Initial System Diagnosis

^ Determine type of audio complaint.
^ Try to duplicate condition (listen to AM or FM, start vehicle, put in a good CD or cassette, test switches, etc.).
^ Refer to Symptom Table for the appropriate diagnostic procedure(s).

NOTICE TO TECHNICIANS: Electromagnetic interference (EMI) can cause a fewer number of stations to be received in one of the three modes. The EMI can be caused by various vehicle components. This may be the cause of the differences in reception. Check for components powered up in the three various key positions. This may eliminate Engine-running components, Ignition-on components, etc. For example, if the same number of stations are received with the Engine running as when the Engine was off, the components active with the Engine running are not causing the interference.

IMPORTANT: For a better understanding of Retained Accessory Power (RAP) operation, refer to "Retained Accessory Power". Accessory Delay Module