B147F-CHANNEL 7 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
(X300) AMPLIFIED SUBWOOFER 1 (+) CIRCUIT SHORTED TO GROUND
(X390) AMPLIFIED SUBWOOFER 1 (-) CIRCUIT SHORTED TO GROUND
AMPLIFIED SUBWOOFER SPEAKER ASSEMBLY
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 rear and center.

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

Does the scan tool display active: B147F-CHANNEL 7 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. CHECK THE AMPLIFIED SUBWOOFER SPEAKER FOR A SHORT TO GROUND

1.	Using the scan tool, erase the DTCs.

2.	Turn the ignition off.

3.	Disconnect the Subwoofer 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: B147F-CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

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

3. CHECK THE (X300) AMPLIFIED SUBWOOFER SPEAKER 1 (+) 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 (X300) Amplified Subwoofer 1 (+) circuit.

Is the resistance below 10K Ohms?

Yes

Repair the (X300) Amplified Subwoofer 1 (+) 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 (X390) AMPLIFIED SUBWOOFER SPEAKER 1 (-) CIRCUIT FOR A SHORT TO GROUND

1.	Measure the resistance between ground and the (X390) Amplified Subwoofer 1 (-) circuit.

Is the resistance below 10K Ohms?

Yes

Repair the (X390) Amplified Subwoofer 1 (-) circuit 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).