B1481-CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT OPEN

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

When Monitored:
Amplifier BUS wake-up. Amplifier reset with scan tool.
Set Condition:
The Amplifier detects an open condition on the speaker output circuit.

Possible Causes
(X300) AMPLIFIED SUBWOOFER 1 (+) CIRCUIT OPEN
(X390) AMPLIFIED SUBWOOFER 1 (-) CIRCUIT OPEN
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: B1481-CHANNEL 7 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

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 OPERATION OF THE AMPLIFIED SUBWOOFER SPEAKER

1.	Turn the ignition off.

2.	Disconnect the Subwoofer Speaker harness connector.

3.	Turn the ignition on.

4.	Turn the radio on and turn the volume to 25.

5.	With a Voltmeter set to read in A/C voltage, measure the voltage of the Amplified Subwoofer Speaker 1 circuits in the Subwoofer Speaker harness connector.

Is the voltage above 1 Volt?

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 1 (+) CIRCUIT FOR AN OPEN

1.	Turn the ignition off.

2.	Disconnect the Amplifier C2 harness connector.

3.	Measure the resistance of the (X300) Amplified Subwoofer 1 (+) circuit between the Amplifier C2 harness connector and the Subwoofer Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

Repair the (X300) Amplified Subwoofer 1 (+) circuit for an open.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure) .

4. CHECK THE (X390) AMPLIFIED SUBWOOFER 1 (-) CIRCUIT FOR AN OPEN

1.	Measure the resistance of the (X390) Amplified Subwoofer 1 (-) circuit between the Amplifier C2 harness connector and the Subwoofer Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

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).

Repair the (X390) Amplified Subwoofer 1 (-) circuit for an open.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).