W T E C I I E L E C T RO N I C C O N T RO L S T RO U B L E S H O OT I N G M A N UA L
P–18
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.
MANUAL LOCKUP
USES: Provides for the manual application of the lockup clutch for non-roading applications. Uses two inputs:
one to select manual versus automatic lockup shift mode, and the second as the switching mechanism to
command the lockup clutch on and off.
VARIABLES TO SPECIFY: None
VOCATIONS: Oil field pumping, mud pumps, hoists, drilling
Figure P–18. Manual Lockup
WARNING!
If this function is enabled in the shift calibration, the function MUST be
integrated into the vehicle wiring. If the function is available in the shift
calibration but will not be used in the vehicle, it MUST be disabled in the
calibration.
V05023
WIRE 154
MANUAL LOCKUP ENABLE
WIRE 161B SIGNAL GROUND
WIRE 155 MANUAL LOCKUP
SWITCH 1
AUTOMATIC/MANUAL
LOCKUP
OPERATING PROCEDURE
SWITCH 1
OPEN
OPEN
CLOSED
CLOSED
SWITCH 2
OPEN
CLOSED
OPEN
CLOSED
Normal Auto Lockup Operation
Normal Auto Lockup Operation
Converter Operation Only
Lockup Operation Only
SWITCH 2
LOCKUP ON/LOCKUP OFF
NOTE: This function must NOT be used when the
transmission is used for vehicle propulsion.
12
9
13
ECU
VIW
CONNECTOR