Infiniti M35/M45 Y50. Manual - part 582
TROUBLE DIAGNOSIS
EC-801
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Symptom Matrix Chart
NBS005AH
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO ST
AR
T/REST
AR
T
(
EXCP
.
HA)
ENGINE ST
AL
L
HESIT
A
TI
ON/SURGI
N
G/FL
A
T SPOT
SP
ARK KNOCK/
DET
O
NA
TION
L
A
CK OF POW
E
R/POOR
A
C
CE
L
E
RA
TI
ON
HIGH IDL
E
/L
OW
IDL
E
ROUGH IDL
E
/HUNTIN
G
IDLING
VIBRA
T
IO
N
SL
OW
/NO
RETURN T
O
IDL
E
OVERHEA
T
S/W
A
TER T
E
M
P
ERA
T
U
R
E
HIGH
EXCESSIVE FUEL CONSUM
P
T
ION
EXCESSIVE OI
L
CONSUM
P
T
IO
N
BA
TTER
Y
DEAD (UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
Fuel
Fuel pump circuit
1
1
2
3
2
2
2
3
2
Fuel pressure regulator system
3
3
4
4
4
4
4
4
4
4
Fuel injector circuit
1
1
2
3
2
2
2
2
Evaporative emission system
3
3
4
4
4
4
4
4
4
4
Air
Positive crankcase ventilation sys-
tem
3
3
4
4
4
4
4
4
4
4
1
Incorrect idle speed adjustment
1
1
1
1
1
Electric throttle control actuator
1
1
2
3
3
2
2
2
2
2
2
,
Ignition
Incorrect ignition timing adjustment
3
3
1
1
1
1
1
1
Ignition circuit
1
1
2
2
2
2
2
2
Main power supply and ground circuit
2
2
3
3
3
3
3
2
3
Mass air flow sensor circuit
1
1
2
2
2
2
2
2
Engine coolant temperature sensor circuit
3
3
3
Air fuel ratio (A/F) sensor 1 circuit
Throttle position sensor circuit
2
2
,
,
,
Accelerator pedal position sensor circuit
3
2
1
,
,
Knock sensor circuit
2
3
Crankshaft position sensor (POS) circuit
2
2
Camshaft position sensor (PHASE) circuit
3
2
Vehicle speed signal circuit
2
3
3
3
Power steering pressure sensor circuit
2
3
3