1996 ACURA RL KA9 Service Repair Manual

Symptom Troubleshootin g
No pictur e is displaye d
Diagnosti c Test : Navigatio n Syste m Lin k
1 . Chec k th e No . 5 6 (7.5A ) fus e in th e under-hoo d fuse /
rela y bo x an d No . 4 (10A ) fus e in th e under-das h fuse /
relay box , an d reinstal l th e fuse s i f the y are-OK .
Are the fuses OK?
YES—G o to ste p 2 .
NO—Replac e th e fus e an d recheck .
2 . Tur n th e ignitio n switc h t o AC C (I) .
3 . Operat e th e radi o an d liste n t o th e audio .
Can audio be heard?
YES—G o to ste p 4 .
NO—Chec k th e AC C circuit .
4 . Tur n th e ignitio n switc h O N (II) .
5 . Measur e th e voltag e betwee n bod y groun d an d navi -
gatio n uni t connecto r C (8P ) terminal s No . 1 an d No .
2 individually .
Wire sid e o f femal e terminal s
Is there battery voltage?
YES—G o to ste p 6 .
NO—I f th e + B wir e doe s no t hav e voltage , repai r
ope n in th e wir e betwee n th e under-hoo d fus e rela y
bo x an d th e navigatio n unit .
I f th e AC C wir e doe s no t hav e voltage , repai r ope n in
th e wir e betwee n th e under-das h fus e rela y bo x an d
th e navigatio n unit . 6
. Chec k fo r continuit y betwee n navigatio n uni t connec -
to r C (8P ) termina l No . 4 an d bod y ground .
NAVIGATIO N UNI T CONNECTO R C (8P )
Wire sid e o f femal e terminal s
Is there continuity?
YES—G o to ste p 7 .
NO—Repai r ope n i n th e wir e betwee n th e navigatio n
unit an d bod y groun d (G603) .
7 . Tur n th e ignitio n switc h OFF .
8 . Perfor m th e force d startin g o f th e displa y (se e pag e
23-52 )
Is the diagnosis menu of the picture diagnosis dis-
played?
YES—G o int o th e Diagnosti c mod e an d us e th e "Nav i
Syste m Link " diagnosti c (se e pag e 23-40 ) t o chec k
the links .
NO—G o to ste p 9 .
9 . Shiel d th e displa y uni t fro m th e su n wit h you r hand ,
an d chec k tha t th e displa y i s blac k (onl y bac k ligh t i s
ON) .
Can you see the back light?
YES—Replac e th e navigatio n uni t
(see pag e 23-53 ).
NO—Replac e th e displa y uni t (se e pag e 23-53 ).
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Navigation Syste m
Sympto m Troubleshootin g (cont'd )
Picture i s missin g a red/green/blu e colo r o r
tone , o r rollin g pictur e
Diagnosti c Test : Monito r Chec k
NOTE:
• Alway s chec k th e connector s fo r poo r connection s o r
loos e terminals .
• Befor e troubleshooting , ge t th e navigatio n syste m
anti-thef t codes .
• Afte r troubleshooting , ente r th e navigatio n syste m
anti-thef t codes .
1 . G o int o Diagnosti c mod e an d us e "RG B Color "
diagnosti c unde r
Monito r Check (see pag e 23-41 ).
Are the red, green, and blue colored circles
shown?
YES—Th e syste m is OK .
NO—G o t o ste p 2 .
2 . Tur n th e ignitio n switc h t o OFF .
3 . Disconnec t th e navigatio n uni t connecto r A (20P )
an d displa y uni t connecto r B (20P) .
4 . Chec k fo r loos e terminal s a t navigatio n uni t con -
necto r A (20P ) an d displa y uni t connecto r B (20P) .
Are there loose terminals?
YES—Repai r th e terminal .
NO—G o t o ste p 5 . 5
. Chec k fo r continuit y betwee n th e appropriat e termi -
nal s o f navigatio n uni t connecto r A (20P ) t o displa y
uni t connecto r B (20P ) base d o n th e missin g color(s) .
Missin g
colo r
Blue
Gree n
Red
Navigatio n
unit
connecto r A
(20P )
A11
A2
A 1
Displa y uni t
connecto r B
(20P )
B18
B9
B8
Wir e
colo r
YEL
RE D
WH T
NAVIGATIO N UNI T CONNECTO R A (20P )
DISPLA Y UNI T CONNECTO R B (20P )
Wire sid e o f femal e terminal s
Is there continuity?
YES—G o to ste p 6 .
NO—Ther e is a n ope n i n th e circui t betwee n th e dis -
pla y uni t an d th e navigatio n unit . Chec k fo r poo r con -
nection s o r loos e terminal s a t th e displa y an d naviga -
tio n units . I f a poo r connectio n o r loos e termina l i s
found , replac e th e affecte d shielde d harness .
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6. Check for continuity between the appropriate termi-

nals of navigation unit connector A (20P) and display

unit connector B (20P) based on the missing color(s).

Missing Navigation

color unit connector

A
(20P)

Blue A11

Green A2

Red A1
Display unit

connector B

(20P)

B10,
B20

B10,
B20

B10,
B20

NAVIGATION UNIT CONNECTOR A (20P)

Wire side of female terminals

DISPLAY UNIT CONNECTOR B I20PI

Wire side of female terminals

Is there continuity?

YES—There is a short to body ground in the circuit

between the display unit and the navigation unit.

Replace the affected shielded harness.

NO—Replace the navigation unit. If the problem is

still unresolved, replace the display unit.ProCarManuals.com