WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
P–4 Copyright © 1998 General Motors Corp.
APPENDIX P — INPUT/OUTPUT FUNCTIONS
WARNING!
These schematics show the intended use of the specified controls features which
have been validated in the configuration shown. Any miswiring or use of these
features which differs from that shown could result in damage to equipment or
property, personal injury, or loss of life. ALLISON TRANSMISSION IS NOT
LIABLE FOR THE CONSEQUENCES ASSOCIATED WITH MISWIRING
OR UNINTENDED USE OF THESE FEATURES.
PTO ENABLE (USING “MODE” BUTTON)
USES:
Permits PTO to be engaged only when engine speed and output speed are in allowable range and throttle is
low. Also disengages PTO if speeds are exceeded.
VARIABLES TO SPECIFY:
Minimum and maximum engine speed for engagement, maximum engine speed for
allowable operation, minimum and maximum output speed for engagement, maximum output speed for
allowable operation.
VOCATIONS:
Various (with usage of PTO)
Figure P–4. PTO Enable (Using “MODE” Button)
F2
NC
COM
VIM
Relay shown de-energized
SWITCHED
POWER
DASH
LIGHT
PTO
PRESSURE
SWITCH
PTO
NO
F3
V05009
MODE
BUTTON
WIRE 112 PTO ENABLE
“PTO”
ECU
R
N
D
MODE
MODE ON
SELECT MONITOR
SERVICE
WARNING!
These schematics show the intended use of the specified controls features which
have been validated in the configuration shown. Any miswiring or use of these
features which differs from that shown could cause unscheduled operation of the
PTO or other unpredictable operation resulting in damage to equipment or
property, personal injury, or loss of life. ALLISON TRANSMISSION IS NOT
LIABLE FOR THE CONSEQUENCES ASSOCIATED WITH MISWIRING
OR UNINTENDED USE OF THESE FEATURES.
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