+
+
−
+
−
−
10
Navigation Unit Inputs and Outputs for Connector C (8P)
Terminal
Number
Wire Color
Terminal Name
Description
Voltage (about)
Symptom
23-90
Navigation System
System Description (cont’d)
1
WHT/RED
B
(
B Power
source)
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. 7 (7.5 A) in the
under-dash fuse/relay box.
2
YEL/RED
ACC
(Accessory)
Power source for
accessories
Battery voltage
at ACC (I)
If open: Display picture goes out (display back light
still on).
NOTE: When re-connected the system will reboot to
‘‘enter code’’ screen.
If short to ground: Blows fuse No. 32 (7.5 A) in the
under-dash fuse/relay box.
4
BLK
GND
(Ground)
Ground for
navigation unit
0 V
If open: No effect on system.
If short to ground: No effect on system.
5
GRN
BACK LT
(Back light)
Reverse signal of
select lever 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 reverse.
Diagnostic screen ‘‘Car Status’’, ‘‘Back’’ = 0.
If short to ground: Blows fuse No. 21 (7.5 A) in the
under-dash fuse/relay box.
6
BLU/WHT
VSP
(Vehicle speed
pulse)
Vehicle speed
pulse signal from
ECM/PCM
Stopped: 10
11 V DC
Average 5 V DC,
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.
7
GRN/RED
DIAG
(Diagnostic
positive)
Service check
signal for
navigation system
5
6 V
If open: No effect on system.
If short to ground: System goes into diagnostic
mode.
8
GRN/YEL
DIAG
(Diagnostic
negative)
Ground for service
check signal
0 V
If open: No effect on system.
If short to ground: No effect on system.
Wire side of female terminals