— 21 —What might seem to be a malfunction in your unit mayjust be the result of slight misoperation or miswiring.Before calling service, first check the following tablefor possible problems.General? The power does not turn ON.01✔ The fuse has blown.☞ After checking for short circuits in the wires, replace the fuse withone with the same rating.✔ No ACC position on vehicle ignition.02☞ Connect the same wire to the ignition as the battery wire.? Nothing happens when the buttons are pressed.04✔ The computer chip in the unit is not functioning normally.☞ Press the Reset button on the display unit (page 3).? No sound or sound is low.52✔ The O-N selection switch of the disc changer is not set properly.☞ Set the O-N selection switch to "N" position.✔ The radio volume is sets to the minimum level.3☞ Turn the radio volume up.✔ The input/output wire or wiring harness is connected incorrectly.55☞ Connect the input/output wire or wiring harness correctly. See"Connecting Wires to Terminals" (Page 18,19).? Sound distortion.67✔ The signal levels differ depending on sources.☞ Change the Modulation level / Dynamic control setting. (Page 13)? Nothing appears on the display.04✔ The control output of the display unit is not connected properly.☞ Connect the control output properly.Sirius source? The Sirius mode cannot be selected.2✔ The Sirius connection wire is not connected.☞ Use the Sirius connection wire to connect the control unit and theSirius satellite radio tuner.✔ Connect the power supply of the Sirius satellite radio tuner.53☞ Connect the battery wire and ground wire to the Sirius satelliteradio tuner.✔ The Sirius satellite radio tuner is not connected properly.55☞ Connect the Sirius satellite radio tuner directly to this unit.? No sound can be heard, or the volume is low.58✔ The input/output wires or wiring harness are connected incorrectly.☞ Reconnect the input/output wires and/or the wiring harnesscorrectly.? No broadcast can be received2✔ The Sirius antenna is not connected.☞ Connect it properly.✔ No subscription is established.53☞ Subscribe to SIRIUS.? No sound is heard even though the information concerning theSirius satellite radio tuner is displayed.67✔ The radio volume is sets to the minimum level.☞ Turn the radio volume up.✔ The microcomputer does not function correctly.68☞ Press the Reset button of the display unit.(Page 3)✔ The system is not connected properly.69☞ Connect the system properly. See Terminals>. (Page 18,19)Troubleshooting Guide