2007 INFINITI M35 Factory Service Manual

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Page 2457 of 4647

INFINITI M35 2007 Factory Service Manual EC-928
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DTC P0117, P0118 ECT SENSOR
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS005CW
TBWT1018E

Page 2458 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0117, P0118 ECT SENSOR
EC-929
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Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS005CX
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen a

Page 2459 of 4647

INFINITI M35 2007 Factory Service Manual EC-930
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DTC P0117, P0118 ECT SENSOR
Revision: 2007 April2007 M35/M45
3. DETECT MALFUNCTIONING RART
Check the following.
Harness connector F291, F50
Harness for open or short between ECM and

Page 2460 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0117, P0118 ECT SENSOR
EC-931
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Revision: 2007 April2007 M35/M45
Component InspectionNBS005CY
ENGINE COOLANT TEMPERATURE SENSOR
1. Check resistance between engine

Page 2461 of 4647

INFINITI M35 2007 Factory Service Manual EC-932
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DTC P0122, P0123 TP SENSOR
Revision: 2007 April2007 M35/M45
DTC P0122, P0123 TP SENSORPFP:16119
Component DescriptionNBS005D0
Electric throttle control actuator consists of throttle co

EC-932
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DTC P0122, P0123 TP SENSOR
Revision: 2007 April2007 M35/M45
DTC P0122, P0123 TP SENSORPFP:16119
Component DescriptionNBS005D0
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 ModeNBS005D1
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 LogicNBS005D2
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 SEN 1
THRTL SEN 2*
Ignition switch: ON
(Engine stopped)
Selector 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
(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
(APP sensor 2) P0123
0123Throttle position sensor
2 circuit high inputAn excessively high voltage from the TP sensor
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 2462 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0122, P0123 TP SENSOR
EC-933
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Revision: 2007 April2007 M35/M45
DTC Confirmation ProcedureNBS005D3
NOTE:
If DTC Confirmation Procedure has been previously conduct

Page 2463 of 4647

INFINITI M35 2007 Factory Service Manual EC-934
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DTC P0122, P0123 TP SENSOR
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS005D4
TBWT1491E

Page 2464 of 4647

INFINITI M35 2007 Factory Service Manual DTC P0122, P0123 TP SENSOR
EC-935
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Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION

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