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 PSP SENSOR POWER SUPPLY CIRCUIT
1. Disconnect power steering pressure (PSP) sensor (1) harness connector.
2. Turn ignition switch ON.
  
  Fig 2: Identifying Power Steering Pressure Sensor
  Courtesy of NISSAN NORTH AMERICA, INC.
3. Check voltage between PSP sensor terminal 1 and ground with CONSULT or tester.
  Voltage: Approximately 5 V
  
  OK or NG
  
  OK: GO TO 3.
  
  NG: Repair harness or connectors.
  
  Fig 3: Checking Voltage Between Power Steering Pressure Sensor Terminal 1 And Ground
  Courtesy of NISSAN NORTH AMERICA, INC.
CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between PSP sensor terminal 3 and ECM terminal 67.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist .
4. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 4.
  
  NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.
  Continuity should exist .
2. Also check harness for short to ground and short to power.
  OK or NG
  
  OK: GO TO 5.
  
  NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK PSP SENSOR
Refer to "COMPONENT INSPECTION ".

OK or NG

OK: GO TO 6.

NG: Replace PSP sensor. Refer to UNIT REMOVAL AND INSTALLATION .
CHECK INTERMITTENT INCIDENT
Refer to "HOW TO CHECK TERMINAL " and "INTERMITTENT INCIDENT ".

:INSPECTION END