B1477-CHANNEL 5 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
(X205) LEFT REAR SPEAKER (+) CIRCUIT OPEN
(X295) LEFT REAR SPEAKER (-) CIRCUIT OPEN
LEFT REAR 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 rear and center.

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

Does the scan tool display active: B1477-CHANNEL 5 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 LEFT REAR SPEAKER

1.	Using the scan tool, erase the DTCs.

2.	Turn the ignition off.

3.	Disconnect the Left Rear Speaker harness connector from the Left Rear Speaker.

4.	Turn the ignition on.

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

6.	With a Voltmeter set to read in A/C voltage, measure the voltage between the (X205) Left Rear Speaker (+) circuit and the (X295) Left Rear Speaker (-) circuits in the Left Rear Speaker connector.

Is the voltage present greater than 1 Volt in the Left Rear Speaker connector?

Yes

3. CHECK THE (X205) LEFT REAR SPEAKER (+) CIRCUIT FOR AN OPEN

1.	Turn the ignition off.

2.	Disconnect the Amplifier C2 harness connector.

3.	Measure the resistance of the (X205) Left Rear Speaker (+) circuit between the Amplifier C2 harness connector and the Left Rear Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

Repair the (X205) Left Rear Speaker (+) 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 (X295) LEFT REAR SPEAKER (-) CIRCUIT FOR AN OPEN

1.	Measure the resistance of the (X295) Left Rear Speaker (-) circuit between the Amplifier C2 harness connector and the Left Rear 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 (X295) Left Rear Speaker (-) circuit for an open.
Perform the BODY VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure).