1995 ACURA TL ignition

Ignition Syste m
Ignition Contro l Modul e (ICM ) Inpu t Tes t
NOTE :
Se e sectio n 1 1 whe n th e malfunctio n indicator lamp
(MIL ) blinks .
Perform a n inpu t tes t o n th e ignitio n contro l modul e
(ICM) afte r finishin g th e fundamenta l test s fo r th e
ignitio n syste m an d fue l emissio n system .
Disconnec t th e 4 P connecto r fro m th e ICM . Mak e th e fol -
lowin g inpu t test s a t th e connecto r terminals . I f al l test s
prov e OK , ye t th e syste m stil l fail s to work , replac e th e ICM .
IGNITIO NCOIL
WIR E SID E O F FEMAL ETERMINAL S
Check fo r continuit y betwee n th e No . 4 termina l an d
bod y ground .
I f ther e is continuity , g o t o ste p 2 .
I f ther e i s n o continuity , chec k for :
— A n ope n in th e BL K wire .
— Disconnecte d terminals .
— Poo r groun d (G101) .
2. Wit h th e ignitio n switc h O N (II) , ther e shoul d b e bat -
tery voltag e betwee n th e No . 3 (+ ) an d No . 4 (- ) ter -
minals .
I f ther e is batter y voltage , g o t o ste p 3 .
I f ther e is n o voltage , chec k for :
— A n ope n in th e BLK/YE L wire .
— Disconnecte d terminals .
— Fault y ignitio n coi l (se e pag e 23-91 ).
3 . Wit h th e ignitio n switc h O N (II) , ther e shoul d b e bat -
ter y voltag e betwee n th e No . 2 (+ ) an d No . 4 (-) ter -
minals .
I f ther e is n o voltage , chec k for :
— A n ope n i n th e GR N wir e betwee n th e ignitio n
coi l an d ICM .
— Fault y ignitio n coi l (se e pag e 23-91 ).
ProCarManuals.com

Ignition Coil Test

1. Turn the ignition switch OFF.

2. Disconnect the 4P connector and ignition coil wire.

SECONDARY

WINDING

TERMINAL

4P CONNECTOR

TERMINAL SIDE OF

MALE TERMINALS
3. Using an ohmmeter, measure resistance between

the terminals. Replace the coil if the resistance is

not within specifications.

NOTE: Resistance will vary with the coil tempera-

ture; specifications are at 68°F (20°C).

Primary Winding Resistance

(Between the No. 2 and No. 3 terminals):

0.36 - 0.44 ohms

Secondary Winding Resistance

(Between the No. 2 and secondary winding terminals):

10.8-16.2k

Resistance between the No. 3 and No. 4 terminals:

2.0-2.3k

SECONDARY

WINDING

TERMINAL

4. Check for continuity between the No. 1 and No. 2

terminals. Replace the coil if there is no continuity.ProCarManuals.com

Ignition System

Spark Plug Inspection

1. Inspect the electrodes and ceramic insulator for:
2. Check the electrode gap.

• Adjust the gap with a suitable gapping tool.

Electrode Gap

• Replace the plug if the center electrode is rounded

as shown below:

Burned or worn electrodes may be caused by:

• Advanced ignition timing

• Loose spark plug

• Plug heat range too low

• Insufficient cooling

Fouled plug may be caused by:

Retarded ignition timing

Oil in combustion chamber

Incorrect spark plug gap

Plug heat range too high

Excessive idling/low speed running

Clogged air cleaner element

Deteriorated ignition coil or ignition wires

3. Apply a small quantity of anti-seize compound to

the plug threads, and screw the plugs into the cylin-

der head finger-tight. Then torque them to 18 N-m

(1.8 kgf-m, 13 Ibf-ft).
Spark PlugsProCarManuals.com

Speedometer/Trip Meter/Odometer

Troubleshooting

NOTE:

The numbers in the table show the troubleshooting sequence.

If necessary, replace the speedometer, trip meter, and odometer as a unit.

VSS Input Test

Trml

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

1

2

3
BLK

YEL

ORN
Under all conditions

Ignition switch ON (II)

Ignition switch ON (II)
Check for continuity to ground:

There should be continuity.

Check for voltage to ground:

There should be battery voltage.

Check for voltage to ground:

There should be about 5 V or more.
• Poor ground (G101)

• An open in the wire

• Blown No. 1 (10 A) fuse in the

under-dash fuse/relay box

• Short to ground

• An open in the wire

• Short to ground

• An open in the wire

NOTE: A short to ground in the ORN wire can be caused by a short in any component connected to it.ProCarManuals.com

Description

The car is equipped with the following devices to prevent inadvertent shifting:

Key cylinder with interlocked ignition key (Key Interlock System)

Shift lever with shift lock (Shift Lock System)

Key Interlock System:

When the shift lever is in any other position than or is not securely locked in (parking pin switch is ON), a solenoid is

activated, making it impossible to remove the ignition key from the ignition switch.

To be able to remove the key, the shift lever must be in and must be securely locked in this position (parking pin switch

must be turned off by the lock pin).

INTERLOCK LEVER

KEY

INTERLOCK

SOLENOID

ON: LOCK

OFF: UNLOCK
PUSH

KEY

INTERLOCK

SWITCH

The shift lever is in any other position than , and the parking pin switch is ON:

LOCK

SOLENOID

(ON)

The shift lever is in , and the parking pin switch is OFF.

UNLOCK

SOLENOID

(OFF)
PARKING PIN

SWITCH

ARM

PARKING PIN SWITCH

(ON)

PARKING PIN

SWITCH

ARM

PARKING PIN SWITCH

(OFF)
SHIFT LEVER

Shift lever pushed

to the right

SHIFT LEVER

(Shift lever released)

KEY CYLINDERProCarManuals.com

WIRE SID E O F FEMAL E TERMINAL S
Shift Loc k Syste m
Trm l Wir e Test conditio n Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
2
3
6
WHT/GR N
GRN
BLK/BL U
Ignition switc h O N (II )
Brak e peda l pushe d
Ignitio n switc h O N (II )
Brak e peda l an d
accelerato r pushe d a t th e
sam e tim e
Ignitio n switc h O N (II )
Shif t leve r i n Chec
k fo r voltag e t o ground :
Ther e shoul d b e abou t 1 2 V .
Chec k fo r voltag e t o ground :
Ther e shoul d b e 1 V or less .
Chec k fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity . •
Blow n No . 3 0 (2 0 A ) fus e in th e
under-hoo d fuse/rela y bo x
• Fault y TC M
• Fault y brak e switc h (se e pag e
23-184 )
• Fault y throttl e positio n (TP ) senso r
(se e sectio n 11 )
• A n ope n i n th e wir e
• Blow n No . 1 (1 0 A ) fus e in th e
under-das h fuse/rela y bo x
• Fault y shif t loc k solenoi d
• A n ope n i n th e wir e
• Fault y A/ T gea r positio n switc h
• Poo r groun d
• A n ope n i n th e wir e
Ke y Interloc k Syste m
Trm l Wir e Tes t conditio n Test: Desire d resul t Possible caus e if resul t i s no t obtaine d
1
5
4
6
8
WHT/RE D
WHT/BLU
BLK
BLK/BL U
WHT/BL K
Ignition switc h turne d
to AC C (I ) an d ke y
pushe d i n
Unde r al l condition s
Shift leve r i n
Shif t leve r i n an d
pushed to th e righ t
Shift leve r i n an d
release d
Check fo r voltag e t o ground :
Ther e shoul d b e batter y voltage .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e continuity .
Chec k fo r continuit y t o ground :
Ther e shoul d b e n o continuity .•
Blow n No . 3 0 (2 0 A ) fus e in th e
under-hoo d fuse/rela y bo x
• Fault y steerin g loc k assembl y (ke y
interloc k solenoid )
• A n ope n i n th e wir e
• Poo r groun d (G401 , G404 )
• A n ope n i n th e wir e
• Fault y A/ T gea r positio n switc h
• Poo r groun d
• A n ope n i n th e wir e
• Fault y parkin g pi n switc h
• Poo r groun d (G401 , G404 )
• A n ope n in th e wir e
• Fault y parkin g pi n switc h
• Shor t t o groun d
ProCarManuals.com

Key-in Reminde r Syste m
Entry Ligh t Time r Syste m
Ignition Ke y Switc h Tes t
SRS component s ar e locate d in 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 : Refe r t o pag e 23-152 for the input test of
the beepe r circuit.
Whe n th e ignitio n ke y i s no t removed , th e key-i n beepe r
i n th e integrate d contro l uni t sense s groun d throug h th e
close d ignitio n ke y switch . Whe n yo u ope n th e driver' s
door, th e beepe r circui t sense s groun d throug h th e
close d doo r switch . Wit h groun d a t th e "BLU/WHT2" an d
"A13 " terminals , th e beepe r sounds .
1 . Remov e th e dashboar d lowe r cove r an d kne e bol -
ste r (se e pag e 23-64 ).
2 . Disconnec t th e 8 P connecto r fro m th e mai n wir e
harness .
8PCONNECTO R
TERMINAL SID E O F
MAL E TERMINAL S
3. Chec k continuit y betwee n terminal s No . 4 an d No . 7 .
Ther e shoul d b e continuit y wit h th e ke y i n th e
ignitio n switch .
There shoul d b e n o continuit y wit h th e ke y
removed .
Ignition Ke y Ligh t Tes t
SRS component s ar e locate d in 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 .
1 . Remov e th e dashboar d lowe r cove r an d kne e bol -
ste r (se e pag e 23-64 ).
2 . Disconnec t th e 8 P connecto r fro m th e mai n wir e
harness .
8PCONNECTO R
TERMINAL SID E OF
MAL E TERMINAL S
3. Connec t powe r i s t o termina l No . 8 , an d groun d t o
termina l No . 2 . Th e LE D shoul d com e on . I f th e LE D
doe s no t com e on , replac e it .
ProCarManuals.com

Troubleshooting (With Keyless Entry) ('98 model)

NOTE: The numbers in the table show the troubleshooting sequence.

CAUTION: To prevent damage to the motor, apply battery voltage only momentarily.

NOTE:

When the remote transmitter button is pressed the first time, only the driver's door will unlock. When the button is

pressed the second time, all the doors will unlock.

The doors will relock automatically after 20 seconds if a door is not opened, or the key is out of the ignition switch.

The keyless entry system will not lock the doors when the key is in the ignition switch.ProCarManuals.com