SRT55D Off-Highway Truck
3-32
Safety, Operation and Maintenance Manual
Controls and Operating
shift to Neutral (N) and operate the engine
at 1200 - 1500 r/min. If the transmission
oil temperature does not decrease into the
green zone within 2 or 3 minutes, the cause
of the overheating should be corrected before
the machine is operated further. Watch the
oil temperature gauge when operating on
upgrades, also. If the oil temperature goes
into the red zone (165 -176°C; 329 - 350°F),
select the range which will limit upshifts to
the highest range in which the transmission
will operate within the normal temperature
range. If upshifting must be consistently
limited to ranges lower than normal for the
loads and the grades encountered to prevent
overheating the transmission oil, the causes
should be determined and corrected. On
trucks tted with a transmission retarder, it is
permissible to operate with the gauge showing
in the yellow zone, during operation of the
transmission retarder, but the operation can
not last for more 3 minutes, or damage to the
transmission may result.
3.13.4 Retrieving diagnostic codes
Diagnostic fault codes can be retrieved from
the CEC2 system using the gear shift selector
or by plugging in the diagnostic data reader
(DDR). To obtain diagnostic codes using the
gear shift selector::
※Check transmission warning light on dash
will illuminate when ECU detects a fault.
※Stop truck and select 'Neutral'.
※Press diagnostic button (1) on gear shift
selector. Display (2) on gear shift selector will
ash one digit at a time.
※Display starts with code position D1, D2,
etc, followed by the two digit main code, then
the two digit subcode.
※To advance to the next code, press the
mode button (3). Up to five codes can be
stored.
※Active codes are indicated by illumination of
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