Inspection 2: Warning Lamp Stays On When Ignition Switch Is Turned On.

DIAGNOSTIC PROCEDURE

1. CHECK CONNECTOR 
   1. Disconnect BCM harness connectors M18, M19 and M20.
   2. Check terminals for damage or loose connections.

   Inspection results OK?

   • OK: GO TO 2.
   • NG: Repair or replace damaged parts.
2. CHECK POWER SUPPLY CIRCUIT (BAT) 

   Check voltage between BCM harness connector M19 terminal 55 (W/B) and ground.

   Fig 1: Checking Voltage Between BCM Harness Connector M19 Terminal 55 & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 2: BCM Harness Connector M19 Terminal Voltage Reference Table

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

   OK or NG

   • OK: GO TO 3.
   • NG: Check BCM power supply circuit for open or short.
3. CHECK POWER SUPPLY CIRCUIT (IGN) 
   1. Turn ignition switch ON.
   2. Check voltage between BCM harness connector M18 terminal 38 (G) and ground.
      Fig 3: Checking Voltage Between BCM Harness Connector M18 Terminal 38 & Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 4: BCM Harness Connector M18 Terminal 38 Voltage Reference Table

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

   OK or NG

   • OK: GO TO 4.
   • NG: Check BCM power supply circuit for open or short.
4. CHECK GROUND CIRCUIT 

   Check continuity between BCM harness connector M19 terminal 52 (B/W) and ground.

   Fig 5: Checking Continuity Between BCM Harness Connector M19 Terminal 52 & Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.
   Fig 6: BCM Harness Connector M19 Terminal 52 Continuity Reference Table

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

   OK or NG

   • OK: Replace BCM. Refer to REMOVAL AND INSTALLATION OF BCM .
   • NG: Repair or replace BCM ground circuit.