Delco 808 Diag Info

[Justin Albury]

Just a little more info for those wanting to know


DIAGNOSTIC  MODES


Diagnostic                 Pins A-B                       Resistance
    Mode                 Voltage Drop             Applied Across A & B

Data List                      2.5V                                 10K
Field Service               0V                        0K (Shorted to
Earth)
ECM Back Up              1.5V                                 3.9K
Normal                         5.0V
Infinite


Terminal A is the ALDL Earth

Terminal B is the Diag Reguest enable which is pic A9 on the 808 which
is normaly at a 5V+ level

Terminal E is Serial Data Link/Check ing Light ........as for the check
engine light it is wired between A5 and 12+ via the ignition switch

Terminal F is the Torque Converter Clutch test point wired to A7

Terminal G is the Fuel Pump Test Point

Terminal H is Ignition feed for test gear


I hope this answers a few Questions

Juz!