Diagnostic Procedure

1. Turn ignition switch OFF
2. Loosen and retighten ground three screws on the body
   Fig 1: DTC P1229 Checking Ground Connections

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Refer to GROUND INSPECTION .

OK or NG

OK: GO TO 2.

NG: Repair or replace ground connections.

1. Disconnect accelerator pedal position (APP) sensor harness connector
2. Turn ignition switch ON
   Fig 2: DTC P1229 Locating Accelerator Pedal Position Sensor Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Check voltage between APP sensor terminal 6 and ground with CONSULT-II or tester

   Voltage: Approximately 5V 

OK or NG

OK: GO TO  5.

NG: GO TO 3.

Fig 3: Checking Voltage Between APP Sensor Terminal 6 & Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Check the following.

• Harness for short to power and short to ground, between the following terminals
  CHECKING SENSOR POWER SUPPLY CIRCUITS
  
  

  ECM terminal	Sensor terminal
  48	EVAP control system pressure sensor terminal 3
  49	Refrigerant pressure sensor terminal 1
  68	Power steering pressure sensor terminal 1
  90	APP sensor terminal 6

OK or NG

OK: GO TO 4.

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

Check the following.

• EVAP control system pressure sensor (Refer to COMPONENT INSPECTION .)
• Power steering pressure sensor (Refer to COMPONENT INSPECTION .)
• Refrigerant pressure sensor (Refer to REFRIGERANT PRESSURE SENSOR .)

OK or NG

OK: GO TO  7.

NG: Replace malfunctioning components

Refer to COMPONENT INSPECTION .

OK or NG

OK: GO TO  7.

NG: GO TO 6.

1. Replace accelerator pedal position assembly
2. Perform ACCELERATOR PEDAL RELEASED POSITION LEARNING .
3. Perform THROTTLE VALVE CLOSED POSITION LEARNING .
4. Perform IDLE AIR VOLUME LEARNING .

   : INSPECTION END 

Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

: INSPECTION END