Diagnostic Routine AF

Diagnostic Routine AF

Diagnostic Overview

The RH Or LH D-Pillar Speaker Is Inoperative Or Has Poor Sound Quality

Refer to Wiring Diagram Set 130 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

REFER to Digital Signal Processing (DSP) .

The audio DSP (Digital Signal Processing) module directs audio signals to the rear D-pillar speakers in the form of a fluctuating AC (Alternating Current) voltage. The RH (Right Hand) and the LH (Left Hand) D-pillar speakers share the same audio signal.

DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK THE AUDIO SIGNAL TO THE D-PILLAR SPEAKER

1. Ignition OFF.

2. Disconnect: Suspected D-Pillar Speaker.

3. Operate the audio system in radio tuner (AM/FM (Amplitude Modulation/Frequency Modulation)) mode.

4. Measure:
LH (Left Hand)





RH (Right Hand)





Is a fluctuating AC (Alternating Current) voltage present?








2. CHECK THE AUDIO CIRCUITS TO THE D-PILLAR SPEAKER FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: Audio DSP (Digital Signal Processing) Module C3154B.

3. Ignition ON.

4. Measure:





Is any voltage present?








3. CHECK THE AUDIO CIRCUITS TO THE D-PILLAR SPEAKER FOR A SHORT TO GROUND

1. Ignition OFF.

2. Measure:





Are the resistances greater than 10,000 ohms?








4. CHECK THE AUDIO CIRCUITS FOR A SHORT TOGETHER

1. Measure:





Is the resistance greater than 10,000 ohms?








5. CHECK THE AUDIO CIRCUITS TO THE D-PILLAR SPEAKER FOR AN OPEN

1. Measure:
LH (Left Hand)





RH (Right Hand)





Are the resistances less than 3 ohms?








6. CHECK FOR CORRECT AUDIO DSP (Digital Signal Processing) MODULE OPERATION

1. Disconnect and inspect all audio DSP (Digital Signal Processing) module connectors.

2. Repair:

- corrosion (install new connector or terminals- clean module pins)
- damaged pins - install new terminals/pins
- pushed-out pins - install new pins as necessary

3. Reconnect the audio DSP (Digital Signal Processing) module connectors. Make sure they seat and latch correctly.

4. Operate the system and determine if the concern is still present.

Is the concern still present?