ACURA NSX 1991 Service Repair Manual

Page 211 of 1640

Troubleshooting
Troubleshooting Procedure s
Symptom Char t
Liste d 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 .
Th e probabl e caus e an d troubleshootin g pag e referenc e ca n b e foun d o n nex t page .
Troubleshoo t fo r misfir e o n page s 11-90 , 11-9 4
Othe r Probabl e Causes :
Engin e 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

Page 212 of 1640

11-61, 11-62
11-132 , 11-13 9
11-14 3
Sectio n 2 3
See DTC chart
See DTC chart
11-12 8
11-15 1
11-15 0
See DTC chart
See DTC chart
See DTC chart
11-121 , 11-12 4
11-126
11-14 9
11-15 4
11-159
11-16 7
Probabl
e Caus e Lis t
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Page 213 of 1640


Troubleshooting

Troubleshooting Procedures (cont'd)

ECM Data

By connecting the OBD-II scan tool or the Honda PGM Tester to the 16P data link connector (DLC), various data can be

retrieved from the ECM. The items listed in the table below conform to the SAE recommended practice.

The Honda PGM Tester also reads data beyond that recommended by SAE.

Understanding this data will help to find the causes of intermittent failures or engine problems.

NOTE:

• The "operating values" given below are approximate values and may be different depending on the environment and

the individual car.

• Unless noted otherwise, "at idle speed" means idling with the engine completely warmed up, A/T in or position,

M/T in neutral, and the A/C and all accessories turned off.ProCarManuals.com

Page 214 of 1640

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Page 215 of 1640


Troubleshooting

Engine Control Module Terminal Arrangement

ECM CONNECTOR A (26P)

ECM CONNECTOR A (26P)
TERMINAL SIDE OF MALE TERMINALS

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

Page 216 of 1640


ECM CONNECTOR B (16P)

ECM CONNECTOR B (16P)
TERMINAL SIDE OF MALE TERMINALS

NOTE: Standard battery voltage is 12 V.

*: M/TProCarManuals.com

Page 217 of 1640


Troubleshooting

Engine Control Module Terminal Arrangement (cont'd)

ECM CONNECTOR C (12P)

TERMINAL SIDE OF MALE TERMINALS

ECM CONNECTOR C (12P)
NOTE: Standard battery voltage is 12 V.

*: M/TProCarManuals.com

Page 218 of 1640


ECM CONNECTOR 0 (22P)

ECM CONNECTOR D (22P)
TERMINAL SIDE OF MALE TERMINALS

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

Page 219 of 1640

Troubleshooting
Engine Contro l Modul e Termina l Arrangemen t (cont'd )
ECM CONNECTO R F (26P )
ECM CONNECTO R F (26P )
TERMINA L SID E O F MAL E TERMINAL S
NOTE: Standar d batter y voltag e is 1 2 V .
*: M/ T
ProCarManuals.com

Page 220 of 1640


ECM CONNECTOR G (12P)

ECM CONNECTOR G (12P)
TERMINAL SIDE OF MALE TERMINALS

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

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