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Home >> Cadillac >> 2011 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1345 (Power Take-Off System) >> Description and Operation >> Power Take-Off (PTO) Description and Operation >> Modes of Operation >> PTO - Variable Mode
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PTO - Variable Mode

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, and 2009 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

In this mode, the vehicle can be programmed for stationary or mobile operation.

The variable PTO mode controls engine speed and PTO load engagement is selected by either the PTO in-cab or remote switches. Engine speed selection is variable between base engine idle speed and a maximum of 2100 RPM.

In the mobile PTO mode, the vehicle will operate at a vehicle speed resulting from the current PTO engine speed request and current transmission gear range selected.

Vehicle speed stability is greatly improved by shifting into the transmission manual mode because upshifts are limited. This reduces the maximum vehicle speed while allowing high engine speed operation. Therefore, low vehicle speed operation, 16-40 km/h (10-25 mph) and high PTO engine speed 1500-2000 RPM can be achieved in the manual mode 1 and 2 transmission ranges.

In-cab PTO Switch Operation:

PTO State Applied Switch Short Apply Long Apply
PTO STANDBY ENABLED RES + Tap Up (Engaged) Accelerate (Engaged)
PTO STANDBY ENABLED SET - Engaged Engaged
PTO ENGAGED (RPM already higher than standby) SET - Tap Down Coast
PTO ENGAGED (RPM already lower than maximum speed) RES + Tap Up Accelerate
STANDBY DISABLED with no memory speed RES + No Action No Action
STANDBY DISABLED with a memory speed RES + Resume Resume
STANDBY ENABLED with no memory speed RES + Tap Up (Engaged) Resume
STANDBY ENABLED with a memory speed RES + Resume Resume