Infiniti QX56 (Z62). Manual - part 625
EC-478
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P2138 APP SENSOR
P2138 APP SENSOR
DTC Logic
INFOID:0000000006217981
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
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, confirm 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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID: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