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

B2553 IGNITION RELAY

POWER DISTRIBUTION SYSTEM

B2553

Description


BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON.
  • Ignition relay (inserted into fuse box)
  • 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

DTC No.
 		Trouble diagnosis name
 		DTC detecting condition
 		Possible cause
B2553
 		IGNITION RELAY
 		BCM detects a difference of signal for 2 seconds or more between the following information.
  • Ignition relay (fuse block) ON/OFF operation
  • Ignition relay (fuse block) feedback.
  • Harness or connectors
    (ignition relay feedback circuit is open or short)
  • Fuse
  • Ignition relay
  • IPDM E/R

 
 DTC CONFIRMATION PROCEDURE

 
 1.PERFORM DTC CONFIRMATION PROCEDURE

Diagnosis Procedure


 
 1.CHECK DTC WITH IPDM E/R
 
 2.CHECK FUSE
 
 3.CHECK IGNITION RELAY FEEDBACK INPUT SIGNAL
 
 4.CHECK IGNITION RELAY FEEDBACK CIRCUIT
 
 5.CHECK INTERMITTENT INCIDENT