Diagnostic Procedure 2

Self-diagnostic results: 

CHAIN OF ECM-IMMU displayed on CONSULT-II screen 

1. CONFIRM SELF-DIAGNOSTIC RESULTS 

   Confirm SELF-DIAGNOSTIC RESULTS CHAIN OF ECM-IMMU displayed on CONSULT-II screen.

   Fig 1: Display CHAIN OF ECM-IMMU Screen

   Courtesy of NISSAN MOTOR CO., U.S.A.
   NOTE: In rare cases, CHAIN OF ECM-IMMU might be stored during key registration procedure, even if the system is not malfunctioning.

   Is CONSULT-II screen displayed as shown?

   1. Yes: GO TO 2.
   2. No: GO TO "SYMPTOM MATRIX CHART 1 (SELF-DIAGNOSIS RELATED ITEM)  .
2. CHECK POWER SUPPLY CIRCUIT FOR NVIS (NATS) IMMU 
   1. Disconnect NVIS (NATS) IMMU connector.
   2. Check voltage between terminal 8 of NVIS (NATS) IMMU and ground with CONSULT-II or tester.
      Fig 2: Checking Battery Power To NVIS (NATS) IMMU

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

   OK or NG

   1. OK: GO TO 3.
   2. NG: Check the following
      • 10A fuse (No. 36, located in the fuse and fusible link box)
      • Harness for open or short between fuse and NVIS (NATS) IMMU connector

        Ref. Part No. C1 

3. CHECK IGN SW. ON SIGNAL 
   1. Turn ignition switch ON.
   2. Check voltage between NVIS (NATS) IMMU harness connector E111 terminal 7 (BR) (QG18DE) or (G/W) (QR25DE) and ground with CONSULT-II or tester.
      Fig 3: Checking Ignition Switch Power To NVIS (NATS) IMMU

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

      Battery voltage should exist  .

   OK or NG

   1. OK: GO TO 4.
   2. NG: Check the following
      • 10A fuse [No. 20, located in the fuse block (J/B)]
      • Harness for open or short between fuse and NVIS (NATS) IMMU connector

        Ref. part No. C2 

4. CHECK GROUND CIRCUIT FOR NVIS (NATS) IMMU 
   1. Turn ignition switch OFF.
   2. Check harness continuity between NVIS (NATS) IMMU terminal 4 and ground.
      Fig 4: Checking NVIS (NATS) IMMU Ground Circuit

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

   OK or NG

   1. OK: GO TO 5.
   2. NG: Repair harness. Ref. part No. C3 
5. CHECK COMMUNICATION LINE OPEN CIRCUIT 
   1. Disconnect ECM connector.
   2. Check harness continuity between ECM harness connector F22 (QG18DE) or F54 (QR25DE) terminal 116 (QG18DE) or 31 (QR25DE) (BR/Y) and NVIS (NATS) IMMU connector E111 terminal 1 (BR/Y).
      Fig 5: Checking NVIS (NATS) IMMU Circuit Continuity To ECM

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

      Continuity should exist  .

   OK or NG

   1. OK: GO TO 6.
   2. NG:
      • Repair harness or connector.
      • Ref. part No. C4 
6. CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT 
   1. Turn ignition switch ON.
   2. Check voltage between ECM harness connector F22 (QG18DE) or F54 (QR25DE) terminal 116 (QG18DE) or 31 (QR25DE) (BR/Y) or NVIS (NATS) IMMU harness connector E111 terminal 1 (BR/Y) and ground.
      Fig 6: Checking NVIS (NATS) IMMU Signal To ECM

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

      Voltage: 0V 

   OK or NG

   1. OK: GO TO 7.
   2. NG:
      • Communication line is short-circuited with battery voltage line or ignition switch ON line.
      • Repair harness or connectors.
      • Ref. part No. C4 
7. CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT 
   1. Turn ignition switch OFF.
   2. Check continuity between ECM harness connector F22 (QG18DE) or F54 (QR25DE) terminal 116 (QG18DE) or 31 (QR25DE) (BR/Y) or NVIS (NATS) IMMU connector E111 terminal 1 (BR/Y) and ground.
      Fig 7: Checking Continuity Between NVIS (NATS) IMMU To ECM

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

      Continuity should not exist  .

   OK or NG

   1. OK: GO TO 8.
   2. NG:
      • Communication line is short-circuited with ground line.
      • Repair harness or connectors.
      • Ref. part No. C4 
8. SIGNAL FROM ECM TO NVIS (NATS) IMMU CHECK 
   1. Check the signal between ECM terminal 116 and ground with CONSULT-II or oscilloscope when ignition switch is turned ON.
   2. Make sure signals which are shown in the figure below can be detected during 750 msec. just after ignition switch is turned ON.
      Fig 8: Checking NVIS (NATS) IMMU Signal At ECM With CONSULT-II

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

   OK or NG

   1. OK:
      • NVIS (NATS) IMMU is malfunctioning.
      • Replace NVIS (NATS) IMMU. Ref. part No. A 
      • Perform initialization with CONSULT-II.
      • For the operation of initialization, refer to CONSULT-II OPERATION MANUAL IVIS/NVIS.
   2. NG:
      • ECM is malfunctioning.
      • Replace ECM. Ref. part No. B 
      • Perform initialization with CONSULT-II.
      • For the operation of initialization, refer to CONSULT-II OPERATION MANUAL IVIS/NVIS.