Hey guys

Anyone got a wiring diagram for these fellas? Nissan L01 dead short on the back up/others fuse, blows immediately when ignition turned on, error 22, no drive, no power to transmission solenoid.

Swapped out direction lever but no go.

Just reading these comments and I'm wondering if I have a dead short in the meter panel or if anyone knows where the "back up/others" fuse wiring goes to?

Disconnect the usual suspects like reverse alarm and lights etc but the short is still there.

Thanks.

the printed circuit board in meter panel is where 1 of the 2 can bus termination resistors is actually located, you get this code and or no drive when the solder heats up and gets loose. in this case I would say it was more likely the plug than the resistor, but heck, as long as it is fixed...

well after checking out a wiring diagram replacing the meter panel might be a last chance repair as the signals from the directional control do go through it. The info i presented earlier was based on the information i had based on what cat did to deal with it on their trucks, no mention of a meter panel replacement was in there so i ignored that possibility, my mistake i guess :o)
That wiring diagram does show a signal processor in the meter panel and that might be the problem, some kind of fault in it.
If your problem went away and it's been a week now i think it would be safe to say it is fixed. ;o)

good job

Labatts's or Moose Head on tap only!

ok found problem
METER PANEL replaced panel and now truck has been ok for about one week

will let you all know if issue comes back but so far ok (crossed fingers)
thanks
swoop223 and RCAV8TOR
beers on me if get up this way

will try tomorrow let u know

Just for schitzels and giggles, swap out the meter panel and then the vcm with known good ones.

all fuses and relays have been swapped with known good
trans solenoid replaced with new
?

Have you checked your fuses and relays ? I had a P22 with a open fuse once. I am not sure , but I think it was a VCM fuse.

it is not mechanical, this is an electrical fault
i would check the directional switch and transmission solenoids closely.
I know on some directional circuits they have diodes inline with the solenoids, i would check to see if there are any in the harness going to the directional solenoids and see if they are open or shorted.
According to how the ecm monitors these signals if they are open too long or activated at the same time for too long it will trigger this code.

sorry guys I entered wrong m#

correct Nissan M# MPL02A25LV
S/N#PL02-9H2136

I have also disconnected
all back alarms etc
I have tried to follow the above procedure as per the manual but the unit code p22 is always on at start up unable to monitor shift values as the code is active
any more ideas guys I now have the dealership involved and they are just as confused --
if there is an internal mechanical issue binding a clutch pack or over pressurizing a valve in the fwd/rev could this do it ?

This is from a service gram from cat on this system, the same rules should apply to this nissan system so use your own interpretation here on how to proceed with the diagnosis.

They are using the diagnozer program to do the monitoring so you will have to find another way to monitor these signals.

DTC P22 or P-22; Shift Lever Error Signal.

This DTC can mean that no shift lever input signal was detected for 2 seconds of time after the shift was made. This code can also set if duplicated shift lever inputs are detected by rapid shifting of the lever (creates a phantom code through hysteresis).

This code can also be generated when the Presence Detection System (PDS) is activated with the seat switch open.

Operate the truck while switching directions ( normal switching ). If the code returns then inspect for actual 'on' and 'off' activation of the transmission (T/M) shift solenoids. View them from the VCM input monitor page. View the operation of the directional lever while switching directions. Now view the transmission directional solenoid current (mA) during directional switching. There should be12 VDC applied and then removed from the solenoids.
.
Now, switch to the output monitor page. View the transmission (T/M) signal (neutral position) and then T/M solenoid "F" and then "R" while switching. If these are receiving input and output signals, then the system is working.
If one direction does not receive an input signal, check the wiring between the directional switch and the appropriate transmission shift solenoid. If there is a issue on the reverse side, you must also check the wiring from the reverse shift solenoid to the directional control and also to the backup alarm relay, fuse, wiring, etc.

good luck :o)

If you have verified you have the correct switch, and as shovel fx posted, check your meter panel as it sends the signal to the VCM via can bus.

Have you checked the seat switch and related wiring? I think that can cause a P 22 if it is open. I think there was some dash display issues that caused no travel. I know CAT and MITS had a PSB several years ago not sure if that gave a P 22.

my understanding is that the f-16 code is for when you get more than 1 directional control signal to the VCM, from the switch, the p-22 is for -no- signal from the switch for any direction or neutral,,, so these are a bit different codes... but both troubleshooting starts at the inputs/outputs from the directional switch.