2003 NISSAN ALMERA N16 Electronic Repair Manual

display engine oil fuel pressure radiator cap charging high beam

Page 825 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0102, P0103 MAF SENSOR
EC-495
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionEBS00KFH
The mass air flow sensor is placed in the stream

DTC P0102, P0103 MAF SENSOR
EC-495
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0102, P0103 MAF SENSORPFP:22680
Component DescriptionEBS00KFH
The mass air flow sensor is placed in the stream of intake air. It mea-
sures the intake flow rate by measuring a part of the entire intake
flow. It consists of a hot film that is supplied with electric current from
the ECM. The temperature of the hot film is controlled by the ECM a
certain amount. The heat generated by the hot film is reduced as the
intake air flows around it. The more air, the greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot film as air flow increases. The ECM
detects the air flow by means of this current change.
CONSULT-II Reference Value in Data Monitor ModeEBS00KFI
Specification data are reference values.
On Board Diagnosis LogicEBS00KFJ
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEC266C
MONITOR ITEM CONDITION SPECIFICATION
MAS A/F SE-B1
●Engine: After warming up
●Air conditioner switch: OFF
●Shift lever:
N (A/T models)
Neutral (M/T models)
●No-loadIdle Approx. 1.0 - 1.7V
2,500 rpm Approx. 1.5 - 2.1V
CAL/LD VALUE
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW
●Engine: After warming up
●Shift lever:
N (A/T models)
Neutral (M/T models)
●Air conditioner switch: OFF
●No-loadIdle 1.0 - 4.0 g·m/s
2,500 rpm 5.0 - 10.0 g·m/s
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0102
0102Mass air flow sensor circuit
low inputAn excessively low voltage from the sensor
is sent to ECM when engine is running.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Intake air leaks
●Mass air flow sensor
P0103
0103Mass air flow sensor circuit
high inputAn excessively high voltage from the sensor
is sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Mass air flow sensor
Detected items Engine operating condition in fail-safe mode
Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

Page 826 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-496
[QG (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
DTC Confirmation Procedure
EBS00KFK
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “O

Page 827 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0102, P0103 MAF SENSOR
EC-497
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00KFL
YEC278A

Page 828 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-498
[QG (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when meas

Page 829 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0102, P0103 MAF SENSOR
EC-499
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1. Disconnect MAF sensor harness connector.
2. Turn ignition switch “ON�

Page 830 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-500
[QG (WITHOUT EURO-OBD)]
DTC P0102, P0103 MAF SENSOR
7. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between MAF sensor terminal 1 and ECM terminal 50.
Re

Page 831 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0117, P0118 ECT SENSOR
EC-501
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00KFP
The engine coolant temperature sensor is used to

DTC P0117, P0118 ECT SENSOR
EC-501
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionEBS00KFP
The engine coolant temperature sensor is used to detect the engine
coolant temperature. The sensor modifies a voltage signal from the
ECM. The modified signal returns to the ECM as the engine coolant
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

*: These data are reference values and are measured between ECM terminal 72
(Engine coolant temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS00KFQ
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When this malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
SEF594K
Engine coolant
temperature°C (°F)Voltage* V Resistance kΩ
−10 (14) 4.4 7.0 - 11.4
20 (68) 3.5 2.1 - 2.9
50 (122) 2.2 0.68 - 1.00
90 (194) 0.9 0.236 - 0.260
SEF012P
DTC No. Trouble Diagnosis Name DTC Detecting Condition Possible Cause
P0117
0117Engine coolant temperature
sensor circuit low inputAn excessively low voltage from the sensor is
sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Engine coolant temperature sensor P0118
0118Engine coolant temperature
sensor circuit high inputAn excessively high voltage from the sensor is
sent to ECM.
Detected items Engine operating condition in fail-safe mode
Engine coolant temper-
ature sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning ignition switch “ON”
or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or Start 40°C (104°F)
More than approx. 4 minutes after ignition ON or
Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.

Page 832 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual EC-502
[QG (WITHOUT EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00KFR
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “O

Load next 8 pages

Page: < prev 1-10 ... 793-800 801-808 809-816 817-824 825-832 833-840 841-848 849-856 857-864 ... 3192 next >

clutch engine oil capacity phone trip computer trunk release jump start terminals