2004 INFINITI FX35 Service Manual

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Page 1529 of 4449

INFINITI FX35 2004 Service Manual EC-188
[VQ35DE]
DTC P0117, P0118 ECT SENSOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS00CGS
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground

Page 1530 of 4449

INFINITI FX35 2004 Service Manual DTC P0117, P0118 ECT SENSOR
EC-189
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
3. CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disco

Page 1531 of 4449

INFINITI FX35 2004 Service Manual EC-190
[VQ35DE]
DTC P0122, P0123 TP SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0122, P0123 TP SENSORPFP:16119
Component DescriptionABS00CGT
Electric throttle control actuator consists of throt

EC-190
[VQ35DE]
DTC P0122, P0123 TP SENSOR
Revision: 2004 November 2004 FX35/FX45
DTC P0122, P0123 TP SENSORPFP:16119
Component DescriptionABS00CGT
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
CONSULT-II Reference Value in Data Monitor ModeABS00CGU
Specification data are reference values.
*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.
On Board Diagnosis LogicABS00CGV
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB0145E
MONITOR ITEM CONDITION SPECIFICATION
THRTL SEN1
THRTL SEN2*
Ignition switch: ON
(Engine stopped)
Shift lever: DAccelerator pedal: Fully released More than 0.36V
Accelerator pedal: Fully depressed Less than 4.75V
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122
0122Throttle position sensor
2 circuit low inputAn excessively low voltage from the TP sensor
2 is sent to ECM.
Harness or connectors
(The TP sensor 2 circuit is open or
shorted.)
(APP sensor 2 circuit is shorted.)
Electric throttle control actuator
(TP sensor 2)
Accelerator pedal position sensor P0123
0123Throttle position sensor
2 circuit high inputAn excessively high voltage from the TP sen-
sor 2 is sent to ECM.
Engine operation condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

Page 1532 of 4449

INFINITI FX35 2004 Service Manual DTC P0122, P0123 TP SENSOR
EC-191
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Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS00CGW
NOTE:
If DTC Confirmation Procedure has been previously c

Page 1533 of 4449

INFINITI FX35 2004 Service Manual EC-192
[VQ35DE]
DTC P0122, P0123 TP SENSOR
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS00CGX
TBWM0429E

Page 1534 of 4449

INFINITI FX35 2004 Service Manual DTC P0122, P0123 TP SENSOR
EC-193
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
C

Page 1535 of 4449

INFINITI FX35 2004 Service Manual EC-194
[VQ35DE]
DTC P0122, P0123 TP SENSOR
Revision: 2004 November 2004 FX35/FX45
2. CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness co

Page 1536 of 4449

INFINITI FX35 2004 Service Manual DTC P0122, P0123 TP SENSOR
EC-195
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Revision: 2004 November 2004 FX35/FX45
6. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-4

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