Nissan Maxima Service and Repair Manual: DTC/circuit diagnosis

  • Power supply and ground circuit
  • BCM BCM : Diagnosis Proce 1. CHECK FUSE AND FUSIBLE LINK Check if the following BCM fuses or fusible link are blow 2. CHECK POWER SUPPLY CIRCUIT Turn ignition switch OFF. Disconnect BCM. Check voltage between BCM harness connector and ground. 3. CHECK GROUND CIRCUIT Check continuity between BCM harness connector and ground. SUNROOF MOTOR ASSEMBLY SUNROOF MOTOR ASSEMBLY : Diagnosis Procedure 1.CHECK POWER SUPPLY Turn ignition switch OFF. Disconnect sunroof motor assembly connector. Turn ignition switch ON. Check voltage between sunroof motor assembly harness connector and ground. 2.CHECK GROUND CIRCUIT Turn ignition switch OFF.

  • Communication signal circuit
  • Description Detects door open/close condition. Diagnosis Procedure 1.CHECK FRONT DOOR SWITCH INPUT SIGNAL Turn ignition switch OFF. Disconnect sunshade motor assembly connector. Turn ignition switch ON. Check signal between sunshade motor assembly harness connector and ground with oscilloscope. 2.CHECK COMMUNICATION SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect sunroof motor assembly connector. Check continuity between sunshade motor assembly harness connector (A) and sunroof motor assembly harness connector (B). Check continuity between sunshade motor assembly harness connector and ground.

  • Sunroof switch
  • Description Transmits switch operation signal to sunroof motor assembly. Diagnosis Procedure 1.CHECK SUNROOF SWITCH INPUT SIGNAL Turn ignition switch ON. Check voltage between sunroof motor assembly harness connector and ground. 2.CHECK SUNROOF SWITCH CIRCUIT Turn ignition switch OFF. Disconnect sunroof motor assembly connector and sunroof switch connector. Check continuity between sunroof motor assembly harness connector (A) and sunroof switch harness connector (B). Check continuity between sunroof motor assembly harness connector and ground. 3.CHECK SUNROOF SWITCH GROUND CIRCUIT Check continuity between sunroof switch harness connector and ground. 4.

  • Door switch
  • Description Detects door open/close condition. Component Function Check 1.CHECK FUNCTION With CONSULT Check door switches DOOR SW-DR, DOOR SW-AS in Data Monitor mode with CONSULT. Diagnosis Procedure 1.CHECK DOOR SWITCH INPUT SIGNAL Turn ignition switch OFF. Check signal between BCM connector and ground with oscilloscope. 2.CHECK DOOR SWITCH CIRCUIT Disconnect BCM connector. Check continuity between BCM connector and door switch connector. Check continuity between BCM connector and ground. 3.CHECK DOOR SWITCH 4.CHECK INTERMITTENT INCIDENT Component Inspection 1.CHECK DOOR SWITCH Turn ignition switch OFF. Disconnect door switch connector. Check door switch.

Diagnosis system (BCM)

Power supply and ground circuit