Radio Locks Up And Or No Start Intermittent Dead Battery Equipped With US8 Or US9 Radios - keywords cd charge crank display draw inoperative low no

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Vehicles equipped with US8 and US9 radios may, in some conditions, lock up during vehicle start up. If this occurs the radio will no longer function. In addition there will be no radio display, no chime function, and limited or no CD functionality. The radio back lighting may or may not illuminate. Once a radio has entered this state it will remain locked up, and continue to draw power, until power is removed from the radio. This condition may result in a dead battery.

Do not replace the Radio for this concern. There is updated software available. Check the Radio software ID. If the software ID is 25814799, proceed with the normal diagnostic procedure. If the software ID is 25774458, program the radio with the updated software and/or calibration files using the TIS Service Programming System (SPS) application.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.