B1472

B1472-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT OPEN

For a complete wiring diagram Consult Diagrams/Electrical.

- When Monitored:
- Amplifier BUS wake-up. Amplifier reset with scan tool.
- Set Condition:
- The amplifier detects an open condition on the speaker output circuit.





Diagnostic Test

1. CHECK FOR AN INTERMITTENT CONDITION
Turn the ignition on.
Turn the radio on.
With the scan tool, erase Amplifier DTCs.
With the scan tool, reset the amplifier.
With the scan tool, read Amplifier DTCs.
Does the scan tool display active: B1472-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

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 OPERATION OF THE AMPLIFIED RIGHT FRONT SPEAKER




Turn the ignition off.
Disconnect the Amplified Right Front Speaker harness connector.
Turn the ignition on.
Turn the radio on and turn the volume to mid level.
With a voltmeter set to read in A/C voltage, measure the voltage of the Amplified Right Front Speaker circuits in the Amplified Right Front Speaker harness connector.
Is the voltage present greater than 1 volt?

Yes

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

No

- Go to 3

3. CHECK THE (X202) AMPLIFIED RIGHT FRONT SPEAKER (+) CIRCUIT FOR AN OPEN
Turn the ignition off.
Disconnect the Amplifier C2 harness connector.
Measure the resistance of the (X202) Amplified Right Front Speaker (+) circuit between the Amplifier C2 harness connector and the Amplified Right Front Speaker harness connector.
Is the resistance below 5.0 ohms?

Yes

- Go to 4

No

- Repair the (X202) Amplified Right Front Speaker (+) circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK THE (X292) AMPLIFIED RIGHT FRONT SPEAKER (-) CIRCUIT FOR AN OPEN
Measure the resistance of the (X292) Amplified Right Front Speaker (-) circuit between the Amplifier C2 harness connector and the Amplified Right Front Speaker harness connector.
Is the resistance below 5.0 ohms?

Yes

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

No

- Repair the (X292) Amplified Right Front Speaker (-) circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test