B140B-REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN - PREMIUM
B140B-REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN - PREMIUM
For a complete wiring diagram, refer to the Wiring Information.
NOTE:
There are two versions of the B140B 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 B140B-PREMIUM test. If the vehicle is not equipped with an Amplifier use the B140B-BASE test.
Theory of Operation
The (X51) Left Rear Audio (+) circuit and the (X57) Left Rear Audio (-) circuit are outputs of the Radio. The Radio controls and monitors these circuits for a concern.
When Monitored:
With the Radio on.
Set Condition:
The Radio detects an open condition on the audio output circuit.
Possible Causes
(X51) LEFT REAR AUDIO (+) CIRCUIT OPEN
(X57) LEFT REAR AUDIO (-) CIRCUIT OPEN
AMPLIFIER
RADIO
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 Radio DTCs.
2.
Using the scan tool, record and erase the Radio DTCs.
3.
Turn the Radio on.
4.
Adjust the speakers to the rear and center.
5.
Using the scan tool, read the active Radio DTCs.
Does the scan tool read: B140B-REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN?
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.
