2011 INFINITI QX56 Factory Service Manual

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Page 2497 of 5598

INFINITI QX56 2011 Factory Service Manual
P2127, P2128 APP SENSOREC-473
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
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F
G H
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K L
M A
EC
NP
O
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>

Page 2498 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-474
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2127, P2128 APP SENSOR
>> INSPECTION END
Component Inspection (Accele
rator Pedal Position Sensor)INFOID:0000000006217977
1.CHECK ACCELERATOR PEDAL POSITION

Page 2499 of 5598

INFINITI QX56 2011 Factory Service Manual
P2135 TP SENSOREC-475
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
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J
K L
M A
EC
NP
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P2135 TP SENSOR
DTC LogicINFOID:0000000006217978
DTC DETECTION LOGIC
NOTE:
If DTC P2135 is displayed with DTC

Page 2500 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-476
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2135 TP SENSOR
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, shor

Page 2501 of 5598

INFINITI QX56 2011 Factory Service Manual
P2135 TP SENSOREC-477
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
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Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTU

Page 2502 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-478
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2138 APP SENSOR
P2138 APP SENSOR
DTC LogicINFOID:0000000006217981
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P0643, first pe
rform the trou

EC-478
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2138 APP SENSOR
P2138 APP SENSOR
DTC LogicINFOID:0000000006217981
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P0643, first pe
rform the trouble diagnosis for DTC P0643. Refer to
EC-381, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confi rm that battery voltage is 8 V or more at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-478, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217982
1.CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P2138 APP SENSOR
(Accelerator pedal position
sensor circuit range/perfor-
mance) Rationally incorrect voltage is
sent to ECM compared with
the signals from APP sensor 1
and APP sensor 2. Harness or connectors
(APP sensor 1 or 2 circuit is open or shorted.)
[CKP sensor circuit is shorted.]
[CMP sensor (bank 1) circuit is shorted.]
(Battery current sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is shorted.)
(EVAP control system pressure sensor circuit is short-
ed.)
Accelerator pedal position sensor (APP sensor 1 or 2)
Crankshaft position sensor
Camshaft position sensor (bank 1)
Refrigerant pressure sensor
Battery current sensor
EVAP control system pressure sensor
APP sensor Ground Voltage (V)
Connector Terminal
E110
(Without ICC) 2
Ground Approx. 5
E67
(With ICC) 12
Revision: 2010 May2011 QX56

Page 2503 of 5598

INFINITI QX56 2011 Factory Service Manual
P2138 APP SENSOREC-479
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Loose or poor connection f

Page 2504 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-480
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P2138 APP SENSOR
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair short to ground or short to power in harness or connectors.
7.CHECK COMPONENTS

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