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.
YES
NO
TEST OPTIONS
WTEC III Transmission ECU
Reset Check
REASON FOR QUESTION
Main code 21 may appear on
WTEC III TPSS if voltage from
TPS WTEC III transmission
ECU is temporarily lost.
KNOWN INFO
Fuse OK.
Transmission oil level OK.
Batteries OK.
POSSIBLE PROBLEMS
Faulty WTEC III cab
transmission harness.
Faulty TPS cable assembly.
Faulty WTEC III transmission
ECU.
References
TM 9-4910-571-12&P
Personnel Required
(2)
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
2-1536 Change 1
f30. WTEC III TRANSMISSION PUSHBUTTON SHIFT SELECTOR (TPSS) DISPLAYS MAIN CODE
21 AND ANY SUB CODE