Diagnostic Procedure 1

Self-diagnostic results: 

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

First perform the "SELF-DIAG RESULTS" in "BCM" with CONSULT-II, then perform the trouble diagnosis of malfunction system indicated "SELF-DIAG RESULTS" of "BCM". Refer to " CONSULT-II  " 

1. CONFIRM SELF-DIAGNOSTIC RESULTS 

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

   NOTE: In rare case"CHAIN OF ECM-IMMU" might be stored during key registration procedure, even if the system is not malfunctioning.
   Fig 1: CONSULT-II Data Display CHAIN OF ECM-IMMU

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

   Is CONSULT-II screen displayed as above?

   • Yes: GO TO 2.
   • No: GO TO "SYMPTOM MATRIX CHART 1 ".
2. CHECK POWER SUPPLY CIRCUIT FOR BCM 
   1. Disconnect BCM.
   2. Check voltage between BCM connector M19 terminal 55 and ground.
      Fig 2: Checking Voltage Between BCM Connector M19 Terminal 55 & Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
      • 55 (W/B) - Ground: Battery voltage 

   OK or NG

   • OK: GO TO 3.
   • NG: Check the following.
     • A fusible link (letter j, located in fuse and fusible link box)
     • Harness for open or short between fuse and BCM connector
       • Ref. Part No. C1 
3. CHECK IGN SW. ON SIGNAL 
   1. Turn ignition switch ON.
   2. Check voltage between BCM connector M18 terminal 38 and ground.
      Fig 3: Checking Voltage Between BCM Connector M18 Terminal 38 & Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
      • 38 (G) - Ground: Battery voltage 

   OK or NG

   • OK: GO TO 4.
   • NG: Check the following.
     • 10A fuse [No. 16, located in the fuse block (J/B)]
     • Harness for open or short between fuse and BCM connector
       • Ref. part No. C2 
4. CHECK GROUND CIRCUIT FOR BCM 
   1. Turn ignition OFF.
   2. Check continuity between BCM connector M18 terminal 52 and ground.
      Fig 4: Checking Continuity Between BCM Connector M18 Terminal 52 & Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
      • 52 (B/W) - Ground: Continuity should exist. 

   OK or NG

   • OK: GO TO 5.
   • NG: Repair or replace harness. Ref. part No. C3 
5. REPLACE BCM 
   1. Replace BCM. Ref. part No. A 
   2. Perform initialization with CONSULT-II.
   3. For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".

   Does the engine start?

   • Yes: BCM is malfunctioning.
   • No:
     • ECM is malfunctioning.
     • Replace ECM. Ref. part No. B 
     • Perform initialization or re-communicating function.
     • For initialization, refer to "CONSULT-II Operation Manual NATS-IVIS/NVIS".
     • For re-communicating function, refer to "ECM RE-COMMUNICATING FUNCTION ".