The audio system sends serial data to the instrument cluster along the secondary serial data bus, circuit 1061. DTC 15 will set if there is no RADIO data message on the bus for more than 10 seconds. In practice the trouble code is set somewhere between 10 and 20 seconds after the last RADIO data message is received by the instrument cluster. The DTC is reset within 10 seconds of the arrival of a RADIO data message on the bus. The DTC is logged as a History DTC. If the vehicle is fitted with an aftermarket entertainment system, DTC 15 will always be set.

By manipulating the harnesses at the various connectors it is often possible to isolate the cause of the circuit interruption. This harness can then be removed and repaired. Inspect for any damage to the harness which could cause an intermittent open or short to ground or backed out terminals at the instrument cluster connectors, broken connector locks, improperly formed or damaged terminals. The multimeter allows continuity of the wiring harness circuit 1061 to be checked.