Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
  Refer to "GROUND INSPECTION ".
  
  Fig 1: Identifying Body Ground Screws
  Courtesy of NISSAN NORTH AMERICA, INC.
  
  OK or NG
  
  OK: GO TO 2.
  
  NG: Repair or replace ground connections.
CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Accelerator Pedal Position Sensor
  Courtesy of NISSAN NORTH AMERICA, INC.
3. Check voltage between APP sensor terminal 7 and ground with CONSULT or tester.
  Voltage: Approximately 5 V
  
  OK or NG
  
  OK: GO TO 5.
  
  NG: GO TO 3.
  
  Fig 3: Checking Voltage Between Accelerator Pedal Position Sensor Terminal 7 And Ground
  Courtesy of NISSAN NORTH AMERICA, INC.

CHECK SENSOR POWER SUPPLY CIRCUITS

Check harness for short to power and short to ground, between the following terminals.

ECM terminal	Sensor terminal	Reference Wiring Diagram
48	EVAP control system pressure sensor terminal 3	"WIRING DIAGRAM "
49	Refrigerant pressure sensor terminal 1
49	Battery current sensor terminal 1
68	Power steering pressure sensor terminal 1
90	APP sensor terminal 7

OK or NG

OK: GO TO 4.

NG: Repair short to ground or short to power in harness or connectors.

CHECK COMPONENTS
Check the following.
- EVAP control system pressure sensor (Refer to "COMPONENT INSPECTION ".)
- Power steering pressure sensor (Refer to "COMPONENT INSPECTION ".)
- Battery current sensor (Refer to "COMPONENT INSPECTION ".)
- Refrigerant pressure sensor (Refer to "COMPONENT DESCRIPTION ".)
  OK or NG
  
  OK: GO TO 5.
  
  NG: Replace malfunctioning components.
CHECK ACCELERATOR PEDAL POSITION SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 5.

NG: GO TO 6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal position assembly. Refer to UNIT REMOVAL AND INSTALLATION .
2. Perform "ACCELERATOR PEDAL RELEASED POSITION LEARNING ".
3. Perform "THROTTLE VALVE CLOSED POSITION LEARNING ".
4. Perform "IDLE AIR VOLUME LEARNING ".
  :INSPECTION END
5. CHECK INTERMITTENT INCIDENT
  Refer to "HOW TO CHECK TERMINAL " and "INTERMITTENT INCIDENT ".
  
  :INSPECTION END