Acura CSX. Manual — part 645
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Navigation Unit Inputs and Outputs for Connector A (24P)
Navigation Unit Connector A (24P)
Terminal
Number
Wire Color
Terminal Name
Description
Voltage (about)
Symptom
23-291
1
RED
ILL (
)
Ground for
illumination light
With full dash
lights brightness,
0 V
If open: When brightness = Auto, night mode for the
display is inoperative when lights on.
If short to ground: No change to display.
12
BLK
RADIO GND
(Ground)
Ground for display
unit
0 V
If open: No change to display.
If short to ground: No change to display.
13
GRY
ILL (
)
(Illumination
positive)
Parking light on
signal from dash
and console lights
Light on =
battery voltage,
Lights off = 0 V
If open: When brightness = Auto, night mode for the
display is inoperative when lights on.
If short to ground: Blows fuse No. 14 (7.5 A) in
under-dash fuse/relay box.
15
BLU
VSP
(Vehicle speed
pulse)
Vehicle speed
pulse signal from
ECM/PCM
Pulses 0
5 V:
Average 2.5 V,
when moving
If open: No vehicle speed pulses.
Diagnostic screen Car Status, VSP Navi = 0.
If short to ground: No vehicle speed pulses.
Diagnostic screen Car Status, VSP Navi = 0.
24
WHT
B
(
B power
source)
Continuous power
source
Battery voltage
If open: Screen completely off (no backlight visible).
If short to ground: Blows fuse No. 23 (10 A) in the
under-hood fuse/relay box.
Wire side of female terminals
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*13
Navigation Unit Inputs and Outputs for Connector B (24P)
Navigation Unit Connector B (24P)
Terminal
Number
Wire Color
Terminal Name
Description
Voltage
(about)
Symptom
23-292
Navigation System
10
GRY
HFL/NAVI COMM SH
(Shield HFL)
Shield for terminal
No. 11, 12, 23, 24
11
GRN
HFL/NAVI COMM2
(HFL communication 2)
Communication
signal for HFL
HFL icon in Navi System Link changes
between red and green
12
WHT
HFL/NAVI COMM4
(HFL communication 4)
Communication
signal for HFL
Solid red HFL icon in Navi System Link
23
BLK
HFL/NAVI COMM1
(HFL communication 1)
Communication
signal for HFL
HFL icon in Navi System Link changes
between red and green
24
RED
HFL/NAVI COMM3
(HFL communication 3)
Communication
signal for HFL
Solid red HFL icon in Navi System Link
: The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray,
may not match the color of the wire listed on the schematic.
Wire side of female terminals
08/08/21 14:15:46 61SNR030_230_0295
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Navigation Unit Inputs and Outputs for Connector C (8P)
Navigation Unit Connector C (8P)
Terminal
Number
Wire Color
Terminal Name
Description
Voltage (about)
Symptom
23-293
1
WHT
B BACK UP
Continuous power
source
Battery voltage
If open: Display picture goes out (display back light
still on). NOTE: System will reboot to enter code
screen.
If short to ground: Blows fuse No. 23 (10 A) in the
under-dash fuse/relay box.
4
BLK
GND
Ground for
navigation unit
0 V
If open: No effect on system.
If short to ground: No effect on system.
7
BRN
BACK LT
Reverse signal of
select laver from
Multiplex
integrated Control
unit (A/T) or
backup light switch
(M/T)
In reverse,
battery voltage:
Otherwise 0 V
If open: Navigation never sees the reverse signal
and back-up camera does not come on when in
reverse. Diagnostic screen Car Status, Back = 0.
If short to ground: Blows fuse No. 10 (7.5 A) in the
under-dash fuse/relay box.
Wire side of female terminals
08/08/21 14:15:46 61SNR030_230_0296
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Navigation Unit Inputs and Outputs for Connector D (12P)
Navigation Unit Connector D (12P)
Terminal
Number
Wire Color
Terminal Name
Description
Voltage (about)
Symptom
23-294
Navigation System
1
GRN
NAVI GUIDE
Steering wheel
switch output
4
5 V
(navigation TALK
button pressed)
2.5
3 V
(navigation
BACK button
pressed)
If open: Steering wheel navigation TALK, and
navigation BACK switch/buttons do not work.
If short to ground: Steering wheel navigation TALK,
and navigation BACK switch/buttons do not work.
5
YEL
AC SI
A/C input signal
0-battery voltage
pulses
If open: voice control does not work.
If short to ground: Voice control does not work.
6
RED
AC SO
A/C output signal
0-battery voltage
pulses
If open: A/C voice control does not work.
If short to ground: A/C voice control does not work.
7
BRN
MIC GND
Ground for
microphone signal
0 V
If open: No microphone signal shown in
diagnostics: Navi System Link and Functional Set
up Mic Level.
If short to ground: No effect on voice recognition.
8
YEL
MIC SIG
Microphone output
signal positive
4
5 V (with
navigation TALK
button pressed)
If open: No microphone signal shown in diagnostic
screens: Navi System Link and Functional Setup
Mic Level.
If short to ground: No microphone signal shown in
diagnostic screens: Navi System Link and
Functional Setup Mic Level.
9
GRY
MIC SHIELD
Shield for terminal
No. 7, 8
0 V
If open: No effect on voice recognition.
If short to ground: No effect on voice recognition.
12
BLU
AC CK
Time set sync
signal
0-battery voltage
pulses
If open: A/C voice control does not work.
If short to ground: A/C voice control does not work.
: The shielded wires have a heat-shrunk tube insulating the outside of the wire. The color of the insulating tube, typically black or dark gray,
may not match the color of the wire listed on the schematic.
Wire side of female terminals
08/08/21 14:15:46 61SNR030_230_0297
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