TM-9-2320-366-20-2 MTV Unit Maintenance Manual M1083 Series - Volume 2 Download
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Replace WTEC II TEPSS (para 8-2).  YES  NO  9.  Are TPS wires free from  short circuits at connectors  J114 and J115?  TEST OPTIONS  Continuity Test or STE/ICE-R  Test #91  REASON FOR QUESTION  WTEC II TEPSS may display  main code 21 if wire is shorted  to another in the harness.  KNOWN INFO  Fuse OK.  Transmission oil level OK.  Batteries OK.  TPS cable assembly OK.  POSSIBLE PROBLEMS  Faulty WTEC II cab  transmission harness.  Faulty WTEC II TEPSS.  f12. WTEC II TRANSMISSION ECU PUSHBUTTON SHIFT SELECTOR (TEPSS) DISPLAYS MAIN  CODE 21 AND ANY SUB CODE (CONT)  TM 9-2320-366-20-2  2-1666 Change 1  Replace WTEC II cab transmission  harness (para 7-137).