DTC B12A3-72 FOR FUEL PUMP RELAY STUCK OPEN
SERVICE INFORMATION
DTC B12A3-72 (Fuel Pump Relay Stuck Open) may be stored when the IPDM monitor
circuit internally sees 0V to ground at pin #46. This is caused by an internal short to ground
in the IPDM or one of the IPDM fuses listed below is open.
If B12A3-72 is current or reoccurs after erasing DTCs, inspect the model specific fuse first.
If the fuse is not open replace the IPDM.
 Altima – Fuse # 58 (page 2)
 Kicks – Fuse # 54 (page 3)
 Versa – Fuse # 61 (page 4)
For additional IPDM diagnostic information refer to the Electronic Service Manual
(ESM): Section ELECTRICAL & POWER CONTROL > POWER CONTROL SYSTEM
> IPDM E/R.
See model specific fuse locations starting on page 2.
