Toyota Sequoia (2005). Manual — part 598
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DIDC4–01
I28763
R27
R29
R30
R26
R28
–
DIAGNOSTICS
NAVIGATION SYSTEM
DI–2187
2381
TERMINALS OF ECU
1.
RADIO AND NAVIGATION ASSY
Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specification
ACC (R30–11) –
GND (R30–20)
GR – BR
Accessory (ON)
Ignition switch OFF
→
ACC or ON
Below 1 V
→
10 to 14 V
B (R30–1) – GND (R30–20)
L–Y – BR
Battery
Always
10 to 14 V
GND (R30–20) – Body ground
BR –
Body ground
Ground
Always
Below 1 V
ANT (R30–13) –
GND (R30–20)
B–R – BR
Power source of antenna
Radio switch ON and AM or FM
10 to 14 V
ILL+ (R30–2) – ILL– (R30–12)
G – W–G
Illumination signal
Ignition switch ON
Light control switch OFF
→
TAIL or
ON
Below 1 V
→
10 to 14 V
R+ (R30–8) – GND (R30–20)
W – BR
Sound signal (Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
L+ (R30–9) – GND (R30–20)
B – BR
Sound signal (Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
R– (R30–18) – GND (R30–20)
G – BR
Sound signal (Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
L– (R30–19) – GND (R30–20)
R – BR
Sound signal (Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
SWG (R27–6) – Body ground
BR–W –
Body ground
Steering pad switch
ground
Always
Below 1 V
SW1 (R27–7) – SWG (R27–6)
LG–R – BR–W
Steering pad switch signal
Steering pad switch not operated
→
SEEK+ switch pushed
→
SEEK– switch pushed
→
VOL+ switch pushed
→
VOL– switch pushed
4 V or more
→
Approx. 0.5 V
→
Approx. 0.9 V
→
Approx. 2.0 V
→
Approx. 3.4 V
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DI–2188
–
DIAGNOSTICS
NAVIGATION SYSTEM
2382
SW2 (R27–8) – SWG (R27–6)
GR–R – BR–W
Steering pad switch signal
Steering pad switch not operated
→
MODE switch pushed
4 V or more
→
Below 2.5 V
SPD (R29–3) – GND (R30–20)
G–O – BR
Speed signal from com-
bination meter
See ”Vehicle Signal Check Mode”
–
REV (R29–5) – GND (R30–20)
B–Y – BR
Reverse signal from com-
bination meter
See ”Vehicle Signal Check Mode”
–
MUTE (R28–7) –
GND (R30–20)
R–W – BR
MUTE signal
(From navigation)
Audio system is playing
→
chang-
ing mode
Above 3.5 V
→
Below 1 V
SLD (R30–10) – Body ground
Shielded –
Body ground
Shield ground
Always
Below 1 V
SWG (R27–6) – Body ground
BR–W –
Body ground
Steering pad switch
ground
Always
Below 1 V
ATX+ (R30–5) – GND (R30–20)
V – BR
AVC–LAN
communication signal
Ignition switch ON
2 to 3 V
ATX– (R30–15) –
GND (R30–20)
P – BR
AVC–LAN
communication signal
Ignition switch ON
2 to 3 V
IVO+ (R27–11) –
GND (R30–20)
W – BR
Voice guidance output
signal
Navigation system is voice guid-
ance output
A waveform synchro-
nized with sound is out-
put
IVO– (R27–12) –
GND (R30–20)
B – BR
Voice guidance output
signal
Navigation system is voice guid-
ance output
A waveform synchro-
nized with sound is out-
put
SLD1 (R27–13) – Body ground
Shielded –
Body ground
Shield ground
Always
Below 1 V
PKB (R29–1) – GND (R30–20)
LG–R – BR
Parking brake switch sig-
nal
Parking brake pedal is depress
→
Below 1 V
→
10 to 14 V
(*1) NTSC (R26–1) –
GND (R30–20)
R – BR
Display signal (From mul-
ti–display controller)
Navigation display is ON
Pulse generation
(*1) SGD1 (R26–4) –
Body ground
G – Body ground
Ground
Always
Below 1 V
(*1) SGND (R26–5) –
Body ground
Shielded –
Body ground
Shield ground
Always
Below 1 V
(*1, 2) TX+ (R27–9) –
GND (R30–20)
L – BR
AVC–LAN
communication signal
Ignition switch ON
2 to 3 V
(*1, 2) TX– (R27–10) –
GND (R30–20)
LG – BR
AVC–LAN
communication signal
Ignition switch ON
2 to 3 V
(*1, 2) R–R+ (R27–15) –
GND (R30–20)
W – BR
Sound signal
(Right output)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R–R– (R27–16) –
GND (R30–20)
G – BR
Sound signal
(Right output)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R–L+ (R27–17) –
GND (R30–20)
B – BR
Sound signal (Left output)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1, 2) R–L– (R27–18) –
GND (R30–20)
R – BR
Sound signal (Left output)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
(*1) RSLD (R27–14) –
Body ground
Shielded –
Body ground
Shield ground
Always
Below 1 V
(*1, 2) RMUT (R27–19) –
GND (R30–20)
R–W – BR
MUTE signal (To multi–
display controller)
Audio system is playing
→
chang-
ing mode
Above 3.5 V
→
Below 1 V
(*1) CDR+ (R28–2) –
GND (R30–20)
W – BR
Sound signal (Right input)
Rear seat entertainment system is
playing
A waveform synchro-
nized with sound is out-
put
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I28722
S10
S9
–
DIAGNOSTICS
NAVIGATION SYSTEM
DI–2189
2383
(*1) CDR– (R28–3) –
GND (R30–20)
G – BR
Sound signal (Right input)
Rear seat entertainment system is
playing
A waveform synchro-
nized with sound is out-
put
(*1) CDL+ (R28–4) –
GND (R30–20)
B – BR
Sound signal (Left input)
Rear seat entertainment system is
playing
A waveform synchro-
nized with sound is out-
put
(*1) CDL– (R28–5) –
GND (R30–20)
R – BR
Sound signal (Left input)
Rear seat entertainment system is
playing
A waveform synchro-
nized with sound is out-
put
(*1) CSLD (R28–1) –
Body ground
Shielded –
Body ground
Shield ground
Always
Below 1 V
(*1) MUTE (R28–6) –
GND (R30–20)
R–G – BR
MUTE signal (From multi–
display controller)
Rear seat entertainment system is
playing
→
changing mode
Above 3.5 V
→
Below 1 V
*1: w/ Rear seat entertainment system
*2: w/ Rear seat audio system
2.
STEREO COMPONENT AMPLIFIER ASSY
Symbols (Terminal No.)
Wiring Color
Terminal Description
Condition
Specification
B+ (S9–1) – E (S9–16)
L–W – BR
Battery
Always
10 to 14 V
RL+ (S9–4) – E (S9–16)
B – BR
Sound signal (Rear Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
RR+ (S9–5) – E (S9–16)
R – BR
Sound signal (Rear Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
FL+ (S9–2) – E (S9–16)
P – BR
Sound signal (Front Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
FR+ (S9–3) – E (S9–16)
LG – BR
Sound signal (Front Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
WFL+ (S9–6) – E (S9–16)
L–W – BR
Sound signal (Front Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
WFR+ (S9–7) – E (S9–16)
R – BR
Sound signal (Front Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
B2+ (S9–10) – E (S9–16)
L–W – BR
Battery
Always
10 to 14 V
RL– (S9–13) – E (S9–16)
Y – BR
Sound signal (Rear Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
RR– (S9–14) – E (S9–16)
W – BR
Sound signal (Rear Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
GND (S9–15) – Body ground
BR –
Body ground
Ground
Always
Below 1 V
![](/vehicles/linovind/vere/fry/knto.png)
DI–2190
–
DIAGNOSTICS
NAVIGATION SYSTEM
2384
E (S9–16) – Body ground
BR –
Body ground
Ground
Always
Below 1 V
FL– (S9–11) – E (S9–16)
V – BR
Sound signal (Front Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
FR– (S9–12) – E (S9–16)
L – BR
Sound signal (Front Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
WFL– (S9–17) – E (S9–16)
G – BR
Sound signal (Front Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
WFR– (S9–18) – E (S9–16)
Y – BR
Sound signal (Front Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
MUTE (S10–1) – E (S9–16)
R–W – BR
Mute signal from radio
receiver
Audio system is sounding
→
chang-
ing mode
Above 3.5 V
→
Below 3.5 V
L– (S10–2) – E (S9–16)
R – BR
Sound signal from radio
receiver (Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
L+ (S10–3) – E (S9–16)
B – BR
Sound signal from radio
receiver (Left)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
R– (S10–4) – E (S9–16)
G – BR
Sound signal from radio
receiver (Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
R+ (S10–5) – E (S9–16)
W – BR
Sound signal from radio
receiver (Right)
Audio system is playing
A waveform synchro-
nized with sound is out-
put
SGND (S10–6) – Body ground
Shielded –
Body ground
Ground
Always
Below 1 V
TX– (S10–19) – E (S9–16)
P – BR
AVC–LAN
communication signal
Turn ignition switch to ACC
2 to 3 V
TX+ (S10–20) – E (S9–16)
V – BR
AVC–LAN
communication signal
Turn ignition switch to ACC
2 to 3 V
ACC (S10–12) – E (S9–16)
GR – BR
Accessory (ON)
Turn ignition switch OFF
→
ACC
Below 1 V
→
10 to 14 V
INT– (S10–22) – E (S9–16)
B – BR
Voice guidance signal
Voice guidance
A waveform synchro-
nized with sound is out-
put
INT+ (S10–23) – E (S9–16)
W – BR
Voice guidance signal
Voice guidance
A waveform synchro-
nized with sound is out-
put
3.
MULTI–DISPLAY CONTROLLER ASSY
See page
4.
REAR SEAT AUDIO CONTROLLER
See page
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