B1477

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.





1. CHECK FOR AN INTERMITTENT CONDITION

NOTE: This vehicle has a Rear Tweeter wired in parallel with the Rear Speaker.

1. Turn the ignition on and open one of the front doors.

NOTE: A front door must remain open whenever checking or erasing Amplifier DTCs.

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 20.
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

- Go To 2

No

- 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. Body Verification Test.

2. CHECK THE OPERATION OF THE LEFT REAR SPEAKERS




1. Make sure one of the front doors is still open.
2. Using the scan tool, erase the DTCs.
3. Turn the ignition off.
4. Disconnect the Left Rear Speaker harness connector from the Left Rear Speaker.
5. Disconnect the Left Rear Speaker harness connector from the Left Rear Tweeter.
6. Turn the ignition on.
7. Turn the radio on and set the volume to 25.
8. 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 and the Left Rear Tweeter connectors.

Is the voltage present greater than 1 Volt in each of the connectors?

Yes

- Replace the Left Rear Door Speaker. An open Tweeter will not set this code.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

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 connectors at the Speaker and the Tweeter.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (X205) Left Rear Speaker (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

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 connectors at the Speaker and the Tweeter.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Amplifier.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (X295) Left Rear Speaker (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.