relay ACURA RL KA9 1996 Service Manual PDF

DTC 54 : Fail-saf e Rela y
With th e ignitio n switc h O N
(II) , th e AB S indicato r doe s
not g o off .With th e SC S servic e connec -
to r connecte d (se e pag e
19-119 ), DT C 5 4 is indicated .
Check th e AB S (2 0 A ) fus e i n th eunder-hoo d fuse/rela y box , an d
reinstal l th e fus e if i t i s OK .
I s th e fus e OK ?
Replace th e fus e an d recheck .
NOTE : I f th e fus e i s blow n afte r th e fail -
saf e rela y i s on , chec k fo r a shor t t o
bod y groun d i n th e wir e betwee n th e
fail-saf e relay , pum p moto r rela y an d
modulato r unit .
Wire color s o f fail-saf e rela y connector :BRN/BLK, WHT/GRN , BLK , YEL/GR N
Is th e rela y OK ?
Replace th e fail-saf e relay .
Chec k fo r a n ope n in th e + B cir -
cuit :
Measur e th e voltag e betwee n th efail-saf e rela y connecto r termina lNo. 2 an d bod y ground .
FAIL-SAF E RELA Y CONNECTO R
Is ther e batter y voltage ? Repai
r ope n in th e wir e betwee n
th e under-hoo d fuse/rela y bo x
an d th e fail-saf e relay . Termina
l sid e o f femal e terminal s
Chec k fo r a n ope n in th e solenoi d
powe r sourc e circuit :
1 . Connec t th e fail-saf e rela y
connecto r termina l No . 1 to
No . 2 wit h a jumpe r wire .2. Disconnec t th e modulato r uni t
connector .
3 . Measur e th e voltag e betwee n
th e modulato r uni t connecto r
terminal No . 1 0 an d bod yground . MODULATO
R UNI T CONNECTO R
I s ther e batter y voltage ?
(T o pag e 19-140 ) Repai
r ope n in th e wir e betwee n
th e fail-saf e rela y an d th e modu -
lato r unit . Termina
l sid e o f femal e terminal s
JUMPE
R WIR E
Chec
k th e fail-saf e rela y (se e
sectio n 23).
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Troubleshooting
DTC 54 : Fail-saf e Rela y (cont'd )
(From pag e 19-139 )
Chec k fo r a shor t t o powe r i n th e
solenoi d powe r sourc e circuit :
1 . Remov e th e jumpe r wir e fro m
th e fail-safe relay connector .
2 . Measur e th e voltag e betwee n
th e modulato r uni t connecto r
terminal No . 1 0 an d bod yground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
FS R circuit :1. Disconnec t th e AB S contro lunit 22 P connector .
2 . Tur n th e ignitio n switc h O N (II) .
3 . Measur e th e voltag e betwee n
th e termina l No . 2 1 an d bod y
ground .
I s ther e batter y voltage ?
Chec k fo r a shor t t o bod y groun d
i n th e FS R circuit :
Chec k fo r continuit y betwee n th e
AB S contro l uni t 22 P connecto rterminal No . 2 1 an d bod y ground .
I s ther e continuity ?
Chec k fo r a n ope n i n the FSR
GN D circuit :
Chec k fo r continuit y betwee n th e
fail-saf e rela y connecto r termina l
No . 3 an d bod y ground .
I s ther e continuity ?
Check fo r a n ope n in th e FS R cir -cuit :1. Connec t th e fail-saf e rela yconnecto r terminal s No . 3 an dNo. 4 wit h a jumpe r wire .
2 . Chec k fo r continuit y betwee n
th e AB S contro l uni t 22 P con -
necto r termina l No . 2 1 an d
bod y ground .
I s ther e continuity ?
I f th e proble m occur s again ,
replac e th e AB S contro l unit . Repai
r shor t t o powe r i n th e wir e
betwee n th e fail-saf e relay , mod -
ulator uni t an d th e under-hoo dfuse/relay box .
Termina l sid e o f femal e terminal s
ABS CONTRO L UNI T 22 P CONNECTO R
Repai r shor t t o powe r i n th e wir e
betwee n th e AB S contro l uni tand th e fail-saf e relay .Wire sid e o f femal e terminal s
Repair shor t t o bod y groun d in
th e wir e betwee n th e AB S con -
tro l uni t an d th e fail-saf e relay .
FAIL-SAF E RELA Y CONNECTO R
Repair ope n in th e wir e betwee n
th e fail-saf e rela y an d bod y
ground .
Termina l sid e o f femal e terminal s
AB S CONTRO L UNI T 22 P CONNECTO R
Repai r ope n i n th e wir e betwee n
th e AB S contro l uni t an d th e fail -
saf e relay .
Wire sid e o f femal e terminal s
MODULATO
R UNI T CONNECTO R
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Component Locations

SERVICE CHECK CONNECTOR (2P)

ABS CONTROL UNIT

ECT SENSOR

TCS CONTROL VALVE

SENSOR

RIGHT-FRONT

WHEEL SENSOR

TCS CONTROL

VALVE ACTUATOR
LEFT-REAR

WHEEL SENSOR

GAUGE ASSEMBLY

ECU (PCM) (20 A) FUSE

UNDER-HOOD FUSE/RELAY BOX

BATTERY (120 A) FUSE
UNDER-HOOD RELAY BOX C

FAIL-SAFE RELAY

IG SW (50 A) FUSE

METER (15 A) FUSE
METER RELAY
TCS (15 A) FUSE
STOP/HORN

'96 - 98 models: (15 A) FUSE

'99 model: (20 A) FUSE
UNDER-HOOD FUSE/RELAY BOX
UNDER-HOOD RELAY BOX C

LEFT-FRONT WHEEL SENSOR
POWERTRAIN

CONTROL MODULE (PCM)
STEERING ANGLE SENSOR

RIGHT-REAR WHEEL SENSOR

TCS CONTROL UNIT

TCS/CRUISE SWITCH

UNDER-DASH FUSE/RELAY BOX

UNDER-DASH FUSE/RELAY BOX

METER (7.5 A) FUSE

TCS INDICATOR LIGHTProCarManuals.com

TCS CONTROL UNIT 20P CONNECTOR

Wire side of female terminals

VB: Battery Voltage

Terminal

number

1

2

4

5

6

9

10

11

12

13

14

15

16

17

20
Wire

color

BLK/YEL

GRN/RED

BLU

PNK/BLU

BLK/WHT

BLK

BRN/WHT

GRN/WHT

BLU

GRN/ORN

BLK/ORN

BRN/BLK

WHT/BLU

BLU/GRY

GRN

BRN
Terminal sign

(Terminal name)

IG1

(Ignition 1)

PARK

(Parking)

SCS

(Service check

signal)

STR-GND

(Steering ground)

AT-SHIFT

(AT shift)

FSR

(Fail-safe relay)

PMG

(Power motor

Ground)

VPM

(Voltage power

motor)

STOP

(Stop)

NEP (Engine

speed pulse)

BARO

(Barometric)

TC-FC

(Traction control

fuel cut)

LG2

(Logic ground 2)

STR-VCC (Steer-

ing power supply)

WARN2

(Warning 2)

SH-MOT

(Shield motor)

MOT +

(Motor +)

MOT-

(Motor -)
Description

Detects ignition switch

IG1 signal

Detects parking brake

switch signal

Detects service check

connector signal

(Diagnostic trouble

code indication)

Ground for the steering

angle sensor

Detects A/T shift posi-

tion signal

Drives fail-safe relay

Power ground for the

TCS control valve

actuator motor

Power source for the

TCS control valve

actuator motor

Detects brake pedal

position switch signal

Detects engine speed

signal

Detects barometric

sensor signal

TCS Fl, Fuel cut

(torque down) signal

Ground for the logic

circuit

Power source for the

steering angle sensor

Drives TCS indicator light

(The indicator light comes

on by the self-bias)

Shield for the TCS con-

trol valve actuator motor

Drives TCS control

valve actuator motor

Drives TCS control

valve actuator motor
Measurement

terminals

1-GND

2

3-GND

4-GND

5-GND

6-GND

9-GND

10-GND

11-GND

12-GND

13-GND

14-GND

15-GND

16-GND

17-GND

19-20

20-19
Voltage

Conditions

(Ignition Switch ON (II))

Depress the parking

brake pedal.

Release the parking

brake pedal.

SCS service connector

connected.

SCS service connector

disconnected.

Shift the transmission

to position, then

start the engine.

Start the engine.

Start the engine.

Brake pedal depressed.

Brake pedal released.

Engine idling

TCS is functioning,

(maximum fuel cut)

TCS is not functioning.

Indicator light ON

Indicator light OFF

TCS is functioning.

TCS is not functioning.

TCS is functioning.

TCS is not functioning.
Output

voltage

VB

Below 0.6 V

VB

0V

5V

Below 0.3V

About 4V

(5V 0V)

VB

1.5V

Below 0.3 V

0V

VB

VB

0V

About 6V

(12V
0V)

About 3 V

About 1.5V

About 4.5 V

(5 V,
PWM)

Below 0.3V

About 5 V

About 2 V

VB

VB

0V

VB

0VProCarManuals.com

Troubleshooting
TCS Indicato r Ligh t Doe s No t Com e O n
Th e TC S indicato r ligh t doe s no t com e o n whe n ignitio n switc h i s turne d O N (II) .
The TC S indicato r ligh t doe s no t
com e o n whe n ignitio n switc h is
turne d O N (II) .
Chec k th e METE R (1 5 A ) fus e in th e
under-hoo d fuse/rela y bo x an d
METE R (7. 5 A ) fus e i n th e under -
das h fuse/rela y box .
Ar e th e fuse s OK ?
Chec k fo r a n ope n in th e IG 1 cir -
cuit :
1 . Disconnec t th e gaug e assem -
bl y 22 P connector .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e th e voltag e betwee n
th e gaug e assembl y 22 P con -
necto r termina l No . 2 2 an d
body ground .
Is ther e batter y voltage ?
Is th e bul b OK ?
Chec k th e gaug e assembly :
1 . Connec t th e gaug e assembl y
22 P connector .
2 . Connec t th e gaug e assembl y
22 P connecto r termina l No . 7
t o bod y groun d wit h a jumpe r
wire .
Doe s th e TC S indicato r ligh t
com e on ?
T o pag e 19-16 3 NOTE
: Al l indicato r light s excep t th e chargin g
system indicato r ligh t wil l no t com e o n whe none o f thes e fuse s i s blown .
Replac e th e fuse(s ) an d recheck .
NOTE : Reinstal l th e fuse s if the y ar e OK . GAUG
E ASSEMBL Y 22 P CONNECTO R
Repai r ope n in th e wir e betwee n
th e METE R (1 5 A ) fus e i n th e
under-hoo d fuse/rela y bo x an d
gaug e assembly .
Repai r ope n in th e wir e betwee n
th e METE R (7. 5 A ) fus e i n th e
under-das h fuse/rela y bo x an d
bod y ground .
Mete r rela y stuc k OFF .
Replac e th e under-hoo d fuse /
relay bo x o r under-das h fuse /relay box .
(Ope n circui t insid e th e fuse /
rela y box ) Wir
e sid e o f femal e terminal s
Replac e th e TC S indicato r ligh t
bulb.
JUMPE R WIR E
Replac e th e printe d circui t boar d
i n th e gaug e assembly .
Chec
k th e TC S indicato r ligh t bul b
i n th e gaug e assembly .
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Fail-safe Rela y
Diagnosti c Troubl e Cod e (DTC ) 5-1 : Fail-saf e Rela y Diagnosi s
With engin e running , TC S
indicato r ligh t i s ON .
With th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 5- 1 is indicated .
Remov e th e fail-saf e relay , an d
chec k it (se e sectio n 23 ).
I s th e rela y OK ?
Chec k fo r a shor t t o bod y groun d
i n th e FS R circuit :
1 . Disconnec t th e fail-saf e rela y
and TC S control unit 20 P con -nectors .
2 . Chec k fo r continuit y betwee n
the TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .
Is ther e continuity ?
Chec k th e FS R circui t insid e th e
TC S contro l unit :
1 . Connec t th e fail-saf e rela y an d
TC S contro l uni t 20 P connec -
tors .
2. Tur n th e ignitio n switc h O N (II) .3. Measur e th e voltag e betwee nthe TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .
Is ther e batter y voltage ?
Chec k fo r a shor t t o powe r i n th e
VP M circuit :
Measur e th e voltag e betwee n th e
TC S contro l uni t 20 P connecto rterminal No . 1 0 an d bod y ground .
Is ther e batter y voltage ?
Th e syste m is O K a t thi s time .
I f th e proble m recurs , replac e
th e TC S contro l unit . Replac
e th e fail-saf e relay .
TCS CONTRO L UNI T 20 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o bod y groun d i n
th e wir e betwee n th e fail-saf e
rela y an d TC S contro l unit .
Replac e th e TC S contro l unit .
(Shor t circui t insid e th e unit )
Repai r shor t t o powe r i n th e wir ebetwee n th e TC S contro l uni tand fail-saf e relay .
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TCS Contro l Valv e Actuato r
Diagnosti c Troubl e Cod e 5- 4 : Initia l Moto r Operatio n Diagnosi s
5-5 : Moto r Operatio n (1 ) Diagnosi s
5-6 : Moto r Operatio n (2 ) Diagnosi s
5-7 : Ove r Limi t Moto r Curren t Diagnosi s
5-8 : Moto r Drive r Ope n Diagnosi s
5-9 : Unde r Limi t Moto r Curren t Diagnosi s
5-10: Moto r Drive r Shorte d Diagnosi s
With engin e running , TC Sindicato r ligh t i s ON .
Wit h th e SC S servic e connec -
to r connecte d (se e pag e
19-159 ), DT C 5-4 , 5-5 , 5-6 , 5-7 , 5-8 ,5-9 and/o r 5-1 0 ar e indicated .
Chec k th e TC S (1 5 A ) fus e i n th e
under-hoo d fuse/rela y box .
I s th e fus e OK ?
Replace th e fus e an d recheck .
NOTE : Reinstal l th e
fus e i f i t i s OK .
Chec k fo r a n ope n i n th e IG 1 cir -
cuit:1. Tur n th e ignitio n switc h O N (II) .2. Measur e th e voltag e betwee n
th e fail-saf e rela y connecto r ter -
mina l No . 4 an d bod y ground .
NOTE: Star t th e engine , an d rechec k th efuse . I f th e fus e i s blown , chec k fo r ashor t t o bod y groun d in th e VP M circui tbetwee n th e fail-saf e rela y an d TC S con -trol unit .
FAIL-SAF E RELA Y CONNECTO R
Wire sid e o f femal e terminal s
I s ther e batter y voltage ? Repai
r ope n i n th e wir e betwee n
th e EC U (2 0 A ) fus e an d fail-saf e
relay .
Chec k th e fail-saf e rela y (se e
sectio n 23).
I s th e rela y OK ?
Replac e th e fail-saf e relay .TCS CONTRO L UNI T 20 P CONNECTO R
FSR (BLK/WHT )
Check fo r a n ope n in th e FS R cir -cuit :1. Tur n th e ignitio n switc h O N (II) .2. Measur e th e voltag e betwee nthe TC S contro l uni t 20 P con -necto r termina l No . 6 an d bod yground .Wire sid e o f femal e terminal s
I s ther e batter y voltage ?
T o pag e 19-18 8 Repai
r ope n i n th e wir e betwee n
th e fail-saf e rela y an d TC S con -
trol unit .
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Troubleshooting
TCS Contro l Valv e Actuato r (cont'd )
From pag e 19-18 7
Chec k fo r a n ope n in th e VP M + B
circuit :Measur e th e voltag e betwee n th efail-saf e rela y connecto r termina lNo. 2 an d bod y ground .
I s ther e batter y voltage ?
Chec k th e fail-saf e relay :
1 . Connec t th e TC S control unit
20 P connecto r termina l No . 6
an d bod y groun d wit h ajumpe r wire .2. Measur e th e voltag e betwee n
th e fail-saf e rela y connecto r ter -
mina l No . 3 an d bod y ground .
I s ther e batter y voltage ?
Chec k fo r a n ope n i n th e VP M
circuit :
Measur e th e voltag e betwee n th e
TC S contro l uni t 20 P connecto rterminal No . 1 0 an d bod y ground .
I s ther e batter y voltage ?
Chec k th e MO T circuit :
1 . Disconnec t th e jumpe r wir e
and TC S contro l uni t 20 P con -nector .2. Chec k fo r continuit y betwee ntermina l No . 1 9 an d bod yground .
Is ther e continuity ?
T o pag e 19-18 9 Repai
r ope n in th e wir e betwee n
th e TC S (1 5 A ) fus e an d fail-saf e
relay.
Replac e th e fail-saf e relay .
Repai r ope n in th e wir e betwee n
th e fail-saf e rela y an d TC S con -
trol unit .
Chec k fo r a shor t t o bod y groun din th e MO T circuit :1. Disconnec t th e TC S contro lvalve actuato r connector .2. Chec k fo r continuit y betwee ntermina l No . 1 an d bod yground .
I s ther e continuity ?
Repai r shor t t o bod y groun d i n
th e MOT + o r MOT - circui t
between th e TC S contro l uni tand TC S contro l valv e actuator .
FAIL-SAF E RELA Y CONNECTO R
Wire sid e o f femal e terminal s
TC S CONTRO L UNI T 20 P CONNECTO R
JUMPE R
WIRE
Wire sid e o f femal e terminal s
FAIL-SAF E RELA Y CONNECTO R
Wir e sid e o f femal e terminal s
TC S CONTRO L UNI T 20 P CONNECTO R
Wir e sid e o f femal e terminal s
TC S CONTRO L VALV E
ACTUATO R CONNECTO R
Wir e sid e o f femal e terminal s
Replac e th e TC S contro l valv e
assembly . (Shor t circui t insid e
th e motor )
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Component Locations

SERVICE CHECK CONNECTOR (2P)

RIGHT-REAR WHEEL SENSOR

VSA CONVERTER UNIT

VSA MODULATOR

CONTROL UNIT

TCS CONTROL

VALVE SENSOR

RIGHT-FRONT

WHEEL SENSOR
PRECHARGE

PUMP MOTOR
STEERING

ANGLE SENSOR

YAW RATE/LATERAL

ACCELERATION SENSOR

TCS CONTROL VALVE

ACTUATOR

UNDER-HOOD

RELAY BOX C
UNDER-HOOD

FUSE/RELAY BOX
VSA OFF SWITCH

UNDER-DASH FUSE/RELAY BOX

LEFT-FRONT WHEEL SENSOR
LEFT-REAR

WHEEL SENSOR

GAUGE ASSEMBLY

ABS INDICATOR

VSA SYSTEM INDICATOR
UNDER-HOOD FUSE/RELAY BOX

STOP/HORN

(20 A) FUSE

BRAKE SYSTEM INDICATOR

VSA ACTIVATION INDICATOR

UNDER-DASH FUSE/RELAY BOX
TCS

(15 A) FUSE

VSA

(20 A) FUSE

METER

(15 A) FUSE

ECU

(20 A) FUSE

METER

(7.5 A) FUSE
BATTERY

(120 A) FUSE

VSA MOTOR (40 A) FUSE

IG SW (50 A) FUSE

UNDER-HOOD RELAY BOX C

FAIL-SAFE RELAY

GAUGE RELAY
PCM

R/C MIRROR

(7.5 A) FUSEProCarManuals.com

ABS Indicato r Doe s No t Com e O n
Chec k th e indicato r powe r sourc e
circuit :
Turn th e ignitio n switc h O N (II) .
Doe s th e brak e syste m indica -
to r com e on ?
Chec k th e VS A contro l unit :
1. Tur n th e ignitio n switc h OFF .2. Disconnec t th e VS A contro lunit 42 P connector .3. Tur n th e ignitio n switc h O N (II) .
Doe s th e AB S indicato r com e on ?
Chec k th e AB S indicator :
1. Tur n th e ignitio n switc h OFF .2. Chec k th e AB S indicato r bul b in
th e gaug e assembly .
Is th e bul b OK ?
Chec k fo r a shor t t o bod y groun d
i n th e AB S circuit :
1 . Disconnec t th e gaug e assem -
bly 30 P connector .2. Chec k fo r continuit y betwee nterminal No . 6 an d bod yground .
Is ther e continuity ?
(T o pag e 19-212 ) Gaug
e rela y stuc k OFF .
Blow n METE R (1 5 A ) fus e in th e
under-hoo d fuse/rela y box .
Blow n METE R (7. 5 A ) fus e i n
th e under-das h fuse/rela y box .
Repai r ope n in th e wir e betwee n
th e METE R (1 5 A ) fus e an d th e
gaug e assembly .
Repai r ope n in th e wir e betwee n
th e METE R (7. 5 A ) fus e an d bod y
ground .Replac e th e under-hoo d fuse /relay bo x o r under-das h fuse /relay box . (Ope n circui t insid ethe box. )
Check fo r loos e terminal s i n th e
VS A contro l uni t 42 P connector .
I f necessary , substitut e a known -
goo d VS A modulator-contro l
unit , an d recheck .
Replac e th e AB S indicato r bulb .
GAUG E ASSEMBL Y 30 P CONNECTO R
Wir e sid e o f femal e terminal s
Repai r shor t t o bod y groun d in th e
wir e betwee n th e gaug e assembl y
an d th e VS A contro l unit .
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