Detroit Diesel 60 Operator's Manual page 41

Figure 8 RSL/AWL Flashing Code Examples
Active Codes – The active codes will
be flashed on the RSL in the order of
most recent to least recent occurrence
based on engine hours. If there are no
active codes, a code 25 will be flashed.
Inactive Codes – The inactive codes
will be flashed on the AWL in the
order of most recent to least recent
occurrence based on engine hours. If
there are no inactive codes, a code 25
will be flashed.
Only One Light Flashes at a Time –
Only one light will be flashing codes
at any time. When code flashing is
initiated, the active codes (or code
25) will be flashed on the RSL. Then
the inactive codes (or code 25) will
be flashed on the AWL. When all the
inactive codes (or code 25) have been
flashed, the process of flashing all
the active codes followed by all the
inactive codes will repeat until the
All information subject to change without notice.
DDC-SVC-MAN-0039
SERIES 60 ON-HIGHWAY ENGINE OPERATOR'S GUIDE
Copyright © 2009 DETROIT DIESEL CORPORATION
conditions for code flashing are no
longer satisfied.
To Read Codes: Use the DDR or
press and hold the Diagnostic Test
Mode Switch with the ignition ON
and the engine AT IDLE or NOT
RUNNING. Press and hold the switch.
Active codes will be flashed on the
RSL first, followed by inactive codes
being flashed on the AWL.
The codes will continue to flash and
repeat as long as the diagnostic request
switch is held in the ON position with
the ignition on. Diagnostic codes are
listed on the following pages.
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