1996 ACURA RL KA9 fuse box

Disconnect the connector from the unit

Cavity Wire Test condition
Test: Desired result
Possible cause if result is not obtained

12

23
BRN

GRY
Under all conditions

Under all conditions
Check for continuity to ground:

There should be continuity.

Check for continuity to ground:

There should be continuity.
• An open in the wire

• An open in the wire

Reconnect the connectors from the unit

Cavity Wire Test condition
Test: Desired result

Possible cause if result is not obtained

22

21

25

20

15

14

11

8

2
GRY

GRY

YEL

YEL

GRY

GRY

BRN

GRY

YEL
Ignition switch in ACC

(I)

Ignition switch in ACC

(I)

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed

Ignition switch in ACC (I)

OnStar "Emergency"

button pushed
Check for voltage to ground:

There should be about 10 V.

Check for voltage to ground:

There should be about 7 V.

Check for voltage to ground:

There should be about 6 V.

Check for voltage to ground:

There should be about 3 V.

Check for voltage to ground:

There should be 1 V or less.

Check for voltage to ground:

There should be 1 V or less.

Check for voltage to ground:

There should be about 6.6 V.

Check for voltage to ground:

There should be about 3.8 V.

Check for voltage to ground:

There should be about 0 V.
• Blown No. 56 (7.5 A) fuse in the

under-hood fuse/relay box

• An open in the wire

• Blown No. 4 (10 A) fuse in the

under-dash fuse/relay box

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• Faulty OnStar button and micro-

phone

• An open in the wire

• An open in the wire

• An open in the wireProCarManuals.com

(From pag e 11-70 )
I s th e fus e OK ?
NO
Is th e fus e OK ?
YES
Chec k fo r a n ope n i n th e wire s
(IG P lines) :
1 . Disconnec t th e fue l injecto r
an d IA C valv e connectors .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e voltag e betwee n
bod y groun d an d th e PC M
connecto r terminal s A1 3 an d
B1 individually .
Is ther e batter y voltage ?
YES
Repai r shor t i n th e wir e
betwee n No . 6 EC U (PCM ) (2 0
A ) fus e an d PGM-F I mai n
relay.Repai r shor t i n th e wir e
betwee n PGM-F I mai n rela y
an d th e PCM , fue l injectors ,
o r IA C valve .
Repai r shor t i n th e wir ebetwee n fue l injector s an d
IA C valve .
Replac e No . 6 EC U (PCM ) (2 0
A)fuse .
Repair shor t i n th e wir e
betwee n No . 2 5 IG COI L (3 0 A )
fus e an d PGM-F I mai n relay .
Replac e No . 2 5 IG COI L (3 0 A )
fuse .
Repai r ope n i n th e wire(s )
betwee n th e PC M (A13 , B9 )
an d PGM-F I mai n relay .
Chec k fo r a poo r connectio n
o r loos e wire s a t th e PGM-F I
mai n relay .
Test th e PGM-F I mai n relay .Repai r shor t o r ope n i n th e
wir e betwee n th e immobilize r
uni t an d PCM .
(T o pag e 11-72 )
Inspec
t No . 2 5 IG COI L (3 0 A ) fus e
in th e under-das h fuse/rela y box .
Inspec t No . 6 EC U (PCM ) (2 0 A )
fus e i n th e under-das h fuse/rela y
box.
ProCarManuals.com

Emission Contro l Syste m
Exhaus t Ga s Recirculatio n (EGR ) Syste m (cont'd )
(From pag e 11-87 )
Chec k fo r a shor t i n th e wir e
(EGR L line) :Chec k fo r continuit y betwee n
PC M connecto r termina l D1 7 an d
th e bod y ground .
I s ther e continuity ?
YES
Repai r shor t i n th e wir e betwee n
th e EG R valv e an d PC M (D17) .
(Fro m pag e 11-87 ) Repai
r ope n i n th e wir e betwee n
th e EG R valv e an d th e PC M (D17) .
Chec k fo r a n ope n in th e wir e (IG 1
line) :1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e contro l bo x
connector .
3 . Tur n th e ignitio n switc h O N (II) .
4 . Measur e voltag e betwee n bod y
groun d an d th e contro l bo x
connecto r termina l No . 1 .
I s ther e batter y voltage ?
YES
Chec k th e vacuu m routing :
1 . Reconnec t th e vacuu m pump /
gaug e to th e No . 1 1 hose .
2 . Star t th e engin e an d le t i t idle .
3. A t th e contro l bo x side , con -nect th e batter y positiv e ter -
mina l t o th e EG R valv e vacu -
u m contro l solenoi d valv e
connecto r termina l No . 1 .4. Whil e watchin g th e vacuu m
gauge , connec t th e batter y neg -
ativ e termina l t o th e EG R valv e
vacuu m contro l solenoi d
valv e connecto r termina l No . 2 .
I s ther e abou t 26. 7 kP a
(20 0 mmHg , 8. 0 in.Hg ) o f vacu -
u m withi n 1 second ?
YES
(To pag e 11-89 )
NO
Repai r ope n in th e wir e betwee n
th e EG R valv e vacuu m contro l
solenoi d valv e an d No . 2 0 EC U
(PCM ) (2 0 A ) fus e in th e under -
das h fuse/rela y box .
Chec k th e vacuu m hoses :1. Tur n th e ignitio n switc h OFF .
2 . Inspec t th e No . 1 1 an d No . 3
hose s fo r leaks , restriction s o r
misrouting .
Are th e hose s OK ?Correc t a s necessary .
Replace th e EG R valv e vacuu mcontrol solenoi d valve .
ProCarManuals.com

From pag e 14-4
Chec k Torqu e Converte r Clutc h
Solenoi d Valv e A fo r a Shor t
Circuit :
1 . Disconnec t th e 2 P connecto r
from th e torqu e converte rclutch solenoi d valve s A an d B .2. Chec k fo r continuit y betwee n
th e E1 3 an d A2 6 terminals .
Is ther e continuity ?
NO
Repai r shor t t o groun d in th e wir ebetwee n th e E1 3 termina l an d th etorqu e converte r clutc h solenoi dvalve A .
Measur e Torqu e Converte r Clutc h
Solenoi d Valv e A Resistanc e a t
th e Solenoi d Connector :
Measur e th e resistanc e betwee n
the No . 2 termina l o f th e torqu econverte r clutc h solenoi d connec -tor an d bod y ground .
Is th e resistanc e 12-25
NO
Chec k fo r ope n i n th e wir e
betwee n th e E1 3 termina l an d th e
torqu e converte r clutc h solenoi d
valv e A .
I s ther e voltage ?
YES
Chec k fo r ope n i n th e wir e
betwee n th e E 1 termina l an d th e
under-hoo d fuse/rela y box .
Replac e th e torqu e converte r
clutc h solenoi d valve s A an d B .
Chec
k th e V B SO L Voltage :
1. Tur n th e ignitio n switc h O N (II) .2. Measur e th e voltag e betwee n
th e E 1 an d A2 6 terminals .
ProCarManuals.com

From pag e 14-6
Chec k Torqu e Converte r Clutc h
Solenoi d Valv e B fo r a Shor t
Circuit :
1 . Disconnec t th e 2 P connecto r
fro m th e torqu e converte r
clutch solenoi d valve s A an d B .2. Chec k fo r continuit y betwee n
th e E2 6 an d A2 6 terminals .
I s ther e continuity ?
NO
Repai r shor t t o groun d in th e wir e
betwee n th e E2 6 termina l an d th e
torqu e converte r clutc h solenoi d
valv e B .
Measur e Torqu e Converte r Clutc h
Solenoi d Valv e B Resistanc e a t th e
Solenoi d Connector :
Measure th e resistanc e betweenthe No . 1 termina l o f th e torqu e
converte r clutc h solenoi d connec -
tor an d bod y ground .
Is th e resistanc e 12-25
NO
Chec k fo r ope n i n th e wir e
betwee n th e E2 6 termina l an d th e
torqu e converte r clutc h solenoi d
valve B .
Is ther e voltage ? Chec
k fo r ope n i n th e wir e
betwee n th e E 1 termina l an d th e
under-hoo d fuse/rela y box .
Chec
k th e V B SO L Voltage :
1. Tur n th e ignitio n switc h O N (II) .2. Measur e th e voltag e betwee nthe E 1 an d A2 6 terminals .
Replace th e torqu e converte r
clutc h solenoi d valve s A an d B .
ProCarManuals.com

Electrical Troubleshooting

Troubleshooting Flowchart — A/T Clutch Pressure Control Solenoid Valve

• OBD II Scan Tool indicates Code

P0748.

• Self-diagnosis indicator light

indicates Code 16.

Measure A/T clutch pressure con-

trol solenoid valve Resistance at

Solenoid Connector:

1. Disconnect the shift solenoid

valve/A/T clutch pressure con-

trol solenoid valve harness 4P

connector.

2. Measure the resistance of the

A/T clutch pressure control

solenoid valve.

Is the resistance approx. 5 ?

YES

Check A/T Clutch Pressure

Control Solenoid Valve for a

Short Circuit:

1. Disconnect the E (26P) con-

nector from the PCM.

2. Check for continuity between

body ground and the E16 termi-

nal and E3 terminal individually.

Is there continuity?

NO

Measure A/T Clutch Pressure

Control Solenoid Valve Resistance:

1. Connect the shift solenoid

valve/A/T clutch pressure con-

trol solenoid valve harness 4P

connector.

2. Measure the resistance

between the E16 and E3 ter-

minals.

Is the resistance approx. 5 ?

YES

Check the VB SOL Voltage:

1. Disconnect the A (26P) and E

(26P) connectors from the

PCM.

2. Turn the ignition switch ON (II).

3. Measure the voltage between

the E1 and A26 terminals.

Is there voltage?

YES

Check for loose PCM connectors.

If necessary, substitute a known-

good PCM and recheck.
Possible Cause

• Disconnected A/T clutch pres-

sure control solenoid valve con-

nector

• Short or open in A/T clutch

pressure control solenoid valve

wire

• Faulty A/T clutch pressure con-

trol solenoid valve

• Open VB SOL line

Replace the A/T clutch pressure

control solenoid valve.

Repair short in the wires

between the E16 and E3 termi-

nals and the A/T clutch pressure

control solenoid valve.

Repair loose terminal or open in

the wires between the E16 and E3

terminals and the A/T clutch pres-

sure control solenoid valve.

Check for open in the wire

between the E1 terminal and the

under-hood fuse/relay box.ProCarManuals.com

Disconnect the connectors from the unit

Cavity Wire Test condition
Test: Desired result
Possible cause if result is not obtained

A1

A7
BLK
Under all conditions
Check for continuity to ground:

There should be continuity.
• An open in the wire

Reconnect the connectors from the unit

Cavity Wire Test condition
Test: Desired result
Possible cause if result is not obtained

B2

B3

B4

B5

A12

A3

A9

A6

A10

A8

A5

A2

A4

B12

B14
BLU/YEL

YEL/GRN

ORN

WHT/GRN

BLU

PUR

ORN

ORN

BLU

BLK

ORN

GRN

PUR

PNK

GRN
Ignition switch in ACC (I)

Ignition switch in ACC (I)

With the ignition switch

OFF, press and hold the

"DOT" button. Turn the

ignition switch from OFF

to ACC three times and

back to ACC, then release

the "DOT" button.

Ignition switch in ACC (I)

Ignition switch in ACC (I)

Ignition switch turned

OFF

With the ignition switch

OFF, press and hold the

"DOT" button. Turn the

ignition switch from OFF

to ACC three times and

back to ACC, then release

the "DOT" button.

Ignition switch in ACC (I)

Under all conditions

Ignition switch in ACC (I)

Ignition switch in ACC (I)

OnStar "DOT" button

pushed

Ignition switch in ACC (I)

Ignition switch in ACC (I)

Ignition switch in ACC (I)

Ignition switch in ACC (I) On-

Star "DOT" button pushed

Ignition switch in ACC (I)
Check for voltage to ground:

There should be approx 8V.

Check for voltage to ground:

"DOT" button pushed: 280mV

"OnStar" button pushed: 1V

"Emergency" button pushed: 1.7V

Check for voltage to ground:

There should be 4V.

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

There should be no voltage.

Check for voltage to ground:

There should be 10V.

Check for voltage to ground:

There should be 4V.

Check for voltage to ground:

There should be less than 1V.

Check for continuity to ground:

There should be continuity.

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

"DOT" button pushed: 280mV

"OnStar" button pushed: 1V

"Emergency" button pushed: 1.7V

Check for voltage to ground:

There should be about 8V.

Check for voltage to ground:

There should be about 4V.
• Blown No. 56 (7.5 A) fuse in the

under-hood fuse/relay box

• An open in the wire

• Faulty OnStar button

• An open in the wire

• Faulty OnStar button

• An open in the wire

• Faulty OnStar button

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• Poor ground (G401, G402)

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• An open in the wire

• Faulty audio unit

• An open in the wire

• Faulty SRS unit

• An open in the wireProCarManuals.com

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 ).
ProCarManuals.com