TM-9-2320-365-20-3 LMTV Unit Maintenance Manual M1078 Series - Volume 3 Download
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TM 9-2320-365-20-3 8-4. WTEC II 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 9-2320-365-10). 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 II TEPSS. An active diagnostic code indicates a fault which is currently being detected by WTEC II TEPSS. 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 II TEPSS. • When an active diagnostic code is displayed on WTEC II TEPSS, the MODE ON light will be illuminated. (1) Enter diagnostic display mode by pressing ↑ (1) and ↓ (2) (up arrow and down arrow) buttons on WTEC II TEPSS (3) at the same time. 8-8