Nissan Frontier D22. Instruction — part 245
TROUBLE DIAGNOSIS
EC-83
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
17.
ADJUSTMENT THROTTLE POSITION SENSOR IDLE POSITION-3
Without CONSULT-II
1.
Temporarily tighten sensor body fixing bolts as follows.
–
Gradually move the sensor body clockwise and stop it
when the continuity comes to exist, then tighten sensor
body fixing bolts.
2.
Make sure two or three times that the continuity exists when the
throttle valve is closed and continuity does not exist when it is
opened.
3.
Remove 0.1 mm (0.004 in) feeler gauge then insert 0.3 mm
(0.012 in) feeler gauge.
4.
Make sure two or three times that continuity does not exist when
the throttle valve is closed.
5.
Tighten throttle position sensor.
6.
Check the continuity again.
Continuity does not exist while closing the throttle valve.
OK or NG
OK
>> GO TO 18.
NG
>> GO TO 15.
18.
REINSTALLATION
Without CONSULT-II
1.
Remove 0.3 mm (0.012 in) feeler gauge.
2.
Reconnect throttle position sensor harness connector and closed throttle position switch harness connec-
tor.
3.
Rev engine (2,000 to 3,000 rpm) two or three times under no-load and then run engine at idle speed.
>> GO TO 19.
19.
RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
Without CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor
idle position memory will not be reset correctly.
1.
Start engine.
2.
Warm up engine to normal operating temperature.
3.
Stop engine. (Turn ignition switch OFF.)
4.
Turn ignition switch ON and wait at least 5 seconds.
5.
Turn ignition switch OFF and wait at least 5 seconds.
6.
Repeat steps 4 and 5 for 20 times.
>> GO TO 20.
AEC872A
SEF864V
EC-84
[KA24DE]
TROUBLE DIAGNOSIS
20.
CHECK TARGET IDLE SPEED
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Check idle speed.
OK or NG
OK
>> GO TO 21.
NG
>> 1. Adjust target idle speed. Refer to
EC-36, "Idle Speed/Ignition Timing/Idle Mixture Ratio Adjust-
2. GO TO 21.
21.
ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM and TCM.
Refer to
EC-61, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"
>> INSPECTION END
Symptom Matrix Chart
UBS00D1G
SYSTEM — ENGINE CONTROL SYSTEM
800
±50 rpm (in P or N position)
SYMPTOM
Refer-
ence
page
HARD/NO
ST
AR
T/R
E
ST
AR
T (
EXCP
. HA)
ENGINE ST
AL
L
HESIT
A
T
ION/SURGI
N
G/FL
A
T SPOT
SP
ARK KNOCK/
DET
O
NA
TIO
N
L
A
CK OF POW
E
R/POOR
ACCEL
E
RA
TI
ON
HIG
H
IDL
E
/L
OW
IDL
E
ROUGH IDL
E
/HUNTI
N
G
IDLI
NG VIBRA
T
IO
N
SL
OW
/N
O RETURN T
O
IDL
E
OVERHEA
T
S/W
A
TER TE
M
PERA
T
URE
HIG
H
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
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
system
3
3
4
4
4
4
4
4
4
4
1
Incorrect idle speed adjustment
3
3
1
1
1
1
1
IACV-AAC valve circuit
1
1
2
3
3
2
2
2
2
2
2
,
IACV-FICD solenoid valve circuit
2
2
3
3
3
3
3
3
3
3
TROUBLE DIAGNOSIS
EC-85
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
Ignition
Incorrect ignition timing adjust-
ment
3
3
1
1
1
1
1
1
Ignition circuit
1
1
2
2
2
2
2
2
EGR
EGRC-solenoid valve circuit
2
2
3
3
3
EGR system
2
1
2
3
3
3
2
2
3
3
,
Main power supply and ground circuit
2
2
3
3
3
3
3
2
3
2
Air conditioner circuit
2
2
3
3
3
3
3
3
3
3
2
Camshaft position sensor circuit
2
2
3
3
3
3
3
3
Mass air flow sensor circuit
1
1
2
2
2
2
2
2
Heated oxygen sensor 1 circuit
1
2
3
2
2
2
2
,
,
,
Engine coolant temperature sensor circuit
1
1
2
3
2
3
2
2
3
2
Throttle position sensor circuit
1
2
2
2
2
2
2
2
Incorrect throttle position sensor adjust-
ment
3
1
1
1
1
1
1
1
Vehicle speed sensor circuit
2
3
3
3
Knock sensor circuit
2
3
ECM
2
2
3
3
3
3
3
3
3
3
3
Start signal circuit
2
PNP switch circuit
3
3
3
3
3
Power steering oil pressure switch circuit
2
3
3
SYMPTOM
Refer-
ence
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
C
K
OF POW
E
R/POOR ACC
E
L
E
RA
TI
ON
HIGH IDL
E
/L
OW
IDL
E
ROUGH IDL
E
/HUNTING
IDLING
VIBRA
T
IO
N
SL
O
W
/NO RETURN
T
O
IDL
E
OVERHEA
T
S/W
A
TER TEMPERA
T
UR
E
HIGH
EXCESS
IVE FUEL CONSUM
P
T
ION
EXCESS
IVE 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
EC-86
[KA24DE]
TROUBLE DIAGNOSIS
SYSTEM — ENGINE MECHANICAL & OTHER
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
SYMPTOM
Reference
page
HARD/NO ST
AR
T/REST
AR
T (
EXCP
. HA)
ENGINE ST
ALL
HESIT
A
TIO
N
/SURGING
/FL
A
T
SPOT
SP
ARK KNOCK/DET
O
NA
TION
L
A
CK
OF POW
E
R/
POOR ACCEL
E
RA
TIO
N
HIGH IDL
E
/L
OW
IDL
E
ROUGH I
D
L
E
/HUNTING
IDLING VIBRA
T
IO
N
SL
OW
/NO RETURN
T
O
IDL
E
OVERHEA
T
S/W
A
TER TEMPERA
T
URE
HIGH
EXCE
SSI
VE FUEL CONSUM
P
T
IO
N
EXCE
SSI
VE OIL
CONSUM
P
T
ION
BA
TT
ER
Y DEAD (
UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF
AG
AH
AJ
AK
AL
AM
HA
Fuel
Fuel tank
5
5
Fuel piping
5
5
5
5
5
5
—
Vapor lock
Valve deposit
5
5
5
5
5
5
5
Poor fuel (Heavy weight gaso-
line, Low octane)
Air
Air duct
5
5
5
5
5
5
Air cleaner
Air leakage from air duct
(Mass air flow sensor — throt-
tle body)
5
5
5
5
Throttle body, Throttle wire
Air leakage from intake mani-
fold/Collector/Gasket
—
Crank-
ing
Battery
1
1
1
1
1
1
1
1
Alternator circuit
Starter circuit
3
Flywheel/Drive plate
6
PNP switch
4
—
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