2004 INFINITI FX35 Service Manual

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Page 1521 of 4449

INFINITI FX35 2004 Service Manual EC-180
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0112, P0113 IAT SENSORPFP:22630
Component DescriptionABS006MG
The intake air temperature sensor is built-into ma

Page 1522 of 4449

INFINITI FX35 2004 Service Manual DTC P0112, P0113 IAT SENSOR
EC-181
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EC
Revision: 2004 November 2004 FX35/FX45
WITH GST
Follow the procedure “WITH CONSULT-II” above.

Page 1523 of 4449

INFINITI FX35 2004 Service Manual EC-182
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006MJ
TBWM0288E

Page 1524 of 4449

INFINITI FX35 2004 Service Manual DTC P0112, P0113 IAT SENSOR
EC-183
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS00CGR
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Lo

Page 1525 of 4449

INFINITI FX35 2004 Service Manual EC-184
[VQ35DE]
DTC P0112, P0113 IAT SENSOR
Revision: 2004 November 2004 FX35/FX45
4. CHECK INTAKE AIR TEMPERATURE SENSOR
Refer to EC-184, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Repla

Page 1526 of 4449

INFINITI FX35 2004 Service Manual DTC P0117, P0118 ECT SENSOR
EC-185
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Revision: 2004 November 2004 FX35/FX45
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionABS006MN
The engine coolant tempe

DTC P0117, P0118 ECT SENSOR
EC-185
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Revision: 2004 November 2004 FX35/FX45
DTC P0117, P0118 ECT SENSORPFP:22630
Component DescriptionABS006MN
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.

*: This data is reference value and is 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 damage to the ECM's transistor. Use a ground other than ECM termi-
nals, such as the ground.
On Board Diagnosis LogicABS006MO
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 kΩ
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
NameDTC Detecting Condition Possible Cause
P0117
0117Engine coolant tem-
perature sensor cir-
cuit 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 tem-
perature sensor cir-
cuit 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 1527 of 4449

INFINITI FX35 2004 Service Manual EC-186
[VQ35DE]
DTC P0117, P0118 ECT SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006MP
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ign

Page 1528 of 4449

INFINITI FX35 2004 Service Manual DTC P0117, P0118 ECT SENSOR
EC-187
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Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006MQ
TBWM0289E

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