Infiniti F50. Manual — part 383
DTC P0101 MAF SENSOR
EC-173
C
D
E
F
G
H
I
J
K
L
M
A
EC
7.
Maintain the following conditions for at least 10 consecutive sec-
onds.
8.
EC-175, "Diagnostic Procedure"
.
Overall Function Check
EBS00LXG
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the mass air flow sensor circuit. During this check, a DTC
might not be confirmed.
With GST
1.
Start engine and warm it up to normal operating temperature.
2.
Select “MODE 1” with GST.
3.
Check the mass air flow sensor signal with “MODE 1”.
4.
Check for linear mass air flow sensor signal value rise in
response to increases to about 4,000 rpm in engine speed.
5.
EC-175, "Diagnostic Procedure"
ENG SPEED
More than 2,000 rpm
THRTL SEN 1
More than 3V
THRTL SEN 2
More than 3V
Selector lever
Suitable position
Driving location
Driving vehicle uphill (Increased engine load) will help
maintain the driving conditions required for this test.
PBIB0199E
SEF534P
EC-174
DTC P0101 MAF SENSOR
Wiring Diagram
EBS00LXH
TBWM0142E
DTC P0101 MAF SENSOR
EC-175
C
D
E
F
G
H
I
J
K
L
M
A
EC
Specification data are reference values and are measured between each terminal 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.
Diagnostic Procedure
EBS00LXI
1.
INSPECTION START
Which malfunction (A or B) is duplicated?
A or B
A
>> GO TO 3.
B
>> GO TO 2.
2.
CHECK INTAKE SYSTEM
Check the following for connection.
●
Air duct
●
Vacuum hoses
●
Intake air passage between air duct and intake manifold
OK or NG
OK
>> GO TO 3.
NG
>> Reconnect the parts.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
42
W/B
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch “OFF”]
●
For a few seconds after turning ignition
switch “OFF”
0 - 1.0V
[Ignition switch “OFF”]
●
More than a few seconds passed after turn-
ing ignition switch “OFF”
BATTERY VOLTAGE
(11 - 14V)
91
B/Y
Mass air flow sensor
[Engine is running]
●
Warm-up condition
●
Idle speed
1.1 - 1.5V
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,500 rpm.
1.7 - 2.4V
103
L
Sensor power supply
[Ignition switch “ON”]
Approximately 5V
109
LG
Mass air flow sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
163
166
R
R
Power supply for ECM
[Ignition switch “ON”]
BATTERY VOLTAGE
(11 - 14V)
EC-176
DTC P0101 MAF SENSOR
3.
RETIGHTEN GROUND SCREWS
1.
Turn ignition switch “OFF”.
2.
Loosen and retighten engine ground screws.
>> GO TO 4.
4.
CHECK MAF SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect mass air flow (MAF) sensor harness connector.
2.
Turn ignition switch “ON”.
3.
Check voltage between MAF sensor terminals 2, 4 and ground
with CONSULT-II or tester.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M135, F105
●
Harness for open or short between mass air flow sensor and ECM relay
●
Harness for open or short between mass air flow sensor and ECM
>> Repair harness or connectors.
PBIB0011E
PBIB0012E
Terminal
Voltage
2
Approximately 5V
4
Battery voltage
PBIB0076E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст