Diagnostic Routine Q

Diagnostic Routine Q

Diagnostic Overview

The LF Door 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

DTC Fault Trigger Conditions






Pinpoint Test

1. CHECK THE AUDIO SIGNAL TO THE LF (Left Front) DOOR SPEAKER

1. Ignition OFF.

2. Disconnect: LF (Left Front) Door Speaker.

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

4. Measure:





Is a fluctuating AC (Alternating Current) voltage present?








2. CHECK THE AUDIO CIRCUITS TO THE LF (Left Front) DOOR SPEAKER FOR A SHORT TO VOLTAGE

1. Ignition OFF.

2. Disconnect: ACM (Audio Control Module) C240A.

3. Ignition ON.

4. Measure:





Is any voltage present?








3. CHECK THE AUDIO CIRCUITS TO THE LF (Left Front) DOOR 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 LF (Left Front) DOOR SPEAKER FOR AN OPEN

1. Measure:





Are the resistances less than 3 ohms?








6. CHECK FOR CORRECT ACM (Audio Control Module) OPERATION

1. Disconnect and inspect all ACM (Audio Control 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 ACM (Audio Control 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?