1997 ACURA NSX Service Repair Manual

Troubleshooting
Troubleshooting Procedure s
I. Ho w T o Begi n Troubleshootin g
Whe n th e Malfunctio n Indicato r Lam p (MIL ) ha s bee n reporte d on , o r ther e is a driveabilit y problem , us e th e appropri -
at e procedur e belo w to diagnos e an d repai r th e problem .
MALFUNCTIO N
INDICATO R
LAM P
(MIL)
A. Whe n th e MI L ha s com e on :
1 . Connec t th e Hond a PG M Teste r o r a n OB D II
sca n too l t o th e 16 P Dat a Lin k Connecto r (DLC )
locate d unde r th e glov e bo x behin d a removabl e
cover.
2. Tur n th e ignitio n switc h O N (II) .
3. Chec k th e DT C an d not e it . Als o chec k an d not e
th e freez e fram e data . Refe r t o th e Diagnosti c
Troubl e Cod e Char t an d begi n troubleshooting .
NOTE:
• Se e th e OB D I I sca n too l o r Hond a PG M
Teste r user' s manual s fo r specifi c operatin g
instructions .
• Th e sca n too l o r teste r ca n rea d th e Diagnosti c Troubl e Code s (DTC) , freez e fram e data , curren t data , an d othe r
Engin e Contro l Modul e (ECM ) data .
• Freez e fram e dat a indicate s th e engin e condition s whe n th e firs t malfunction , misfir e o r fue l tri m malfunctio n
wa s detected . I t can be usefu l informatio n whe n troubleshooting .
B . Whe n th e MI L ha s no t com e on , bu t ther e is a driveabilit y problem , refe r t o th e Sympto m Char t o n pag e 11-40 .
C . DTC s wil l b e indicate d b y th e blinkin g o f th e Malfunctio n Indicato r Lam p (MIL ) wit h th e SC S servic e connecto r con -
nected .
Connec t th e SC S servic e connecto r t o Servic e Chec k Connecto r a s shown . (Th e 2 P Servic e Chec k Connecto r i s
locate d unde r th e das h o n th e passenger' s sid e o f th e vehicle. ) Tur n th e ignitio n switc h o n (II) .
DAT A LIN K CONNECTO R (16P ) SERVIC
E CHEC K
CONNECTO R (2P )
OB D II SCA N TOO L o r
HOND A PG M TESTE R SC
S SERVIC E CONNECTO R
07PAZ-001010 0
ProCarManuals.com

II. Engine Control Module (ECM) Reset Procedure

Either of the following actions, will reset the ECM.

• Using the OBD II scan tool or Honda PGM Tester to clear the ECM's memory.

NOTE: See the OBD II scan tool or Honda PGM Tester user's manuals for specific operating instructions.

• Turn the ignition switch OFF. Remove the CLOCK (7.5 A) fuse from the under-hood fuse/relay box for 10 seconds.

NOTE: If the CLOCK (7.5 A) fuse is removed when the ignition switch is in the ON (II) position, the MIL will come

on and the ECM will store a DTC.

UNDER-HOOD

FUSE/RELAY BOX
CLOCK

(7.5 A) FUSE

III. Final Procedure (this procedure must be done after any troubleshooting)

1. Remove the SCS Service Connector if it is connected. If the SCS service connector is connected and there are no

DTCs stored in the ECM, the MIL will stay on when the ignition switch is turned on.

2. Do the ECM Reset Procedure.

3. Turn the ignition switch OFF.

4. Disconnect the OBD II scan tool or Honda PGM Tester from the Data Link Connector (16P).

IV. Known-Good ECM Substitution

The ECM is part of the immobilizer system. If you substitute a known-good ECM, the ECM will have a different immo-

bilizer code. In order for the engine to start, you must rewrite the immobilizer code with the Honda PGM Tester.ProCarManuals.com

Troubleshooting
Troubleshootin g Procedure s (cont'd )
Sympto m Char t
Listed belo w ar e symptom s an d probabl e cause s fo r problem s tha t d o no t caus e th e Malfunctio n Indicato r Lam p (MIL ) t o
com e on .
I f th e MI L wa s reporte d on , g o t o pag e 11-38 .
Troubleshoo t eac h probabl e caus e in th e orde r liste d (fro m lef t t o right ) unti l th e sympto m is eliminated .
The probabl e caus e an d troubleshootin g pag e referenc e ca n b e foun d o n th e nex t page .
Othe r Probabl e Causes :
Engine wil l no t star t
— Compressio n
— Engin e locke d u p
— Timin g bel t
— Startin g syste m
— Overheatin g
— Batter y
ProCarManuals.com

Probable Caus e Lis t (Fo r th e DT C chart , se e pag e 11-52 .)
Sectio n 2 3
11-5 8
See DTC chart
ProCarManuals.com

Troubleshooting

Engine Control Module Terminal Arrangement

ECM CONNECTOR A (26P)

ECM CONNECTOR A (26P)
Wire side of female terminals

NOTE: Standard battery voltage is 12 V.ProCarManuals.com

ECM CONNECTOR B (16P)
Wire side of female terminals

NOTE: Standard battery voltage is 12 V.

*: M/T
ECM CONNECTOR B (16P)ProCarManuals.com

Troubleshooting
- Engin e Contro l Modul e Termina l Arrangemen t (cont'd )
ECM CONNECTO R C (12P )
Wir e sid e o f femal e terminal s
ECM CONNECTO R C (12P ) NOTE
: Standar d batter y voltag e i s 1 2 V .*:
ProCarManuals.com

ECM CONNECTO R D (22P )
ECM CONNECTO R D (22P) Wir
e sid e o f femal e terminal s
NOTE : Standar d batter y voltag e is 1 2 V .
ProCarManuals.com