Diagnostic Test

1) CHECK FOR AN INTERMITTENT CONDITION
Turn the ignition on, then off, and then on again.

With the scan tool, read Amplifier DTCs.

Does the scan tool display active: B1471-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT HIGH?

Yes
- Go to Step 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 - VER 1 .
2) CHECK FOR VOLTAGE ON THE (X154) AMPLIFIED RIGHT FRONT DOOR SPEAKER (-) CIRCUIT
Turn the ignition off.

Disconnect the Amplifier C2 harness connector.

Disconnect the Amplified Right Front Door Speaker harness connector.

Turn the ignition on.

Measure for voltage on the (X154) Amplified Right Front Door Speaker (-) circuit.

Is the voltage above 10.0 volts?

Yes
- Repair the (X154) Amplified Right Front Door Speaker (-) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1 .
No
- Go to Step 3.
3) CHECK FOR VOLTAGE ON THE (X156) AMPLIFIED RIGHT FRONT DOOR SPEAKER (+) CIRCUIT
Measure for voltage on the (X156) Amplified Right Front Door Speaker (+) circuit.

Is the voltage above 10.0 volts?

Yes
- Repair the (X156) Amplified Right Front Door Speaker (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST - VER 1 .
No
- Replace the amplifier in accordance with the service information.
- Perform the BODY VERIFICATION TEST - VER 1 .