B146A-12

B146A-12-CHANNEL 3 AUDIO SPEAKER OUTPUT - CIRCUIT SHORT TO BATTERY





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

Theory of Operation

The (X201) Left Front Door Speaker (+) circuit and the (X291) Left Front Door Speaker (-) circuit are outputs of the Amplifier. The Amplifier controls and monitors these circuits for a concern when the ignition is cycled on.

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:
When the ignition is cycled on.

- Set Condition:
The Amplifier detects a short to battery condition on the speaker output circuit when the ignition is cycled on.





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. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Turn the Radio on.
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: B146A-12-CHANNEL 3 AUDIO SPEAKER OUTPUT - CIRCUIT SHORT TO BATTERY?

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 FOR VOLTAGE ON THE (X201) LEFT FRONT DOOR SPEAKER (+) CIRCUIT




1. Turn the ignition off.
2. Disconnect the Amplifier C2 harness connector.
3. Disconnect the Left Front Door Speaker harness connector.
4. Turn the ignition on.
5. Measure for voltage between the (X201) Left Front Door Speaker (+) circuit and ground.

Is there any voltage present?

Yes

- Repair the (X201) Left Front Door Speaker (+) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Go To 3

3. CHECK FOR VOLTAGE ON THE (X291) LEFT FRONT DOOR SPEAKER (-) CIRCUIT




1. Measure for voltage between the (X291) Left Front Door Speaker (-) circuit and ground.

Is there any voltage present?

Yes

- Repair the (X291) Left Front Door Speaker (-) circuit for a short to voltage.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

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