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Home >> Fiat >> 2015 >> 500L Pop, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> (Audio (Radio) - Electrical Diagnostics - 500L) >> DTC Troubleshooting >> B1400-1A-Front Left Audio Speaker Output - Circuit Resistance Below Threshold - Base >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN INTERMITTENT CONDITION 
    1. Turn the ignition on.
      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: B1400-1A-FRONT LEFT AUDIO SPEAKER OUTPUT - CIRCUIT RESISTANCE BELOW THRESHOLD?

      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 VERIFICATION TEST .
  2. CHECK THE LEFT FRONT SPEAKERS 
    1. Using the scan tool, erase the DTCs.
    2. Turn the ignition off.
    3. Disconnect the Left Front Speaker harness connector from the Left Front Speaker.
    4. Disconnect the Front Door Tweeter Speaker harness connector from the Front Door Tweeter Speaker.
    5. Turn the ignition on.
    6. Turn the radio on.
    7. Using the scan tool, read the active Radio DTCs.

      Does the scan tool read: B1400-1A-FRONT LEFT AUDIO SPEAKER OUTPUT - CIRCUIT RESISTANCE BELOW THRESHOLD?

      Yes 

      • Go To  4

      No 

      • Go To  3
  3. CHECK THE LEFT FRONT DOOR TWEETER SPEAKER 
    1. Make sure one of the front doors is still open.
    2. Using the scan tool, erase the DTCs.
    3. Turn the ignition off.
    4. Re-connect the Left Front Speaker harness connector to the Left Front Speaker.
    5. Turn the ignition on.
    6. Turn the radio on.
    7. Using the scan tool, read the active Radio DTCs.

      Does the scan tool read: B1400-1A-FRONT LEFT AUDIO SPEAKER OUTPUT - CIRCUIT RESISTANCE BELOW THRESHOLD?

      Yes 

      • Replace the Left Front Speaker in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Front Door Tweeter Speaker in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  4. CHECK THE (X201) LEFT FRONT DOOR SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the Radio C1 harness connector.
    3. Measure the resistance between ground and the (X201) Left Front Door Speaker (+) circuit

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (X201) Left Front Door Speaker (+) circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Go To  5
  5. CHECK THE (X291) LEFT FRONT DOOR SPEAKER (-) CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance between ground and the (X291) Left Front Door Speaker (-) circuit.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Repair the (X291) Left Front Door Speaker (-) circuit for a short to ground.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

      • Replace the Radio in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
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