Rear Left Audio Speaker Output Circuit Low - Base

B1409 - Rear Left Audio Speaker Output Circuit Low - Base






For a complete wiring diagram, refer to.

• There are two versions of the B1409 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 B1409-PREMIUM test. If the vehicle is not equipped with an Amplifier use the B1409-BASE test.

Theory of Operation

The (X303) Left Rear Speaker (+) circuit and the (X393) Left Rear Speaker (-) 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 a short to ground condition on the speaker output circuit.






Test Step 1 - CHECK FOR AN INTERMITTENT CONDITION

• Turn the ignition on and open one of the front doors.

• A front door must remain open whenever checking or erasing Radio DTCs.

• Using the scan tool, record and erase the Radio DTCs.

• Turn the Radio on.

• Adjust the speakers to the rear and center.

• Using the scan tool, read the active Radio DTCs.

Does the scan tool read: B1409-REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

• Go to Test Step 2 => [ Test Step 2 - CHECK LEFT REAR SPEAKER ]

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. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 2 - CHECK LEFT REAR SPEAKER

• Make sure one of the front doors is still open.

• Using the scan tool, erase the DTCs.

• Turn the ignition off.

• Disconnect the Left Rear Speaker harness connector from the Left Rear Speaker.

• Turn the ignition on.

• Turn the radio on.

• Using the scan tool, read the active Radio DTCs.

Does the scan tool read: B1401-FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW?

Yes

• Go to Test Step 3 => [ Test Step 3 - CHECK THE (X303) LEFT REAR SPEAKER (+) CIRCUIT FOR
A SHORT TO GROUND ]

No

• Replace the Left Rear Speaker.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

Test Step 3 - CHECK THE (X303) LEFT REAR SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND







• Turn the ignition off.

• Disconnect the Radio harness connector.

• Measure the resistance between ground and the (X303) Left Rear Speaker (+) circuit.

Is the resistance below 5.0 Ohms?

Yes

• Repair the (X303) Left Rear Speaker (+) circuit for a short to ground.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Go to Test Step 4 => [ Test Step 4 - CHECK THE (X393) LEFT REAR SPEAKER (-) CIRCUIT FOR
A SHORT TO GROUND ]

Test Step 4 - CHECK THE (X393) LEFT REAR SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND







• Measure the resistance between ground and the (X393) Left Rear Speaker (-) circuit.

Is the resistance below 5.0 Ohms?

Yes

• Repair the (X393) Left Rear Speaker (-) circuit for a short to ground.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior

No

• Replace the Radio.

• Perform the Body Verification Test. Refer to => Non-DTC Based Diagnostics. Body Interior