Q: How to service the radio antenna cable on 2007 Scion tC?
A: Service operations on the radio antenna cord must begin by disconnecting the negative battery cable then waiting at least 90 seconds to avoid Air Bag and seat belt pretensioner activation. Proceed by removing the tonneau cover assembly, deck board sub-assembly, back door scuff plate, deck floor boxes (LH and RH), rope hook assembly, rear No. 1 floor board, seat track bracket cover (outer and inner RH), front seat assembly (RH), rear seat cushion assembly, rear seatback assembly (RH), lap belt outer anchor cover, front seat outer belt assembly (RH), front door scuff plate (RH), luggage compartment trim hooks (No. 1 and No. 2), side trim assembly (No. 1 RH), deck trim side panel assembly (RH), shift lever knob sub-assembly (for Manual Transaxle), upper console panel, console upper rear panel sub-assembly, console box rear assembly, and instrument cluster finish panel assembly. Detach the antenna cord assembly by both removing its bolt and unclamping all of its clamps. For installation, attach all clamps and install the antenna cord sub-assembly with the bolt, followed by the reinstallation of the instrument cluster finish panel assembly, rear console box assembly, console upper rear panel sub-assembly, upper console panel, shift lever knob sub-assembly (for Manual Transaxle), deck trim side panel assembly (RH), luggage compartment trim hooks (No. 2 and No. 1), side trim assembly (No. 1 RH), front door scuff plate (RH), front seat outer belt assembly (RH), lap belt outer anchor cover, rear seatback assembly (RH), rear seat cushion assembly, front seat assembly, seat track bracket covers (inner and outer RH), rear No. 1 floor board, rope hook assembly, deck floor boxes (RH and LH), back door scuff plate, deck board sub-assembly, and finally reconnect the cable to the negative battery terminal. A system initialization step is needed after disconnecting or connecting the negative battery cable because some systems require activation.