1.
Does main code 21 repeat
after code has been
manually cleared and
throttle counts reset?
CAUTION
Read CAUTION
on following page.
START
Fault corrected.
NO
YES
TEST OPTIONS
WTEC II TEPSS Reset Check
REASON FOR QUESTION
Main code 21 may appear on
WTEC II TEPSS if voltage from
TPS to WTEC II TEPSS is
temporarily lost.
KNOWN INFO
Fuse OK.
Transmission oil level OK.
Batteries OK.
POSSIBLE PROBLEMS
Faulty WTEC II cab
transmission harness.
Faulty TPS cable assembly.
Faulty WTEC II TEPSS.
References
TM 9-4910-571-12&P
Personnel Required
(2)
f12. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) DISPLAYS MAIN
CODE 21 AND ANY SUB CODE
INITIAL SETUP
Equipment Conditions
Engine shut down (TM 9-2320-365-10).
Tools and Special Tools
Tool Kit, Genl Mech (Item 44, Appendix C)
Multimeter, Digital (Item 22, Appendix C)
STE/ICE-R (Item 39, Appendix C)
TM 9-2320-365-20-2
2-1430 Change 1