Test ACURA TL 1995 Service Service Manual

Troubleshooting Inde x
NOTE : Thi s operatio n can also b e don e wit h th e Hond a PG M Tester .
19-84
19-8 6
19-87
19-88
19-89
19-9 0
19-9 3
19-9 4
19-9 5
19-98
19-10 0
19-10 2
19-103
19-10 3
is turne d fro m OF F to O N (II) , an d th e contro l uni t confirm s tha t th e syste m is O K whe n th e vehicl e starts .
*2 : Whe n voltag e return s normal , th e AB S indicato r ligh t goe s off .
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Troubleshooting Precaution s
1. I n an y o f thes e cases , th e TC S indicato r ligh t ma y com e o n o r sta y o n eve n th e TC S syste m is normal .
• Th e coolan t temperatur e is 32° F (0°C ) o r below .
• Th e parkin g brak e is applie d fo r mor e tha n 3 0 second s whil e th e vehicl e is bein g driven .
• Th e tir e pressur e is no t a t th e specifie d pressure .
• Th e whee l senso r signa l i s interrupte d durin g drivin g a t th e spee d o f 6 mp h (1 0 km/h ) o r abov e du e to , fo r example ,
th e vehicl e spinning .
• Th e MA P sensor , coolan t temperatur e sensor , IC M o r th e atmospheri c pressur e senso r syste m o f th e PGM-F I syste m
is faulty .
2. TC S doe s no t functio n whe n th e TC S indicato r ligh t i s ON .
3 . Whe n bot h th e TC S indicato r ligh t an d th e MI L ar e ON , troubleshoo t th e PGM-F I syste m first .
4 . Whe n bot h th e TC S indicato r ligh t an d th e AB S indicato r ligh t ar e ON , troubleshoo t th e AB S first .
5 . Th e DT C 4- 9 (AB S down ) i s memorize d whe n th e AB S contro l uni t canno t outpu t th e whee l spee d signa l du e to , fo r
example , a missin g o r blow n AB S B 2 (1 5 A ) fuse . I f yo u fai l t o eras e th e DT C o f th e TC S afte r troubleshootin g th e ABS ,
th e DT C remain s in th e TC S contro l uni t memory . Therefore , b e sur e to test-driv e th e vehicl e an d chec k th e TC S indica -
to r ligh t befor e startin g th e troubleshootin g th e TCS .
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Wiring/Connector Location s
HEATER VALV E CONTRO L SOLENOI D
VALV E CONNECTO R RADIATO
R FA N CONTRO L MODUL E
(Locate d unde r righ t sid e o f dash )
Test , pag e 22-2 0
COMPRESSO R CLUTC H RELA Y
CONNECTO R
Wir e colors : WHT , RED ,
BLK/YE L an d RED/BL U
RADIATO R FA N RELA Y CONNECTO R
Wir e colors : WHT , YEL/WH T
WHT/BLU an d L T GRN/YE L SUNLIGH
T SENSO R
A/ C DIOD E
RADIATO R FA N
CONNECTO R
OUTSID E AI R TEMPERATUR E SENSO R COMPRESSO
R CLUTC H
CONNECTO R
A/ C PRESSUR E SWITC H
CONNECTO R CONDENSE
R FA N RELA Y CONNECTO R
Wir e colors : WHT , YE L
WHT/GR N an d L T GRN/YE L
CONDENSE R FA N CONNECTO R BLOWE
R MOTO R RELA Y
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Troubleshooting

Radiator Fan Control Module Input Tests

NOTE: Perform the following tests with the radiator fan control module 8P connector connected, the ignition switch ON (II),

and the A/C switch OFF. If you find the cause of a problem, correct it before you continue.

RADIATOR FAN CONTROL MODULE 8P CONNECTOR

WIRE SIDE OF FEMALE TERMINALS

Terminal

No.

4

6

7

2

3

1

8

5
Wire

color

BLK

WHT/GRN

BLK/YEL

BLK/YEL

YEL/WHT

YEL

LT

GRN/YEL

ORN
Test condition

Check for voltage to body

ground.

Check for battery voltage:

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Check for battery voltage:

Ignition switch - ON (II)

Connect to body ground:

Ignition switch - ON (II)

Check for voltage.
Desired results

There should be less

than one volt.

There should be battery

voltage.

Condenser fan and radia-

tor fan should come on.

Approx. 11 V (engine oil

temperature below 198°F

[92°C])
Corrective action if desired results are

not obtained

Repair open to body ground.

Check No. 56 (10 A) fuse in the under-

hood fuse/relay box; if OK, repair open

in the WHT/GRN wire.

Check No. 4* fuse in the under-dash

fuse/relay box; if OK, repair open in the

BLK/YEL wire.

Check No. 7 (7.5 A) fuse in the under-

dash fuse/relay box; if OK, repair open in

the BLK/YEL wire.

Replace the radiator fan control module.

Before you connect the new radiator fan

control module, disconnect both fan

relays. Check for continuity between the

YEL/WHT (or YEL) wire and ground, using

the 20 scale on your ohmmeter. There

should be no continuity. If there is conti-

nuity, the new radiator fan control mod-

ule will be damaged when you connect it.

Check for an open in the LT GRN/YEL

wire between the radiator fan control

module and the condenser fan relay or

the radiator fan relay. If OK, check for an

open in the YEL/WHT wire between the

radiator fan control module and the radi-

ator fan relay, or the YEL wire between

the radiator fan control module and the

condenser fan relay. If OK, test the con-

denser fan relay or the radiator fan relay.

Faulty engine oil temperature switch,

short to body ground, or faulty radiator

fan control module.

*No. 4 (15 A):'96 model

No. 4 (20 A): '97 and '98 modelsProCarManuals.com

A/C Service Tips and Precautions

The air
conditioner system uses
HFC-134a
(R-134a)
refrigerant
and
polyalkyleneglycol (PAG) refrigerant
oil*,
which
are not

compatible with CFC-12 (R-12) refrigerant and mineral oil. Do not use R-12 refrigerant or mineral oil in this system, and do

not attempt to use R-12 servicing equipment; damage to the air conditioner system or your servicing equipment will result.

*DENSO ND-OIL 8:

P/N 38897 - PR7 - A01AH: 120 (4 fl-oz, 4.2 Imp-oz)

P/N 38899 - PR7 - A01: 40 (1 1/3 fl-oz, 1.4 Imp-oz)

Use only service equipment that is U.L.-listed and is certified to meet the requirements of SAE J2210 to remove R-134a

from the air conditioner system.

CAUTION: Exposure to air conditioner refrigerant and lubricant vapor or mist can irritate eyes, nose and throat. Avoid

breathing the air conditioner refrigerant and lubricant vapor or mist.

If accidental system discharge occurs, ventilate work area before resuming service.

R-134a service equipment or vehicle air conditioner systems should not be pressure tested or leak tested with compressed

air.

Some mixtures of air and R-134a have been shown to be combustible at elevated pressures and can result

in tire or explosion causing injury or property damage. Never use compressed air to pressure test R-134a service equip-

ment or vehicle air conditioner systems.

Additional health and safety information may be obtained from the refrigerant and lubricant manufacturers.

1. Always disconnect the negative cable from the battery whenever replacing air conditioning parts.

2. Keep moisture and dust out of the system. When disconnecting any lines, plug or cap the fittings immediately; don't

remove the caps or plugs until just before you reconnect each line.

3. Before connecting any hose or line, apply a few drops of refrigerant oil to the O-ring.

4. When tightening or loosening a fitting, use a second wrench to support the matching fitting.

5. When discharging the system, use a R-134a refrigerant Recovery/Recycling/Charging System; don't release refriger-

ant into the atmosphere.

6. Add refrigerant oil after replacing the following parts:

NOTE:

To avoid contamination, do not return the oil to the container once dispensed, and never mix it with other refriger-

ant oils.

Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.

Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash

it off immediately.

Condenser ........................................ 25 (5/6 fl-oz, 0.9 Imp-oz)

Evaporator........................................ 50 (1 2/3 fl-oz, 1.8 Imp-oz)

Line or hose ...................................... 20 (2/3 fl-oz, 0.7 Imp-oz)

Receiver/Dryer
.................................
15
(1/2
fl-oz,
0.5
Imp-oz)

Leakage repair ................................. 25 (5/6 fl-oz, 0.9 Imp-oz)

Compressor ................................ For compressor replacement, subtract the volume of oil drained from the

removed compressor from 140 (4 1/3 fl-oz, 4.9 Imp-oz), and drain the calculated

volume of oil from the new compressor: 140 (4 1/3 fl-oz, 4.9 Imp-oz) — Volume

of removed compressor = Volume to drain from new compressor.

NOTE: Even if no oil is drained from the removed compressor, don't drain more

than 50 (1 2/3 fl-oz, 1.8 Imp-oz) from the new compressor.

REMOVED NEW

COMPRESSOR COMPRESSOR

SAME LEVEL

140 (4 1/3 fl-oz, 4.9 Imp-oz)
DRAINING

VOLUMEProCarManuals.com

A/C System Service

Performance Test

The performance test will help determine if the air con-

ditioner system is operating within specifications.

Use only service equipment that is U.L.-listed and is cer-

tified to meet the requirements of SAE J2210 to remove

HFC-134a (R-134a) from the air conditioner system.

CAUTION: Exposure to air conditioner refrigerant and

lubricant vapor or mist can irritate eyes, nose and

throat. Avoid breathing the air conditioner refrigerant

and lubricant vapor or mist.

If accidental system discharge occurs, ventilate work

area before resuming service.

R-134a service equipment or vehicle air conditioner sys-

tems should not be pressure tested or leak tested with

compressed air.

Some mixtures of air and R-134a have been

shown to be combustible at elevated pressures and can

result in fire or explosion causing injury or property

damage. Never use compressed air to pressure test R-

134a service equipment or vehicle air conditioner sys-

tems.

Additional health and safety information may be obtained

from the refrigerant and lubricant manufacturers.

1.

2.
Connect a R-134a refrigerant Recover/Recycling/

Charging System to the vehicle, as shown, follow-

ing the equipment manufacturer's instructions.

Insert a thermometer in the center vent outlet.

Determine the relative humidity and air tempera-

ture.
Recovery/Recycling/Charging System

HIGH-PRESSURE

SIDE

LOW-PRESSURE

SIDE

3. Test conditions:

Avoid direct sunlight.

Open hood.

Open front doors.

Set the temperature control dial on MAX COOL,

the mode control switch on VENT and the recir-

culation control switch on RECIRCULATE.

Turn the A/C switch on, and the fan switch on

MAX.

Run the engine at 1,500 rpm.

No driver or passengers in vehicle

4. After running the air conditioning for 10 minutes

under the above test conditions, read the delivery

temperature from the thermometer in the dash vent

and the high and low system pressure from the A/C

gauges.ProCarManuals.com

5. To complete the charts:

Mark the delivery temperature along the vertical line.

Mark the intake temperature (ambient air temperature) along the bottom line.

Draw a line straight up from the air temperature to the humidity.

Mark a point one line above and one line below the humidity level (10% above and 10% below the humidity level).

From each point, draw a horizontal line across the delivery temperature.

The delivery temperature should fall between the two lines.

Complete the low side pressure test and high side pressure test in the same way.

Any measurements outside the line may indicate the need for further inspection.

DELIVERY

PRESSURE

INTAKE

PRESSURE
DELIVERY

PRESSURE

DELIVERY

TEMPERATURE
DELIVERY

TEMPERATURE

INTAKE TEMPERATURE
INTAKE

PRESSUREProCarManuals.com

Battery
Test
• Batter y flui d (electrolyte ) contain s sulfuri c acid . I t ma y caus e sever e burn s i f i t get s o n you r ski n o r i n you r eyes . Wea r
protectiv e clothin g an d a fac e shield .
I f electrolyt e get s o n you r ski n o r clothes , rins e it of f wit h wate r immediately .
I f electrolyt e get s in you r eyes , flus h it ou t b y splashin g wate r i n you r eye s fo r a t leas t 1 5 minutes ; cal l a physicia n
immediately .
• A batter y give s of f hydroge n gas . I f ignited , th e hydroge n wil l explod e an d coul d crac k th e batter y cas e an d splatte r
aci d o n you . Kee p sparks , flames , an d cigarette s awa y fro m th e battery .
• Overchargin g wil l rais e th e temperatur e o f th e electrolyte . Thi s ma y forc e electrolyt e t o spra y ou t o f th e batter y vents .
Follo w th e charge r manufacturer' s instructions , an d charg e th e batter y a t a prope r rate .
Us e eithe r a JC I o r Bea r ARBS T tester , an d follo w th e manufacturer' s procedures . I f yo u don' t hav e on e o f thes e comput -
erize d testers , follo w thi s conventiona l tes t procedure :
T o ge t accurat e results , th e temperatur e o f th e electrolyt e mus t b e betwee n 70° F (21°C ) an d 100° F (38°C) .
23-56ProCarManuals.com

Starting Syste m
Componen t Locatio n Inde x
SECURIT Y CONTRO L UNI T
(Locate d behin d glov e box )
Inpu t Test , pag e 23-15 1
A/T GEA R POSITIO N SWITC H
Test , pag e 23-10 9
BATTER YTest, pag e 23-5 6
STARTE RTest, pag e 23-6 2
Solenoi d Test , pag e 23-6 3
Replacement , pag e 23-6 4
Overhaul , pag e 23-6 5
Reassembly , pag e 23-6 9
Test
, pag e 23- 63
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Starting Syste m
Starter Tes t
NOTE : Th e ai r temperatur e mus t b e betwee n 5 9 an d
100° F (1 5 an d 38°C ) befor e testing .
Recommende d Procedure :
• Us e a starte r syste m tester .
• Connec t an d operat e th e equipmen t i n accordanc e
wit h th e manufacturer' s instructions .
• Tes t an d troubleshoo t a s described .
Alternat e Procedure :
• Us e followin g equipment :
Ammeter, 0 -40 0 A
Voltmeter , 0 -2 0 V (accurat e withi n 0. 1 volt )
Tachometer , 0 -1,20 0 rp m
• Hoo k u p a voltmete r an d ammete r a s shown .
NOTE : Afte r thi s test , o r an y subsequen t repair , rese t
th e PC M to clea r an y code s (se e sectio n 11 ).
Chec k th e Starte r Engagemen t
1 . Disconnec t th e 8 P an d 6 P connecto r fro m th e ICM .
2. Wit h th e shif t leve r i n tur n th e ignitio n
switch t o STAR T (III) .
• Th e starte r shoul d cran k th e engine . I f th e starte r
doe s no t cran k th e engine , g o to ste p 3 .
• I f i t crank s th e engin e erraticall y o r to o slowly , g o
t o "Chec k fo r Wea r an d Damage " o n th e nex t
page .
3. Chec k th e battery , batter y positiv e cable , ground ,
starte r cu t relay , securit y contro l unit , an d th e wir e
connection s fo r loosenes s an d corrosion . Tes t again . I f
th e starte r stil l doe s no t cran k th e engine , g o to ste p 4 .
4. Unplu g th e connecto r (BLK/WH T wir e an d solenoi d
terminal ) fro m th e starter . Mak e sur e th e shif t leve r
is i n the n connec t a jumpe r wir e fro m th e
batter y positiv e (+ ) termina l t o th e solenoi d termi -
nal. Th e starte r shoul d cran k th e engine .
• I f th e starte r stil l doe s no t cran k th e engine , remov e
it , an d diagnos e it s interna l problem .
• I f th e starte r crank s th e engine , g o t o ste p 5 an d
continu e th e test .
5. Chec k th e ignitio n switch .
6. Chec k th e starte r cu t relay .
7 . Chec k th e A/ T gea r positio n switc h (se e pag e 23-109 ).
8 . Chec k th e securit y contro l unit .
9. Chec k fo r a n ope n i n th e WHT/RE D wir e betwee n
th e ignitio n switc h an d starte r cu t relay , an d chec k
fo r a n ope n i n th e BLK/WH T wir e betwee n th e
starte r cu t rela y an d starter .
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