Copyright © 1998 General Motors Corp. P–23
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
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.
SERVICE BRAKE STATUS
USES: Indicates to the ECU whether vehicle braking is being provided by the retarder or vehicle brakes, so that
the transmission controls can be adapted accordingly.
VARIABLES TO SPECIFY: None
VOCATIONS: Various. This function is required for retarder-equipped transmissions.
This function is used in conjunction with Retarder Enable Input Function. Refer to
schematic for Input Function, noting the use of wire 137.
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