The count is wrong. The fifth attempt to operate the headlights advances the retry counter
by 1. Eventually, this counter could reach 20, which means the IPDM has recorded 100
retries (20 times 5). If the retry counter hits 20, it bumps the circuit malfunction reading from
0 to 1. Now the system permanently
shuts off the power supply to the failing circuit; for
example, it’s the headlights. If this happens, there’s no way to reset the IPDM with a scan
tool or other procedure. Instead, you must repair the circuit and replace the IPDM.
This does not pertain to an open circuit! This counting condition only occurs on what would
normally blow a fuse. An open circuit would be a blown bulb as well. This will not set any
counter for a failed attempt, because there is no short that caused the Smart FET to turn off. SO, if the failed side is just because the circuit is open, it will not advance any counters.
For one thing, on the 5th attempt to use the headlamp, and there is a short, the smart FET
system sets a DTC for the shorted circuit and
shuts off power to the headlight circuit.
What’s more, the power remains off until the person shuts off the ignition switch and turns
it back on again.
You get 5 attempts per key-on cycle, before it sets the retry counter by +1. If you turn the
car off, before the 5th try, it will not +1 the retry counter the next time you key on and turn
the headlamps on.. The attempts counter gets set to 0 when you turn the car off. So, the
chances of reaching 20, for 100 tries, would mean you would have to use all five attempts
at once, every key on cycle, 20 consecutive times. As said, only for a short.
Need both lo-beams? You would need to hook a relay up to the working headlamp, and
have the replay power the other bulb until you can get it fixed. I have done this before, and
it works. Splice power from the working bulb, to pin 85 of the relay (coil), then pin 86 (coil)
to ground. Battery Power to pin 30, then pin 87 to one of he bulb socket wires, then the
other lead to ground. You would need to buy a H11 socket with two wires so you can do it.
I had to do this with a buick, and it's still jumped like that to this day. He never got his
SO, when you turn the headlamps on, the relay latches, and powers the other bulb from a
separate power source. The jumped circuit is removable. Also, since you will not be
powering the headlamps on and off 5-times with they key on cycle, the retry counter will not
advance if there IS a short.
You can also use lower (55) watt as hi-beam bulbs, and run with the hi-beams on, and
unplug the other lo-beam bulb.
Anyway, here is an interior fuse diagram in case you need one:
2020 Nissan Altima fuse box diagram - StartMyCar
- Interior Fuses.