Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN INTERMITTENT CONDITION
NOTE:
A front door must remain open whenever checking or erasing Radio DTCs.
1. Using the scan tool, record and erase the Radio DTCs.
2. Cycle the ignition switch from on to off, wait five seconds and then back to on.
3. Turn the radio on and set the volume to 25.
4. Adjust the speakers to the Rear and center.
5. Using the scan tool, read the active Radio DTCs.
  Does the scan tool display active: B2004-12 REAR RIGHT AUDIO SPEAKER OUTPUT- CIRCUIT SHORT TO BATTERY?
  
  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. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
CHECK FOR VOLTAGE ON THE (X304) RIGHT REAR SPEAKER (+) CIRCUIT
1. Turn the ignition off.
2. Disconnect the Radio harness connector.
3. Disconnect the Right Rear Speaker harness connector.
4. Turn the ignition on.
5. Measure for voltage between the (X304) Right Rear Speaker (+) circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (X304) Right Rear Speaker (+) circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
  No
  - Go To 3
CHECK FOR VOLTAGE ON THE (X394) RIGHT REAR SPEAKER (-) CIRCUIT
1. Measure for voltage between the (X394) Right Rear Speaker (-) circuit and ground.
  Is there any voltage present?
  
  Yes
  - Repair the (X394) Right Rear Speaker (-) circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .
  No
  - Replace the Radio in accordance with the Service Information. Refer to RADIO, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY CONTROL MODULE (BCM) - BODY VERIFICATION TEST - 500 - EXCEPT ELECTRIC .