I got my Autoenginuity scanner. It seems to work fine, just have to play around with it for awhile to figure out what tests are most important.

I read 48.5 volts for FICM main power so thats good right? Injector buzz test passed. Battery voltage with key on engine off was 11.28, maybe not so good?

I did pull 3 codes so now have to figure out how to fix.


Pulling System DTCs 5 of 9
+ Communication: 3
+ System: GEM/Central Timer
Reporting 3 DTCs

-------------------------------------------------------------------------------
Code ID: 0x9483
+ Display Text: 'B1483 Brake Pedal Input Circuit Failure'
+ Code Type: Stored Code
+ Module: Manufacturer Specific
*** No Freeze Frame Associated with code ***
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Code ID: 0x1876
+ Display Text: 'P1876 Transfer Case 2-Wheel Drive Solenoid Circuit Failure'
+ Code Type: Stored Code
+ Module: Manufacturer Specific
*** No Freeze Frame Associated with code ***
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
Code ID: 0x1832
+ Display Text: 'P1832 Transfer Case Differential Lock-Up Solenoid Circuit Failure'
+ Code Type: Stored Code
+ Module: Manufacturer Specific
*** No Freeze Frame Associated with code ***

 

I'll bet your battery voltage was during glow plug "on" cycle.
It'll take up to 2 minutes for the glow plugs to go off.

 

I think you are right, just double checked with my Insight, got 11.2V glow plugs, 11.6V after they shut off and 13.2V running.

 

Those all seem a little on the low side, using my scangauge on
the ODBII port. You might double check via Digital volt meeter
on the battery(s) to be sure the ODBII port is close to actual.

I get 11.6 - 11.8 with glow plugs on, and then 13.9 -14.1 engine running.
I don't recall the voltages glow plugs off, engine not running.

 

Battery voltage need to be measured at the terminal of the battery.

KOEOff (glow plug on, buzz, fuel pump on)
KOEOff (glow plug only)
KOEOff cranking
KOEOn running first 2 min
KOEOn after 5 minutes (when glow plugs off)

Then another measure after driving 15 or 20 min.