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Pinpoint Test AP : The Cruise Control RECONFIGURABLE Telltale (RTT) Is Never On: Notes

Normal Operation and Fault Conditions 

See Cruise Control Message Center Indicator. Refer to Information And Message Center .

NOTE: If DTC U0100:00 sets in the IPC, other observable symptoms can be an inoperative speedometer, tachometer or odometer.

If the cruise control status display message is missing or invalid for less than 5 seconds, the IPC defaults the cruise control Reconfigurable Telltale (RTT) to the last indication state (on or off) based upon the last message received.

If the cruise control status display message is missing or if the data is deemed invalid by the IPC for 5 seconds or longer, the IPC sets DTC U0100:00 in continuous memory and defaults the cruise control Reconfigurable Telltale (RTT) off.

Possible Sources 

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