B1473

B1473-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT SHORTED TOGETHER





For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:
- With the ignition on. Radio volume at 25 or higher.
- Set Condition:
- The amplifier detects that the output circuits are shorted together.





Diagnostic Test

1. CHECK FOR AN INTERMITTENT CONDITION

Turn the ignition on, then off, and then on again.

With the scan tool, erase Amplifier DTCs.

Turn the radio on.

Turn the volume level to 25.

With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1473-CHANNEL 4 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 BODY VERIFICATION TEST VER-1. Body Verification Test

2. CHECK THE OPERATION OF THE AMPLIFIED RIGHT FRONT DOOR SPEAKER





Disconnect the Amplified Right Front Door Speaker.

Measure the resistance of the speaker between the two terminals.

Is the resistance of the speaker less than 1 ohm?

Yes

- Replace the Amplified Right Front Door Speaker.
- Perform BODY VERIFICATION TEST VER-1. Body Verification Test

No

- Go To 3
-

3. CHECK THE (X154) AMPLIFIED RIGHT FRONT DOOR SPEAKER (-) CIRCUIT, AND THE (X156) AMPLIFIED RIGHT FRONT DOOR SPEAKER (+) CIRCUITS FOR A SHORT TOGETHER





Turn the ignition off.

Disconnect the Amplifier C2 harness connector.

Measure the resistance between the (X154) Amplified Right Front Door Speaker (-) circuit, and the (X156) Amplified Right Front Door Speaker (+) circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (X154) Amplified Right Front Door Speaker (-) circuit, and the (X156) Amplified Right Front Door Speaker (+) circuit for a short together.
- Perform BODY VERIFICATION TEST VER-1. Body Verification Test

No

- Replace the amplifier.
- Perform BODY VERIFICATION TEST VER-1. Body Verification Test