B1487

B1487-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER







- When Monitored:
With the ignition on. Radio volume at 25 or higher.

- Set Condition:
The Amplifier detects that the output circuits are shorted together.





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. With the scan tool, erase the DTCs.
3. Turn the radio on.
4. Turn the volume level to 25.
5. Adjust the speakers to the rear and center.
6. Adjust the Bass to mid level.
7. With the scan tool, read the active DTCs.

Does the scan tool display: B1487-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER?

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 SUBWOOFER SPEAKER




1. Turn the ignition off.
2. Disconnect the Subwoofer Speaker harness connector.
3. Measure the resistance between the Subwoofer Speaker (+) and (-) component terminals.

NOTE: The graphic shows the connector for reference only. Measure between the speaker terminals.

Is the resistance of the speaker below 1 Ohm?

Yes

- Replace the Subwoofer Speaker.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (X301) AMPLIFIED SUBWOOFER 2 (+) CIRCUIT FOR A SHORT TO THE (X391) AMPLIFIED SUBWOOFER 2 (-) CIRCUIT




1. Disconnect the Amplifier C2 harness connector.
2. Measure the resistance between the (X301) Amplified Subwoofer 2 (+) circuit and the (X391) Amplified Subwoofer 2 (-) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (X301) Amplified Subwoofer 2 (+) circuit for a short to the (X391) Amplified Subwoofer 2 (-) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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