1997 ACURA NSX Service Repair Manual

Wire sid e o f femal e terminal s
ECM CONNECTO R G (12P )NOTE : Standar d batter y voltag e is 1 2 V .
Termina l
number
2
3
4
5
7
8
9
10
1 1
1 2
Wir e
colo r
GRN/RE D
GRN/RE D
BRN
WHT/GR N
BLK
BL K
OR N
GR N
YEL
RE D
Termina l nam e
IGM1 (POWE R SOURCE )
IGM2 (POWE R SOURCE )
PM1 (MOTO R PHAS E
OUT1)
PM2 (MOTO R PHAS E
OUT 2 )
PGM 1 (POWE R GROUND )
PGM2 (POWE R GROUND )
COM1 (COMMO N POWE R
SOURC E FO R MOTO R
PHASE 1 an d 3 )
COM 2 (COMMO N POWE R
SOURC E FO R MOTO R
PHASE 2 an d 4 )
PM 3 (MOTO R PHAS E
OUT 3 )
PM 4 (MOTO R PHAS E
OUT 4 )
Descriptio n
Power sourc e fo r throttl e
valv e contro l moto r
Powe r sourc e fo r throttl e
valv e contro l moto r
Send s puls e to throttl e valv e
contro l moto r
Send s puls e to throttl e valv e
contro l moto r
Powe r groun d fo r throttl e
valv e contro l moto r
Powe r groun d fo r throttl e
valv e contro l moto r
Send s powe r sourc e to
throttl e valv e contro l moto r
Send s powe r sourc e to
throttl e valv e contro l moto r
Send s puls e to throttl e valv e
contro l moto r
Send s puls e to throttl e valv e
contro l moto r
Signal
With ignitio n switc h O N (II) :
batter y voltag e
Wit h ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) :
batter y voltag e
Wit h ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : 0 V or
pulse s
With ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : 0 V or
pulse s
With ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : pulse s
Wit h ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : pulse s
Wit h ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : 0 V or
pulse s
With ignitio n switc h OFF : 0 V
Wit h ignitio n switc h O N (II) : 0 V or
pulse s
With ignitio n switc h OFF : 0 V
EC M CONNECTO R G (12P )
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Troubleshooting
Diagnostic Troubl e Cod e (DTC ) Char t
DTC
(MIL indication* )
P0107 (3 )
P010 8 (3 )
P0111 (10 )
P011 2 (10 )
P011 3 (10 )
P011 6 (86 )
P011 7
(6 )
P0118 (6 )
P0122 (7 )
P0123 (7 )
P0131 (2 )
P0132 (2 )
P013 3 (62 )
P013 5 (42 )
Detection Ite m
Manifol d Absolut e
Pressur e Circui t
Low Inpu t
Manifol d Absolut e
Pressur e Circui t
Hig h Inpu t
Intak e Ai r
Temperatur e Circui t
Range/Performanc e Proble m
Intak e Ai r
Temperatur e Circui t
Low Inpu t
Intake Ai r
Temperatur e Circui tHigh Inpu t
Engin e Coolan t
Temperatur e Circui t
Range/Performanc e Proble m
Engin e Coolan t
Temperatur e Circui t
Low Inpu t
Engin e Coolan t
Temperatur e Circui t
Hig h Inpu t
Throttl e Positio n
Circui t
Low Inpu t
Throttl e Positio n
Circuit
Hig h Inpu t
Rea r Primar y Heate d Oxyge n
Senso r
Circui t Lo w Voltag e
(Ban k 1 , Senso r 1 )
Rea r Primar y Heate d Oxyge n
Sensor
Circuit Hig h Voltag e
(Ban k 1 , Senso r 1 )
Rea r Primar y Heate d Oxyge n
Sensor
Slow Respons e
(Ban k 1 , Senso r 1 )
Rea r Primar y Heate d Oxyge n
Senso r Heate r
Circui t Malfunctio n
(Ban k 1 , Senso r 1 ) Probabl
e Caus e
• Ope n o r shor t i n MA P senso r circui t
• MA P senso r
•ECM
•TCM
• Ope n in MA P senso r circui t
• MA P senso r
• EC M
• IA T senso r
• Shor t i n IA T senso r circui t
• IA T senso r
•ECM
• Ope n i n IA T senso r circui t
• IA T senso r
•ECM
• EC T senso r
• Coolin g syste m
• Shor t i n EC T senso r circui t
• EC T senso r
•ECM
• Ope n in EC T senso r circui t
• EC T senso r
•EC M
• Ope n o r shor t i n T P senso r circui t
• T P senso r
• EC M
•TC M
• Ope n i n T P senso r circui t
• T P senso r
•ECM
• Shor t i n Rea r Primar y H02 S (Ban k 1 ,
Senso r 1 ) circui t
• Rea r Primar y H02 S (Ban k 1 , Senso r 1 )
• Fue l suppl y syste m
•EC M
• Ope n i n Rea r Primar y H02 S (Ban k 1 ,
Senso r 1 ) circui t
• Rea r Primar y H02 S (Ban k 1 , Senso r 1 )
•EC M
• Rea r Primar y HO2 S (Ban k 1 , Senso r 1 )
• Exhaus t syste m
• Ope n o r shor t i n Rea r Primar y HO2 S
(Ban k 1 , Senso r 1 ) heate r circui t
• EC M
Pag e
11-6 5
11-6 7
11-6 9
11-70
11-7 1
11-7 2
11-7 3
11-7 4
11-7 5
11-7 7
11-7 8
11-8 0
11-8 1
11-8 5 ('97-01)
*: Thes e 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
connecte d
Note: Refer to page 11-48c or 11-9g for DTCs not listed on this chart.
11-32e ('02)
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DTC(MI L indication )
P0137 (64 )
P013 8 (64 )
P013 9 (64 )
P0141 (66 )
P015 1
(1 )
P0152 (1 )
P015 3 (61 )
P015 5 (41 )
P015 7 (63 )
P015 8 (63 )
P015 9 (63 )
P0161 (65 )
P017 1 (46 )
P0172 (46 )
Detection Ite m
Rea r Secondar y Heate d Oxyge nSensorCircuit Lo w Voltag e
(Ban k 1 , Senso r 2 )
Rea r Secondar y Heate d Oxyge n
Senso r
Circui t Hig h Voltag e
(Ban k 1 , Senso r 2 )
Rea r Secondar y Heate d Oxyge n
Senso r
Slo w Respons e
(Ban k 1 , Senso r 2 )
Rea r Secondar y Heate d Oxyge n
Senso r Heate r
Circui t Malfunctio n
(Ban k 1 , Senso r 2 )
Fron t Primar y Heate d
Oxyge n Senso r Circui t
Lo w Voltag e
(Ban k 2 , Senso r 1 )
Fron t Primar y Heate d
Oxyge n Senso r Circui t
Hig h Voltag e
(Ban k 2 , Senso r 1 )
Fron t Primar y Heate d
Oxyge n Senso r
Slo w Respons e
(Ban k 2 , Senso r 1 )
Fron t Primar y Heate d
Oxyge n Senso r Heate r
Circuit Malfunctio n(Bank 2 , Senso r 1 )
Fron t Secondar y Heate d
Oxyge n Senso r Circui t
Lo w Voltag e
(Ban k 2 , Senso r 2 )
Fron t Secondar y Heate d
Oxygen Senso r Circui tHigh Voltag e
(Ban k 2 , Senso r 2 )
Fron t Secondar y Heate d
Oxyge n Senso r
Slo w Respons e
(Ban k 2 , Senso r 2 )
Fron t Secondar y Heate d
Oxyge n Senso r Heate r
Circui t Malfunctio n
(Ban k 2 , Senso r 2 )
Syste m To o Lea n
[Rea r Ban k (Ban k 1) ]
Syste m To o Ric h
[Rea r Ban k (Ban k 1) ] Probabl
e Caus e
• Shor t i n Rea r Secondar y HO2 S (Ban k 1 ,
Senso r 2 ) circui t
• Rea r Secondar y H02 S (Ban k 1 , Senso r 2 )
• EC M
• Ope n in Rea r Secondar y H02 S (Ban k 1 ,
Senso r 2 ) circui t
• Rea r Secondar y H02 S (Ban k 1 , Senso r 2 )
• EC M
• Rea r Secondar y HO2 S (Ban k 1 , Senso r 2 )
• Ope n o r shor t i n Rea r Secondar y HO2 S
(Ban k 1 , Senso r 2 ) heate r circui t
• EC M
• Shor t i n Fron t Primar y H02 S (Ban k 2 ,
Senso r 1 ) circui t
• Fron t Primar y HO2 S (Ban k 2 , Senso r 1 )
• Fue l suppl y syste m
• EC M
• Ope n in Fron t Primar y HO2 S (Ban k 2 ,
Senso r 1 ) circui t
• Fron t Primar y H02 S (Ban k 2 , Senso r 1 )
• EC M
• Fron t Primar y H02 S (Ban k 2 , Senso r 1 )
• Exhaus t syste m
• Ope n o r shor t i n Fron t Primar y H02 S
(Ban k 2 , Senso r 1 ) heate r circui t
• EC M
• Shor t i n Fron t Secondar y H02 S (Ban k 2 ,
Senso r 2 ) circui t
• Fron t Secondar y HO2 S (Ban k 2 , Senso r 2 )
• EC M
• Ope n i n Fron t Secondar y H02 S (Ban k 2 ,Senso r 2 ) circui t• Fron t Secondar y H02 S (Ban k 2 , Senso r 2 )• EC M
• Fron t Secondar y H02 S (Ban k 2 , Senso r 2 )
• Ope n o r shor t i n Fron t Secondar y H02 S
(Ban k 2 , Senso r 2 ) heate r circui t
• EC M
Fuel suppl y syste m
Rea r Primar y HO2 S (Ban k 1 , Senso r 1 )
MA P senso r
Contaminate d fue l
Valv e clearanc eExhaust leakag e
Fue l suppl y syste m
Rea r Primar y H02 S (Ban k 1 , Senso r 1 )
MA P senso r
Contaminate d fue l
Valv e clearanc e Pag
e
11-8 2
11-8 3
11-8 4
11-7 8
11-8 0
11-8 1
11-8 2
11-8 3
11-8 4
11-8 7
11-8 7
(cont' d
11-85 ('97-01)
11-32e ('02)
11-8 5 ('97-01)
11-32e ('02)
11-8 5 ('97-01)
11-32e ('02)
ProCarManuals.com

Troubleshooting
Diagnostic Troubl e Cod e (DTC ) Char t (cont'd )
DTC(MI L indication )
P0174 (45 )
P017 5 (45 )
P032 5 (53 )
P0330 (23 )
P0335 (4 )
P033 6 (4 )
P0401 (80 )
P0420 (68 )
P0430 (67 )
P0452 (91 )
P0453 (91 )
P0500 (17 )
P0505 (14 )
Detection Ite m
Syste m To o Lea n
[Fron t Ban k (Ban k 2) ]
Syste m To o Ric h
[Fron t Ban k (Ban k 2) ]
Rea r Knoc k Senso r (KS1 ) circui t
malfunctio n
Fron t Knoc k Senso r (KS2 ) circui t
malfunctio n
Crankshaf t Positio n
Senso r A Circui t
Low Inpu t
Crankshaf t Positio n
Senso r A
Range/Performanc e
Exhaust Ga sRecirculatio n
Insufficient Flo w Detecte d
Rea r Catalys t Syste m
Efficienc y Belo w
Threshol d
Fron t Catalys t Syste m
Efficienc y Belo w
Threshol d
Evaporativ e Emissio n Contro l
Syste m Pressur e Senso r (Fue l
Tan k Pressur e Sensor ) Circui t
Low Inpu t
Evaporativ e Emissio n Contro l
Syste m Pressur e Senso r (Fue l
Tan k Pressur e Sensor ) Circui t
High Inpu t
Vehicl e Spee d
Senso r Circui t
Low Inpu t
Idle Contro l
Syste m
Malfunctio n Probabl
e Caus e
• Fue l suppl y syste m
• Fron t Primar y H02 S (Ban k 2 , Senso r 1 )
• MA P senso r
• Contaminate d fue l
• Valv e clearanc e
• Exhaus t leakag e
• Fue l suppl y syste m
• Fron t Primar y HO2 S (Ban k 2 , Senso r 1 )
• MA P senso r
• Contaminate d fue l
• Valv e clearanc e
• Ope n o r shor t i n Rea r Knoc k Senso r
(KS1 ) circui t
• Rea r Knoc k Senso r (KS1 )
• EC M
• Ope n o r shor t i n Fron t Knoc k Senso r
(KS2 ) circui t
• Fron t Knoc k Senso r (KS2 )
• EC M
• Crankshaf t Positio n Senso r A
• Crankshaf t Positio n Senso r A circui t
•ECM
• Crankshaf t Positio n Senso r A
• Timin g bel t skippe d teet h
• EG R valv e
• EG R lin e
• Rea r Thre e Wa y Catalyti c converte r
• Rea r Secondar y HO2 S
• Fron t Thre e Wa y Catalyti c converte r
• Fron t Secondar y HO2 S
• Ope n o r shor t i n Fue l Tan k Pressur e
Senso r circui t
• Fue l Tan k Pressur e Senso r
• PC M
• Ope n in Fue l Tan k Pressur e Senso r
circui t
• Fue l Tan k Pressur e Senso r
• EC M
• Vehicl e Spee d Senso r
• Vehicl e Spee d Senso r circui t
•EC M
• Idl e spee d settin g
• Throttl e Bod y
Page
11-8 7
11-8 7
11-8 9
11-8 9
11-10 0
11-10 0
11-16 2
11-160
11-16 0
11-16 8
11-17 0
11-102
11-117
*: Th e indicato r ligh t an d th e Malfunctio n Indicato r Lam p (MIL ) ma y com e o n simultaneously .
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DTC(MI L indication )
P0700P071 5P0720P072 5 (70) *P0730P074 0P0753P075 8
P1106 (13 )
P110 7 (13 )
P110 8 (13 )
P112 8
(5 )
P1129 (5 )
P1201 7 1P1202 7 2
P120 3 7 3
P120 4 7 4
P120 5 7 5
P1206 7 6
P1241 (40 )
P1242 (40 )
P1243 (40 )
P1244 (40 )
P1246 (37 )
P1247 (37 )
P1248 (37 )
P1259 (52 )
Detection Ite m
Automati cTransaxle
Barometri cPressure Circui t
Range/Performanc e Proble m
Barometri cPressure Circui t
Lo w Inpu t
Barometri cPressure Circui t
Hig h Inpu t
Manifol d Absolut e Pressur e
Lowe r Tha n Expecte d
Manifol d Absolut e Pressur e
Highe r Tha n Expecte d
— Cylinde r 1
— Cylinde r 2
— Cylinde r 3
— Cylinde r 4
— Cylinde r 5
— Cylinde r 6
Misfir e Detecte d
Throttl e Valv e Contro l
Moto r Circui t 1
Malfunctio n
Throttl e Valv e Contro l
Motor Circui t 2Malfunctio n
Throttl e Positio n
Insufficien t
Close d Throttl e Positio n
Insufficien t
Accelerato r Positio n
Senso r 1 Circui t
Malfunctio n
Accelerato r Positio n
Senso r 2 Circui t
Malfunctio n
Accelerato r Positio n
Senso r 1 an d 2
Incorrec t Correlatio n
VTE C Syste m
Malfunctio n[Rear Ban k (Ban k 1) ]
Probabl e Caus e
• EC M (Bar o sensor )
• EC M (Bar o sensor )
• EC M (Bar o sensor )
• MA P senso r
• MA P senso r
Fue l injecto r
Fue l injecto r circui t
Ignitio n syste m
Lo w compressio n
Valve clearanc e
• Ope n o r shor t i n Throttl e Valv e Contro l
Moto r circui t 1
• Throttl e Valv e Contro l Moto r
•ECM
• Ope n o r shor t i n Throttl e Valv e Contro lMotor circui t 2• Throttl e Valv e Contro l Moto r•ECM
• Throttl e Valv e
• T P senso r
• Throttl e Valv e Contro l Moto r
• Throttl e Valv e
• T P senso r
• Ope n o r shor t i n Accelerato r Positio n
senso r 1 circui t
• Accelerato r Positio n senso r
•ECM
• Ope n o r shor t i n Accelerato r Positio n
senso r 2 circui t
• Accelerato r Positio n senso r
•ECM
• Accelerato r Positio n senso r
• Ope n o r shor t i n Rea r VTE C Solenoi d
Valve circui t• Rea r VTE C Solenoi d Valv e• Ope n o r shor t i n Rea r VTE C Pressur e
Switc h circui t
• Rea r VTE C Pressur e Switc h•ECM
Page
Sectio n 1 4
11-10 3
11-103
11-10 3
11-68
11-6 8
11-90
11-10 9
11-10 9
11-111
11-11 1
11-11 4
11-114
11-114
Sectio n 6
(cont'd )
ProCarManuals.com

DTC(MI L indication ) Detectio n Ite m
P127 9 (22 )
717 2
P130 0 7
374
7 5
76
P130 1 7 1
P1302 7 2
P130 3 7 3
P130 4 7 4
P130 5 7 5
P1306 7 6
P1316 (79 )
P131 7 (79 )
P131 8 (79 )
P131 9 (79 )
P1336 (54 )
P133 7 (54 )
P1381 (9 )
P1382 (9 )
P138 6 (59 )
P138 7 (59 )VTE
C Syste m
Malfunctio n
[Front Ban k (Ban k 2) ]
Rando m Misfir e
— Cylinde r 1
— Cylinde r 2
— Cylinder s
— Cylinde r 4
— Cylinde r 5
— Cylinde r 6
Misfir e
Detecte d
Spar k Plu g Voltag e
Detectio n Circui t
Malfunctio n
[Front Ban k (Ban k 2) ]
Spar k Plu g Voltag e
Detectio n Circui tMalfunctio n
[Rear Ban k (Ban k 1) ]
Spar k Plu g Voltag e
Detectio n Modul e Rese t
Circui t Malfunctio n
[Fron t Ban k (Ban k 2) ]
Spar k Plu g Voltag e
Detectio n Modul e Rese t
Circuit Malfunctio n
[Rear Ban k (Ban k 1) ]
Crankshaf t Positio n
Senso r B
Range/Performanc e
Crankshaft Positio n
Senso r B Circui t
Low Inpu t
Cylinde r Positio n
Sensor A
Intermitten t Interruptio n
Cylinder Positio n
Senso r A N o Signa l
Cylinde r Positio n
Senso r B
Intermitten t Interruptio n
Cylinder Positio n
Senso r B N o Signa l Probabl
e Caus e Pag e
• Ope n o r shor t i n Fron t VTE C Solenoi d
Valve circui t
• Fron t VTE C Solenoi d Valv e
• Ope n o r shor t i n Fron t VTE C Pressur e
Switc h circui t
• Fron t VTE C Pressur e Switc h
• EC M
• Ignitio n syste m
• Fue l suppl y syste m
• MA P senso r
• EG R syste m
• Contaminate d fue l
• Lac k o f fue l
• Ignitio n syste m
• Ope n o r shor t i n Spar k Plu g Voltag e
Detectio n Modul e circui t
• Spar k Plu g Voltag e Detectio n Modul e
•EC M
• Ope n o r shor t i n Spar k Plu g Voltag e
Detectio n Modul e circui t
• Spar k Plu g Voltag e Detectio n Modul e• EC M
• Ope n o r shor t i n Spar k Plu g Voltag e
Detectio n Modul e Rese t circui t
• Spar k Plu g Voltag e Detectio n Modul e
• EC M
• Ope n o r shor t i n Spar k Plu g Voltag e
Detectio n Modul e Rese t circui t
• Spar k Plu g Voltag e Detectio n Modul e
•EC M
• Crankshaf t Positio n Senso r B
• Timin g bel t skippe d teet h
• Crankshaf t Positio n Senso r B
• Crankshaf t Positio n Senso r B circui t
•ECM
• Cylinde r Positio n Senso r A
• Cylinde r Positio n Senso r A
• Cylinde r Positio n Senso r A circui t
• EC M
• Cylinde r Positio n Senso r B
• Cylinde r Positio n Senso r B
• Cylinde r Positio n Senso r B circui t
• EC M
Sectio n 6
11-9 4
11-90
11-9 6
11-96
11-9 8
11-98
11-10 0
11-10 0
11-10 0
11-10 0
11-10 0
11-10 0
Troubleshootin g
Diagnostic Troubl e Cod e (DTC ) Char t (cont'd )
or
P0300
ProCarManuals.com

DTC(MI L indication )
P1456 (90)* *
P145 7 (90)* *
P1491 (12 )
P1498 (12 )
PI 60 7 (- )
P1608 (- )
P1671 (31 )
P1672 (31 )
P167 6 (35 )
P167 7 (35 )
P1705P1706
P175 3
P175 8P1768
P178 8 (70) *
P179 0
P1791
P179 2
P179 3
P179 5
Detectio n Ite m
Evaporativ e Emissio n Contro l
Syste m Lea k Detecte d (Fue l Tan k
Area )
Evaporativ e Emissio n Contro l
Syste m Lea k Detecte d (EVA P
Contro l Caniste r Area )
EGR Valv e
Lift Insufficien tDetected
EGR Valv eLift Senso r
Hig h Voltag e
Engin e Contro l
Modul e Interna l
Circui t Failur e A
Engin e Contro l
Modul e Interna l
Circui t Failur e 8
A/TF I
Dat a Lin e
N o Signa l
A/TF I
Dat a Lin e
Failur e
TCSF I
Data Lin e
N o Signa l
TCSFI
Data Lin e
Failur e
Automati c
Transaxle
Probable Caus e
• Vacuu m connectio n
• Fue l tan k
• Fue l tan k pressur e senso r
• Fuel fill ca p• EVA P bypas s solenoi d valv e
• EVA P tw o wa y valv e
• EVA P contro l caniste r ven t shu t valv e
• EVA P contro l caniste r
• EVA P purg e contro l solenoi d valv e
• Vacuu m connectio n
• EVA P contro l caniste r
• Fue l tan k pressur e senso r
• EVA P bypas s solenoi d valv e
• EVA P tw o wa y valv e
• EVA P contro l caniste r ven t shu t valv e
• Fue l Tan k
• EVA P purg e contro l solenoi d valv e
• EG R valv e (wit h lif t sensor )
• EG R valv e lif t senso r circui t
• EG R contro l solenoi d valv e
• EG R contro l solenoi d valv e circui t
• EG R lin e•EC M
• EG R valv e (wit h lif t sensor )
• EG R valv e lif t senso r circui t
• EC M
•EC M
• EC M
• A/ T F l Dat a Lin e
•TC M
• EC M
• A/ T F l Dat a Lin e
•TC M
• EC M
• TC S F l Dat a Lin e
• TC S Contro l Uni t• EC M
• TC S F l Dat a Lin e• TC S Contro l Uni t
•EC M Pag
e
11-172 ('97-99)
11-172 ('97-99)
11-163
11-16 5
11-10 4
11-10 4
11-105
11-10 5
Sectio n 1 9
Sectio n 1 9
Sectio n 1 4
*: Th e indicato r ligh t an d th e Malfunctio n Indicato r Lam p (MIL ) ma y com e o n simultaneously .
11-60c ('00-02)
11-65c ('01-02)
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Troubleshooting

How to Read Flowcharts

A flowchart is designed to be used from start to final repair. It's like a map showing you the shortest distance. But beware:

if you go off the "map" anywhere but a "stop" symbol, you can easily get lost.

Describes the conditions or situation to start a troubleshooting flowchart.

Asks you to do something; perform a test, set up a condition etc.

Asks you about the result of an action, then sends you in the appropriate troubleshooting direction.

NOTE:

The term "Intermittent Failure" is used in these charts. It simply means a system may have had a failure, but it checks

out OK at this time. If the Malfunction Indicator Lamp (MIL) on the dash does not come on, check for poor connections

or loose wires at all connectors related to the circuit that you are troubleshooting (see illustration below).

Some of the troubleshooting flowcharts have you reset the Engine Control Module (ECM) and try to duplicate the

Diagnostic Trouble Code (DTC). If the problem is intermittent and you can't duplicate the code, do not continue through

the flowchart. To do so will only result in confusion and, possibly, a needlessly replaced ECM.

"Open" and "Short" are common electrical terms. An open is a break in a wire or at a connection. A short is an acci-

dental connection of a wire to ground or to another wire. In simple electronics, this usually means something won't

work at all. In complex electronics (like ECM's), this can sometimes mean something works, but not the way it's sup-

posed to.

TIGHT

LOOSE
The end of a series of actions and decisions, describes a final repair action and sometimes directs you to

an earlier part of the flowchart to confirm your repair.ProCarManuals.com