B1487

B1487-CHANNEL 8 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER

For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- 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, then off, and then on again.
2. Using the scan tool, erase Amplifier DTCs.
3. Turn the radio on.
4. Turn the volume level to 25.
5. Using the scan tool, read Amplifier DTCs.

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

Yes

- Go To 2

No

- The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE OPERATION OF THE CENTER INSTRUMENT PANEL SPEAKER




1. Disconnect the Center Instrument Panel Speaker.
2. Measure the resistance of the speaker between the two terminals.

Is the resistance of the speaker less than 1 Ohm?

Yes

- Replace the Center Instrument Panel Speaker.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK THE (X200) CENTER INSTRUMENT PANEL SPEAKER (+) CIRCUIT, AND THE (X290) CENTER INSTRUMENT PANEL SPEAKER (-) CIRCUITS FOR A SHORT TOGETHER




1. Turn the ignition off.
2. Disconnect the Amplifier C1 harness connector.
3. Measure the resistance between the (X200) Center Instrument Panel Speaker (+) circuit, and the (X290) Center Instrument Panel Speaker (-) circuit.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (X200) Center Instrument Panel Speaker (+) circuit, and the (X290) Center Instrument Panel Speaker (-) circuit for a short together.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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