2007 INFINITI M35 Factory Service Manual

differential trailer coolant level trunk rear entertainment fuses

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INFINITI M35 2007 Factory Service Manual EC-944
[VK45DE]
DTC P0127 IAT SENSOR
Revision: 2007 April2007 M35/M45
Component InspectionNBS005DI
INTAKE AIR TEMPERATURE SENSOR
1. Check resistance between mass air flow sensor (1) terminals 5
and 6

Page 2474 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0128 THERMOSTAT FUNCTION
EC-945
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Revision: 2007 April2007 M35/M45
DTC P0128 THERMOSTAT FUNCTIONPFP:21200
On Board Diagnosis LogicNBS005DK
Engine coolant temperat

DTC P0128 THERMOSTAT FUNCTION
EC-945
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Revision: 2007 April2007 M35/M45
DTC P0128 THERMOSTAT FUNCTIONPFP:21200
On Board Diagnosis LogicNBS005DK
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 ProcedureNBS005DL
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-55, "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), 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-945, "
Diagnostic Procedure"
.
WITH GST
1. Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureNBS005DM
1. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-946, "
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
0128Thermostat functionThe 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)
SEF176Y

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INFINITI M35 2007 Factory Service Manual EC-946
[VK45DE]
DTC P0128 THERMOSTAT FUNCTION
Revision: 2007 April2007 M35/M45
Component InspectionNBS005DN
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine coolant temperature sen

Page 2476 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0130, P0150 A/F SENSOR 1
EC-947
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Revision: 2007 April2007 M35/M45
DTC P0130, P0150 A/F SENSOR 1PFP:22693
Component DescriptionNBS005DP
The air fuel ratio (A/F) s

DTC P0130, P0150 A/F SENSOR 1
EC-947
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Revision: 2007 April2007 M35/M45
DTC P0130, P0150 A/F SENSOR 1PFP:22693
Component DescriptionNBS005DP
The air fuel ratio (A/F) sensor 1 is a planar dual-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is the combination of a
Nernst concentration cell (sensor cell) with an oxygen-pump cell,
which transports ions. It has a heater in the element.
The sensor is capable of precise measurement = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide range (0.7 <
< air).
The exhaust gas components diffuse through the diffusion gap at the
electrode of the oxygen pump and Nernst concentration cell, where
they are brought to thermodynamic balance.
An electronic circuit controls the pump current through the oxygen-
pump cell so that the composition of the exhaust gas in the diffusion
gap remains constant at = 1. Therefore, the A/F sensor 1 is able to
indicate air/fuel ratio by this pumping of current. In addition, a heater
is integrated in the sensor to ensure the required operating tempera-
ture of 700 - 800°C (1,292 - 1,472°F).
CONSULT-II Reference Value in Data Monitor ModeNBS005DQ
Specification data are reference values.
On Board Diagnosis LogicNBS005DR
To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1
signal fluctuates according to fuel feedback control.
DTC Confirmation ProcedureNBS005DS
Perform PROCEDURE FOR MALFUNCTION A first.
If the DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
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:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
PROCEDURE FOR MALFUNCTION A
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
SEF579Z
SEF580Z
MONITOR ITEM CONDITION SPECIFICATION
A/F SEN1 (B1)
A/F SEN1 (B2)
Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 1.5 V
DTC No. Trouble diagnosis name DTC detecting condition Possible Cause
P0130
0130
(Bank 1)
Air fuel ratio (A/F) sensor
1 circuitA)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly in the range other
than approx. 1.5V.
Harness or connectors
[Air fuel ratio (A/F) sensor 1 circuit
is open or shorted.]
Air fuel ratio (A/F) sensor 1 P0150
0150
(Bank 2)B)The A/F signal computed by ECM from the A/F
sensor 1 signal is constantly approx. 1.5V.

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INFINITI M35 2007 Factory Service Manual EC-948
[VK45DE]
DTC P0130, P0150 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Let engine idle for 2 minutes.
4. If 1st trip DTC is detected, go t

Page 2478 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0130, P0150 A/F SENSOR 1
EC-949
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Revision: 2007 April2007 M35/M45
8. Make sure that “TESTING” changes to “COMPLETED”.
If “TESTING” changed to “OUT

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INFINITI M35 2007 Factory Service Manual EC-950
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DTC P0130, P0150 A/F SENSOR 1
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS005DU
BANK 1
TBWT1046E

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INFINITI M35 2007 Factory Service Manual DTC P0130, P0150 A/F SENSOR 1
EC-951
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Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
Puls

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