B147E JEEP - Channel 7 Audio Speaker Output

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Faulty Audio Amplifier
  • Audio Amplifier harness is open or shorted
  • Audio Amplifier circuit poor electrical connection

Tech notes

B147E-11 CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT SHORT TO GROUND
B147E-12 CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT SHORT TO BATTERY
B147E-13 CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT OPEN
B147E-92 CHANNEL 7 AUDIO SPEAKER OUTPUT PERFORMANCE OR INCORRECT OPERATION

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

B147e Jeep Description

The amplifier receives fused battery current from a fuse in the Power Distribution Center (PDC) at all times. The internal circuitry of the amplifier switches the amplifier on based upon a CAN-I bus message that is received from the Radio Receiver Module (RRM) whenever the RRM is turned on. The amplifier receives the sound signal inputs from the left and right rear outputs of the RRM, and then sends the amplified speaker outputs for each of those channels to the speakers.

The amplifier receives information from the Body Control Module (BCM) and RRM, that communicates the correct channel setting for optimum speaker sound and output.

There are two amplifiers available, an 8 channel, rated at 322 watts (7 channels are used) and a 12 channel (11 channels are used), rated at 506 watts.

OBDII Code B147e Jeep - Channel 7 Audio Speaker Output - AutoCodes.com

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