Diagnostic Procedure

1. Stop engine.
2. Disconnect IACV-AAC valve harness connector.
3. Turn ignition switch ON.
   Fig 1: Identifying IACV-AAC Valve Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Check voltage between terminal 2 and ground with CONSULT-II or tester.
   Fig 2: Checking Voltage Between Terminal And Ground

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

   Voltage : Battery voltage 

OK or NG 

1. OK : GO TO  3.
2. NG : GO TO 2.

Check the following.

• Harness connectors M59, F27
• Fuse block (J/B) connector M27
• 10A fuse
• Harness for open or short between IACV-AAC valve and fuse
  1. Repair harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 101 and terminal 1.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

4. Also check harness for short to ground and short to power.

OK or NG 

1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.

Disconnect IACV-AAC valve harness connector.

• Check IACV-AAC valve resistance.

  Resistance : Approximately 10 Ω [at 25°C (77°F)] 

• Check plunger for seizing or sticking.
• Check for broken spring.

OK or NG 

1. OK: GO TO 5.
2. NG: Replace IACV-AAC valve.
   Fig 3: Checking IACV-AAC Valve Resistance

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

Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

1. : INSPECTION END.