Exhaust Valve Solenoid System Inspection

INSPECTION PROCEDURE

1. SELF-DIAGNOSIS RESULT CHECK 

   Check self-diagnosis results.

   EXHAUST VALVE SOLENOID SYSTEM - SELF-DIAGNOSIS RESULTS
   
   

   Self-diagnosis results
   C1803
   C1805

   Is the above displayed in the self-diagnosis display items? 

   1. YES: If code C1803 was retrieved during self-diagnosis, GO TO 3. If code C1805 was retrieved during self-diagnosis, GO TO 2.
   2. NO: Inspection End.
2. CHECK SYSTEM OPERATION 
   1. Load vehicle to standard laden condition (with driver, front passenger, 2 passengers in second row seats and no cargo).
   2. Conduct active test of "COMPRESSOR" to raise vehicle ride height to +20mm.
      CAUTION: The "COMPRESSOR" active test will remain ON until it is turned off using CONSULT-II. Allowing the compressor to run for an extended period of time may cause damage to air suspension system components due to excessive pressure in the air suspension system.
   3. Return the rear load leveling air suspension system to normal operating mode.
   4. Check self-diagnostic results.

      Is code C1805 displayed again? 

   1. YES: GO TO 3.
   2. NO: Inspection End.
3. CONNECTOR INSPECTION 
   1. Disconnect suspension control unit connector B3 and suspension air compressor C9.
   2. Check the terminals for deformation, disconnection, looseness or damage.

   OK or NG 

   1. OK: If code C1805 was retrieved during self-diagnosis, GO TO 4. If code C1803 was retrieved during self-diagnosis, GO TO 6
   2. NG: Repair or replace as necessary.
4. AIR HOSE INSPECTION 

   Inspect for pinched or damaged air hoses between the suspension air reservoir and each load leveling rear air suspension shock absorber.

   OK or NG 

   1. OK: GO TO 5.
   2. NG: Repair or replace as necessary.
5. EXHAUST VALVE SOLENOID INSPECTION 

   Apply 12V to suspension air compressor C9 terminal 2 and body ground to suspension air compressor C9 terminal 1.

   1. System air pressure should vent. 

   OK or NG 

   1. OK: GO TO 6.
   2. NG: Replace the suspension air compressor. Refer to "CONTROL UNIT ".
      Fig 1: Applying 12V To Suspension Air Compressor C9 Terminal 2 And Body Ground To Suspension Air Compressor C9 Terminal 1

      Courtesy of NISSAN MOTOR CO., U.S.A.
6. CHECK EXHAUST VALVE SOLENOID POWER AND GROUND 
   1. Reconnect the suspension control unit connector.
   2. Turn the ignition switch ON.
   3. Check voltage between suspension air compressor connector C9 terminal 2 (SB) and ground.
      1. Voltage: Approx. 12V 
      Fig 2: Checking Voltage Between Suspension Air Compressor Connector C9 Terminal 2 (SB) And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
   4. Check resistance between suspension air compressor connector C9 terminal 1 (B) and ground.
      1. Continuity should exist. 

   OK or NG 

   1. OK: Replace the suspension control unit. Refer to "CONTROL UNIT ".
   2. NG: Repair the circuit.
      Fig 3: Checking Resistance Between Suspension Air Compressor Connector C9 Terminal 1 (B) And Ground

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