	A waveform synchronized with sounds is output
I2-3 (RR-) - I1-7 (GND)	Y - W-B	Sound signal (Rear right)	Audio system is playing	A waveform synchronized with sounds is output
I2-5 (ILL-) - I1-7 (GND)	O - W-B	Illumination (rheostat) signal	Light control switch OFF and rheostat switch position medium → TAIL or HEAD	Below 1 V → Pulse generation
I2-6 (RL-) - I1-7 (GND)	W - W-B	Sound signal (Rear left)	Audio system is playing	A waveform synchronized with sounds is output
I3-3 (SPD) - I1-7 (GND)	W - W-B	Speed signal from combination meter	Ignition switch ON, drive wheels turned slowly	Pulse generation
I3-15 (ARI) - I1-7 (GND)	R - W-B	Sound signal (Right)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
I3-16 (ASGN) - I1-7 (GND)	W - W-B	Ground	Always	Below 1 V
I3-17 (ALI) - I1-7 (GND)	B - W-B	Sound signal (Left)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
I3-18 (AUXG) - I1-7 (GND)	Shielded - W-B	Shield ground	Always	Below 1 V
I3-19 (AUXI) - I1-7 (GND)	SB - W-B	External device connection detection signal	External device is connected	Below 1 V

CHECK STEREO COMPONENT AMPLIFIER ASSEMBLY (for 14 Speakers)

Fig 3: Identifying Stereo Component Amplifier Assembly Connector (For 14 Speakers)

STEREO COMPONENT AMPLIFIER ASSEMBLY TERMINAL REFERENCE (FOR 14 SPEAKERS)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
I16-1 (+B) - I16-2 (GND)	R-BR	Battery	Always	11 to 14 V
I16-2 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 V
I16-3 (+B2) - I16-6 (GND2)	R-BR	Battery	Always	11 to 14 V
I16-6 (GND2) - Body ground	BR - Body ground	Ground	Always	Below 1 V
I17-1 (MUTE) - I16-2 (GND)	GR - BR	Mute signal	Audio system is playing	Above 3.5 V
I17-1 (MUTE) - I16-2 (GND)	GR - BR	Mute signal	Audio system is changing mode	Below 1 V
I17-2 (L-) - I16-2 (GND)	B - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I17-3 (L+) - I16-2 (GND)	G - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I17-4 (R-) - I16-2 (GND)	R - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I17-5 (R+) - I16-2 (GND)	W - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I17-6 (SLD) - I16-2 (GND)	Shielded - BR	Shield ground	Always	Below 1 V
I17-7 (TX-) - I16-2 (GND)	P - BR	AVC-LAN communication signal	Ignition switch ON	2 to 3 V
I17-8 (TX+) - I16-2 (GND)	V - BR	AVC-LAN communication signal	Ignition switch ON	2 to 3 V
I17-11 (SPD) - I16-2 (GND)	W - BR	Speed signal from combination meter	Ignition switch ON, drive wheels turned slowly	Pulse generation
I17-12 (ACC) - I16-2 (GND)	GR - BR	Ignition switch ACC	Ignition switch off	Below 1 V
I17-12 (ACC) - I16-2 (GND)	GR - BR	Ignition switch ACC	Ignition switch ACC	11 to 14 V
I17-14 (II1-) - I16-2 (GND)	BR - BR	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
I17-15 (II1+) - I16-2 (GND)	Y - BR	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
I18-1 (WFL+) - I16-2 (GND)	P - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I18-2 (WFR+) - I16-2 (GND)	LG - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I18-3 (CTR+) - I16-2 (GND)	W - BR	Sound Signal (Center)	Audio system playing	A waveform synchronized with sounds is output
I18-4 (WF2+) - I16-2 (GND)	R - BR	Sound Signal (Woofer Box)	Audio system playing	A waveform synchronized with sounds is output
I18-5 (WFL-) - I16-2 (GND)	V - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I18-6 (WFR-) - I16-2 (GND)	L - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I18-7 (SL-) - I16-2 (GND)	W - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I18-8 (SL+) - I16-2 (GND)	Y - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I18-9 (CTR-) - I16-2 (GND)	B - BR	Sound signal (Center)	Audio system is playing	A waveform synchronized with sounds is output
I18-10 (WF2-) - I16-2 (GND)	G - BR	Sound signal (Woofer Box)	Audio system is playing	A waveform synchronized with sounds is output
I19-1 (WF1+) - I16-2 (GND)	O - BR	Sound signal (Woofer Box)	Audio system is playing	A waveform synchronized with sounds is output
I19-2 (SR+) - I16-2 (GND)	B - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I19-3 (FL+) - I16-2 (GND)	P - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I19-4 (RL+) - I16-2 (GND)	Y - BR	Sound Signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I19-5 (RR+) - I16-2 (GND)	R - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I19-6 (WF1-) - I16-2 (GND)	GR - BR	Sound signal (Woofer Box)	Audio system is playing	A waveform synchronized with sounds is output
I19-7 (SR-) - I16-2 (GND)	SB - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I19-8 (FL-) - I16-2 (GND)	V - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I19-9 (FR-) - I16-2 (GND)	L - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I19-10 (FR+) - I16-2 (GND)	LG - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
I19-11 (RL-) - I16-2 (GND)	B - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
I19-12 (RR-) - I16-2 (GND)	W - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output