Infiniti F50. Manual — part 392
DTC P0127 IAT SENSOR
EC-209
C
D
E
F
G
H
I
J
K
L
M
A
EC
Component Inspection
EBS00LYR
INTAKE AIR TEMPERATURE SENSOR
1.
Check resistance between intake air temperature sensor termi-
nals 3 and 5 under the following conditions.
<Reference data>
2.
If NG, replace mass air flow sensor (with intake air temperature
sensor).
Removal and Installation
EBS00LYS
MASS AIR FLOW SENSOR
Refer to
EM-15, "AIR CLEANER AND AIR DUCT"
.
SEC266C
Intake air temperature
°
C (
°
F)
Resistance k
Ω
25 (77)
1.9 - 2.1
SEF012P
EC-210
DTC P0128 THERMOSTAT FUNCTION
DTC P0128 THERMOSTAT FUNCTION
PFP:21200
On Board Diagnosis Logic
EBS00LYT
Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long
enough.
This is due to a leak in the seal or the thermostat stuck open.
DTC Confirmation Procedure
EBS00LYU
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
●
For best results, perform at ambient temperature of –10
°
C (14
°
F) or higher.
●
For best results, perform at engine coolant temperature of –10
°
C (14
°
F) to 60
°
C (140
°
F).
WITH CONSULT-II
1.
Replace thermostat with new one. Refer to
CO-24, "THERMOSTAT AND WATER CONTROL VALVE"
.
Use only a genuine NISSAN thermostat as a replacement. If an incorrect thermostat is used, the MIL may
come on.
2.
Turn ignition switch “ON”.
3.
Select “COOLAN TEMP/S” in “DATA MONITOR” mode with
CONSULT-II.
4.
Check that the “COOLAN TEMP/S” is above 60
°
C (140
°
F).
If it is below 60
°
C (140
°
F), go to following step.
If it is above 60
°
C (140
°
F), stop engine and cool down the
engine to less than 60
°
C (140
°
F), then retry from step 1.
5.
Drive vehicle for 10 consecutive minutes under the following
conditions.
If 1st trip DTC is detected, go to
EC-210, "Diagnostic Procedure"
.
WITH GST
1.
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
EBS00LYV
1.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to
EC-211, "Component Inspection"
OK or NG
OK
>> INSPECTION END
NG
>> Replace engine coolant temperature sensor.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0128
0128
Thermostat function
The engine coolant temperature does not
reach to specified temperature even though
the engine has run long enough.
●
Thermostat
●
Leakage from sealing portion of thermostat
●
Engine coolant temperature sensor
VHCL SPEED SE
80 - 120 km/h (50 - 75 MPH)
PBIB1917E
DTC P0128 THERMOSTAT FUNCTION
EC-211
C
D
E
F
G
H
I
J
K
L
M
A
EC
Component Inspection
EBS00LYW
ENGINE COOLANT TEMPERATURE SENSOR
Check resistance as shown in the figure.
<Reference data>
If NG, replace engine coolant temperature sensor.
Removal and Installation
EBS00LYX
ENGINE COOLANT TEMPERATURE SENSOR
Refer to
.
PBIB2005E
Temperature
°
C (
°
F)
Resistance k
Ω
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.0
90 (194)
0.236 - 0.260
SEF012P
EC-212
DTC P0132, P0152 HO2S1
DTC P0132, P0152 HO2S1
PFP:22690
Component Description
EBS00LYY
The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1 to 0V.
CONSULT-II Reference Value in Data Monitor Mode
EBS00LYZ
Specification data are reference values.
On Board Diagnosis Logic
EBS00LZ0
To judge the malfunction, the diagnosis checks that the heated oxy-
gen sensor 1 output is not inordinately high.
SEF463R
SEF288D
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
0 - 0.3V
←→
Approx. 0.6 - 1.0V
HO2S1 MNTR (B1)
HO2S1 MNTR (B2)
●
Engine: After warming up
Maintaining engine speed at 2,000 rpm
LEAN
←→
RICH
Changes more than 5 times during
10 seconds.
SEF301UA
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0132
0132
(Bank 1)
Heated oxygen sensor 1
circuit high voltage
An excessively high voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted)
●
Heated oxygen sensor 1
P0152
0152
(Bank 2)
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