Diagnostic Procedure 2

Self-diagnostic results:

"CHAIN OF ECM-IMMU" displayed on CONSULT-II screen

CONFIRM SELF-DIAGNOSTIC RESULTS
confirm SELF-DIAGNOSTIC RESULTS "CHAIN OF ECM-IMMU" displayed on CONSULT-II screen.

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) ".
  
  Fig 1: Identifying Self Display Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK POWER SUPPLY CIRCUIT FOR NVIS (NATS) IMMU
1. Disconnect NVIS (NATS) IMMU.
2. Check voltage between terminal 8 of NVIS (NATS) IMMU and ground.
Fig 2: Disconnecting 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
CHECK IGN SW. ON SIGNAL
1. Turn ignition switch ON.
2. Check voltage between NVIS (NATS) IMMU harness connector E111 terminal 7 (G/W) and ground.
Battery voltage should exist

Fig 3: Checking IGN SW. On Signal
Courtesy of NISSAN MOTOR CO., U.S.A.

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
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 Harness Continuity Between Nvis (Nats) Immu Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 5.
2. NG: Repair harness. Ref. part No. C3
CHECK COMMUNICATION LINE OPEN CIRCUIT
1. Disconnect ECM connector.
2. Check harness continuity between ECM harness connector F59 terminal 88 (BR/Y) and NVIS (NATS) IMMU connector E111 terminal 1 (BR/Y).
Continuity should exist.

OK or NG
1. OK: GO TO 6.
2. NG
  - Repair or replace harness.
  - Ref. part No. C4
    
    Fig 5: Checking Communication Line Open Circuit
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COMMUNICATION LINE BATTERY SHORT CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between ECM harness connector F59 terminal 88 (BR/Y) or NVIS (NATS) IMMU harness connector E111 terminal 1 (BR/Y) and ground.
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 or replace harness.
  - Ref. part No. C4
    
    Fig 6: Checking Communication Line Battery Short Circuit
    Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COMMUNICATION LINE GROUND SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between ECM harness connector F59 terminal 88 (BR/Y) or NVIS (NATS) IMMU connector E111 terminal 1 (BR/Y) and ground.
Continuity should not exist.

OK or NG
1. OK: GO TO 8.
2. NG
  - Communication line is short-circuited with ground line.
  - Repair or replace harness.
  - Ref. part No. C4
    
    Fig 7: Checking Communication Line Ground Short Circuit
    Courtesy of NISSAN MOTOR CO., U.S.A.
SIGNAL FROM ECM TO NVIS (NATS) IMMU CHECK
1. Check the signal between ECM terminal 88 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: Identifying Signal From Ecm To Nvis (Nats)
  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".