TM-9-2320-366-20-4 MTV Unit Maintenance Manual M1083 Series - Volume 4 Download
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TM 9-2320-366-20-4 8-5. WTEC III CODE READING AND CODE CLEARING PROCEDURES This task covers: a. Reading Diagnostic Codes b. Clearing Active Diagnostic Codes c. Clearing Historic Diagnostic Codes d. Exiting the Diagnostic Display Mode e. Follow-On Maintenance INITIAL SETUP Equipment Conditions Master power switch positioned to on (TM 9-2320-366-10-1). a. Reading Diagnostic Codes. NOTE • Diagnostic codes may be viewed even while vehicle is moving. • There are two types of diagnostic codes, active and historic, which may be displayed on WTEC III TPSS. An active diagnostic code indicates a fault which is currently being detected by WTEC III TPSS. An historic diagnostic code represents a fault which was detected prior to engine shutdown. All active diagnostic codes, except main code 69 sub code 34, will become historic codes when electrical power is removed from WTEC III transmission ECU. • When an active diagnostic code is displayed on WTEC III TPSS, the Light Emitting Diode (LED) at upper right corner of MODE button will be illuminated. (1) Enter diagnostic display mode by pressing ↑ (1) and ↓ (2) (up arrow and down arrow) buttons on WTEC III TPSS selector (3) at the same time. 8-15