Nissan GT-R (R35) · Service Manual ELECTRICAL & POWER CONTROL

B260A IGNITION RELAY

POWER DISTRIBUTION SYSTEM

B260A

Description


When the ignition switch is turned ON, the BCM activates the following relays to provide power supply to each ECU.
  • Ignition relay (inserted into fuse block)
  • Ignition relay (built into IPDM E/R)
  • Blower relay
BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

DTC Logic

 
 DTC DETECTION LOGIC

NOTE：
  • If DTC B260A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to DTC Logic.
  • If DTC B260A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to DTC Logic.
  • If DTC B260A is displayed with DTC B261A, first perform the trouble diagnosis for DTC B261A. Refer to DTC Logic.

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
B260A
 		IGNITION RELAY
 		BCM detects a difference of signal for 2 seconds or more between the following information.
  • Ignition relay (IPDM E/R) operation request
  • Ignition relay feedback from IPDM E/R (CAN).
  • Harness or connectors
    (Ignition relay operation circuit is open or shorted.)
  • IPDM E/R

 
 DTC CONFIRMATION PROCEDURE

 
 1.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK DTC WITH IPDM E/R
 
 2.CHECK IGNITION RELAY INPUT SIGNAL
 
 3.CHECK IGNITION RELAY (IPDM E/R) CIRCUIT
 
 4.CHECK INTERMITTENT INCIDENT