Banks Power Chevy_GMC Trucks: Duramax LMM (Diesel ’07 - 10 6.6L) Tuner- Six-Gun Diesel Tuner '07-09 (PDA) Compatible w_ Optional PowerPDA - Manual (Page 23)

96508 v.7.0
23
Six-Gun Troubleshooting using the
Tuner’s LEDs.
(With or without a Banks PowerPDA
Installed)
If you feel that your Six-Gun Diesel
Tuner is not functioning properly,
some diagnostics can be performed.
Your Six-Gun Diesel Tuner is equipped
with diagnostic features that will
detect and display certain errors.
Remove the Six-Gun Diesel Tuner from
it’s mounting location while keeping
all connectors plugged in, and position
it in such a way that you can view
the end of the Six-Gun housing that
contains the LEDs from the driver’s
seat. Turn the vehicle key to the
ON position. Observe the two LEDs
mounted on the end of the Six-Gun
Diesel Tuner:
• A steady GREEN LED will illuminate
if all wire connections are correct,
the engine is running, and the engine
coolant temperature is within it’s
normal operating range.
• The GREEN LED will flash if all wire
connections are correct, the engine
is running, but the engine coolant
temperature is not within it’s normal
operating range. The GREEN LED will
stop flashing once the engine coolant
temperature is within it’s normal
operating range (not to be confused
with Speed-Loader flash on power-up).
• No LEDs will illuminate if the fuse
on the Six-Gun wiring harness is
blown or the wiring harness is not
properly connected. If the fuse and all
connections are okay, contact Banks
Technical Service.
• The RED LED will flash in a certain
sequence if a connection is incorrect
or if there is a problem with the
system – this sequence will identify
one or more diagnostic codes. A Six-
Gun Diesel Tuner’s diagnostic code
is comprised of 2 digits. Each code
is expressed in a sequence of 2 sets
of the flashing red LED separated by
a brief flashing of the green LED in
between. Each set of a number of red
LED flashes represents a digit. A longer
flashing of the green LED separates
the sequences. The LEDs will continue
to flash to display all the errors, and
then repeat. Table 1 lists common
diagnostic codes. For example, if a
faulty thermocouple is detected (code
“2,3”) by the Six-Gun Diesel Tuner, the
following red and green LED flashing
sequence is observed when the key
is on:
(1) Two times flashing RED LED
(2) One time quick flashing GREEN LED
(3) Three times flashing RED LED
(4) One time longer flashing GREEN
LED
The above flashing sequence will
repeat continuously. When the
problem is corrected, the diagnostic
code will be eliminated and replaced
by a steady green light. If the problem
persists, contact Banks Technical
Service.
Note: If multiple codes are set, they
will be displayed in a series separated
by the longer flashing green LeD. When
reading codes, make sure to watch
the entire series until you see the first
code repeat.
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