• The MODE button will enable secondary shift point to be selected. This
is commonly referred to as “Economy.” It is further used by the serv-
ice technician to access diagnostic codes when troubleshooting. The
diagnostic circuitry must be enabled to display.
The electronic control system is programmed to inform the operator of a
problem with the transmission system and automatically take action to pro-
tect the operator, motorhome and transmission. When the Electronic Control
Unit (ECU) detects a DO NOT SHIFT (DNS) condition the ECU restricts
shifting, turns the CHECK TRANS light on the instrument panel and regis-
ters a diagnostic code.
NOTE: For some problems, diagnostic codes may be registered without
the ECU activating the CHECK TRANS light. An Allison Transmission
authorized service outlet should be consulted whenever there is a trans-
mission related concern. They have the equipment to check for diagnos-
tic codes and to correct problems which arise.
Each time the engine is started the CHECK TRANS will light, then turn
off after a few seconds. This momentary lighting is to show that the status
light circuits are working properly. If the CHECK TRANS light does not
illuminate during start up, or if the light remains on after start up, the system
should be checked immediately.
Continued illumination of the CHECK TRANS light during vehicle oper-
ation (other than start up) indicates that the ECU has signaled a diagnostic
code. Illumination of the CHECK TRANS light is accompanied by a flash-
ing display from the shift selector. The shift selector display will show actual
range attained and the transmission will not respond to shift selector requests.
Indications from the shift selector are provided to inform the operator that
the transmission is not performing as designed and is operating with reduced
capabilities. Before turning the ignition off, the transmission may be operated
for a short time in the selected range in order to “limp home” for service
assistance. Service should be performed immediately in order to minimize
potential for damage to the transmission.
When the CHECK TRANS light comes on and the ignition switch is
turned off, the transmission will remain in N (Neutral) until the condition
causing the CHECK TRANS light is corrected. Generally, while the CHECK
TRANS light is on, upshifts and downshifts will be restricted and direction
changes will not occur. Lever and push-button shift selectors do not respond
to any operator shift request while the CHECK TRANS light is illuminated.
The lockup clutch is disengaged when transmission shifting is restricted or
during any critical transmission malfunction.
Chassis Information
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S I G N A T U R E
1 0 • 2 9 2
Transmission
- Check Light
Содержание SIGNATURE 2001 series
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Страница 73: ...Driving Safety SIGNATURE SERIES 2 7 3 NOTES...
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Страница 99: ...Care Maintenance SIGNATURE 3 9 9 NOTES...
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Страница 317: ...Chassis Information SIGNATURE 1 0 3 1 7 Date Mileage Dealer Address Service Remarks CHASSIS LOG...
Страница 318: ...Chassis Information SIGNATURE 1 0 3 1 8 Date Mileage Dealer Address Service Remarks CHASSIS LOG...
Страница 319: ...Chassis Information SIGNATURE 1 0 3 1 9 Date Mileage Dealer Address Service Remarks CHASSIS LOG...
Страница 320: ...Chassis Information SIGNATURE 1 0 3 2 0 Date Mileage Dealer Address Service Remarks CHASSIS LOG...