B1470

B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW





For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
- With the ignition on.
- Set Condition:
- The amplifier detects a shorted to ground condition on the speaker output circuit.





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: B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

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 (X154) AMPLIFIED RIGHT FRONT DOOR SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND




Disconnect the Amplifier C2 harness connector.
Disconnect the Right Front Door Speaker harness connector.
Measure the resistance between ground and the (X154) Amplified Right Front Door Speaker (-) circuit.
Is the resistance below 10K ohms?

Yes

- Repair the (X154) Amplified Left Front Door Speaker (-) circuit for a short to ground.
- Perform BODY VERIFICATION TEST VER-1.Body Verification Test

No

- Go To 3


3. CHECK THE (X156) AMPLIFIED RIGHT FRONT DOOR SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND




Measure the resistance between ground and the (X156) Amplified Right Front Door Speaker (+) circuit.
Is the resistance below 10K ohms?

Yes

- Repair the (X156) Amplified Right Front Door Speaker (+) for a short to ground.
- Perform BODY VERIFICATION TEST VER-1.Body Verification Test

No

- Go To 4


4. CHECK OPERATION OF THE AMPLIFIED RIGHT FRONT DOOR SPEAKER




Turn the ignition off.
Reconnect and reinstall the Right Front Door Speaker.
Measure the resistance of the speaker circuit between the Amplifier C2 harness connector and ground.
Is the resistance below 10K ohms?

Yes

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

No

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