2006 INFINITI M35 Factory Service Manual

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Page 2921 of 5621

INFINITI M35 2006 Factory Service Manual EC-1378
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DTC P2135 TP SENSOR
Revision: 2006 January2006 M35/M45
Component InspectionNBS005P3
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform EC-806, "

Page 2922 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2138 APP SENSOR
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DTC P2138 APP SENSORPFP:18002
Component DescriptionNBS005P5
The accelerator pedal position sensor

DTC P2138 APP SENSOR
EC-1379
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DTC P2138 APP SENSORPFP:18002
Component DescriptionNBS005P5
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeNBS005P6
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis LogicNBS005P7
This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-1218, "
DTC P0643 SENSOR POWER SUPPLY" .
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN 1
ACCEL SEN 2*
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.4 - 1.1V
Accelerator pedal: Fully depressed 3.7 - 4.8V
CLSD THL POS
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138
2138Accelerator pedal posi-
tion sensor circuit
range/performanceRationally incorrect voltage is sent to ECM
compared with the signals from APP sensor 1
and APP sensor 2.
Harness or connector
(APP sensor 1 and 2 circuit is open or
shorted.)
(TP sensor circuit is shorted.)
Accelerator pedal position sensor
(APP sensor 1 and 2)
Electric throttle control actuator
(TP sensor 1 and 2)
Engine operating 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 2923 of 5621

INFINITI M35 2006 Factory Service Manual EC-1380
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DTC P2138 APP SENSOR
Revision: 2006 January2006 M35/M45
DTC Confirmation ProcedureNBS005P8
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ign

Page 2924 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2138 APP SENSOR
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Revision: 2006 January2006 M35/M45
Wiring DiagramNBS005P9
TBWT1058E

Page 2925 of 5621

INFINITI M35 2006 Factory Service Manual EC-1382
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DTC P2138 APP SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground termi

Page 2926 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2138 APP SENSOR
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2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1)

Page 2927 of 5621

INFINITI M35 2006 Factory Service Manual EC-1384
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DTC P2138 APP SENSOR
Revision: 2006 January2006 M35/M45
5. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harnes

Page 2928 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2138 APP SENSOR
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Revision: 2006 January2006 M35/M45
10. CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM

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