Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnostic Test
- CHECK FOR AN INTERMITTENT CONDITION
- Turn the ignition on and open one of the front doors.NOTE:
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: B140F-REAR RIGHT AUDIO SPEAKER OUTPUT CIRCUIT LOW?
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.
- Refer to Standard Procedure and perform the BODY VERIFICATION TEST.
- Turn the ignition on and open one of the front doors.
- CHECK THE AMPLIFIER
- Turn the ignition off.
- Disconnect the Amplifier C1 harness connector.
- Connect a jumper wire between the (X52) Left Rear Audio (+) circuit and the (X58) Left Rear Audio (-) circuits.
- Turn the ignition on.
- 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: B140F-REAR RIGHT AUDIO SPEAKER OUTPUT CIRCUIT OPEN?
Yes
- Go To 3.
No
- Replace the Amplifier in accordance with the Service Information.
- Refer to Standard Procedure and perform the BODY VERIFICATION TEST.
- CHECK THE (X52) RIGHT REAR AUDIO (+) CIRCUIT FOR AN OPEN
- Turn the ignition off.
- Disconnect the Radio C2 harness connector.
- Measure the resistance of the (X52) Right Rear Audio (+) circuit between the Radio C2 connector and the Amplifier C1 harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Go To 4.
No
- Repair an open in the (X52) Right Rear Audio (+) circuit.
- Refer to Standard Procedure and perform the BODY VERIFICATION TEST.
- CHECK THE (X58) RIGHT REAR AUDIO (-) CIRCUIT FOR AN OPEN
- Measure the resistance of the (X58) Right Rear Audio (-) circuit between the Radio C2 connector, and the Amplifier C1 harness connector.
Is the resistance below 5.0 Ohms?
Yes
- Replace the Radio in accordance with the Service Information.
- Refer to Standard Procedure and perform the BODY VERIFICATION TEST.
No
- Repair an open in the (X58) Right Rear Audio (-) circuit.
- Refer to Standard Procedure and perform the BODY VERIFICATION TEST.
- Measure the resistance of the (X58) Right Rear Audio (-) circuit between the Radio C2 connector, and the Amplifier C1 harness connector.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.