Nissan Murano: Dtc/circuit Diagnosis / P2127 App Sensor
DTC DETECTION LOGIC
-
An excessively low voltage from the APP sensor 2 is sent to ECM.
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An excessively high voltage from the APP sensor 2 is sent to ECM.
| DTC |
CONSULT screen terms (Trouble diagnosis content) |
DTC detection condition | |
| P2127 |
APP SEN 2/CIRC (Throttle/Pedal position sensor/switch “E” circuit low) |
Diagnosis condition | Start engine and let it idle |
| Signal (terminal) | Voltage signal transmitted from APP sensor 2 to ECM | ||
| Threshold | An excessively low voltage is sent to ECM | ||
| Diagnosis delay time | — | ||
| P2128 |
APP SEN 2/CIRC (Throttle/Pedal position sensor/switch “E” circuit high) |
Diagnosis condition | Start engine and let it idle |
| Signal (terminal) | Voltage signal transmitted from APP sensor 2 to ECM | ||
| Threshold | An excessively high voltage is sent to ECM | ||
| Diagnosis delay time | — | ||
POSSIBLE CAUSE
DTC P2127
-
Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[CMP sensor (PHASE) circuit is open or shorted.]
(EOP sensor circuit is shorted.)
(Refrigerant pressure sensor is shorted.)
-
Accelerator pedal position sensor
(APP sensor 2)
-
Camshaft position sensor (PHASE)
-
Engine oil pressure sensor
-
Refrigerant pressure sensor
DTC P2128
-
Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[CMP sensor (PHASE) circuit is open or shorted.]
(EOP sensor circuit is shorted.)
(Refrigerant pressure sensor is shorted.)
-
Accelerator pedal position sensor
(APP sensor 2)
-
Camshaft position sensor (PHASE)
-
Engine oil pressure sensor
-
Refrigerant pressure sensor
FAIL-SAFE
| Engine operating condition in fail-safe mode | ||
|---|---|---|
| Fail safe mode | Nissan Murano Vehicle behavior | |
| Electric throttle control actuator |
(When electric throttle control actuator does not function properly due to the return spring malfunction:) ECM controls the electric throttle actuator by regulating the throttle opening around the idle position. The engine speed will not rise more than 2,000 rpm. |
|
|
(When throttle valve opening angle in fail-safe mode is not in specified range:) ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less. |
||
|
(When ECM detects the throttle valve is stuck open:) While the Nissan Murano vehicle is being driven, it slows down gradually because of fuel cut. After the vehicle stops, the engine stalls. The engine can restart in the N or P position, and engine speed will not exceed 1,000 rpm or more. |
||
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
-
Turn ignition switch OFF and wait at least 10 seconds.
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Turn ignition switch ON.
-
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
-
Start engine and let it idle for 1 second.
-
Check DTC.
Is DTC detected?
YES>>Proceed to Diagnosis Procedure.
NO>>To check malfunction symptom before repair: Refer to Intermittent Incident.
NO>>Confirmation after repair: INSPECTION END
CHECK APP SENSOR 2 POWER SUPPLY
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Disconnect accelerator pedal position (APP) sensor harness connector.
-
Turn ignition switch ON.
-
Check the voltage between APP sensor harness connector and ground.
+ − Voltage (V) APP sensor Connector Terminal E31 5 Ground Approx. 5
Is the inspection result normal?
YES>>GO TO 3.
NO>>GO TO 2.
CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT
-
Turn ignition switch OFF.
-
Disconnect ECM harness connector.
-
Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor ECM Continuity Connector Terminal Connector Terminal E31 5 E32 142 Existed
Is the inspection result normal?
YES>>Check sensor power supply 2 circuit. Refer to Diagnosis Procedure.
NO>>Repair or replace error-detected parts.
CHECK APP SENSOR 2 GROUND CIRCUIT
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Turn ignition switch OFF.
-
Disconnect ECM harness connector.
-
Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor ECM Continuity Connector Terminal Connector Terminal E31 1 E32 144 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>GO TO 4.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT
-
Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor ECM Continuity Connector Terminal Connector Terminal E31 6 E32 143 Existed -
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES>>GO TO 5.
NO>>Repair open circuit, short to ground or short to power in harness or connectors.
CHECK APP SENSOR
Check APP sensor. Refer to Component Inspection.
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace accelerator pedal assembly. Refer to Removal and Installation.
CHECK ACCELERATOR PEDAL POSITION SENSOR
-
Reconnect all harness connectors disconnected.
-
Turn ignition switch ON.
-
Check the voltage between ECM harness connector terminals under the following conditions.
ECM Condition Voltage (V) Connector + – Terminal E32 150 151 Accelerator pedal Fully released 0.5 - 1.0 Fully depressed 4.2 - 4.8 143 144 Fully released 0.25 - 0.50 Fully depressed 2.0 - 2.5
Is the inspection result normal?
YES>>INSPECTION END
NO>>Replace accelerator pedal assembly. Refer to Removal and Installation.
P2122 App Sensor
DTC Description
DTC DETECTION LOGIC
An excessively low voltage from the APP sensor 1 is sent to ECM.
An excessively high voltage from the APP sensor 1 is sent to ECM...
P2135 Tp Sensor
DTC Description
DTC DETECTION LOGICRationally incorrect voltage is sent to ECM compared with the signals from TP sensor 1 and TP sensor 2. DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P2135
TP SENSOR-B1
(Throttle/Pedal position sensor/switch “A” / “B” voltage correlation)
Diagnosis condition
Start engine and let it idle
Signal (terminal)
TP sensor 1 signal and TP sensor 2 signal
Threshold
Rationally incorrect voltage is sent to ECM compared with the signals from TP sensor 1 and TP sensor 2
Diagnosis delay time
—
POSSIBLE CAUSE
Harness or connector
(TP sensor 1 or 2 circuit is open or shorted...
Other information:
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LATCH (Lower Anchors and Tethers for CHildren) system
LATCH system lower anchor locations - bench seat
Your vehicle is equipped with special anchor points that are used with LATCH system compatible child restraints. This system may also be referred to as the ISOFIX or ISOFIX compatible system. With this system, you do not have to use a vehicle seat belt to secure the child restraint unless the combined weight of the child and child restraint exceeds 65 lbs. (29.5 kg). If the combined weight of the child and child restraint is greater than 65 lbs. (29.5 kg), use the vehicle’s seat belt (not the lower anchors) to install the child restraint. Be sure to follow the child restraint manufacturer’s instructions for installation.
