B146B

B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW





For a complete wiring diagram refer to 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: B146B-CHANNEL 3 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

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 - VER 1. Body Verification Test

2. CHECK THE (X209) AMPLIFIED LEFT FRONT SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND





Turn the ignition off.

Disconnect the Amplifier C1 harness connector.

Disconnect the Left Front Speaker harness connector.

Measure the resistance between ground and the (X209) Amplified Left Front Speaker (+) circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (X209) Amplified Left Front Speaker (+) circuit for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 3

3. CHECK THE (X299) AMPLIFIED LEFT FRONT SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND





Measure the resistance between ground and the (X299) Amplified Left Front Speaker (-) circuit.

Is the resistance below 10K ohms?

Yes

- Repair the (X299) Amplified Left Front Speaker (-) for a short to ground.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4. CHECK OPERATION OF THE AMPLIFIED LEFT FRONT SPEAKER





Reconnect and reinstall the Left Front Speaker.

Measure the resistance of the speaker circuit between the Amplifier C1 harness connector and ground.

Is the resistance below 10K ohms?

Yes

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

No

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