ACURA RL KA9 1996 Service Repair Manual

+

BODY

Communication Line Test

1. Continuity Test

Check for continuity according to the table.

• If there is continuity, go to step 2.

• If there is no continuity, check for an open in the wire.

2. Voltage Test

A. Turn the ignition switch ON (II).

B. Check for voltage between communication line and ground:

The voltage should match the following table.

• If the voltage is too high:

A. Check for short to another wire.

B. Check for poor contact at the connector on the receiver side unit.

C. Faulty circuit in the receiver side unit.

• If the voltage is too low:

A. Check for short to ground or to another wire.

B. Check for poor contact at the connector on the transmit side unit.

C. Faulty circuit in the transmitter side unit.

* If any control units appears to be faulty, select one control unit, substitute a known-good control unit, then recheck. If the

system works properly, the original control unit is faulty; replace it. If there is still a malfunction, a substitute the known-

good control unit for another control unit, then recheck. If the system works properly, that control unit is faulty; replace

it.ProCarManuals.com

Wake-up Function Test

Description:

• When the ignition switch is turned ON (II), all of the multiplex control units wake up at the same time. In this case, the

wake up lines and communication lines are not involved in the wake up function.

• When a switch related to the multiplex control unit (door) is operated:

First, the door multiplex control unit wakes up, then the control unit starts to communicate to the driver's control unit.

By this communication, the driver's control unit wakes up. The driver's control unit wakes the passenger's control unit

up by the wake up line, and all the control units start to function.

• When a switch related to the multiplex control unit (driver's or passenger's) is operated:

The control unit related to the operated switch wakes up, then the control unit wakes up the other unit. (In this case, the

door control unit does not wake up.)ProCarManuals.com

Multiplex Control System

Wake-up Function Test (cont'd)

Related Switch (Input):

The switches and input signals that can wake up the multiplex control unit are shown below;

Related Switch (Input) Table:

*No. 17 (20 A): '96 - 97 models

No. 17 (7.5 A): '98 - 01 modelsProCarManuals.com

Confirming the Function

1. Shifting to the sleep mode:

1) Turn the ignition switch OFF.

2) Cancel the key-off operation timer in power window system by opening and closing one of the front doors.

3) Make sure that the trunk is closed, and exterior lights are off.

4) If you do not operate the switches related to the multiplex control units more than one minute after meeting the

above conditions, the system function shifts to the sleep mode.

(All of the switches must be turned OFF except door lock knob switches, ignition key switch, audio switch, and hood

switch.)

2. Confirming the sleep mode:

1) Check for voltage between the wake up line (PNK/BLU wire between driver's and passenger's control unit).

There should be no voltage with the sleep mode OFF.

There should be battery voltage with the sleep mode ON.

2) Check for voltage between each communication line and body ground while shifting to the sleep mode. There

should be no voltage.

3) Check the parasitic draw at the battery while shifting to the sleep mode. The ampere should change from 100 mA to

less than 100 mA.

3. Confirming the wake up mode:

After confirming the sleep mode, turn the related switch (see previous table) ON, and wake up each control unit. If all of

the operations works properly, the wake up mode is OK.

(If any of the control units are faulty and cannot wake up, several parts of the system will not work at the same time.)
Multiplex Control SystemProCarManuals.com

Faulty Wake-U p Lin e Symptom s
Open in th e line :
Mos t o f th e system s d o no t operat e becaus e on e o f th e contro l unit s canno t wak e u p th e othe r contro l units . Bu t th e
contro l uni t tha t i s no t awak e ca n wak e u p b y operatin g a switc h relate d to th e contro l unit .
Al l o f th e contro l unit s wak e u p b y turnin g th e ignitio n switc h O N (II) .
Shor t i n th e line :
• I f th e lin e i s shorte d t o bod y ground :
Th e contro l unit s (driver' s an d passenger's ) canno t wak e u p excep t wit h th e ignitio n switc h O N an d th e wak e u p
signa l fro m th e doo r unit .
Th e contro l uni t (driver's ) ca n wak e u p b y a switc h operatio n relate d t o th e contro l uni t (door) , bu t th e contro l uni t
(passenger's ) canno t wak e u p b y a switc h operation .
All o f th e contro l unit s wak e u p b y turnin g th e ignitio n switc h O N (II) .
• I f th e lin e i s shorte d t o a batter y voltag e (+ ) line :
Mos t o f th e system s d o no t operat e becaus e on e o f th e contro l unit s canno t wak e u p th e othe r contro l units .
Possibl e a blow n fus e o r a fault y transisto r i n th e contro l unit .
Th e contro l uni t ca n wak e u p b y a relate d switc h operation , bu t th e othe r contro l unit s canno t wak e up .
Th e contro l uni t (driver's ) ca n wak e u p b y a switc h operatio n relate d t o th e contro l uni t (door) , bu t th e contro l uni t
(passenger's ) canno t wak e u p b y a switc h operation .
All o f th e contro l unit s wak e u p b y turnin g th e ignitio n switc h O N (II) .
Chec k th e Wake-U p Functio n
Check th e wake-u p lines :
Chec k fo r continuit y o f eac h line . Ther e shoul d b e continuity .
I f ther e i s n o continuity , th e lin e i s open .
If ther e i s continuity , g o t o nex t step .
Chec k fo r voltag e betwee n eac h contro l unit s wit h th e wake-u p line s connected . Ther e shoul d b e n o voltag e in th e wake -
u p mode , an d ther e shoul d b e batter y voltag e in th e slee p mode .
I f th e voltage s ar e no t specified , disconnec t th e wake-u p lin e connecto r o f on e contro l unit , an d recheck . The n connec t it ,
an d disconnec t th e wak e u p lin e connecto r o f anothe r contro l unit , an d recheck .
I f th e voltag e ar e no t specifie d o n bot h side s o f th e line , th e wake-u p lin e is shorte d t o anothe r wir e o r bod y ground .
If th e voltage s ar e no t specifie d o n on e sid e o f th e line , inspec t th e connecto r an d socke t terminal s t o b e sur e the y ar e
al l makin g goo d contact . I f th e terminal s ar e OK , th e possibl e caus e is a disconnecte d wake-u p lin e in th e contro l unit .
ProCarManuals.com

Multiplex Contro l Syste m
Self-diagnosi s Functio n (Mod e 2 )
Fro m mod e 1 , disconnec t th e SC S servic e connecto r fro m th e multiple x contro l inspectio n connecto r fo r 5 to 1 0
seconds , the n reconnec t th e SC S servic e connecto r again , an d th e functio n goe s fro m mod e 1 to mod e 2 .
T o cance l mod e 2 , disconnec t th e SC S servic e connecto r fro m th e multiple x contro l inspectio n connecto r fo r mor e tha n 1 0
second s o r tur n th e ignitio n switc h OFF .
1 . Operat e th e switche s a s show n belo w in mod e 2 .
2 . I f th e relate d circui t lin e o f th e switc h i s OK , th e functio n indicate s thi s b y th e ignitio n ke y ligh t blinkin g onc e an d th e
beepe r soundin g once .
NOTE : I f th e lin e is faulty , ther e shoul d b e n o indication . Refe r t o th e test s fo r eac h system .
Objec t Inpu t Table :
Mod
e 2 :
Hoo d switc h (OPEN )
Trun k latc h switc h (OPEN )
Radi o securit y inpu t
Trun k opene r mai n switc h
Fron t passenger' s doo r switc h
(OPEN )
Front passenger' s ke y cylinde r switc h
(LOCK/UNLOCK )
Front passenger' s doo r loc k switc h
(LOCK/UNLOCK )
Front passenger' s doo r loc k kno b
switc h (UNLOCK )
Righ t rea r doo r switc h (OPEN )
Righ t rea r doo r loc k kno b switc h
(UNLOCK )
Keyless transmitte r
(LOC K button )
(UNLOC K button )
(TRUN K button )
(PANI C button )
Rea r windo w defogge r switc h
Engin e oi l pressur e switc h
Multiple x Contro l Uni t (Passenger's )Multiplex Contro l Uni t (Driver's )
Combinatio n ligh t switc h (ON )
Fron t fo g ligh t switc h (ON )
Das h light s brightnes s controlle r
Lef t rea r doo r switc h (OPEN )
Lef t rea r doo r loc k kno b switc h
(UNLOCK )
Trunk ke y cylinde r switc h (OPEN )
Driver' s sea t bel t switc h
(UNBUCKLED )
Windshield wiper/washe r switc h
(Excep t MIS T switch )
Brak e switc h (ON )
Vehicl e spee d senso r (VSS )
Parkin g brak e switc h (ON )
Transmissio n rang e switc h
Multiple x Contro l Uni t (Door )
Driver' s doo r switc h (OPEN )
Driver' s doo r ke y cylinde r switc h
(LOCK/UNLOCK )
Driver's doo r loc k switc h
(LOCK/UNLOCK )
Driver's doo r loc k kno b switc h
(LOCK/UNLOCK )
Trunk opene r switc h (PUSH )
Powe r windo w maste r switc h
(Excep t driver' s switch )
ProCarManuals.com

Integrated Contro l
Ignition Ke y Ligh t Replacemen t
1. Remove the dashboard lower cover (see
section 20 ).
2 . Remov e th e colum n cover s (se e sectio n 17 ).
3 . Tur n th e bul b socke t 45 ° counterclockwis e t o remov e
it fro m th e ke y ligh t housing .
BULB (1. 4 W )
KE Y LIGH THOUSIN G
BULBSOCKE T
ProCarManuals.com

Dash Light s Brightnes s Contro l
Controlle r Test/Replacemen t
1. Remov e th e driver' s switc h pane l (se e sectio n 20 ).
2 . Measur e resistanc e betwee n th e No . 3 an d No . 4 ter -
minal s whil e rotatin g th e adjustin g dial . Resistanc e
shoul d var y fro m 0 t o 10,00 0 ohm s a s th e dia l i s
rotated .
DRIVER' S SWITC HPANEL
BULB(0.84 W)
DAS H LIGHT S
BRIGHTNES S
CONTROLLE R
3. Tur n th e CANCE L switc h of f b y rotatin g th e adjustin g
beyon d it s en d positio n (unti l i f clicks) . Ther e shoul d
b e n o continuit y betwee n th e No . 2 an d No . 6 termi -
nals.
NOTE : Th e cance l switc h is close d wit h th e adjustin g
dia l betwee n th e minimu m an d maximu m positions .
4 . I f necessary , remov e th e tw o screws , an d replac e th e
controller .
SCREWS
ProCarManuals.com

LEFT REA R DOO R SWITCH *
Test , pag e 23-26 4
LEF
T REA R DOO R
COURTES Y LIGH T
Replacement ,
pag e 23-26 3
DRIVER'
S DOO R
COURTES Y LIGH T
Replacement ,
pag e 23-26 3
DRIVER'
S DOO R SWITCH *
Test , pag e 23-26 4 FRON
T CEILIN G LIGH T
Test , pag e 23-26 2FRON
T PASSENGER' S DOO R
COURTES Y LIGH T
Replacement , pag e 23-26 3
REAR CEILIN G LIGH T
Test , pag e 23-26 2
FRON T PASSENGER'S *
DOO R SWITC H
Test , pag e 23-26 4
RIGH T REA R DOO R SWITCH *
Test , pag e 23-26 4
RIGH T REA R DOO R
COURTES Y LIGH T
Replacement ,
pag e 23-26 3
Entry Ligh t Contro l Syste m
Componen t Locatio n Inde x
• IGNITIO N KE Y SWITC HTest, pag e 23-26 3
*: Yo u ca n als o tes t th e switc h b y usin g th e self-diagnosi s functio n (mod e 2) . (Se e pag e 23-252 .)
ProCarManuals.com

Control Uni t Inpu t Tes t
NOTE :
• Befor e testing , g o t o th e Troubleshootin g Guid e (se e pag e 23-244 ). B e sur e t o g o throug h self-diagnosi s functio n
mode s 1 an d 2 (se e page s 23-24 8 an d 23-252 ).
• Al l connecto r view s ar e fro m th e wir e sid e o f femal e terminal s unles s otherwis e noted .
Multiple x Contro l Uni t (Passenger's) :
1 . Remov e th e righ t kic k pane l (se e sectio n 20 ).
2 . Disconnec t th e 22 P an d 26 P connectors , the n remov e th e passenger' s uni t (se e pag e 23-246 ).
3 . Inspec t th e connecto r an d socke t terminal s t o b e sur e the y ar e al l makin g goo d contact .
• I f th e terminal s ar e bent , loos e o r corroded , repai r the m a s necessary , an d rechec k th e system .
• I f th e terminal s loo k OK , mak e th e followin g inpu t test s a t th e connector .
I f a tes t indicate s a problem , fin d an d correc t th e cause , the n rechec k th e system .
I f al l th e inpu t test s prov e OK , th e powe r windo w maste r switc h mus t b e faulty ; replac e it .
Disconnec t th e connector s fro m th e passenger' s unit .
Cavit y Wir e Tes t conditio n Test : Desire d resul t Possible caus e if resul t i s no t obtaine d
B10
B2 1
BLU/RE D
LT
GRN/BL K
Turn th e ceilin g ligh t
switc h MIDDL E an d al l
door s close d
Al l door s close d Connec
t t o ground :
Ceilin g ligh t shoul d com e on .
Connec t t o ground :
Courtes y light s shoul d com e on . •
Blow n No . 5 7 (2 0 A ) fus e in th e
under-hoo d fuse/rela y bo x
• Fault y ceilin g ligh t
• A n ope n in th e wir e
• Fault y courtes y ligh t
• A n ope n in th e wir e
Reconnec t th e connector s to th e passenger' s unit .
Cavit y Wir e Test conditio n
Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
A23
B18
GRN/RE D
GRN/OR N
Front passenger' s doo r
opene d
Front passenger' s doo r
close d
Right rea r doo r opene d
Righ t rea r doo r close dChec
k fo r voltag e to ground :
Ther e shoul d b e les s tha n 1 V .
Chec k fo r voltag e t o ground :
Ther e shoul d b e 5 V or more .
Chec k fo r voltag e to ground :
Ther e shoul d b e les s tha n 1 V .
Chec k fo r voltag e to ground :
Ther e shoul d b e 5 V or more . •
Fault y fron t passenger' s doo r
switc h
• Poo r groun d (G401 , G402 )
• A n ope n in th e wir e
• Fault y righ t rea r doo r switc h
• Poo r groun d (G601 )
• A n ope n in th e wir e
ProCarManuals.com