Terminals Of Ecu

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

NAVIGATION ECU

Fig 1: Identifying Navigation ECU N₂ N₃

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TERMINAL CONDITION SPECIFIED

Terminal No. (Symbols)	Wiring Color	Condition	Specification
N2-1 (VR) - N2-6 (VG)	Y - Shielded	Ignition switch OFF	Below 1 V
N2-2 (R) - N2-6 (VG)	B - Shielded	Navigation display is displayed	Pulse generation *2
N2-3 (B) - N2-6 (VG)	R - Shielded	Navigation display is displayed	Pulse generation *2
N2-5 (TX+)	O	See "Service Check Mode"	-
N2-6 (VG) - Body ground	Shielded - Body ground	Always	Continuity
N2-7 (G) - N2-6 (VG)	W - Shielded	Navigation display is displayed	Pulse generation *2
N2-8 (SYNC) - N2-6 (VG)	G - Shielded	Navigation display is displayed	Pulse generation *1
N2-10 (TX-)	L-W	See "Service Check Mode"	-
N3-1 (AUI+) - N3-17 (GND)	G-W - W-B	Audio system is playing	A waveform synchronized with sounds is output
N3-2 (AUO+) - N3-17 (GND)	P - W-B	Sound quality test	-
N3-5 (SPD) - N3-17 (GND)	V-W - W-B	See "Vehicle Signal Check Mode"	-
N3-9 (+B) - N3-17 (GND)	L-Y - W-B	Always	Below 1 V
N3-10 (AUI-) - N3-17 (GND)	BR - W-B	Audio system is playing	A waveform synchronized with sounds is output
N3-11 (AUO-) - 3-17 (GND)	V - W-B	Sound quality test	-
N3-14 (REV) - N3-17 (GND)	R-B - W-B	See "Vehicle Signal Check Mode"	-
N3-17 (GND) - Body ground	W-B - Body ground	Always	Continuity
N3-18 (ACC) - N3-17 (GND)	GR - W-B	Ignition switch ACC	10 to 14 V

RADIO RECEIVER ASSY

Fig 2: Identifying Radio Receiver R10, R11, R12, R13, R14 R15, R16
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Fig 3: Terminal Condition Specification Chart (1 Of 2)
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Fig 4: Terminal Condition Specification Chart (2 Of 2)
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STEREO COMPONENT AMPLIFIER

Fig 5: Identifying Stereo Component Amplifier S10 & S11
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Fig 6: Terminal Condition & Specification Chart
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*1: Oscilloscope wave

Terminal to be measured: SYNC - GND

Setting for measurement: 500 mV/DIV10- mus/DIV

Condition: Navigation display is displayed.

Fig 7: Waveform Representation Of Navigation Display
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*2: Oscilloscope wave

Terminal to be measured: R, G, B - GND

Setting for measurement: 200 mV/DIV10- mus/DIV

Condition: Navigation map is switched.

Fig 8: Waveform Representation Of Navigation Map Switch
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