Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Diagnosis Procedure

1. CHECK OUTPUT 1 - 6 CIRCUIT FOR OPEN

   1. 1. Ignition switch OFF.

      2. Disconnect BCM connector and combination switch connectors.

      3. Check continuity between BCM harness connector and combination switch harness connector.

         Combination switch signal	BCM		Combination switch		Continuity
         	Connector	Terminal	Connector	Terminal
         OUTPUT 1	M83	48	M28	7	Yes
         OUTPUT 2		49		15
         OUTPUT 3		53		10
         OUTPUT 4		52		5
         OUTPUT 5		50		2
         OUTPUT 6		51		12

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair harness or connectors.

2. CHECK OUTPUT 1 - 6 CIRCUIT FOR SHORT

   1. Check for continuity between BCM harness connector and ground.

      Combination switch signal	BCM		—	Continuity
      	Connector	Terminal
      OUTPUT 1	M83	48	Ground	No
      OUTPUT 2		49
      OUTPUT 3		53
      OUTPUT 4		52
      OUTPUT 5		50
      OUTPUT 6		51

   Is the inspection result normal?

   YES >>

   GO TO 3.

   NO >>

   Repair harness or connectors.

3. CHECK COMBINATION SWITCH OUTPUT SIGNAL

   1. 1. Connect BCM connector and combination switch connector.

      2. Ignition switch ON.

      3. Turn ON any switch in the system that is malfunctioning.

      4. Check voltage between BCM harness connector and ground.

         Combination switch signal	(+)		(−)	Voltage (Approx.)
         	BCM
         	Connector	Terminal
         OUTPUT 1	M83	48	Ground	Refer to Reference Value.
         OUTPUT 2		49
         OUTPUT 3		53
         OUTPUT 4		52
         OUTPUT 5		50
         OUTPUT 6		51

   Is the inspection result normal?

   YES>>

   Replace BCM. Refer to Removal and Installation.

   NO>>

   Replace combination switch. Refer to Removal and Installation.

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