2005 INFINITI QX4 Factory Service Manual

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Page 1793 of 3419

INFINITI QX4 2005 Factory Service Manual EC-602Revision: October 2005
DTC P2127, P2128 APP SENSOR
2005 QX56
6. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-90, "
Throttle Valve C

Page 1794 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P2127, P2128 APP SENSOR
EC-603
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EC
Revision: October 20052005 QX56
Component InspectionUBS00HCI
ACCELERATOR PEDAL POSITION SENSOR
1. Reconnect all harness connectors disconne

Page 1795 of 3419

INFINITI QX4 2005 Factory Service Manual EC-604Revision: October 2005
DTC P2135 TP SENSOR
2005 QX56
DTC P2135 TP SENSORPFP:16119
Component DescriptionUBS00HCK
Electric throttle control actuator consists of throttle control motor,
throttle po

EC-604Revision: October 2005
DTC P2135 TP SENSOR
2005 QX56
DTC P2135 TP SENSORPFP:16119
Component DescriptionUBS00HCK
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 ModeUBS00HCL
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 LogicUBS00HCM
This self-diagnosis has the one trip detection logic.
FAIL -S AFE M OD E
When the malfunction is detected, the 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
P2135
2135Throttle position sensor
circuit range/performance
problemRationally incorrect voltage is sent to ECM
compared with the signals from TP sensor 1
and TP sensor 2.
Harness or connector
(TP sensor 1 and 2 circuit is open or
shorted.)
(APP sensor 2 circuit is shorted.)
Electric throttle control actuator
(TP sensor 1 and 2)
Accelerator pedal position sensor
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 1796 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P2135 TP SENSOR
EC-605
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MA
EC
Revision: October 20052005 QX56
DTC Confirmation ProcedureUBS00HCN
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn i

Page 1797 of 3419

INFINITI QX4 2005 Factory Service Manual EC-606Revision: October 2005
DTC P2135 TP SENSOR
2005 QX56
Wiring DiagramUBS00HCO
BBWA1708E

Page 1798 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P2135 TP SENSOR
EC-607
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EC
Revision: October 20052005 QX56
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM

Page 1799 of 3419

INFINITI QX4 2005 Factory Service Manual EC-608Revision: October 2005
DTC P2135 TP SENSOR
2005 QX56
2. CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition

Page 1800 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P2135 TP SENSOR
EC-609
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EC
Revision: October 20052005 QX56
6. REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace the accelerator pedal assembly.
2. Perform EC-90, "
Accelerator Pe

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