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

B2099 IGNITION RELAY OFF STUCK

IPDM E/R

B2099

Description


  • IPDM E/R operates the ignition relay when it receives an ignition switch ON signal from BCM via CAN communication.
  • Turn the ignition relay OFF by pressing the push‐button ignition switch once when the vehicle speed is 4 km/h (2.5 MPH) or less.
  • Turn the ignition relay OFF with the following operation when the vehicle speed is more than 4 km/h (2.5 MPH) or when an abnormal condition occurs in CAN communication from the unified meter and A/C amp.(Emergency OFF)
    • Press and hold the push‐button ignition switch for 2 seconds or more.
    • Press the push‐button ignition switch 3 times within 1.5 seconds.
NOTE:
The ignition relay does not turn ON for 3 seconds after emergency OFF even if the push‐button ignition switch is pressed.

DTC Logic

 
 DTC DETECTION LOGIC

DTC
CONSULT‐III display description
DTC Detection Condition
Possible causes
B2099
IGN RELAY OFF
The ignition relay OFF is detected for 1 second at ignition switch ON
(CPU monitors the status at the contact and excitation coil circuits of the ignition relay inside it)
Ignition relay malfunction
NOTE:
When IPDM E/R power supply voltage is low (Approx. 7 ‐ 8 V for about 1 second), the “DTC: B2099” may be detected.

Diagnosis Procedure


 
 1.PERFORM SELF DIAGNOSIS