B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW

For a complete wiring diagram, refer to the Wiring Information.

When Monitored:
With the ignition on.
Set Condition:
The amplifier detects a shorted to ground condition on the speaker output circuit.

Possible Causes
(X201) LEFT FRONT SPEAKER (+) CIRCUIT SHORTED TO GROUND
(X291) LEFT FRONT SPEAKER (-) CIRCUIT SHORTED TO GROUND
LEFT FRONT SPEAKER
AMPLIFIER

1. CHECK FOR AN INTERMITTENT CONDITION

1.	Turn the ignition on.

2.	Using the scan tool, record and erase the Amplifier DTCs.

3.	Cycle the ignition switch from on to off, wait five seconds and then back to on.

4.	Turn the Radio on and set the volume to 25.

5.	Adjust the speakers to the front and center.

6.	Using the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

2. LEFT FRONT SPEAKER

1.	Using the scan tool, erase the DTCs.

2.	Turn the ignition off.

3.	Disconnect the Left Front Speaker harness connector.

4.	Turn the ignition on.

5.	Turn the radio on and set the volume to 25.

6.	Using the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

3. CHECK THE (X201) LEFT FRONT SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND

1.	Turn the ignition off.

2.	Disconnect the Amplifier C2 harness connector.

3.	Measure the resistance between ground and the (X201) Left Front Speaker (+) circuit.

Is the resistance below 10K Ohms?

Yes

Repair the (X201) Left Front Speaker (+) circuit for a short to ground.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

4. CHECK THE (X291) LEFT FRONT SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND

1.	Measure the resistance between ground and the (X291) Left Front Speaker (-) circuit.

Is the resistance below 10K Ohms?

Yes

Repair the (X291) Left Front Speaker (-) for a short to ground.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).

Replace the Amplifier in accordance with the Service Information.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).