B1472

B1472-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT OPEN





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Amplifier BUS wake-up. Amplifier reset with scan tool.

- Set Condition:
The amplifier detects an open condition on the speaker output circuit.





1. CHECK FOR AN INTERMITTENT CONDITION
1. Turn the ignition on and open one of the front doors.

NOTE: A front door must remain open whenever checking or erasing Amplifier DTCs.

2. With the scan tool, record and erase the Amplifier DTCs.
3. With the scan tool, reset the amplifier.
4. Turn the radio on and set the volume at 25.
5. Adjust the speakers to the front and center.
6. With the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B1472-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT OPEN?

Yes

- Go To 2

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE OPERATION OF THE AMPLIFIED RIGHT FRONT SPEAKER




1. Turn the ignition off.
2. Disconnect the Amplified Right Front Speaker harness connector.
3. Turn the ignition on.
4. Turn the radio on with the settings the same as in Step 1.
5. With a voltmeter set to read in A/C voltage, measure the voltage of the Amplified Right Front Door Speaker circuits in the Right Front Door Speaker harness connector.

Is the voltage above 1 volt?

Yes

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

No

- Go To 3

3. CHECK THE (X202) AMPLIFIED RIGHT FRONT DOOR SPEAKER (+) CIRCUIT FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Measure the resistance of the (X202) Amplified Right Front Door Speaker (+) circuit between the Amplifier C2 harness connector and the Right Front Door Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Go To 4

No

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

4. CHECK THE (X292) AMPLIFIED RIGHT FRONT DOOR SPEAKER (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (X292) Amplified Right Front Door Speaker (-) circuit between the Amplifier C2 harness connector and the Right Front Door Speaker harness connector.

Is the resistance below 2.0 Ohms?

Yes

- Replace the Amplifier.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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