ACURA NSX 1991 Service Repair Manual

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
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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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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

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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

ECM CONNECTOR B (16P)

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

NOTE: Standard battery voltage is 12 V.

*: M/TProCarManuals.com

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

ECM CONNECTOR 0 (22P)

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

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

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
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ECM CONNECTOR G (12P)

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

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