Speakers Inoperative - One or More

SPEAKERS INOPERATIVE - ONE OR MORE

DIAGNOSTIC SYSTEM CHECK - VEHICLE
Always perform the Diagnostic System Check - Vehicle before proceeding with these diagnostic procedures. Refer to Diagnostic System Check - Vehicle. Initial Inspection

ALL SPEAKERS INOPERATIVE

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause followed by the appropriate test for that condition. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with the replacement.

With RPO UM8 (Navigation)
1. Speaker output shorted-Test all speaker outputs for a short.
2. Defective radio-Replace the radio.

Without RPO UM8
1. Low level audio signal circuit shorted-Test all low level audio signal circuits for a short to ground or short to voltage.
2. No low level audio output from the radio-Test for any AC voltage between the left front low level audio signal circuits at the amplifier harness connector, disconnected with the radio volume adjusted to 50 percent. If no AC voltage is present, replace the radio.
3. No audio output from the amplifier-Replace the amplifier.

IMPORTANT: The following procedure assumes all speakers are operative for all modes of operation except digital radio.

With RPO U2K
1. Remote radio audio signal circuit shorted-Test the remote radio audio signal circuits for a short.
2. No audio output from the digital radio receiver-Replace the digital radio receiver.
3. No digital radio audio output from the radio-Replace the radio.

SPEAKERS - ONE CHANNEL INOPERATIVE

IMPORTANT:
- The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement.
- The following procedure assumes all speakers are operative for all modes of operation except digital radio.

With RPO U2K
1. Remote radio audio signal circuit open-Test the appropriate remote radio audio signal circuit for an open.
2. No audio output from the digital radio receiver-Replace the digital radio receiver.
3. No digital radio audio output from the radio-Replace the radio.

ONE SPEAKER INOPERATIVE

IMPORTANT: The following information lists the most probable cause of the concern to the least probable cause. If the list leads to the replacement of a component, always inspect for a poor connection before proceeding with replacement.

With RPO UM8
1. Speaker output open-Test the appropriate speaker output circuits for an open.
2. No audio output from the radio-Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the radio.

Without RPO UM8 or UQA
1. Speaker output open-Test the appropriate speaker output circuits for an open.
2. No audio output from the radio-Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the radio.

With RPO UQA (Bose)
1. Speaker output circuit from amplifier open or shorted-Test the appropriate speaker output circuits for an open or short.
2. No audio output from the amplifier-Test for any AC voltage between the appropriate speaker output circuits at the speaker harness connector, disconnected with the radio volume adjusted to an audible level. If AC voltage is present, replace the speaker. If no AC voltage is present, replace the amplifier.