TM 5-2420-231-23-1
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TRANSMISSION CONTROLLER DIAGNOSTIC FAULTS
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The transmission controller is capable of self-monitoring and diagnosis. The diagnostic codes will be displayed
when the T-lamp is on and the mode button is pressed for more than 2 seconds. The display screen will first
illuminate the fault area, followed by the fault type.
Table 6. Transmission Diagnostic Faults.
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Fault
Fault Area
Fault Type
Direction Outputs Shutdown
Direction Outputs Forced to Plus or
Open Circuit
Limp Home Mode
Direction Modulator Output Open
Circuit or Short to Ground
Direction Modulator Output Short
Circuit