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B140C-2B-REAR RIGHT AUDIO SPEAKER OUTPUT - CIRCUIT SHORTED TOGETHER - PREMIUM





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

NOTE: There are two versions of the B140C-2B DTC test. In order to select the proper test you must know if the vehicle is equipped with an Amplifier. If the vehicle is equipped with an Amplifier use the B140C-2B-PREMIUM test. If the vehicle is not equipped with an Amplifier use the B140C-2B-BASE test.

Theory of Operation

The (X52) Right Rear Audio (+) circuit and the (X58) Right Rear Audio (-) circuit are outputs of the Telematics Gateway (TGW). The TGW 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 TGW detects that the output circuits are shorted together.





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

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

2. Using the scan tool, record and erase the TGW 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 25.
5. Adjust the speakers to the Rear and center.
6. Using the scan tool, read the active TGW DTCs.

Does the scan tool display active: B140C-2B-REAR RIGHT AUDIO SPEAKER OUTPUT - CIRCUIT SHORTED TOGETHER?

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 AMPLIFIER




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 Amplifier 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 TGW DTCs.

Does the scan tool display active: B140C-2B-REAR RIGHT AUDIO SPEAKER OUTPUT - CIRCUIT SHORTED TOGETHER?

Yes

- Go To 3

No

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

3. CHECK THE (X52) RIGHT REAR AUDIO (+) CIRCUIT, AND THE (X58) RIGHT REAR AUDIO (-) CIRCUITS FOR A SHORT TOGETHER




1. Disconnect the TGW harness connector.
2. Measure the resistance between the (X52) Right Rear Audio (+) circuit, and the (X58) Right Rear Audio (-) circuit.

Is the resistance below 10K Ohms?

Yes

- Repair the (X52) Right Rear Audio (+) circuit, and the (X58) Right Rear Audio (-) circuit for a short together.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the TGW. Telematics Gateway Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.