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 50
TM 9-2320-312-24-2
Troubleshooting Section
Neutral switch
Table 48
Manufacturer
Minimum
Maximum
Default
Output (No. 7)
121
km/h
48 km/h
121 km/h
The ECM must be programmed to one of the
GM
(75
(30 mph)
(75 mph)
following options if an Allison Wt Automatic
mph)
Transmission transmission is installed:
204
AT/MT/HT option 1
km/h
48 km/h
204 km/h
Other
(127
(30 mph)
(127 mph)
mph)
AT/MT/HT option 2
AT/MT/HT option 3
"Top Engine Limit (TEL)"
AT/MT/HT option 4
This parameter is the maximum engine rpm when
the engine is under load. The engine will still
If any other automatic transmission is installed, this
achieve rated rpm under no load conditions.
parameter should be programmed to one of the
following options:
Table 49
Minimum
Maximum
Default
Automatic Option 1
2640 rpm
2640 rpm
2640 rpm
Automatic Option 2
Note: Select ratings have a different "Top Engine
Automatic Option 3
Limit".
Automatic Option 4
"Low Idle Engine RPM"
If one of the manual options is selected, terminal
The "Low Idle Engine RPM" is the minimum engine
J1/P1:24 must receive a signal from a clutch pedal
rpm.
position switch or a message from a clutch switch
from one of the supported J1939 sources. If one of
Table 50
the transmissions with a neutral switch is selected,
Minimum
Maximum
Default
terminal J1/P1:62 must receive a signal from a
transmission neutral switch or a message from a
700 rpm
800 rpm
700 rpm
neutral switch from one of the supported J1939
sources. If one of the transmissions with two brake
"Idle Quality Calibration"
switches is selected, the second brake switch must
be connected to terminal J1/P1:64.
This parameter should not be adjusted without first
consulting a Caterpillar representative.
Table 51
Alternative
Default
Decrease 1, 2, 3, or 4,
Nominal
Increase 1, 2, 3, or 4
"Transmission Style"
(Full Feature Only)
This parameter is used to tell the ECM the type of
transmission that is installed in the vehicle. This
parameter is used by the ECM to read the signals
from the following devices:
Brake switch (No. 2)
Clutch switch
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