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
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. Turn the radio on.
3. With the scan tool, erase the Amplifier DTCs.
4. With the scan tool, reset the Amplifier.
5. With 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 AMPLIFIED LEFT REAR SPEAKER




1. Turn the ignition off.
2. Disconnect the Amplified Left Rear Speaker harness connector.
3. Turn the ignition on.
4. Turn the radio on and turn the volume to mid level.
5. Adjust the speakers to the rear and center.
6. With a voltmeter set to read in A/C voltage, measure the voltage of the Amplified Left Rear Speaker circuits in the Amplified Left Rear Speaker harness connector.

Is the voltage present greater than 1 volt?

Yes

- Replace the Amplified Left Rear Speaker.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (X303) AMPLIFIED 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 (X303) Amplified Left Rear Speaker (+) circuit between the Amplifier C2 harness connector and the Amplified Left Rear Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (X303) Amplified Left Rear Speaker (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (X393) AMPLIFIED LEFT REAR SPEAKER (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (X393) Amplified Left Rear Speaker (-) circuit between the Amplifier C2 harness connector and the Amplified Left Rear Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

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

No

- Repair the (X393) Amplified Left Rear Speaker (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.