Toyota Sequoia (2005). Manual — part 564
DIDAL–01
I28334
R24
–
DIAGNOSTICS
REAR SEAT AUDIO SYSTEM
DI–2051
2245
TERMINALS OF ECU
1.
REAR SEAT AUDIO CONTROLLER
Terminals No. (Symbols)
Wiring Color
Terminal
Description
Condition
Specified value
R24–1 – Body ground
(SGN1 – Body ground)
Shielded –
Body ground
Ground
Always
Below 1 V
R24–2 – R24–17
(HP1L – GND)
BR – LG
Sound signal
(Output)
RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24–3 – R24–17
(HP1R – GND)
BR – LG
Sound signal
(Output)
RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24–6 – R24–17
(R–L– – GND)
W – LG
Sound signal
(Input)
RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24–7 – R24–17
(R–L+ – GND)
W – LG
Sound signal
(Input)
RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24–8 – R24–17
(R–R– – GND)
W – LG
Sound signal
(Input)
RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24–9 – R24–17
(R–R+ – GND)
W – LG
Sound signal
(Input)
RSA system is sounding
A waveform syn-
chronized with
sounds is output
R24–10 – Body ground
(SG1 – Body ground)
Shielded –
Body ground
Ground
Always
Below 1 V
R24–11 – R24–17
(RMUT – GND)
LG – LG
Mute signal
Audio system is playing
→
Changing mode
Above 3.5 V
→
Below 1 V
R24–12 – R24–17
(+B – GND)
LG – LG
Battery
Always
10 to 14 V
R24–13 – Body ground
(SGN2 – Body ground)
Shielded –
Body ground
Ground
Always
Below 1 V
R24–14 – R24–17
(HP2L – GND)
BR – LG
Sound signal
(Output)
RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24–15 – R24–17
(HP2R – GND)
BR – LG
Sound signal
(Output)
RSA system is sounding (Headphone)
A waveform syn-
chronized with
sounds is output
R24–17 – Body ground
(GND – Body ground)
LG –
Body ground
Ground
Always
Below 1
Ω
I28323
H10
H11
Headphone Terminal LH
Headphone Terminal RH
DI–2052
–
DIAGNOSTICS
REAR SEAT AUDIO SYSTEM
2246
R24–22 –R24–17 (TX+ –
GND)
LG – LG
AVC–LAN
communication
signal
Ignition switch ON
2 to 3 V
R24–23 –R24–17 (TX– –
GND)
LG – LG
AVC–LAN
communication
signal
Ignition switch ON
2 to 3 V
R24–24 – R24–17
(ACC – GND)
LG – LG
Ignition (ACC)
Ignition switch ON
10 to 14 V
2.
HEADPHONE TERMINAL
Terminal No. (Symbols)
Wiring Color
Terminal
Description
Condition
Specified value
H10–1 – H10–3
(HPR – SGND)
BR – Shielded
Sound signal
(Input)
External device system sounding
(At that time of headphone terminal use)
A waveform syn-
chronized with
sound is output
H10–2 – H10–3
(HPL – SGND)
BR – Shielded
Sound signal
(Input)
External device system sounding
(At that time of headphone terminal use)
A waveform syn-
chronized with
sound is output
H10–3 – Body ground
(SGND – Body ground)
Shielded – Body
ground
Ground
Always
Below 1 V
H11–1 – H11–3
(HPR – SGND)
BR – Shielded
Sound signal
(Input)
External device system sounding
(At that time of headphone terminal use)
A waveform syn-
chronized with
sound is output
H11–2 – H11–3
(HPL – SGND)
BR – Shielded
Sound signal
(Input)
External device system sounding
(At that time of headphone terminal use)
A waveform syn-
chronized with
sound is output
H11–3 – Body ground
(SGND – Body ground)
Shielded – Body
ground
Ground
Always
Below 1 V
DIDAH–01
I28317
Switch Assy:
–
DIAGNOSTICS
REAR SEAT AUDIO SYSTEM
DI–2053
2247
DTC CHECK / CLEAR
1.
DIAGNOSIS CHECK
HINT:
RSA system inspects the devices consisting of Sub AVC–LAN
on the rear seat audio controller assy.
(a)
Starting Main AVC–LAN (See page
).
HINT:
As starting Main AVC–LAN to operate the diagnosis
mode, Sub AVC–LAN also automatically enters the diag-
nosis mode. Perform the diagnosis mode operation on
the rear seat audio controller assy.
Use a switch assy to operate diagnosis mode.
(b)
Service Check Screen
Reference
In the service check mode, the system check and
the diagnosis memory check are performed, and
the check results are displayed in ascending order
of the device codes (physical address).
Terms
Meaning
Component code
(Physical address)
Three–digit code (In hexadecimal) given to each device
comprising AVC–LAN. Corresponding to its function, individ-
ual symbol is provided.
Logical address
Two–digit code (In hexadecimal) given to each function and
device unit in each device comprising AVC–LAN.
(c)
Finishing Diagnosis Mode (See page
,
(d)
Element Check Mode
After the diagnosis start–up, the system enters the ele-
ment check mode. Check that the all elements come on.
DI–2054
–
DIAGNOSTICS
REAR SEAT AUDIO SYSTEM
2248
(e)
Service Check Mode Result Display (for checking the cur-
rent and the past system conditions)
(1)
Press the ”TUNE/TRACK UP” switch to see the
check result of each device.
(2)
Check result display.
Display
Original Language
Meaning
Action to be taken
good
Good (normal)
No DTC is detected in both ”System Check Mode” and
”Diagnosis Memory Mode”.
–
NCON
No connection
The system recognized the component when it was regis-
tered, but the component gives no response to the ”Diagno-
sis Mode ON Request”.
Check the power source cir-
cuit and the communication
circuit of the device indi-
cated by the device code
(physical address).
ECHN
Exchange
One or more DTC for ”Exchange” is detected in either ”Sys-
tem Check Mode” or ”Diagnosis Memory Mode”.
Go to the detailed informa-
tion mode to check the
trouble area by referring to
the DTC list.
CHEC
Check
When no DTC is detected for ”Exchange”, one or more DTC
for ”Check” is detected in either ”System Check Mode” or
”Diagnosis Memory Mode”.
Go to the detailed informa-
tion mode to check the
trouble area referring to the
DTC list.
I28309
The illustration shows the case that the system has 2 devices with codes 190 and 360, and the device (code
360) has a trouble.
The check result is displayed in ascending order of device code. The device code is displayed first, and then
the check result.
P–––indicates physical address
190–––physical address
good–––”The component is normal”.
P–––indicates physical address
360–––physical address
CHEC–––”Check needed”.
: TUNE/TRACK UP
: TUNE/TRACK DOWN
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