Terminals Of Ecu

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

CHECK RADIO RECEIVER (for Separate Type Amplifier System)

Fig 1: Identifying Radio Receiver (For Separate Type Amplifier System) Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
K4-1 (B) - K4-20 (GND)	L - W-B	Battery	Always	11 to 14 V
K4-2 (ILL+) - K4-20 (GND)	SB - W-B	Illumination signal	Light control switch OFF → TAIL	Below 1 V → 11 to 14V
K4-5 (ATX+) - K4-20 (GND)	V - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3V
K4-7 (MUTE) - K4-20 (GND)	GR - W-B	MUTE signal	Audio system is playing → Changing modes	Above 3.5 V → Below 1 V
K4-8 (R+) - K4-20 (GND)	W - W-B	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K4-9 (L+) - K4-20 (GND)	G - W-B	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K4-10(SLD) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
K4-11 (ACC) - K4-20 (GND)	GR - W-B	Accessory (ON)	Ignition switch ACC	10 to 14V
K4-12(ILL-) - K4-20 (GND)	O - W-B	Illumination (rheostat) signal	Light control switch OFF → TAIL	Below 1 V → Pulse generation
K4-15(ATX-) - K4-20 (GND)	P - W-B	AVC-LAN communication signal	Ignition switch ACC	2 to 3V
K4-18(R-) - K4-20 (GND)	R - W-B	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K4-19(L-) - K4-20 (GND)	B - W-B	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K4-20 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
K3-6 (SWG) - K4-20 (GND)	BR - W-B	Steering pad switch ground	Always	Below 1 V
K3-7(SW1) - K4-20 (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
K3-8 (SW2) - K4-20 (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
K3-11 (IVO+) - K4-20 (GND)	Y - W-B	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
K3-12 (IVO-) - K4-20 (GND)	BR - W-B	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
K3-13(SLD1) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
K3-15(ARI) - K4-20 (GND)	R - W-B	Sound signal (Right)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
K3-16(ASGN) - K4-20 (GND)	W - W-B	Ground	Always	Below 1 V
K3-17(ALI) - K4-20 (GND)	B - W-B	Sound signal (Left)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
K3-18(AUXG) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 V
K3-19(AUXI) - K4-20 (GND)	SB - W-B	External device connection detection signal	External device is connected	Below 1 V
K22-5(CDL-) - L51-20 (GND)*	W - W-B	Sound signal (left)	RSE system is playing	Waveform synchronized with sound is output
K22-4(CDL+) - L51-20 (GND)*	R - W-B	Sound signal (left)	RSE system is playing	Waveform synchronized with sound is output
K22-3(CDR-) - L51-20 (GND)*	G - W-B	Sound signal (right)	RSE system is playing	Waveform synchronized with sound is output
K22-2(CDR+) - L51-20 (GND)*	B - W-B	Sound signal (right)	RSE system is playing	Waveform synchronized with sound is output
K22-1 (CSLD) - Body ground*	Shielded - Body ground	Ground	Always	Below 1 V
K22-6(MUTE) - L51-20 (GND)*	O - W-B	Mute signal	RSE system is playing → changing modes	Above 3.5 V → Below 1 V
K22-9 (TXM+) - K3-20 (GND)*	G - BR	AVC-LAN communication signal	Ignition switch ACC	2 to 3V
K22-10 (TXM-) - K3-20 (GND)*	R - BR	AVC-LAN communication signal	Ignition switch ACC	2 to 3V
K9-1 (MIC-) - K4-20 (GND)	Y - W-B	Microphone voice signal	Bluetooth handsfree function is ON	A waveform synchronized with sounds is output
K9-2 (MIC+) - K4-20 (GND)	BR - W-B	Microphone voice signal	Bluetooth handsfree function is ON	A waveform synchronized with sounds is output
K9-3 (TSW-) - K4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
K9-4 (SPD) - K4-20 (GND)	W - W-B	Speed signal from combination meter	Ignition switch ON, drive wheels turned slowly	Pulse generation
K9-5 (+B) - K4-20 (GND)	L - W-B	Battery	Always	11 to 14 V
K9-6 (MGND) - K4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
K9-7 (MCVD) - K4-20 (GND)	LG - W-B	Microphone AMP power supply	Ignition switch OFF → ACC	Below 1 V → 5 V
K9-14(GND) - K4-20 (GND)	W-B - W-B	Ground	Always	Below 1 V
K9-16(ACC) - K4-20 (GND)	GR - W-B	Accessory (ON)	Ignition switch OFF → ACC	Below 1 V → 11 to 14 V
HINT: *: w/ Rear Seat Entertainment System

CHECK RADIO RECEIVER (for Built-in Type Amplifier System)

Fig 2: Identifying Radio Receiver (For Built-in Type Amplifier System) Connectors Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
K1-1 (FR+) - K1-7(GND)	LG - W-B	Sound signal (Front right)	Audio system is playing	A waveform synchronized with sounds is output
K1-2(FL+) - K1-7(GND)	Y - W-B	Sound signal (Front left)	Audio system is playing	A waveform synchronized with sounds is output
K1-3(ACC) - K1-7(GND)	GR - W-B	Accessory (ON)	Ignition switch OFF → ACC	Below 1 V → 11 to 14 V
K1-4(B) - K1-7(GND)	L - W-B	Battery	Always	11 to 14 V
K1-5(FR-) - K1-7(GND)	L - W-B	Sound signal (Front right)	Audio system is playing	A waveform synchronized with sounds is output
K1-6(FL-) - K1-7(GND)	W - W-B	Sound signal (Front left)	Audio system is playing	A waveform synchronized with sounds is output
K1-7 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 V
K1-10(ILL+) - K1-7(GND)	SB - W-B	Illumination signal	Light control switch OFF → TAIL or HEAD	Below 1 V → 11 to 14 V
K2-1 (RR+) - K1-7(GND)	R - W-B	Sound signal (Rear right)	Audio system is playing	A waveform synchronized with sounds is output
K2-2(RL+) - K1-7(GND)	Y - W-B	Sound signal (Rear left)	Audio system is playing	A waveform synchronized with sounds is output
K2-3(RR-) - K1-7(GND)	W - W-B	Sound signal (Rear right)	Audio system is playing	A waveform synchronized with sounds is output
K2-5(ILL-) - K1-7(GND)	O - W-B	Illumination (rheostat) signal	Light control switch OFF → TAIL or HEAD	Below 1 V → Pulse generation
K2-6(RL-) - K1-7(GND)	B - W-B	Sound signal (Rear left)	Audio system is playing	A waveform synchronized with sounds is output
K3-3(SPD) - K1-7(GND)	W - W-B	Speed signal from combination meter	Ignition switch ON, drive wheels turned slowly	Pulse generation
K3-15(ARI) - K1-7(GND)	R - W-B	Sound signal (Right)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
K3-16(ASGN) - K1-7 (GND)	W - Body ground	Ground	Always	Below 1 V
K3-17(ALI) - K1-7(GND)	B - W-B	Sound signal (Left)	External device is playing (When stereo jack is used)	A waveform synchronized with sounds is output
K3-18(AUXG) - K1-7 (GND)	Shielded - Body ground	Shield ground	Always	Below 1 V
K3-19(AUXI) - K1-7 (GND)	SB - W-B	External device connection detection signal	External device is connected	Below 1 V

CHECK STEREO COMPONENT AMPLIFIER

Fig 3: Identifying Stereo Component Amplifier Connectors Terminals

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
K16-1 (+B) - K17-6(GND)	R - BR	Battery	Always	11 to 14 V
K17-4(CTR+) - K17-6 (GND)	W - BR	Sound Signal (Center)	Audio system playing	A waveform synchronized with sounds is output
K16-3(RL+) - K17-6 (GND)	Y - BR	Sound Signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K16-10(RR+) - K17-6 (GND)	R - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K16-8(FL+) - K17-6 (GND)	P - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K16-2(FR+) - K17-6 (GND)	LG - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K17-2(WFL+) - K17-6 (GND)	P - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K17-9(WFR+) - K17-6 (GND)	LG - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K16-5(+B2) - K17-6 (GND)	R - BR	Battery	Always	11 to 14 V
K17-10(CTR-) - K17-6 (GND)	B - BR	Sound signal (Center)	Audio system is playing	A waveform synchronized with sounds is output
K16-9(RL-) - K17-6 (GND)	B - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K16-4(RR-) - K17-6 (GND)	W - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K17-7(GND2) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
K17-6 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
K15-11 (SPD) - K17-6 (GND)	W - BR	Speed signal from combination meter	See "vehicle signal check mode"	-
K16-7(FL-) - K17-6(GND)	V - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K16-6(FR-) - K17-6 (GND)	L - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K17-1 (WFL-) - K17-6 (GND)	V - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K17-3(WFR-) - K17-6 (GND)	L - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K15-1 (MUTE) -K17-6 (GND)	GR - BR	Mute signal	Audio system is playing	Above 3.5 V
K15-1 (MUTE) -K17-6 (GND)	GR - BR	Mute signal	Audio system is changing mode	Below 1 V
K15-2(L-) - K17-6(GND)	B - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K15-3(L+) - K17-6(GND)	G - BR	Sound signal (Left)	Audio system is playing	A waveform synchronized with sounds is output
K15-4(R-) - K17-6(GND)	R - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K15-5(R+) - K17-6(GND)	W - BR	Sound signal (Right)	Audio system is playing	A waveform synchronized with sounds is output
K15-6(SLD) - K17-6 (GND)	Shielded - Body ground	Shield ground	Always	Below 1 V
K15-7(TX-) - K17-6 (GND)	P - BR	AVC-LAN communication signal	Ignition switch ON	2 to 3V
K15-8(TX+) - K17-6 (GND)	V - BR	AVC-LAN communication signal	Ignition switch ON	2 to 3 V
K15-12(ACC) - K17-6 (GND)	GR - BR	Ignition switch ACC	Ignition switch OFF	Below 1 V
K15-12(ACC) - K17-6 (GND)	GR - BR	Ignition switch ACC	Ignition switch ACC	11 to 14 V
K17-5(WF1+) - K17-6 (GND)	O - BR	Sound signal (Woofer Box)	Audio system is playing	A waveform synchronized with sounds is output
K17-12(WF1-) - K17-6 (GND)	GR - BR	Sound signal (Woofer Box)	Audio system is playing	A waveform synchronized with sounds is output
K15-22 (II-) - K17-6 (GND)	BR - BR	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output
K15-23 (II+) - K17-6 (GND)	Y - BR	Voice signal	"Bluetooth" handsfree voice signal is playing	A waveform synchronized with sounds is output