B1470

B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW





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

Theory of Operation

The (X202) Right Front Door Speaker (+) circuit and the (X292) Right Front Door Speaker (-) circuit are outputs of the Amplifier. The Amplifier controls and monitors these circuits for a concern.

For a detailed description of the Audio System. Audio And Video - Description.

For additional information regarding the operation of the Audio System. Audio And Video - Operation.

- When Monitored:
With the ignition on.

- Set Condition:
The Amplifier detects a shorted to ground 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. Using the scan tool, record and erase the Amplifier DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Turn the Radio on and set the volume to 20.
5. Adjust the speakers to the front and center.
6. Using the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

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 BODY VERIFICATION TEST. Body Verification Test.

2. CHECK THE RIGHT FRONT DOOR SPEAKER




1. Make sure one of the front doors is still open.
2. Using the scan tool, erase the DTCs.
3. Turn the ignition off.
4. Disconnect the Right Front Door Speaker harness connector.
5. Turn the ignition on.
6. Turn the radio on and set the volume to 25.
7. Using the scan tool, read the active Amplifier DTCs.

Does the scan tool display active: B1470-CHANNEL 4 AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

- Go To 3

No

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

3. CHECK THE (X202) RIGHT FRONT DOOR SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Amplifier C1 harness connector.
3. Measure the resistance between ground and the (X202) Right Front Door Speaker (+) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (X202) Right Front Door Speaker (+) circuit for a short to ground.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 4

4. CHECK THE (X292) RIGHT FRONT DOOR SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (X292) Right Front Door Speaker (-) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (X292) Right Front Door Speaker (-) for a short to ground.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

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