Toyota Tundra Service Manual: Terminals Of Ecu

Toyota Tundra Service Manual / Audio, Visual, Telematics / Audio / Video / Audio And Visual System / Terminals Of Ecu

TERMINALS OF ECU

1. RADIO AND DISPLAY RECEIVER ASSEMBLY

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J137-1 (FR+) - J137-7 (GND1)	LA-LG - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J137-2 (FL+) - J137-7 (GND1)	LA-P - BR	Sound signal (Front left)	Audio system playing	A waveform synchronized with sound is output
J137-3 (ACC1) - J137-7 (GND1)	GR - BR	Power source (ACC)	Ignition switch off	Below 1 V
J137-3 (ACC1) - J137-7 (GND1)	GR - BR	Power source (ACC)	Ignition switch ACC	11 to 14 V
J137-4 (+B1) - J137-7 (GND1)	LA-SB - BR	Power source (+B)	Always	11 to 14 V
J137-5 (FR-) - J137-7 (GND1)	LA-L - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J137-6 (FL-) - J137-7 (GND1)	LA-V - BR	Sound signal (Front left)	Audio system playing	A waveform synchronized with sound is output
J137-7 (GND1) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
J137-9 (AMP) - J137-7 (GND1)*1	G - BR	Power source of stereo component amplifier	Audio system playing	11 to 14 V
J137-10 (ILL+) - J137-7 (GND1)	P - BR	Illumination signal	Ignition switch off	Below 1 V
J137-10 (ILL+) - J137-7 (GND1)	P - BR	Illumination signal	Light control switch in tail or head position	11 to 14 V
J138-1 (RR+) - J137-7 (GND1)*2	LA-R - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J138-2 (RL+) - J137-7 (GND1)*2	LA-B - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output
J138-3 (RR-) - J137-7 (GND1)*2	LA-W - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J138-5 (ILL-) - J137-7 (GND1)	BE - BR	Illumination signal	Headlight dimmer switch assembly off	Below 1 V
J138-5 (ILL-) - J137-7 (GND1)	BE - BR	Illumination signal	Headlight dimmer switch assembly in tail or head position	Pulse generation
J138-6 (RL-) - J137-7 (GND1)*2	LA-Y - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output
J139-1 (IG) - J137-7 (GND1)	BE - BR	Power source (IG)	Ignition switch off	Below 1 V
J139-1 (IG) - J137-7 (GND1)	BE - BR	Power source (IG)	Ignition switch ON	11 to 14
J139-2 (REV) - J137-7 (GND1)	Y - BR	Reverse signal	See "Vehicle Signal Check Mode" in Operation Check (See page )	-
J139-4 (MACC) - J137-7 (GND1)	L - BR	Microphone power supply	Ignition switch off	Below 1 V
J139-4 (MACC) - J137-7 (GND1)	L - BR	Microphone power supply	Ignition switch ACC	4 to 6 V
J139-5 (MIN+) - J137-7 (GND1)	B - BR	Microphone voice signal	See "Check Microphone" in Operation Check (See page )	-
J139-6 (SNS2) - J137-7 (GND1)	LG - BR	Microphone connection detection signal	Always	Below 1 V
J139-9 (CANH)	BE	CAN communication signal	-	-
J139-10 (CANL)	W	CAN communication signal	-	-
J139-11 (AGND) - Body ground	Shielded - Body ground	Shield ground	Always	Below 1 Ω
J139-15 (PKB) - J137-7 (GND1)	R - BR	Parking Brake signal	See "Vehicle Signal Check Mode" in Operation Check (See page )	-
J139-17 (SPD) - J137-7 (GND1)	LG - BR	Vehicle speed signal from combination meter assembly	See "Vehicle Signal Check Mode" in Operation Check (See page )	-
J139-18 (SGND) - J137-7 (GND1)	Shielded - BR	Shield ground	Always	Below 1 Ω
J139-19 (MIN-) - Body ground	Y - Body ground	Microphone voice signal	See "Check Microphone" in Operation Check (See page )	-
J139-21 (SW1) - J139-23 (SWG)	BE - L	Steering pad switch signal	No switch pushed	2.97 to 3.56 V
			Up switch pushed	0.27 to 0.35 V
			Down switch pushed	0.86 to 1.03 V
			Volume+ switch pushed	1.51 to 1.79 V
			Volume- switch pushed	2.22 to 2.66 V
J139-22 (SW2) - J139-23 (SWG)	GR - L	Steering pad switch signal	No switch pushed	2.97 to 3.56 V
			MODE/HOLD switch pushed	0.27 to 0.35 V
			On hook switch pushed	0.86 to 1.03 V
			Off hook switch pushed	1.51 to 1.79 V
			Voice switch pushed	2.22 to 2.66 V
J139-23 (SWG) - Body ground	L - Body ground	Steering pad switch signal	Always	Below 1 V
J139-25 (ADPG) - J137-7 (GND1)	SB - BR	External device connection detection signal	External device connected	Below 1 V
J139-25 (ADPG) - J137-7 (GND1)	SB - BR	External device connection detection signal	External device not connected	2.1 to 3 V
J139-26 (VAR+) - J139-27 (VA-)	B - Y	Sound signal (Right)	External device playing (When stereo jack used)	A waveform synchronized with sound is output
J139-27 (VA-) - J137-7 (GND1)	Y - BR	Sound signal ground	Always	Below 1 Ω
J139-28 (VAL+) - J139-27 (VA-)	L - Y	Sound signal (Left)	External device playing (When stereo jack used)	A waveform synchronized with sound is output
J140-3 (CNH1)	Y	Local bus communication signal	-	-
J140-4 (CNL1)	W	Local bus communication signal	-	-
L2-3 (ACC2) - J137-7 (GND1)*3	Y - BR	Power source (ACC)	Ignition switch off	Below 1 V
L2-3 (ACC2) - J137-7 (GND1)*3	Y - BR	Power source (ACC)	Ignition switch ACC	11 to 14 V
L2-4 (+B2) - J137-7 (GND1)*3	R - BR	Power source (+B)	Always	11 to 14 V
L2-8 (GND2) - Body ground*3	B - Body ground	Ground	Always	Below 1 Ω
J122-1 (USV1)	#	Power source	-	-
J122-2 (US1-)	#	Data signal	-	-
J122-3 (US1+)	#	Data signal	-	-
J122-4 (USD1)	#	Ground	-	-
J122-5 (USG1)	Shielded	Shield ground	-	-
K5-1 (USV4)*3	#	Power source	-	-
K5-2 (US4-)*3	#	Data signal	-	-
K5-3 (US4+)*3	#	Data signal	-	-
K5-4 (UGD4)*3	#	Ground	-	-
K5-5 (USG4)*3	Shielded	Shield ground	-	-
K6-1 (LV)*3	#	LVDS communication signal	-	-
J155-1	#	-	-	-
J155-2 - J137-7 (GND1)	# - BR	Power source of antenna	Ignition switch ACC Radio switch on and AM or FM selected	11 to 14 V
J155-3 (MAIN)	#	-	-	-

#: There is not wire color information.
*1: for 7 or 9 Speakers
*2: except 4 Speakers
*3: w/ SDARS System

2. STEREO COMPONENT TUNER ASSEMBLY (w/ SDARS System)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
L3-3 (ACC2) - L3-8 (GND2)	Y - B	Power source (ACC)	Ignition switch off	Below 1 V
L3-3 (ACC2) - L3-8 (GND2)	Y - B	Power source (ACC)	Ignition switch ACC	11 to 14 V
L3-4 (+B2) - L3-8 (GND2)	R - B	Power source (+B)	Always	11 to 14 V
L3-8 (GND2) - Body ground	B - Body ground	Ground	Always	Below 1 Ω
K2-1 (USV4)	#	Power source	-	-
K2-2 (US4-)	#	Data signal	-	-
K2-3 (US4+)	#	Data signal	-	-
K2-4 (UGD4)	#	Ground	-	-
K2-5 (USG4)	Shielded	Shield ground	-	-
K4-1 (LV)	#	LVDS communication signal	-	-

#: There is not wire color information.

3. STEREO COMPONENT AMPLIFIER ASSEMBLY (for 7 or 9 Speakers)

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
J144-1 (R+) - J144-7 (GND)	LG - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J144-2 (L+) - J144-7 (GND)	V - BR	Sound signal (Front left)	Audio system changing mode	A waveform synchronized with sound is output
J144-3 (ACC) - J144-7 (GND)	LG - BR	Power source (ACC)	Ignition switch off	Below 1 V
J144-3 (ACC) - J144-7 (GND)	LG - BR	Power source (ACC)	Ignition switch ACC	11 to 14 V
J144-4 (+B) - J144-7 (GND)	R - BR	Power source (+B)	Always	11 to 14 V
J144-5 (R-) - J144-7 (GND)	L - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J144-6 (L-) - J144-7 (GND)	P - BR	Sound signal (Front left)	Audio system playing	A waveform synchronized with sound is output
J144-7 (GND) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω
J144-9 (AMP) - Body ground	G - Body ground	Power source of stereo component amplifier	Audio system playing	11 to 14 V
J145-1 (FL+) - J144-7 (GND)	P - BR	Sound signal (Front left)	Audio system playing	A waveform synchronized with sound is output
J145-2 (FR+) - J144-7 (GND)	LG - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J145-3 (RL+) - J144-7 (GND)	B - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output
J145-4 (WFR+) - J144-7 (GND)	R - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J145-5 (WFL+) - J144-7 (GND)	BE - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output
J145-6 (FL-) - J144-7 (GND)	V - BR	Sound signal (Front left)	Audio system playing	A waveform synchronized with sound is output
J145-7 (FR-) - J144-7 (GND)	L - BR	Sound signal (Front right)	Audio system playing	A waveform synchronized with sound is output
J145-8 (RL-) - J144-7 (GND)	Y - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output
J145-9 (RR+) - J144-7 (GND)	R - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J145-10 (RR-) - J144-7 (GND)	W - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J145-11 (WFR-) - J144-7 (GND)	G - BR	Sound signal (Rear right)	Audio system playing	A waveform synchronized with sound is output
J145-12 (WFL-) - J144-7 (GND)	BR - BR	Sound signal (Rear left)	Audio system playing	A waveform synchronized with sound is output

System Diagram

Touch Panel Switch does not Function

See More:

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