Diagnostic Procedure 1: Notes

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 " CAN COMMUNICATION INSPECTION USING CONSULT-II (SELF-DIAGNOSIS)  "  .

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.

   Is CONSULT-II screen displayed as shown in figure?

   • YES: GO TO 2.
   • NO: GO TO "SYMPTOM MATRIX CHART 1 ".
     Fig 1: Display CONSULT-II - Self Diagnosis Screen

     Courtesy of NISSAN MOTOR CO., U.S.A.
2. CHECK POWER SUPPLY CIRCUIT FOR BCM 
   1. Turn ignition switch OFF.
   2. Disconnect BCM connector.
   3. Check voltage between BCM and ground with CONSULT-II or tester.
   TERMINALS VOLTAGE REFERENCE
   
   

   Connector	Terminals (Wire color)		Voltage [V] (Approx.)
   	(+)	(-)
   M2	42 (GY)	Ground	Battery voltage
   	55 (W/R)

   Fig 2: Identifying Voltage Between BCM And Ground

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

   OK or NG

   • OK: GO TO 3.
   • NG: Check the following.
     • 50A fusible link (letter F, located in the fuse and fusible link box)
     • 10A fuse [No.18, located in the fuse block (J/B)]
     • Harness for open or short between fusible link and BCM
     • Harness for open or short between fuse and BCM
3. CHECK IGNITION SWITCH ON SIGNAL 
   1. Turn ignition switch ON.
   2. Check voltage between BCM connector M1 terminal 38 and ground with CONSULT-II or tester.

   38 (W/L) - Ground : Battery voltage 

   OK or NG

   • OK: GO TO 4.
   • NG: Check the following.
     • 10A fuse [No. 1, located in the fuse block (J/B)]
     • Harness for open or short between fuse and BCM
     Fig 3: Identifying Voltage Between BCM Connector M1 Terminal 38 And Ground

     Courtesy of NISSAN MOTOR CO., U.S.A.
4. CHECK GROUND CIRCUIT FOR BCM 
   1. Turn ignition switch OFF.
   2. Check continuity between BCM connector M2 terminal 52 and ground.

   52 (B) - Ground : Continuity should exist. 

   Fig 4: Identifying Continuity Between BCM Connector M2 Terminal 52 And Ground

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

   OK or NG

   • OK: GO TO 5.
   • NG: Repair or replace harness.
5. REPLACE BCM 
   1. Replace BCM
   2. Perform initialization with CONSULT-II.

   Does the engine start?

   YES: BCM is malfunctioning.

   • Replace BCM.
   • Perform initialization with CONSULT-II

   NO: ECM is malfunctioning.

   • Replace ECM.
   • Perform initialization or re-communicating function
   • For re-communicating function, refer to "ECM RE-COMMUNICATING FUNCTION ".