ignition ACURA RL KA9 1996 Service Manual PDF

Troubleshooting

DTC 63: Reference Voltage

Check for a short to body ground

in the VREF circuit:

1. Disconnect the PCM connec-

tor D
(22P)
and the VSA
con-

verter unit 26P connector.

2. Check for continuity between

the PCM connector D (22P)

terminal No. 20 and body

ground.

Is there continuity?

Is there about 5 V?

Check for an open in the VREF

circuit:

Measure the voltage between the

VSA converter unit 26P connec-

tor terminal No. 23 and body

ground.

Is there about 5 V?

The system is OK at this time.

If the problem recurs, replace

the VSA converter unit.
Repair short to body ground in

the wire between the PCM and

the VSA converter unit.

Check for loose terminals in the

PCM connectors. If necessary,

substitute a known-good PCM,

and recheck.
PCM CONNECTOR D (22P)

Wire side of female terminals

VSA CONVERTER UNIT 26P CONNECTOR

Repair open in the wire between

the PCM and the VSA converter

unit.
Wire side of female terminals
Check the PCM:

1. Connect the PCM connector D

(22P).

2. Turn the ignition switch ON

(II).

3. Measure the voltage between

the PCM connector D (22P)

terminal No. 20 and body

ground.ProCarManuals.com

DTC 93: Throttle Position Sensor/Steering Angle Sensor
NOTE: When both the VSA indicator and the MIL are ON, troubleshoot the PGM-FI system first.
Check for an open in the THL1circuit:1. Turn the ignition switch ON (II).
2. Measure the voltage between
the VSA converter unit 26Pconnector terminal No. 7 and body ground when the throt-
tle valve is fully closed and
fully open.
Is the voltage as specified?
— Fully closed: about 0.5 V
— Fully open: about 4.5 V
Check the steering angle sensor
4P connector connection.
Is the connector disconnected?
Check for an open in the steering
angle sensor circuits:
1. Turn the ignition switch OFF.2. Disconnect the VSA controlunit 42P connector and thesteering angle sensor 4P con-nector.
3. Check for continuity between
the VSA control unit 42P con-nector terminal No. 39 and
the steering angle sensor 4P
connector terminal No. 4.
4. Check for continuity between
the VSA control unit 42P con-nector t e r m i n a l No. 21 and
the steering angle sensor 4P
connector terminal No. 1.
5. Check for continuity between
the VSA control unit 42P con-nector terminal No. 24 and
the steering angle sensor 4P
connector terminal No. 2.
6. Check for continuity between
the VSA control unit 42P con-nector terminal No. 40 and
the steering angle sensor 4P
connector terminal No. 3.
Is there continuity?
The system is OK at this time. If the problem recurs, replace
the VSA converter unit. VSA CONVERTER UNIT 26P CONNECTOR
Repair open in the wire between
the PCM and the VSA converter unit.
Connect the steering angle sen-
sor 4P connector. VSA CONTROL UNIT 42P CONNECTORWire side of female terminals
STEERING ANGLE SENSOR 4P CONNECTOR Wire side of female terminals
Repair open in the wire between
the steering angle sensor and
the VSA control unit. Wire side of female terminals
YRSA YM
(RED/WHT) CAN (-)
(WHT)
CAN (+) (RED) YRSA YU
(RED/BLU)
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Precharge Brake Line Bleeding

1. Connect the SCS service connector to the service check connector (2P) under the glove box.

2. Press the parking brake pedal.

3. Press the VSA off switch, and hold it.

4. Turn the ignition switch ON (II).

5. Release the VSA off switch after the VSA activation indicator goes off twice.

6. Press the VSA off switch after the VSA activation indicator comes on.

7. Release the VSA off switch after the VSA activation indicator goes off.

8. Press the VSA off switch after the VSA activation indicator starts blinking.

9. Release the VSA off switch after the VSA activation indicator stops blinking.

10. Turn the ignition switch OFF, then repeat steps 2 through 10 for 4 times.ProCarManuals.com

Both Fans Low Speed and Radiator Fan High Speed

Both fans do not run at low speed,

and radiator fan does not run at

high speed (but condenser fan

runs at high speed).

Check for an open in the wire:

1. Disconnect the radiator fan 2P

connector.

2. Turn the ignition switch ON (II)

and the A/C system on to

MAX COOL.

3. Measure the voltage between

the No. 2 terminal and body

ground.
RADIATOR FAN 2P CONNECTOR

Wire side of female terminals

Is there battery voltage?
Repair open in the wire between

the radiator fan relay, the radia-

tor fan main relay and the radia-

tor
fan.

Is there continuity?
Check for an open in the wire

between the radiator fan and

body ground. If the wire is OK,

check for poor ground at G302.
Check for an open in the wire:

1. Turn the ignition switch OFF.

2. Check for continuity between

the No. 1 terminal of the radi-

ator fan 2P connector and

body ground.

Replace the radiator fan motor.ProCarManuals.com

IGNITION CONTRO LMODULE (ICM )
UNDER-HOO D RELA YBOX B
DRIVER' S POWE R WINDO W MOTO R RELA Y B('98-0 1 models )• HOR N RELA Y('96-97 models )• POWE R WINDO W MASTE R SWITC H
RELA Y ('98-0 1 models )
CIGARETT E LIGHTE R RELA Y
• FRON T SEA T HEATE R RELA Y
('96-97 models )• DRIVER' S POWE R WINDO W MOTO R RELA Y A
('9 8-0 1 models )
SPAR K PLU G VOLTAG E
DETECTIO N MODUL E
DIMME R RELA Y •
AB S PUM P MOTO R RELA Y
('96-99 models )• VS A FAIL-SAF E RELA Y
('0 0-0 1 models )
• HEADLIGH T RELA Y
('96-98 models )• HEADLIGH T
LO W BEA M RELA Y
('99-01 models )
TAILLIGH T RELA Y
('9 6 - 9 8 models )
• HEADLIGH T HIG H BEA M RELA Y
('9 9-0 1 models )
UNDER-HOO
D
FUSE/RELAYBOX
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Ignition Switc h
Test
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S ( sectio n 24 ) befor e performin g repair s o r
service .
NOTE: Th e PC M memor y mus t b e rese t afte r reconnectin g
th e batter y (se e sectio n 11 ).
1 . Mak e sur e yo u hav e th e anti-thef t cod e fo r th e radi o
an d th e navigatio n system , the n writ e dow n th e fre -
quencie s fo r th e radio' s prese t buttons .
2 . Disconnec t th e batter y negativ e cable .
3 . Remov e th e dashboar d lowe r cove r (se e sectio n 20 ).
4 . Disconnec t th e 7 P connecto r fro m th e under-das h
fuse/rela y box .
7P CONNECTO R
Wire sid e o f
femal e terminal s
WHTBLK/YE L
YEL
WHT/RE D
BLK/WH T
5. Chec k fo r continuit y betwee n th e terminal s i n eac h
switc h positio n accordin g t o th e table .
6 . I f th e continuit y check s d o no t agre e wit h th e table ,
replac e th e electrica l switch .
7. Afte r reconnectin g th e battery , ente r th e anti-thef t
cod e fo r th e radi o an d th e navigatio n system , the n
ente r th e customer' s radi o statio n presets .
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BLK/YEL
YEL/BLK
BLU/RE D
BLK
WHT/YE L
GRN/BLU
GRN/YE L
RED/GR N
Ignition switc h O N (II )
Unde r al l condition s
Under al l condition s
Under al l condition s
Driver' s doo r ope n
Combinatio n ligh t
switc h O N
(Excep t "AUTO" )
Unde r al l condition sChec
k fo r voltag e to ground :
Ther e shoul d b e batter y voltage .
Chec k fo r voltag e to ground:
Ther e shoul d b e batter y voltage .
Check fo r continuit y to ground :
There shoul d b e continuity .
Chec k fo r voltag e to ground :
There shoul d b e batter y voltage .
Check fo r voltag e t o ground :
Ther e shoul d b e 1 V or less .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r voltag e to ground :
Ther e shoul d b e batter y voltage .•
Blow n No . 2 0 (2 0 A ) fus e in th e
under-das h fuse/rela y bo x
• A n ope n in th e wir e
• Blow n No . 1 9 (7. 5 A ) fus e in th e
under-das h fuse/rela y bo x
• A n ope n in th e wir e
• Fault y headligh t rela y
• A n ope n in th e wir e
• Poo r groun d (G401 , G402 , G651 )
• A n ope n in th e wir e
• Blow n No . 5 6 (7. 5 A ) fus e in th e
under-hoo d fuse/rela y bo x
• A n ope n in th e wir e
• Fault y driver' s doo r switc h
• Poo r groun d (G401 , G402 )
• A n ope n in th e wir e
• Fault y combinatio n ligh t switc h
• Poo r ground (G401, G402 )
• A n ope n in th e wir e
• Fault y tailligh t rela y
• A n ope n in th e wir e
• Blow n No . 1 (1 5 A ) fus e in th e
under-das h fuse/rela y bo x
NOTE : Befor e testing , connec t a voltmete r an d jumpe r wire s a s shown :
JumperwireYEL/BL K
YEL/GR N
Wire sid e o f
femal e terminal s
BLKJumpe r
wir eBRN
RED/YE L
Cavity Wir e Tes t conditio n Test : Desire d resul t Possibl e caus e if resul t i s no t obtaine d
YEL/GR N
Cover th e automati c
lightin g sensor *
Shin e ligh t o n th e
automati c lightin g
sensor
Check fo r voltag e betwee n th e No .
4 termina l an d bod y ground : Ther e
shoul d b e 1 V or less .
Chec k fo r voltag e betwee n th e No .
4 termina l an d bod y ground :
Ther e shoul d b e 5 V or more . •
Fault y automati c lightin g senso r
• A n ope n in th e wir e
• Fault y automati c lightin g senso r
• A n ope n in th e wir e
* : Th e automati c lightin g senso r i s locate d i n th e middl e o f dashboard . Cu t th e ligh t of f completel y wit h a dar k cloth .
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Control Uni t Inpu t Tes t (cont'd )
4. Connec t th e moonroo f 3 P connecto r t o th e righ t
sid e wir e harness .
5 . Disconnec t th e 10 P connecto r fro m th e contro l unit .
6 . Mak e th e followin g inpu t test s a t th e 10 P connector .
• I f an y 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 contro l uni t
mus t b e faulty ; replac e it .
Moonroo f
10P CONNECTO R
MOONROOF CONTRO L UNI T
Possibl e caus e if resul t i s no t obtaine d
Test : Desire d resul t
Tes
t conditio n
Wir eCavit y
Wire sid e o f femal e terminal s
BLU
GR N
BLK
YEL/BL U
Under al l condition s
Ignition switc h O N (II )
Unde r al l condition s
Ignition switc h O N (II )
Ope n switc h O N
(pressed) ,
ignition switc h OFF .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec
k fo r voltag e t o ground :
Ther e shoul d b e batter y
voltage wit h th e limi t switc h 4 ON .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec
k fo r voltag e t o ground :
Ther e shoul d b e batter y
voltage wit h th e limi t switc h 2 ON .
Chec k fo r voltag e t o ground :
Ther e shoul d b e les s tha n 2 V
wit h th e limi t switc h 3 ON .
• Poo r groun d
• Fault y moonroo f switc h
• A n ope n in th e wir e
•
Fault y limi t switc h 4
• A n ope n in th e wir e
•
Poo r groun d
• A n ope n in th e wir e
• Fault y limi t switc h 2
• A n ope n in th e wir e
•
Fault y limi t switc h 3
• A n ope n in th e wir e
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YEL/RED
Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained

Ignition switch ON (II)

Close switch ON

Open switch (manual)

ON

RED/WHT

YEL
Auto open switch ON

Ignition switch ON (II)

YEL/GRN

or YEL

NOTE: The limit switches are switched in the moonroof positions as shown below:
Check for voltage to ground:

There should be battery voltage

with the limit switch 1 ON.

Check for voltage to ground:

There should be less than 2 V.

Check for voltage to ground:

There should be less than 2 V

with the limit switch 1 OFF,

and the limit switch 4 ON.

Check for voltage to ground:

There should be less than 3 V.

Check for voltage to ground:

There should be battery voltage.
• Faulty limit switch 1

• An open in the wire

• Poor ground

• Faulty moonroof switch

• An open in the wire

• Poor ground

• Faulty limit switch 1

• Faulty limit switch 4

• Faulty moonroof switch

• An open in the wire

• Poor ground

• Faulty moonroof switch

• An open in the wire

• An open in the wire

Tilt up Fully-closed Auto stop Fully-open

The moonroof stops automatically only when moving from open to closed when the limit switch 3 is turned ON.
Limit

switch 1

Limit

switch 2

Limit

switch 3

Limit

switch 4
ON

OFF

ON

OFF

ON

OFF

ON

OFFProCarManuals.com

Description
The vehicl e is equippe d wit h a n immobilize r syste m tha t wil l disabl e th e vehicl e unles s th e prope r ignitio n ke y i s used .
Thi s syste m consist s o f a transponde r locate d in th e ignitio n key , a receiver , a contro l unit , a n indicato r light , an d th e PCM .
Th e vehicl e ha s tw o kind s o f keys .
• Th e maste r ke y i s for :
ignitio n switch .
door locks .
trunk lock .
• Th e vale t ke y i s for :
ignitio n switch .
door locks .
• Th e learnin g ke y i s fo r rewritin g th e immobilize r sys -
tem.
NOTE : Thi s ke y canno t star t th e engine ; d o no t us e it
excep t fo r rewritin g th e system . I f someon e trie s t o
star t th e engin e wit h th e learnin g key , al l maste r an d
vale t key s mus t b e relearned .
Whe n th e ke y i s inserte d i n th e ignitio n an d turne d t o th e (II ) position , th e immobilize r contro l uni t send s powe r t o th e
transponde r throug h th e receiver .
Th e transponde r the n send s a code d signa l bac k throug h th e receive r t o th e contro l unit .
Th e contro l uni t i n tur n signal s th e PCM , a s wel l a s th e starte r cu t relay .
IMMOBILIZE R RECEIVE R
IGNITION KEY(Ha s built-i n transponder ) •
FUE L SUPPL Y
SYSTE M
• STARTIN G
SYSTEM
PCM
BLAC K
GRAY
RED
(cont'd )
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