2012 Jeep Wrangler JK Factory Service Manual 28 - DTC-Based Diagnostics

B1402-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH

B1402-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH



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


Theory of Operation

The (X201) Left Front Speaker (+) circuit and the (X291) Left Front Speaker (-) circuit are outputs of the Radio. The Radio controls and monitors these circuits for a concern.


Possible Causes

(X201) LEFT FRONT SPEAKER (+) CIRCUIT
(X291) LEFT FRONT SPEAKER (-) CIRCUIT
RADIO

1. CHECK FOR AN INTERMITTENT CONDITION




NOTE: This vehicle has a Front Tweeter wired in parallel with the Front Speaker.
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 front and center.
5. Using the scan tool, read the active Radio DTCs.


Does the scan tool read: B1402-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH?

Yes


No


2. CHECK FOR VOLTAGE ON THE (X201) LEFT FRONT SPEAKER (+) CIRCUIT



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


Is there any voltage present?

Yes


No


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



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


Is there any voltage present?

Yes


No