2006 INFINITI FX35 Service Manual

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Page 2257 of 4462

INFINITI FX35 2006 Service Manual DTC P0102, P0103 MAF SENSOR EC-873
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EC
Revision: 2006 December 2006 FX35/FX45
a. Check for the cause of uneven air flow through mass air flow sensor. Refer

Page 2258 of 4462

INFINITI FX35 2006 Service Manual EC-874
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DTC P0112, P0113 IAT SENSOR
Revision: 2006 December 2006 FX35/FX45
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionNBS0043T
The intake air temperature sensor is built-into ma

Page 2259 of 4462

INFINITI FX35 2006 Service Manual DTC P0112, P0113 IAT SENSOR EC-875
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Revision: 2006 December 2006 FX35/FX45
WITH GST
Follow the procedure “WITH CONSULT-II” above.

Page 2260 of 4462

INFINITI FX35 2006 Service Manual EC-876
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DTC P0112, P0113 IAT SENSOR
Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS0043W
TBWM0723E

Page 2261 of 4462

INFINITI FX35 2006 Service Manual DTC P0112, P0113 IAT SENSOR EC-877
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNBS0043X
1. CHECK GROUND CONNECTIONS
1. Turn ignition swi

Page 2262 of 4462

INFINITI FX35 2006 Service Manual EC-878
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DTC P0112, P0113 IAT SENSOR
Revision: 2006 December 2006 FX35/FX45
3. CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect

Page 2263 of 4462

INFINITI FX35 2006 Service Manual DTC P0117, P0118 ECT SENSOR EC-879
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Revision: 2006 December 2006 FX35/FX45
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionNBS00440
The engine

DTC P0117, P0118 ECT SENSOR EC-879
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Revision: 2006 December 2006 FX35/FX45
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionNBS00440
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 73
(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 LogicNBS00441
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 MIL lights up.
SEF594K
Engine coolant temperature
° C ( °F) Voltage* V Resistance k
Ω
–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
0117 Engine coolant tem-
perature sensor cir-
cuit low input An 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
0118 Engine coolant tem-
perature sensor cir-
cuit high input An excessively high voltage from the sensor is
sent to ECM.
Detected items Engine operating condition in fail-safe mode
Engine coolant temper- ature sensor circuit Engine 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.
Condition Engine 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 START 80 °C (176 °F)
Except as shown above 40 - 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 2264 of 4462

INFINITI FX35 2006 Service Manual EC-880
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DTC P0117, P0118 ECT SENSOR
Revision: 2006 December 2006 FX35/FX45
DTC Confirmation ProcedureNBS00442
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ig

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