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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> (Engine Sound Enhancement Module (ESEM) - Electrical Diagnostics) >> DTC Troubleshooting >> B140E-13-Engine Shaker Speaker Input - Circuit Open >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
    3. With the scan tool, read the Engine Sound Enhancement Module (ESEM) DTCs.

      Is the DTC active?

      Yes 

      • Go to 2.

      No 

  2. CHECK SHAKER MICROPHONE ELECTRICAL CONNECTION 
    1. Turn the ignition off.
    2. Check for loose, damaged or corroded connections on the Shaker Microphone and on the ESEM.

      Are there any loose or damaged connections?

      Yes 

      • Repair the wiring connections as necessary.

      No 

      • Go to 3.
  3. CHECK THE (K245) ENGINE ON SIGNAL FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (K245) Engine On Signal circuit between the Speaker connector and the ESEM harness connector.

      Is the resistance above 3.0 ohms?

      Yes 

      • Repair the (K245) Engine On Signal circuit for an open or high resistance.

      No 

      • Go to 4.
  4. CHECK SHAKER MICROPHONE OPERATION 
    1. Check that the Shaker Microphone is working properly.

      Is the Shaker Microphone operating correctly?

      Yes 

      • Go to 5.

      No 

      • Replace the Shaker Microphone.
  5. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all Engine Sound Enhancement Module (ESEM) harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Reconnect all ESEM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read ESEM DTCs.

      Did the DTC return?

      Yes 

      • Replace the Engine Sound Enhancement Module (ESEM).
      • Perform the Body VERIFICATION TEST. Refer to BODY VERIFICATION TEST .

      No 

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