1996 ACURA RL KA9 change time

Engine Coolant Temperature (ECT) Sensor

The HDS or the scan tool indicates Diagnostic Trouble Code (DTC) P0116: A range/performance problem in the

Engine Coolant Temperature (ECT) sensor.

The ECT Sensor is a temperature dependent resistor (thermistor). The resistance of the thermistor decreases as the engine

coolant temperature increases as shown below.

NOTE: If DTC P0117 and/or P0118 are stored at the same time as DTC P0116 and/or P0125, troubleshoot those DTCs first,

then troubleshoot DTC P0116 and/or P0125.

Possible Cause

• ECT sensor deterioration

• Malfunction in the thermostat and the cooling system

Troubleshooting Flowchart

— The MIL has been reported on.

— DTC P0116 is stored.

Problem verification:

1. Turn the ignition switch OFF.

2. Check the ETC output tempera-

ture or voltage with the HDS or

the scan tool.

Is about 176°F (80°C) or high-

er, or 0.86 V or less indicated?

YES

Problem verification:

1. Note current coolant

temperature.

2. Turn the ignition switch OFF.

3. Cool the engine for 1 hour.

4. Check the ETC output temper-

ature or voltage with the HDS

or the scan tool.

Does the ECT change 3.6°F

(2°C) or more?

NO

Replace the ECT sensor.
NO

YES
Problem verification:

1. Note current coolant

temperature.

2. Start the engine. Hold the

engine speed at 3,000 rpm

with no load (in Park or neu-

tral)
until
the
radiator
fan

comes on, then let it idle.

3. Check the ETC output temper-

ature or voltage with the HDS

or the scan tool.

Does the ECT change 3.6°F

(2°C) or more?
NO

YES

Intermittent failure, system is OK

at this time. Check the thermo-

stat and the cooling system.

Intermittent failure, system is OK

at this time. Check the thermo-

stat and the cooling system.

(cont'd)ProCarManuals.com

Troubleshooting Flowchar t
— Th e MI L ha s bee n reporte d on .
— DT C P120 1 throug h P120 6 o r
P130 1 throug h P130 6 i s indi -
cated .
Proble m verification :
1 . Afte r checkin g th e freez e data ,
d o th e PC M Rese t Procedure .
2 . Connec t th e SC S servic e con -
nector .3. Test-driv e th e ca r severa l time s
i n th e rang e o f th e freez e data .
I s an y misfir e DT C indicated ?
NO
Chec k fo r ignitio n coi l malfunction :
1 . Exchang e th e ignitio n coi l fro m
the proble m cylinde r wit h on efrom anothe r cylinder .
2 . Test-driv e th e ca r severa l time s
i n th e rang e o f th e freez e data .
I s an y misfir e DT C indicated ?
YES
NO
(T o pag e 11-62 )
NOTE:• I f ther e i s n o freez e dat a o f misfiring ,
jus t clea r th e DTC .
• I f ther e i s n o freez e dat a o f misfiring ,
tes t drive s unde r variou s condition s ar e
necessary .
Intermitten t misfir e du e t o spar k
plu g fouling , etc . (firin g i s O K a t
thi s time) .
Replac e th e fault y spar k plug .
Intermitten t misfir e du e t o ba d
contac t i n th e ignitio n coi l con -
necto r (firin g is O K a t thi s time) .
Replac e th e fault y ignitio n coil .
Doe
s th e misfir e occu r i n th e othe r
cylinde r whos e spar k plu g wa s
exchanged ?
Does th e misfir e occu r i n th e othe r
cylinde r whos e ignitio n coi l wa s
exchanged ?
1. Exchang e th e spar k plu g fro mthe proble m cylinde r wit h on eof anothe r cylinder .
2 . Test-driv e th e ca r severa l time s
i n th e rang e o f th e freez e data .
ProCarManuals.com

PGM-FI Syste m
Misfire Detecte d i n On e Cylinde r (cont'd )
(From pag e 11-61 )
Chec k th e injecto r function :
Liste n fo r a clickin g soun d a t th e
injecto r i n th e proble m cylinder .
Does it click ?NO
YE SChec k fo r a n ope n o r shor t i n th e
harnes s betwee n th e PC M an d
th e injector .
Are th e wire s OK ?
Chec k fo r injecto r malfunction :1. Exchang e th e injecto r fro m th eproble m cylinde r wit h on efrom anothe r cylinder .
2 . Le t th e engin e idl e fo r 2 min -
utes.3. Test-driv e th e ca r severa l time s
i n th e rang e o f th e freez e data . Repai
r ope n o r shor t i n th e wire .
NOTE : I f ther e i s n o freez e dat a o f mis -
firing , tes t drive s unde r variou s condi -
tion s ar e necessary .
I s an y misfir e DT C indicated ?
YES
Intermitten t misfir e du e t o ba dcontac t i n th e injecto r connecto r
(firin g is O K a t thi s time) .
Doe s th e misfir e occu r i n th e othe r
cylinde r whos e injecto r wa s
exchanged ?Replace th e fault y injector .
NO
(T o pag e 11-63 ) —
Replac e th e injector .
— Substitut e a known-goo d PC M
an d recheck . I f symptom/indi -
catio n goe s away , replac e th e
origina l PCM .
ProCarManuals.com

Navigation Syste m
Genera l Troubleshootin g Informatio n
General Operatio n
Refer t o th e Acur a Navigatio n Syste m Owner' s manua l
fo r th e navigatio n syste m operatin g procedures .
Anti-theft Featur e
The navigatio n syste m ha s a code d thef t protectio n cir -
cuit . B e sur e t o ge t th e customer' s 4-digi t securit y cod e
numbe r before :
• disconnectin g th e batter y
• disconnectin g th e navigatio n uni t 8 P connecto r
• removin g th e No . 5 6 (7.5A ) fus e fro m th e under-hoo d
fuse/rela y bo x
Afte r service , reconnec t powe r t o th e navigatio n unit ,
an d tur n th e ignitio n switc h O N (II) . Ente r th e 4-digi t
securit y code , the n selec t "Done" .
I f th e cod e canno t b e found , us e th e interactiv e Networ k
( iN ) t o loo k i t up . Yo u wil l nee d th e seria l numbe r fo r
th e navigatio n uni t i n th e trunk . I t i s o n a ta g o n th e
undersid e o f th e unit . Alternatively , yo u ca n vie w th e
seria l numbe r i n on e o f th e Nav i EC U diagnosti c
screens.
When replacin g th e navigatio n unit , b e sur e t o giv e th e
custome r th e ne w anti-thef t securit y code .
Sympto m Diagnosi s
Under som e circumstances , th e navigatio n syste m ma y
behav e in a n inconsisten t manner . Som e customer s ma y
thin k tha t thi s indicate s a proble m when , i n fact , th e
syste m is workin g properly . Kee p th e followin g item s i n
min d whe n interviewin g customer s abou t symptom s
o f th e navigatio n system .
Self-lnertia l Navigatio n Limitation s
When GP S signal s canno t b e receive d (lik e in a tunne l o r
i n a n urba n environmen t o f tal l buildings) , th e syste m is
totall y dependan t o n th e ya w rat e an d spee d senso r t o
positio n th e vehicl e o h th e map . Unde r thes e circum -
stance s smal l error s i n th e ya w rat e an d spee d senso r
ca n accumulat e an d displa y th e vehicl e positio n o n a n
adjacen t street , o r laggin g behin d th e actua l position .
Thi s i s normal , an d usuall y correct s itsel f onc e sate -
llit e receptio n is re-established .
Th e followin g circumstance s ma y cause s vehicl e posi -
tionin g errors . •
Movin g th e vehicl e wit h th e navigatio n syste m o n an d
th e vehicl e stopped , suc h a s b y ferr y o r to w truck , o r i f
th e vehicl e is spu n o n a tur n tabl e
• Tir e slippage , change s i n tir e rollin g diameters , an d
som e drivin g situation s ma y caus e discrepancie s i n
trave l distances . Example s o f thi s include :
- Continuou s tir e slippag e o n a slipper y surfac e
- Drivin g wit h sno w chain s mounte d
-Abnorma l tir e pressur e
- Incorrec t tir e siz e
- Frequen t lan e change s acros s a wid e highwa y
-Continuou s drivin g o n a straigh t o r gentl y curvin g
highwa y
• Tolerance s i n th e syste m an d ma p inaccuracie s some -
times limi t ho w precisel y th e vehicl e positio n i s indi -
cated . Example s o f thi s include :
- Drivin g o n road s no t show n o n th e ma p (ma p match -
in g i s no t possible )
- Drivin g o n a roa d tha t wind s i n on e direction , suc h a s
a loo p bridge , a n interchange , o r a spira l parkin g
garage
-Drivin g o n a roa d wit h a serie s o f shar p hair-pi n
turn s
- Drivin g nea r a gradua l highwa y exi t o r transitio n
- Drivin g o n on e o f tw o close paralle l road s
- Makin g man y 9 0 degre e turn s
Globa l Positionin g Syste m (GPS ) Limitation s
The GP S canno t detec t th e vehicle' s positio n durin g th e
followin g instances :
• Fo r th e firs t 5 to 1 0 minute s afte r reconnectin g th e bat -
ter y (thi s ca n tak e a s lon g a s 4 5 minutes )
• Whe n th e satellit e signal s ar e blocke d b y tal l building ,
mountains , tunnels , larg e trees , o r larg e truck s
• Whe n ther e i s n o satellit e signa l outpu t (Signa l outpu t
i s sometime s stoppe d fo r satellit e servicing )
• Whe n th e satellit e signal s ar e blocke d b y th e operatio n
of som e electroni c aftermarke t accessorie s including ,
but no t limite d t o non-DE M in-das h entertainmen t
unit s (radio , C D players/changers , an d L o Jack ) an d
windo w tintin g abov e th e GP S antenn a
Th e accurac y o f GP S is reduce d durin g thes e instances :
• Whe n onl y tw o satellit e signal s ca n b e receive d (Thre e
satellit e signal s ar e require d fo r accurat e positioning )
• Whe n th e satellit e contro l center s ar e experiencin g
problem s
• Whe n drivin g hea r hig h tensio n powe r lines .
• Whe n drivin g nea r tal l building s tha t reflec t satellit e
signals , creatin g fals e positio n locatio n readings .
• I f electroni c GP S jammin g i s occurrin g eithe r inten -
tionally , o r unintentionally .
• I f loos e item s o r pet s ar e restin g abov e th e antenn a
o n th e rea r shelf .
ProCarManuals.com

Navigation Unit

The navigation unit calculates the vehicle position and guides you to the destination. The unit performs map matching

correction, GPS correction, and distance tuning. It also controls the menu functions and the DVD-ROM drive, and inter-

prets voice commands. With control of all these items, the navigation unit makes the navigation picture signal, then it

transmits the signal to the display unit and audio driving instructions to the audio unit.

Calculation of Vehicle Position

The navigation unit calculates the vehicle position (the driving direction and the current position) by receiving the direc-

tional change signals from the yaw rate sensor and the travel distance signals from the vehicle speed pulse (VSP) sensor.

Map Matching Tuning

The map matching tuning is accomplished by indicating the vehicle position on the roads on the map. The map data

transmitted from the DVD-ROM is checked against the vehicle position data, and the vehicle position is indicated on the

nearest road. Map matching tuning does not occur when the vehicle travels on a road not shown on the map, or when the

vehicle position is far away from a road on the map.

GPS Tuning

The GPS tuning is accomplished by indicating the vehicle position as the GPS's vehicle position. The navigation unit com-

pares its calculated vehicle position data with the GPS vehicle position data. If there is a large difference between the two,

the indicated vehicle position is adjusted to the GPS vehicle position.

Distance Tuning

The distance tuning reduces the difference between the travel distance signal from the VSP and the distance data on the

map. The navigation unit compares its calculated vehicle position data with the GPS vehicle position data. The navigation

unit then decreases the tuning value when the vehicle position is always ahead of the GPS vehicle position, and it increas-

es the tuning value when the vehicle position is always behind the GPS vehicle position.

Route Guidance

The navigation unit can calculate different routes to a selected destination. You have five options:

• Direct Route - Calculate a route that is the most direct and will take the least tome.

• Easy Route - Calcute a route that minimizes the number of turns needed.

• Minimize Freeways - Calculate a route that avoids freeway travel. If that is not possible, keep the amount of freeway

travel to a minimum.

• Minimize Toll Roads - Calculate a route that avoids, or minimizes travel on toll roads.

• Maximize Freeways - Calculate a route that uses freeways as much as possible.

Audio Guidance

The navigation unit transmits audio driving instructions before entering an intersection or passing a junction.

The audio instructions come through the audio unit and the front speakers.

The front speakers are muted whenever the navigation system is giving guidance commands, and all of the speakers

when the voice control system is being used. When using OnStar, both the audio system and the navigation system are

muted, and the voice control switch (TALK and BACK buttons) is disabled.

DVD-ROM

The map data (including all scale rates) is stored in the DVD-ROM. The map date includes:

• Road distances, road widths, speed limits, traffic regulations, passing time at junction, distances to junctions, and the

driving instructions for audio guidance.

• Latitude and longitude GPS.ProCarManuals.com

Display day/nigh t mod e doe s no t wor k
Diagnosti c Test : Ca r Statu s
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 . Chang e th e day/nigh t mod e t o "AUTO " unde r Set-up ,
an d recheck .
Doe s the display change to day and night modes?
YES—Th e syste m is O K a t thi s time .
NO—G o to ste p 2 .
2 . G o int o th e Diagnosti c Mod e an d us e diagnosti c th e
"Ca r Status " fo r a n IL L signa l (se e pag e 23-45 ) t o
check .
Is the "ILL" signal OK?
YES—Th e syste m is OK .
NO—Chec k th e IL L + circui t betwee n th e navigatio n
uni t an d tailligh t relay .
System lock s u p constantl y
Diagnostic Test : Uni t Chec k
1. Star t th e engin e an d tur n th e ignitio n switc h OFF ,
the n tur n th e ignitio n switc h O N (II) .
Doe s the system reboot?
YES—Th e syste m is O K a t thi s time .
NO—Chec k th e DV D fo r scratche s o r damag e an d th e
navigatio n uni t fo r wate r damage . I f OK , perfor m al l
o f th e "Uni t check " check s unde r Syste m Diagnosi s
Test (se e pag e 23-43 ).
ProCarManuals.com

Navigation System

System Diagnosis Mode (cont'd)

GPS Offset Time

This screen is for factory use only. It allows adjustment

of the GPS time. This display updates in real time.

• "GPS Time" is the time as received from the GPS

satellites. It is in Greenwich Mean Time (GMT).

• "System Time" is the internal time used by the navi-

gation unit to calculate your position on the map.

It is also in Greenwich Mean Time (GMT).

• "Display Time" is the time shown on Setup screen 2

"Adjust Time Zone/Clock", and reflects any changes

due to daylight savings time or time adjustments

entered by the customer.

• Date, Hour, Minute, and "Set" buttons should not be

used.
Mic Level

This diagnostic allows you to independently test the

microphone and the TALK and BACK buttons on the

steering wheel (voice control switch). The microphone

and voice control switch are used to activate the voice

control system. The microphone is located near the map

light in the ceiling. It is directional, and works best if the

voice is coming from the drivers seat.

• Press the TALK button on the steering wheel, and in a

normal voice say "testing". The TALK indicator on

the screen should momentarily become green, and

the text "Now Recording..." should appear in yellow.

In addition, the Mic Level indicator should move at

least to the 6th bar. If the Talk indicator on the screen

does not briefly become green, then check the wiring

from the steering wheel talk button to the navigation

unit. If there is no "Mic Level" movement when you

speak, then you should check the wire running from

the microphone to the control unit.

• Press the BACK button on the steering wheel. This

should cause the Cancel indicator on the screen to

momentarily become green. If it does not briefly

change to green, then check the wiring from the

steering wheel BACK button to the navigation unit.ProCarManuals.com

Valves, Valv e Spring s an d Valve Seals
Installatio n
1. Coa t th e valv e stem s wit h engin e oil . Instal l th e
valve s i n th e valv e guides .
NOTE : Mak e sur e th e valve s mov e u p an d dow n
smoothly .
2. Instal l th e sprin g seat s o n th e cylinde r head .
3 . Instal l th e valv e seal s usin g th e valv e guid e sea l
installer .
NOTE : Exhaus t an d intak e valv e seal s ar e no t inter -
changeable .
WHITE
SPRIN GBLACKSPRIN G
INTAK E VALV E SEA L
EXHAUST VALV E SEA L
VALV E GUID E SEA L
INSTALLE RKD-2899(Commerciall y available )NOTE: Us e smal l I D en d o f tool .
VALV E SEA LReplace .
4. Instal l th e valv e sprin g an d valv e retainer , the n
instal l th e valv e sprin g compressor . Compres s th e
sprin g an d instal l th e valv e keepers .
NOTE : Plac e th e en d o f th e valv e sprin g wit h closel y
woun d coil s towar d th e cylinde r head .
VALV E SPRIN GCOMPRESSO RATTACHMENT
0775 7-PJ1010 A
VALV E SPRIN G COMPRESSO R
Snap-o n CF71 1 o r EQUIVALEN T
(Commerciall y available )
5. Lightl y ta p th e en d o f eac h valv e ste m 2 or 3 time s
wit h a plasti c malle t t o ensur e prope r seatin g o f th e
valv e an d valv e keepers .
NOTE : Ta p th e valv e ste m onl y alon g it s axi s s o
yo u d o no t ben d th e stem .
PLASTI CMALLET
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