B1486

B1486-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT OPEN







- 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 DTCs.
4. With the scan tool, reset the Amplifier.
5. With the scan tool, read the active DTCs.

Does the scan tool display: B1486-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

Yes

- Go To 2

No

- The condition that caused this symptom is currently not present. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also, inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals. Repair as necessary.
- 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. Turn the ignition on.
4. Turn the radio on and turn the volume to 25.
5. Adjust the speakers to the rear and center.
6. Adjust the Bass to mid level.
7. With a voltmeter set to read in A/C voltage, measure the voltage of the Subwoofer Speaker circuits in the Subwoofer Speaker harness connector.

Is the voltage above 1 volt?

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 AN OPEN




1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Measure the resistance of the (X301) Amplified Subwoofer 2 (+) circuit between the Amplifier C2 harness connector and the Subwoofer Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

- Repair the (X301) Amplified Subwoofer 2 (+) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK THE (X391) AMPLIFIED SUBWOOFER 2 (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (X391) Amplified Subwoofer 2 (-) circuit between the Amplifier C2 harness connector and the Subwoofer 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 (X391) Amplified Subwoofer 2 (-) circuit for an open.
- Perform the BODY VERIFICATION TEST. Body Verification Test.